[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.17"]
[Round "1"]
[White "Donner, Jan"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "E55"]
[PlyCount "85"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4
Nbd7 9. Qe2 a6 10. a3 Ba5 11. Bd3 Bc7 12. Rd1 Qe7 13. dxc5 Nxc5 14. Bc2 Ncd7
15. Bd2 Rd8 16. Rac1 Nf8 17. e4 e5 18. Bg5 Be6 19. Nh4 h6 20. Nf5 Bxf5 21. Bxf6
Qxf6 22. exf5 Rd4 23. Be4 Bb6 24. Bxb7 Ra7 25. Be4 Rad7 26. Nd5 Qd8 27. Qf3 Nh7
28. Rxd4 Bxd4 29. f6 Nxf6 30. Nxf6+ gxf6 31. Bf5 Rc7 32. Rd1 a5 33. h4 Qb8 34.
b4 axb4 35. Rb1 Rc3 36. Qg4+ Kf8 37. axb4 Qa7 38. Qe2 Ra3 39. Rc1 Ra1 40. Rxa1
Qxa1+ 41. Kh2 Bb6 42. Qd2 Kg7 43. Kg3 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.17"]
[Round "1"]
[White "Ivkov, Borislav"]
[Black "Larsen, Bent"]
[Result "1-0"]
[ECO "E16"]
[PlyCount "92"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Bxd2+ 7. Qxd2 d6 8.
Nc3 O-O 9. Nh4 Bxg2 10. Nxg2 e5 11. dxe5 dxe5 12. Qxd8 Rxd8 13. e3 Nc6 14. Ke2
e4 15. g4 Nxg4 16. Nxe4 Re8 17. Nc3 Nd4+ 18. Kf1 Nf3 19. h3 Nf6 20. Rd1 Rad8
21. Nd5 Nxd5 22. cxd5 c5 23. h4 Kf8 24. Nf4 Rd6 25. Ke2 Ne5 26. a4 Nc4 27. b3
Na5 28. Rb1 Re4 29. Kd3 Re7 30. Kc3 g6 31. Rbe1 h6 32. f3 Rf6 33. Rhf1 Re5 34.
b4 cxb4+ 35. Kxb4 g5 36. Nh5 Rd6 37. e4 f5 38. hxg5 hxg5 39. Ng3 fxe4 40. fxe4+
Ke8 41. Nf5 Rg6 42. Rh1 Nb7 43. Rh8+ Kd7 44. Rh7+ Kc8 45. Ne7+ Rxe7 46. Rxe7 g4
1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.17"]
[Round "1"]
[White "Petrosian, Tigran"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "D59"]
[PlyCount "57"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. Rc1
Bb7 9. cxd5 Nxd5 10. Nxd5 exd5 11. Bxe7 Qxe7 12. Qa4 c5 13. Qa3 Rc8 14. Be2 Nd7
15. O-O Qf8 16. dxc5 bxc5 17. Rc2 Qd6 18. Rfc1 Qb6 19. Nd2 Re8 20. Nb3 d4 21.
Nxc5 Nxc5 22. Rxc5 dxe3 23. fxe3 Re7 24. Rb5 Qxe3+ 25. Qxe3 Rxe3 26. Rxb7 Rxe2
27. Rcc7 Rd8 28. Rd7 Rc8 29. Rbc7 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.17"]
[Round "1"]
[White "Portisch, Lajos"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "E69"]
[PlyCount "65"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4
c6 9. Rb1 Re8 10. h3 a5 11. Re1 exd4 12. Nxd4 Nc5 13. Bf4 Bf8 14. b3 Nfd7 15.
Rb2 Ne5 16. Rd2 Qb6 17. Be3 a4 18. f4 Ned7 19. Rb2 axb3 20. axb3 Qb4 21. Qd2
Bg7 22. e5 dxe5 23. Nc2 Qb6 24. b4 exf4 25. gxf4 Rxe3 26. Nxe3 Ne6 27. f5 Nd4
28. c5 Qc7 29. Rf1 gxf5 30. Ra2 Rxa2 31. Qxa2 Nf8 32. Qf2 b6 33. Na4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.17"]
[Round "1"]
[White "Reshevsky, Samuel Herman"]
[Black "Fischer, Robert James"]
[Result "1/2-1/2"]
[ECO "E97"]
[PlyCount "84"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. Be3 Nc6 8. O-O
Re8 9. dxe5 dxe5 10. Qxd8 Nxd8 11. Nb5 Ne6 12. Ng5 Re7 13. Nxe6 Bxe6 14. f3 c6
15. Nc3 Rd7 16. Rfd1 Bf8 17. Kf2 b6 18. b3 Rb7 19. Na4 Nd7 20. Nb2 b5 21. cxb5
cxb5 22. Rdc1 a5 23. Nd3 Ba3 24. Rc6 b4 25. Rb1 a4 26. Nc5 Nxc5 27. Rxc5 axb3
28. axb3 f6 29. Bc4 Bxc4 30. bxc4 b3 31. Rb5 Rxb5 32. cxb5 b2 33. b6 Kf7 34.
Ke2 Ke6 35. Kd3 Rc8 36. Bd2 Rc6 37. Ba5 Rc5 38. Bc3 Rb5 39. Kc2 Rxb6 40. Bxb2
Rxb2+ 41. Rxb2 Bxb2 42. Kxb2 Kd6 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.19"]
[Round "2"]
[White "Fischer, Robert James"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "C95"]
[PlyCount "142"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Nb8 10. d4 Nbd7 11. c4 c6 12. c5 Qc7 13. cxd6 Bxd6 14. Bg5 exd4 15.
Bxf6 gxf6 16. Qxd4 Ne5 17. Nbd2 Rd8 18. Qe3 Nd3 19. Qh6 Bf4 20. Qxf6 Rd6 21.
Qc3 Nxe1 22. Rxe1 Qd8 23. Re2 Rg6 24. Kh1 Be6 25. Bxe6 fxe6 26. g3 Bh6 27. Kg2
Rc8 28. e5 Qd5 29. Ne4 Bg7 30. b3 Rf8 31. Qc2 Rf4 32. Ned2 c5 33. Re3 Qc6 34.
Ne4 c4 35. bxc4 bxc4 36. Ned2 Bh6 37. Rc3 Rg7 38. Rd3 Qa8 39. Nxc4 Qc6 40. Na3
Qxc2 41. Nxc2 Ra4 42. Rd8+ Kf7 43. a3 Rg6 44. h4 Bf8 45. Ng5+ Ke7 46. Ra8 h6
47. Nh7 Bg7 48. Ra7+ Ke8 49. h5 Rgg4 50. f3 Rgc4 51. Rxg7 Rxc2+ 52. Kh3 Rxa3
53. f4 Rf2 54. Nf6+ Kf8 55. Rg4 a5 56. Ne4 Rc2 57. Rg6 Re3 58. Nd6 Rcc3 59.
Rxe6 Rxg3+ 60. Kh4 Rg1 61. f5 Rc2 62. Re8+ Kg7 63. f6+ Kh7 64. Re7+ Kg8 65. Kh3
Rc3+ 66. Kh4 Rc2 67. Kh3 Rc3+ 68. Kh2 Rcg3 69. f7+ Kg7 70. Nf5+ Kf8 71. Nxg3
Rxg3 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.19"]
[Round "2"]
[White "Larsen, Bent"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B67"]
[PlyCount "115"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 d6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Bg5 e6 7. Qd2 a6 8.
O-O-O Bd7 9. f4 h6 10. Bh4 Nxe4 11. Qe1 Nf6 12. Nf5 Qa5 13. Nxd6+ Bxd6 14. Rxd6
O-O-O 15. Rd2 Ne7 16. Qe5 Qxe5 17. fxe5 Nf5 18. Bxf6 gxf6 19. exf6 Bc6 20. Bd3
Rhg8 21. Ne4 Ne3 22. g3 Bxe4 23. Bxe4 Rxd2 24. Kxd2 Ng4 25. Bd3 Kd7 26. a4 a5
27. b4 axb4 28. Rb1 Nxh2 29. Rxb4 Kc7 30. a5 Nf3+ 31. Ke2 Ne5 32. Be4 Nc6 33.
Rc4 Ra8 34. Bxc6 bxc6 35. Ra4 h5 36. Kf3 Rg8 37. Rb4 Ra8 38. Ra4 Rg8 39. a6 Kb6
40. a7 Ra8 41. Kf4 Rxa7 42. Rxa7 Kxa7 43. Ke5 Kb6 44. Kd6 Kb5 45. Ke7 e5 46.
Kxf7 e4 47. Kg6 e3 48. f7 e2 49. f8=Q e1=Q 50. Qb8+ Ka6 51. Kxh5 Qh1+ 52. Kg6
Qe4+ 53. Kf6 Qxc2 54. g4 Qf2+ 55. Kg6 c5 56. g5 c4 57. Qc8+ Kb5 58. Qf5+
1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.19"]
[Round "2"]
[White "Najdorf, Miguel"]
[Black "Ivkov, Borislav"]
[Result "1-0"]
[ECO "D22"]
[PlyCount "51"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. h3 Bh5 6. Bxc4 e6 7. Nc3 a6 8. O-O
Nc6 9. Be2 Bd6 10. b3 O-O 11. Bb2 Qe8 12. Nd2 Bxe2 13. Qxe2 e5 14. d5 Nb4 15.
Nc4 Nbxd5 16. Nxd5 Nxd5 17. Rfd1 Qe6 18. Nxd6 Qxd6 19. Qc4 Nb6 20. Qe4 Qe6 21.
Qxb7 Rfc8 22. Rac1 c5 23. Rxc5 f6 24. Rxc8+ Rxc8 25. Qxa6 Rc2 26. Qb7 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.19"]
[Round "2"]
[White "Petrosian, Tigran"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "E12"]
[PlyCount "82"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. e3 Be7 8. Bb5+
c6 9. Bd3 O-O 10. Bd2 Nd7 11. Nxd5 cxd5 12. O-O Bd6 13. Qa4 a6 14. Bb4 Qe7 15.
Bxd6 Qxd6 16. Rac1 Rfc8 17. Nd2 b5 18. Rxc8+ Rxc8 19. Qd1 Nb6 20. Nb3 Nc4 21.
Qe2 Bc6 22. Nc5 a5 23. h4 a4 24. h5 h6 25. f4 f5 26. Rf2 Rf8 27. g3 Qe7 28. Rg2
Be8 29. Kf2 Rf6 30. Rh2 Rf8 31. Ke1 Rf6 32. Bb1 Rf8 33. Nd3 Qc7 34. Kf2 Rf6 35.
Rh1 Rf8 36. Qe1 Qd6 37. Qc3 Rf7 38. Ba2 Rc7 39. Nc5 Re7 40. Bb1 Rc7 41. Qb4 Qe7
1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.19"]
[Round "2"]
[White "Spassky, Boris"]
[Black "Unzicker, Wolfgang"]
[Result "1-0"]
[ECO "C95"]
[PlyCount "91"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
d6 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15.
Bg5 h6 16. Bd2 Bg7 17. Rc1 c5 18. d5 Nb6 19. Bd3 Qc7 20. Nh2 Na4 21. Rb1 c4 22.
Bc2 Nc5 23. Ng4 Kh7 24. Qf3 Nxg4 25. hxg4 Qe7 26. b3 cxb3 27. axb3 Bf6 28. Nf1
Bg5 29. Ne3 Bc8 30. g3 Nd7 31. Qe2 Nf6 32. f3 h5 33. Kg2 Qd8 34. Rh1 Kg8 35.
Rbf1 Bh6 36. Nf5 Bxd2 37. Qxd2 gxf5 38. Qh6 fxe4 39. fxe4 Bxg4 40. Rxf6 Qe7 41.
Qg5+ Kf8 42. Bd1 Bxd1 43. Rxd1 Rec8 44. Rdf1 Rxc3 45. Qxh5 Rc2+ 46. Kh1 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.20"]
[Round "3"]
[White "Donner, Jan"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "E72"]
[PlyCount "82"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 c6 6. e4 d6 7. Nge2 e5 8. O-O
Nbd7 9. Rb1 Re8 10. h3 a6 11. b4 b5 12. cxb5 axb5 13. Be3 Bb7 14. Re1 exd4 15.
Nxd4 Ne5 16. a4 bxa4 17. Nxa4 Nc4 18. Bc1 c5 19. bxc5 Bxe4 20. Rb4 Bxg2 21.
Rxe8+ Nxe8 22. Kxg2 dxc5 23. Nxc5 Rc8 24. Ncb3 Qe7 25. Rb5 Ned6 26. Rc5 Qe4+
27. Nf3 Rxc5 28. Nxc5 Qc6 29. Nb3 h6 30. Bf4 Nf5 31. Qd8+ Kh7 32. Qc7 Qd5 33.
Qc5 Qe4 34. Qa7 g5 35. Nbd2 Nxd2 36. Bxd2 Qd5 37. Be3 Bf6 38. Qa6 Kg7 39. Qe2
Qe4 40. Kg1 Qb1+ 41. Kh2 Qe4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.20"]
[Round "3"]
[White "Ivkov, Borislav"]
[Black "Fischer, Robert James"]
[Result "0-1"]
[ECO "A49"]
[PlyCount "83"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. Nc3 d5 7. Ne5 c6 8. e4
Be6 9. exd5 cxd5 10. Ne2 Nc6 11. Nf4 Bf5 12. c3 Be4 13. Bh3 Qc7 14. Nfd3 Bxd3
15. Nxd3 e6 16. Bf4 Qd8 17. Re1 Re8 18. Bg2 Nd7 19. h4 h5 20. Bf3 b5 21. a3 a5
22. Qe2 Rc8 23. Bd6 Qb6 24. Be5 Ndxe5 25. Nxe5 Nxe5 26. dxe5 b4 27. axb4 axb4
28. Qe3 Qxe3 29. Rxe3 bxc3 30. bxc3 Rc5 31. Be2 Rec8 32. Ra3 Bf8 33. Rb3 Be7
34. Kg2 Bd8 35. Ba6 Ra8 36. Rf3 Bc7 37. Rb5 Rc4 38. Bb7 Ra3 39. Re3 Kg7 40. Bc8
Raxc3 41. Re1 Rc2 42. Bd7 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.20"]
[Round "3"]
[White "Portisch, Lajos"]
[Black "Petrosian, Tigran"]
[Result "1-0"]
[ECO "E66"]
[PlyCount "63"]
[EventDate "1966.07.17"]

1. c4 g6 2. d4 Bg7 3. Nf3 d6 4. Nc3 Nf6 5. g3 O-O 6. Bg2 Nc6 7. O-O a6 8. d5
Na5 9. Nd2 c5 10. Qc2 Rb8 11. b3 b5 12. Bb2 bxc4 13. bxc4 Bh6 14. f4 e5 15.
Rae1 exf4 16. gxf4 Nh5 17. e3 Re8 18. Nce4 Bf5 19. Bc3 Nb7 20. Qa4 a5 21. Rb1
Qe7 22. Rfe1 Bd7 23. Qc2 Bf5 24. Qa4 Kf8 25. Rb6 Rbd8 26. Qb3 Bc8 27. Nf1 Rd7
28. Nfg3 Nxg3 29. hxg3 Bg7 30. Qb2 f5 31. Bxg7+ Qxg7 32. Nf6 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.20"]
[Round "3"]
[White "Reshevsky, Samuel Herman"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "E43"]
[PlyCount "39"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. Nf3 O-O 7. O-O c5 8. Na4
cxd4 9. a3 Be7 10. exd4 d6 11. Re1 Nbd7 12. b4 Re8 13. Bb2 Bf8 14. Nc3 g6 15.
Ne4 Nxe4 16. Bxe4 d5 17. Bd3 dxc4 18. Bxc4 Bg7 19. Qe2 a6 20. b5 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.20"]
[Round "3"]
[White "Unzicker, Wolfgang"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "B61"]
[PlyCount "75"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 Bd7 7. Qd2 Nxd4 8.
Qxd4 Bc6 9. O-O-O Qa5 10. h4 h6 11. Bxf6 gxf6 12. Rh3 Qe5 13. Qe3 e6 14. Bb5
Rg8 15. f4 Qc5 16. Qe2 a6 17. Bxc6+ bxc6 18. e5 f5 19. g4 Qb4 20. Qf3 d5 21.
gxf5 Rb8 22. b3 exf5 23. Rg3 Rg4 24. Ne2 h5 25. Nd4 Rb6 26. Kb1 Bc5 27. c3 Qa3
28. Nxf5 a5 29. Nd6+ Kf8 30. Rxg4 hxg4 31. Qxg4 Rxb3+ 32. axb3 Qxb3+ 33. Ka1
Qxc3+ 34. Kb1 Qb3+ 35. Ka1 Qa3+ 36. Kb1 Qb3+ 37. Ka1 Qa3+ 38. Kb1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.21"]
[Round "4"]
[White "Fischer, Robert James"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "C89"]
[PlyCount "68"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d4 Bd6 13. Re1 Qh4 14. g3 Qh3 15.
Be3 Bg4 16. Qd3 Nxe3 17. Rxe3 c5 18. Qf1 Qh6 19. Nd2 Rad8 20. Nf3 Bxf3 21. Rxf3
cxd4 22. cxd4 Qd2 23. Rd3 Qg5 24. Rc1 Rc8 25. Rdc3 Rxc3 26. bxc3 Ba3 27. Rc2
Rc8 28. c4 bxc4 29. Bxc4 Qf5 30. Bd3 Rxc2 31. Bxf5 Rc1 32. Qxc1 Bxc1 33. Kf1 h6
34. Ke2 Kf8 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.21"]
[Round "4"]
[White "Najdorf, Miguel"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "E59"]
[PlyCount "52"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O Nc6 8. a3
Bxc3 9. bxc3 dxc4 10. Bxc4 Qc7 11. Bd3 e5 12. Qc2 Re8 13. dxe5 Nxe5 14. Nxe5
Qxe5 15. f3 Be6 16. Re1 Rad8 17. Rb1 Qd5 18. Bf1 Bf5 19. e4 Nxe4 20. Qb3 Nxc3
21. Rxe8+ Rxe8 22. Qxd5 Nxd5 23. Rxb7 Kf8 24. Kf2 Re7 25. Rb8+ Re8 26. Rb7 Re7
1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.21"]
[Round "4"]
[White "Petrosian, Tigran"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "E74"]
[PlyCount "50"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 a6 8. a4 Qa5
9. Bd2 e6 10. Nf3 exd5 11. cxd5 Re8 12. O-O Qc7 13. Qc2 Bg4 14. b3 Nbd7 15. h3
Bxf3 16. Bxf3 c4 17. b4 Re7 18. Rfe1 Rae8 19. Rac1 h6 20. a5 Qb8 21. Qb1 Kh8
22. Na4 Ne5 23. Be2 Ned7 24. Bf3 Ne5 25. Be2 Ned7 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.21"]
[Round "4"]
[White "Reshevsky, Samuel Herman"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "D28"]
[PlyCount "32"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 dxc4 3. Nf3 c5 4. e3 e6 5. Bxc4 Nf6 6. O-O a6 7. Qe2 b5 8. Bd3
cxd4 9. exd4 Be7 10. a4 bxa4 11. Rxa4 Bb7 12. Nc3 O-O 13. Bg5 Bc6 14. Raa1 a5
15. Rfd1 Nbd7 16. Ne5 Nxe5 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.21"]
[Round "4"]
[White "Spassky, Boris"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "B64"]
[PlyCount "160"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Qd2 Be7 8.
O-O-O O-O 9. f4 h6 10. Bh4 e5 11. Nf5 Bxf5 12. exf5 Qa5 13. Kb1 Rad8 14. Bxf6
Bxf6 15. Nd5 Qxd2 16. Rxd2 exf4 17. Nxf6+ gxf6 18. Be2 Rfe8 19. Rf1 Re4 20. Bf3
Re7 21. a3 Ne5 22. Bd5 Ng4 23. Rxf4 Ne3 24. Bb3 Re5 25. Rd3 Kf8 26. g4 b5 27.
a4 a6 28. Rc3 d5 29. Rd4 Ke7 30. h3 Nc4 31. Rcd3 Rd6 32. Rd1 Ne3 33. R1d3 Kd7
34. Rf4 Nc4 35. Rf1 Kc6 36. Kc1 Rd8 37. Rfd1 h5 38. gxh5 Rh8 39. Rg3 Rxh5 40.
Rg8 Rxh3 41. Rc8+ Kb7 42. Rf8 Rxf5 43. Rxf7+ Kb6 44. Rd7 Ne3 45. Re1 Rhf3 46.
Rd6+ Ka5 47. axb5 Kxb5 48. Kd2 Re5 49. Kc1 a5 50. Rd8 Rf4 51. Rb8+ Kc6 52. Ra8
Kb7 53. Rd8 a4 54. Ba2 Rf2 55. Kb1 Kc7 56. Ra8 Nc4 57. Rd1 Nb6 58. Ra7+ Kc6 59.
b3 Ree2 60. Rc1 Re4 61. Rd1 Rb4 62. Kb2 Rb5 63. Kc1 Rc5 64. Rd2 Rf1+ 65. Rd1
Rf2 66. Rd2 Rf1+ 67. Rd1 Rf4 68. bxa4 Nxa4 69. Re1 Nc3 70. Re6+ Kb5 71. Rb7+
Ka5 72. Bb3 Rb5 73. Rc7 d4 74. Kb2 Rf1 75. Rcc6 f5 76. Ka3 Ra1+ 77. Kb2 Rb1+
78. Ka3 Ra1+ 79. Kb2 Rb1+ 80. Ka3 Ra1+ 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.24"]
[Round "5"]
[White "Donner, Jan"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[ECO "E92"]
[PlyCount "69"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 c5 3. d5 g6 4. Nc3 Bg7 5. e4 d6 6. Nf3 O-O 7. Be2 e5 8. O-O Ne8
9. Ne1 f5 10. Nd3 Nd7 11. exf5 gxf5 12. f4 Qe7 13. g4 e4 14. Nf2 Bxc3 15. bxc3
fxg4 16. Nxg4 Kh8 17. Kh1 Ng7 18. Ne3 Nf6 19. Bd2 Ng8 20. Qe1 Nh6 21. Qg3 Ngf5
22. Qg5 Bd7 23. Rae1 Rf6 24. Nxf5 Nxf5 25. Rg1 Qf8 26. Bh5 Ng7 27. Rxe4 Nxh5
28. Qxh5 Re8 29. Rxe8 Bxe8 30. Qe2 Bg6 31. Rg3 Qc8 32. Kg2 Qf5 33. Re3 Rf8 34.
h3 Qc2 35. Be1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.24"]
[Round "5"]
[White "Ivkov, Borislav"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "C88"]
[PlyCount "186"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4
b4 9. d3 d6 10. Nbd2 Rb8 11. Nc4 Bg4 12. Be3 Nd7 13. Ncd2 Na5 14. Ba2 c5 15.
Nc4 Be6 16. Nfd2 Nxc4 17. Bxc4 Bxc4 18. Nxc4 Nb6 19. Nd2 a5 20. c3 d5 21. exd5
bxc3 22. bxc3 Qxd5 23. Qc2 Rfd8 24. Reb1 f5 25. Nf3 f4 26. c4 Qd6 27. Bd2 Bf6
28. Ra3 Ra8 29. Rab3 Nd7 30. Be1 Nb8 31. Nd2 Qf8 32. Ne4 Nc6 33. Rb6 Nd4 34.
Qd1 Be7 35. Bc3 f3 36. Bxd4 Rxd4 37. Qxf3 Qxf3 38. gxf3 Rxd3 39. Re6 Bf8 40.
Rxe5 Rxf3 41. Nxc5 Rc8 42. Rb5 Bd6 43. Rd5 Bxc5 44. Rbxc5 Rxc5 45. Rxc5 Rc3 46.
Kf1 Kf7 47. Ke2 Ke6 48. h4 Kd6 49. Kd2 Rf3 50. Rxa5 Rxf2+ 51. Kc3 Rh2 52. Rh5
h6 53. Rd5+ Kc6 54. h5 g5 55. hxg6 Rg2 56. Rb5 Rxg6 57. a5 Rg1 58. Rh5 Kb7 59.
Rxh6 Rc1+ 60. Kb4 Rb1+ 61. Kc5 Rg1 62. Rb6+ Kc7 63. Rc6+ Kb7 64. Rb6+ Kc7 65.
Rd6 Kb7 66. a6+ Ka7 67. Kb5 Rb1+ 68. Kc6 Kxa6 69. c5 Ka7 70. Rd7+ Kb8 71. Rd8+
Ka7 72. Kc7 Rh1 73. c6 Rh7+ 74. Rd7 Rh8 75. Rf7 Rg8 76. Rh7 Ka6 77. Rd7 Ka7 78.
Rd8 Rg7+ 79. Kd6 Rg6+ 80. Kc5 Rg5+ 81. Rd5 Rg1 82. Rd8 Rg5+ 83. Kd6 Rg6+ 84.
Kc7 Rg7+ 85. Rd7 Rg8 86. Re7 Rh8 87. Rg7 Ka6 88. Rd7 Ka7 89. Re7 Ka6 90. Rf7
Ka7 91. Kd6+ Kb8 92. Kd7 Rg8 93. Rh7 Ka7 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.24"]
[Round "5"]
[White "Larsen, Bent"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[ECO "E99"]
[PlyCount "137"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. O-O Nc6 8. d5
Ne7 9. Ne1 Nd7 10. Nd3 f5 11. Bd2 Nf6 12. f3 f4 13. c5 g5 14. Rc1 Ng6 15. cxd6
cxd6 16. Nb5 Rf7 17. Qc2 Ne8 18. a4 Bd7 19. Qb3 Bf8 20. Rc2 h5 21. Nf2 a6 22.
Na3 Nf6 23. h3 Rg7 24. Rfc1 g4 25. fxg4 hxg4 26. hxg4 Ne8 27. a5 Rb8 28. Be1
Be7 29. Qb6 Qxb6 30. axb6 Bd8 31. Ba5 Ne7 32. b3 Nc8 33. Nc4 Bh4 34. Nd2 Bd8
35. Nc4 Bh4 36. Bf3 Nf6 37. Nd2 Ne8 38. Rc3 Ra8 39. Nc4 Bd8 40. Be2 Rb8 41.
R1c2 Bh4 42. Rh3 Bd8 43. g3 fxg3 44. Rxg3 Bh4 45. Rh3 Bg5 46. Rhc3 Bd8 47. Bd1
Ne7 48. Bf3 Nc8 49. Nd1 Bxg4 50. Bxg4 Rxg4+ 51. Rg2 Rxg2+ 52. Kxg2 Nf6 53. Kf3
Nd7 54. Bb4 Ndxb6 55. Nxd6 Be7 56. Nxc8 Bxb4 57. Nxb6 Bxc3 58. Nxc3 Kf7 59. Nd7
Re8 60. Ke3 Re7 61. Nb6 Rc7 62. Kd3 Ke7 63. b4 Kf6 64. d6 Rh7 65. Ncd5+ Ke6 66.
d7 Rh8 67. Ne3 Ke7 68. Nf5+ Ke6 69. Kc4 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.24"]
[Round "5"]
[White "Portisch, Lajos"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "E43"]
[PlyCount "63"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 b6 7. O-O Bb7 8. Na4
cxd4 9. exd4 Be7 10. Re1 d6 11. b4 Nbd7 12. Bb2 Re8 13. Nc3 Bf8 14. d5 e5 15.
Nd2 g6 16. Nb3 Nh5 17. g3 Ng7 18. c5 dxc5 19. bxc5 Nxc5 20. Bb5 Nd7 21. Ne4 Kh8
22. Bc6 Qc7 23. Rc1 Bxc6 24. dxc6 Nc5 25. Nexc5 bxc5 26. Qf3 Rac8 27. Nxc5 Qxc6
28. Qxf7 Bxc5 29. Rxe5 Bxf2+ 30. Qxf2 Qxc1+ 31. Bxc1 Rxe5 32. Bb2 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.24"]
[Round "5"]
[White "Unzicker, Wolfgang"]
[Black "Fischer, Robert James"]
[Result "1/2-1/2"]
[ECO "B92"]
[PlyCount "154"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. Bg5
Be6 9. Bxf6 Bxf6 10. Nd5 Nd7 11. O-O O-O 12. Qd3 Rc8 13. c3 Bg5 14. Rad1 g6 15.
Kh1 Bh6 16. Ne3 Nf6 17. Bf3 Rc6 18. Qe2 Qb6 19. Nd5 Bxd5 20. exd5 Rcc8 21. Qc2
Nd7 22. Be2 f5 23. f3 Kg7 24. Nd2 Qc7 25. a4 Bg5 26. Nc4 h5 27. Qb3 Rcd8 28.
Qa3 Nf6 29. Qb4 h4 30. Qb6 Qe7 31. Na5 Rd7 32. Nc4 Nh5 33. Rfe1 Bf4 34. Nd2 Qg5
35. Nf1 Rh8 36. Bd3 Rf7 37. Re2 Qf6 38. Kg1 Re8 39. Bc2 Bh6 40. Ree1 Nf4 41.
Kh1 Rc8 42. Qf2 Nh5 43. Kg1 Bf4 44. Bb3 Rc5 45. Ba2 Qg5 46. Qc2 Rc8 47. Bb1 Re8
48. Re2 Qd8 49. Ree1 b5 50. axb5 axb5 51. Qf2 Bg5 52. Bd3 Qb8 53. Ra1 Nf4 54.
Bc2 Qb7 55. Rad1 Bd8 56. Qd2 Bb6+ 57. Kh1 Rh8 58. Ne3 Nh5 59. h3 Ba7 60. Kh2
Qb6 61. Bd3 Ng3 62. b4 Rhf8 63. c4 f4 64. Ng4 bxc4 65. Bxc4 Rb8 66. Rb1 Rc7 67.
Ba2 Rbc8 68. Rec1 Rxc1 69. Rxc1 Ne2 70. Re1 Nc3 71. Bb1 Nxb1 72. Rxb1 Rc4 73.
Qe1 g5 74. Rc1 Qc7 75. Rxc4 Qxc4 76. Nxe5 Qxd5 77. Ng4 Kf7 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.25"]
[Round "6"]
[White "Fischer, Robert James"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "C82"]
[PlyCount "60"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5
Be6 9. c3 Bc5 10. Nbd2 O-O 11. Bc2 Bf5 12. Nb3 Bg4 13. Nxc5 Nxc5 14. Re1 Re8
15. Be3 Ne6 16. Qd3 g6 17. Bh6 Ne7 18. Nd4 Bf5 19. Nxf5 Nxf5 20. Bd2 Qh4 21.
Qf1 Nc5 22. g3 Qc4 23. Qg2 Nd3 24. Bxd3 Qxd3 25. Bg5 c6 26. g4 Ng7 27. Re3 Qd2
28. b3 b4 29. Qh3 bxc3 30. Qh6 Ne6 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.25"]
[Round "6"]
[White "Petrosian, Tigran"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D32"]
[PlyCount "74"]
[EventDate "1966.07.17"]

1. c4 Nf6 2. Nf3 e6 3. Nc3 d5 4. d4 c5 5. e3 Nc6 6. cxd5 exd5 7. Be2 Be7 8. O-O
O-O 9. dxc5 Bxc5 10. b3 Be6 11. Bb2 Qe7 12. a3 Rfd8 13. Nb5 Rac8 14. Nbd4 Nxd4
15. Nxd4 Ne4 16. Bd3 Bd6 17. Qh5 h6 18. b4 Nf6 19. Qe2 Bg4 20. Qe1 Bd7 21. h3
Ne4 22. f4 Re8 23. Rf3 Qd8 24. Ne2 Be7 25. Rc1 Bf6 26. Rxc8 Bxc8 27. Qa1 Qb6
28. Bxf6 Nxf6 29. Nd4 Bd7 30. Kh2 Qc7 31. Ne2 Qb6 32. Nd4 Qc7 33. Qe1 Rc8 34.
Ne2 Ba4 35. Bf5 Bd7 36. Bd3 Ba4 37. Bf5 Bd7 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.25"]
[Round "6"]
[White "Portisch, Lajos"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "E74"]
[PlyCount "85"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 a6 8. a4 Qa5
9. Bd2 e6 10. Nf3 exd5 11. cxd5 Re8 12. O-O Qc7 13. Qc2 Bg4 14. h3 Bxf3 15.
Bxf3 Nbd7 16. a5 Re7 17. Ra4 Rae8 18. Be2 h6 19. Kh2 g5 20. Bg4 Nxg4+ 21. hxg4
Be5+ 22. g3 Nf6 23. f3 Qd7 24. Raa1 h5 25. gxh5 Nxh5 26. Ne2 g4 27. Nf4 gxf3
28. Qd3 Qg4 29. Qxf3 Qxf3 30. Rxf3 Nf6 31. Bc3 Nxe4 32. Bxe5 Rxe5 33. Rb3 R8e7
34. Rb6 Rd7 35. Re1 Nf6 36. Rxe5 Ng4+ 37. Kh3 Nxe5 38. Nh5 Kf8 39. Nf6 Rc7 40.
Rxd6 Nc4 41. Rd7 Rxd7 42. Nxd7+ Ke7 43. Nxc5 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.25"]
[Round "6"]
[White "Reshevsky, Samuel Herman"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "E55"]
[PlyCount "71"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4
Nbd7 9. Bd3 b6 10. a3 cxd4 11. exd4 Bxc3 12. bxc3 Bb7 13. Re1 Qc7 14. Bd2 Rfe8
15. Qe2 Rac8 16. Rac1 Bd5 17. c4 Bb7 18. a4 Qc6 19. Bf4 Qxa4 20. Ra1 Qc6 21.
Rxa7 Ra8 22. Rxa8 Rxa8 23. h3 Ra3 24. d5 exd5 25. cxd5 Qxd5 26. Bc4 Qc5 27.
Bxf7+ Kxf7 28. Qe6+ Kg6 29. Bd6 Qa5 30. Ne5+ Nxe5 31. Rxe5 Ra1+ 32. Kh2 Qa8 33.
Qf5+ Kf7 34. Re7+ Kg8 35. Be5 Re1 36. Rxg7+ 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.25"]
[Round "6"]
[White "Spassky, Boris"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "D78"]
[PlyCount "71"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 c6 7. Nbd2 Bf5 8. b3
Ne4 9. Bb2 a5 10. Nh4 Nxd2 11. Qxd2 Bc8 12. e4 dxe4 13. Bxe4 Bh3 14. Rfe1 Nd7
15. Bh1 Re8 16. Nf3 h6 17. d5 e5 18. Re3 a4 19. b4 a3 20. Bc3 Nb6 21. Nxe5 Rxe5
22. Rxe5 Nxc4 23. Qf4 Nxe5 24. Bxe5 cxd5 25. Bxg7 Kxg7 26. Qe5+ Qf6 27. Qxf6+
Kxf6 28. Bxd5 Rd8 29. Bxb7 Rd2 30. b5 Be6 31. Be4 Rxa2 32. Rxa2 Bxa2 33. b6 Bc4
34. b7 a2 35. b8=Q a1=Q+ 36. Qb1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.27"]
[Round "7"]
[White "Donner, Jan"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "D36"]
[PlyCount "72"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. e3 Nbd7 7. Bd3 Be7 8.
Qc2 O-O 9. Nf3 Re8 10. O-O Nf8 11. Rab1 a5 12. a3 Ng6 13. b4 axb4 14. axb4 Ne4
15. Bxe7 Qxe7 16. Rfc1 Bg4 17. Ne1 Rad8 18. Na4 b5 19. Nc5 Nd6 20. Ra1 Nc4 21.
Rcb1 Ra8 22. Qc1 Nh4 23. Rxa8 Rxa8 24. Ra1 Qd8 25. g3 Nf3+ 26. Nxf3 Bxf3 27.
Bf5 h5 28. Bh3 h4 29. Bg2 Rxa1 30. Qxa1 Bxg2 31. Kxg2 Qc8 32. h3 hxg3 33. Kxg3
Nd6 34. Kg2 Nf5 35. Qd1 Nh4+ 36. Kg3 Nf5+ 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.27"]
[Round "7"]
[White "Ivkov, Borislav"]
[Black "Spassky, Boris"]
[Result "0-1"]
[ECO "E18"]
[PlyCount "72"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Nxe4
Bxe4 9. Ne1 Bxg2 10. Nxg2 d6 11. e4 Nd7 12. Be3 Qc8 13. Nf4 c6 14. Rc1 Re8 15.
Nd3 c5 16. f3 Qa6 17. a4 Bf6 18. Nf2 cxd4 19. Bxd4 Bxd4 20. Qxd4 Nc5 21. Qxd6
Qxa4 22. Qd1 Qb4 23. Qc2 Red8 24. Rfd1 h6 25. Rxd8+ Rxd8 26. Rd1 Rxd1+ 27. Nxd1
Qe1+ 28. Kg2 a5 29. h4 Kf8 30. h5 Ke7 31. Nf2 Qe3 32. Qd1 f6 33. Kf1 Nb3 34.
Kg2 Nd2 35. Nh3 Nxc4 36. Nf4 Qxf4 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.27"]
[Round "7"]
[White "Larsen, Bent"]
[Black "Petrosian, Tigran"]
[Result "1-0"]
[ECO "B39"]
[PlyCount "59"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Be3 Bg7 6. c4 Nf6 7. Nc3 Ng4 8.
Qxg4 Nxd4 9. Qd1 Ne6 10. Qd2 d6 11. Be2 Bd7 12. O-O O-O 13. Rad1 Bc6 14. Nd5
Re8 15. f4 Nc7 16. f5 Na6 17. Bg4 Nc5 18. fxg6 hxg6 19. Qf2 Rf8 20. e5 Bxe5 21.
Qh4 Bxd5 22. Rxd5 Ne6 23. Rf3 Bf6 24. Qh6 Bg7 25. Qxg6 Nf4 26. Rxf4 fxg6 27.
Be6+ Rf7 28. Rxf7 Kh8 29. Rg5 b5 30. Rg3 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.27"]
[Round "7"]
[White "Najdorf, Miguel"]
[Black "Fischer, Robert James"]
[Result "1-0"]
[ECO "A72"]
[PlyCount "61"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 8. Nf3 h6
9. Bh4 exd5 10. cxd5 g5 11. Bg3 b5 12. Nd2 a6 13. O-O Re8 14. Qc2 Qe7 15. Rae1
Nbd7 16. a4 b4 17. Nd1 Ne5 18. Ne3 Ng6 19. Nec4 Nf4 20. Bxf4 gxf4 21. e5 dxe5
22. Bf3 Qf8 23. Nxe5 Bb7 24. Ndc4 Rad8 25. Nc6 Rxe1 26. Rxe1 Re8 27. Rd1 Rc8
28. h3 Ne8 29. N6a5 Rb8 30. Qf5 Nd6 31. Nxd6 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.27"]
[Round "7"]
[White "Unzicker, Wolfgang"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "C93"]
[PlyCount "43"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
d6 9. h3 h6 10. d4 Re8 11. Nbd2 Bf8 12. Nf1 Bd7 13. Ng3 Na5 14. Bc2 c5 15. dxe5
dxe5 16. Nf5 Nc4 17. Nh2 Bxf5 18. Qxd8 Raxd8 19. exf5 e4 20. Ng4 Nxg4 21. hxg4
e3 22. Kf1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.28"]
[Round "8"]
[White "Ivkov, Borislav"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "B16"]
[PlyCount "56"]
[EventDate "1966.07.17"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Be2 Bf5 7. Nf3 e6 8.
O-O Bg7 9. c4 O-O 10. Be3 Nd7 11. d5 Bg6 12. Qb3 Qc7 13. Rfd1 c5 14. Nh4 Rad8
15. Rd2 b6 16. Rad1 Rfe8 17. Qa4 Nf8 18. dxe6 Nxe6 19. Rd7 Qe5 20. Nf3 Qxb2 21.
Rxd8 Rxd8 22. Rxd8+ Nxd8 23. Bf1 Ne6 24. Qxa7 Bf8 25. Qb8 Kg7 26. a4 Qb4 27.
Bd2 Qb1 28. a5 bxa5 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.28"]
[Round "8"]
[White "Petrosian, Tigran"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[ECO "A05"]
[PlyCount "171"]
[EventDate "1966.07.17"]

1. Nf3 Nf6 2. g3 g6 3. b4 Bg7 4. Bb2 O-O 5. Bg2 c6 6. O-O a5 7. a3 axb4 8. axb4
Rxa1 9. Bxa1 Qb6 10. c3 d5 11. d3 Nbd7 12. Nbd2 Qc7 13. c4 e5 14. Qc2 Re8 15.
cxd5 Nxd5 16. Rb1 b5 17. e4 N5b6 18. Nb3 Qd6 19. Na5 Nb8 20. h3 Na4 21. Bf1 Bd7
22. Qd1 Qe7 23. d4 exd4 24. Nxd4 Qxe4 25. Bg2 Qe7 26. Ndxc6 Nxc6 27. Nxc6 Bxc6
28. Bxc6 Rd8 29. Qe1 Qxe1+ 30. Rxe1 Bxa1 31. Rxa1 Rd4 32. Bxb5 Nc3 33. Ra8+ Kg7
34. Be8 Rxb4 35. Ra7 Kf8 36. Bxf7 Re4 37. Bb3 Re7 38. Ra1 Re8 39. Ra6 Re7 40.
Kg2 Ne4 41. Bc2 Kg7 42. Rc6 Nf6 43. Rc5 Ne8 44. Bd1 Nf6 45. h4 h6 46. Bc2 Nh7
47. g4 Nf8 48. Kg3 Ra7 49. Be4 Re7 50. f3 Rf7 51. Bd5 Ra7 52. Kf4 Re7 53. Rc6
Rd7 54. Ke4 Re7+ 55. Kd4 Ra7 56. Kc5 Rd7 57. Rb6 Rc7+ 58. Kd4 Re7 59. f4 Nh7
60. Be6 Nf8 61. Bb3 Nh7 62. Bd5 Rc7 63. Ke5 Re7+ 64. Kd6 Ra7 65. Be6 Nf8 66.
Bc8 Rf7 67. f5 gxf5 68. gxf5 Nh7 69. Rb1 Kf6 70. Kd5 Nf8 71. Rb6+ Kg7 72. Ke5
Re7+ 73. Kf4 Rc7 74. Bb7 Rc5 75. Bc6 Ra5 76. h5 Ra4+ 77. Be4 Nh7 78. Ke5 Nf8
79. Rb7+ Kh8 80. Rb8 Ra5+ 81. Bd5 Kg7 82. f6+ Kh7 83. Rb7+ Kh8 84. Rc7 Rb5 85.
Rc8 Kh7 86. Kd6 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.28"]
[Round "8"]
[White "Portisch, Lajos"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "D23"]
[PlyCount "117"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qb3 dxc4 5. Qxc4 Bf5 6. g3 Nbd7 7. Bg2 e6 8.
O-O Be7 9. Nc3 O-O 10. Re1 Ne4 11. Qb3 Qb6 12. Qxb6 axb6 13. Nxe4 Bxe4 14. Ne5
Nxe5 15. Bxe4 Nc4 16. Bd3 b5 17. e3 Rfd8 18. Rd1 Bb4 19. a3 Be7 20. Rb1 e5 21.
a4 exd4 22. exd4 Bf6 23. axb5 Rxd4 24. bxc6 bxc6 25. b3 Na3 26. Rb2 Nb5 27.
Rbd2 Rad8 28. Bc4 Rxd2 29. Rxd2 Rxd2 30. Bxd2 Kf8 31. f4 Nd6 32. Bd3 Bd4+ 33.
Kg2 g6 34. Be2 c5 35. Bf3 Nf5 36. Be2 Ke7 37. Ba5 h5 38. h3 Ne3+ 39. Kf3 f5 40.
Bb6 Nc2 41. Bc4 Nb4 42. Ba5 Kf6 43. Bd8+ Kg7 44. Bc7 Kf6 45. Bd6 Nc6 46. Bf8
Nb4 47. Bh6 Ke7 48. Bg5+ Kf8 49. Bb5 Kf7 50. Bd8 Kg7 51. Be8 Nd3 52. Ba5 Nc1
53. Ba4 Nd3 54. Bd2 Nf2 55. Kg2 Ne4 56. Be1 Bc3 57. Bxc3+ Nxc3 58. Bc6 h4 59.
Bf3 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.28"]
[Round "8"]
[White "Reshevsky, Samuel Herman"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "A96"]
[PlyCount "37"]
[EventDate "1966.07.17"]

1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nf3 Be7 5. O-O O-O 6. c4 d6 7. Nc3 a5 8. Re1
Ne4 9. Qc2 Nc6 10. Nxe4 Nb4 11. Qb1 fxe4 12. Qxe4 e5 13. g4 exd4 14. Nxd4 Bh4
15. Be3 Re8 16. Qf4 Rf8 17. Qe4 Re8 18. Qf4 Rf8 19. Qe4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.28"]
[Round "8"]
[White "Spassky, Boris"]
[Black "Fischer, Robert James"]
[Result "1-0"]
[ECO "D87"]
[PlyCount "99"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8.
Ne2 Nc6 9. Be3 O-O 10. O-O Qc7 11. Rc1 Rd8 12. Qe1 e6 13. f4 Na5 14. Bd3 f5 15.
Rd1 b6 16. Qf2 cxd4 17. Bxd4 Bxd4 18. cxd4 Bb7 19. Ng3 Qf7 20. d5 fxe4 21. dxe6
Qxe6 22. f5 Qf7 23. Bxe4 Rxd1 24. Rxd1 Rf8 25. Bb1 Qf6 26. Qc2 Kh8 27. fxg6
hxg6 28. Qd2 Kg7 29. Rf1 Qe7 30. Qd4+ Rf6 31. Ne4 Bxe4 32. Bxe4 Qc5 33. Qxc5
Rxf1+ 34. Kxf1 bxc5 35. h4 Nc4 36. Ke2 Ne5 37. Ke3 Kf6 38. Kf4 Nf7 39. Ke3 g5
40. h5 Nh6 41. Kd3 Ke5 42. Ba8 Kd6 43. Kc4 g4 44. a4 Ng8 45. a5 Nh6 46. Be4 g3
47. Kb5 Ng8 48. Bb1 Nh6 49. Ka6 Kc6 50. Ba2 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.31"]
[Round "9"]
[White "Donner, Jan"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "E44"]
[PlyCount "50"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 O-O 6. a3 Bxc3+ 7. Nxc3 d5 8. b4
Bb7 9. cxd5 Nxd5 10. Nxd5 Qxd5 11. f3 Qg5 12. Qc2 Rc8 13. e4 Qe7 14. Be3 Nd7
15. Be2 c5 16. dxc5 bxc5 17. b5 a6 18. O-O axb5 19. Bxb5 Ba6 20. a4 h6 21. Qc3
Bxb5 22. axb5 Qd6 23. Rfd1 Rxa1 24. Qxa1 Qc7 25. Qc3 Qb7 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.31"]
[Round "9"]
[White "Fischer, Robert James"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[ECO "B48"]
[PlyCount "79"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Qc7 6. Be3 Nf6 7. Bd3 a6 8.
O-O Ne5 9. h3 b5 10. f4 Nc4 11. Bxc4 Qxc4 12. Qd3 d5 13. e5 Nd7 14. Qxc4 dxc4
15. f5 Nxe5 16. fxe6 Bxe6 17. Rae1 Nd7 18. Nxe6 fxe6 19. Bd4 O-O-O 20. Rxe6 Nc5
21. Rc6+ Kb7 22. Rxc5 Rxd4 23. Rcf5 Bd6 24. Rf7+ Kc6 25. Rxg7 b4 26. Na4 Rd5
27. b3 Be5 28. Re7 c3 29. Re6+ Bd6 30. Re4 Rf8 31. Rxf8 Bxf8 32. Kf2 Bd6 33.
Re2 Rf5+ 34. Ke3 a5 35. Rf2 Re5+ 36. Kf3 Rf5+ 37. Ke2 Re5+ 38. Kf1 h5 39. Re2
Rf5+ 40. Rf2 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.31"]
[Round "9"]
[White "Larsen, Bent"]
[Black "Portisch, Lajos"]
[Result "1-0"]
[ECO "C25"]
[PlyCount "105"]
[EventDate "1966.07.17"]

1. e4 e5 2. Bc4 Bc5 3. Nc3 Nc6 4. Qg4 g6 5. Qf3 Nf6 6. Nge2 d6 7. d3 Bg4 8. Qg3
h6 9. f4 Qe7 10. Nd5 Nxd5 11. Qxg4 Nf6 12. Qh3 Na5 13. Bb5+ c6 14. Ba4 b5 15.
Bb3 d5 16. fxe5 Qxe5 17. c3 Nxb3 18. axb3 Bb6 19. Rf1 Bd8 20. Bf4 Qe6 21. Qxe6+
fxe6 22. Nd4 dxe4 23. Nxc6 Rh7 24. Nxd8 Rxd8 25. Ra6 exd3 26. Bxh6 Rxh6 27.
Rxe6+ Kd7 28. Rfxf6 Rxh2 29. Rd6+ Ke7 30. Rxd8 Kxf6 31. Kf2 Rh1 32. Rxd3 Rb1
33. Rd2 Ke5 34. Kf3 a6 35. b4 Kf5 36. Ke3 Kg4 37. Kd4 Kg3 38. Kc5 g5 39. Kb6
Ra1 40. b3 Rc1 41. Kxa6 Rxc3 42. Rb2 g4 43. Kxb5 Kh2 44. Ka5 Rc8 45. b5 Ra8+
46. Kb4 Rb8 47. Kc5 Rc8+ 48. Kd6 Rb8 49. Kc6 Rc8+ 50. Kb7 Rf8 51. b6 g3 52. Ka6
Rf2 53. Rb1 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.31"]
[Round "9"]
[White "Najdorf, Miguel"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "E54"]
[PlyCount "46"]
[EventDate "1966.07.17"]

1. c4 Nf6 2. d4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O Nbd7 8. a3
dxc4 9. Bxc4 Ba5 10. Bd3 Qe7 11. Ne4 Nxe4 12. Bxe4 Nf6 13. Bc2 cxd4 14. exd4 h6
15. Qd3 Rd8 16. Ne5 Bb6 17. Be3 Bd7 18. Bd2 Bc6 19. Ng4 Ne4 20. Be3 f5 21. Ne5
Bd5 22. Rac1 Rac8 23. Bb3 Rxc1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.07.31"]
[Round "9"]
[White "Unzicker, Wolfgang"]
[Black "Ivkov, Borislav"]
[Result "1-0"]
[ECO "B92"]
[PlyCount "155"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. O-O
O-O 9. Be3 Be6 10. f4 exf4 11. Bxf4 Nc6 12. Kh1 Rc8 13. Qe1 Ne5 14. Rd1 Nfd7
15. Nd4 Qb6 16. Bc1 Rfe8 17. Qg3 Bf8 18. Nf5 Kh8 19. Rxd6 Qa5 20. Rdd1 b5 21.
a3 Bxf5 22. exf5 Bxa3 23. Nxb5 Rxc2 24. Nd4 Rxc1 25. Rxc1 Bxb2 26. Rcd1 Nf6 27.
Qb3 Bc3 28. Bf3 Qc5 29. Rc1 Qxd4 30. Qxc3 Qxc3 31. Rxc3 h5 32. Re3 Nfg4 33.
Bxg4 hxg4 34. f6 gxf6 35. Rxf6 Rb8 36. Kg1 Rb1+ 37. Kf2 Rb2+ 38. Kg3 Kg7 39.
Rxa6 f6 40. Ra5 Nc4 41. Re7+ Kg6 42. Rc5 Nd6 43. Kxg4 Rxg2+ 44. Kh3 Ra2 45.
Rec7 Ne4 46. Rc2 Ra3+ 47. Kg4 Nd6 48. Rg2 Ra4+ 49. Kf3+ Kf5 50. Rc5+ Ke6 51.
Re2+ Kf7 52. Rc7+ Kg6 53. Rg2+ Kf5 54. Rc5+ Ke6 55. Re2+ Kf7 56. Rd5 Nc4 57.
Rf5 Kg6 58. Rf4 Ne5+ 59. Kg3 Ra3+ 60. Kg2 Kg5 61. Ref2 Ra6 62. Rf5+ Kg6 63. h3
Nd3 64. Rf1 Ne5 65. Kh2 Nf7 66. R5f4 Ne5 67. R4f2 Rb6 68. Rg2+ Kf7 69. h4 Ng6
70. h5 Ne5 71. h6 Rb8 72. Rg7+ Ke6 73. h7 Rh8 74. Kg3 f5 75. Rh1 Kf6 76. Rg8
f4+ 77. Kxf4 Ng6+ 78. Ke4 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.01"]
[Round "10"]
[White "Fischer, Robert James"]
[Black "Reshevsky, Samuel Herman"]
[Result "1-0"]
[ECO "C92"]
[PlyCount "75"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
d6 9. h3 Nd7 10. d4 Nb6 11. Nbd2 exd4 12. cxd4 d5 13. Bc2 Be6 14. e5 Qd7 15.
Nb3 Bf5 16. Bg5 Rfe8 17. Bxe7 Rxe7 18. Rc1 Nb4 19. Nc5 Bxc2 20. Qd2 Qe8 21.
Qxb4 a5 22. Qc3 Bg6 23. Nh4 Na4 24. Qb3 Nxc5 25. Rxc5 c6 26. Rec1 Re6 27. f4 f5
28. a4 bxa4 29. Qxa4 Rb8 30. Qa3 Qd8 31. Nxg6 hxg6 32. Rxc6 Rxc6 33. Rxc6 Qh4
34. Rxg6 Kh7 35. Rg5 Rb4 36. Qf3 Kh6 37. g3 Qxh3 38. Qxd5 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.01"]
[Round "10"]
[White "Larsen, Bent"]
[Black "Ivkov, Borislav"]
[Result "1-0"]
[ECO "B08"]
[PlyCount "113"]
[EventDate "1966.07.17"]

1. Nf3 g6 2. e4 Bg7 3. d4 d6 4. Nc3 Nf6 5. Be2 O-O 6. O-O Bg4 7. Be3 Nc6 8. Qd2
e5 9. dxe5 dxe5 10. Rad1 Qxd2 11. Rxd2 Rfd8 12. Rfd1 Rxd2 13. Rxd2 Ne8 14. Nd5
Bxf3 15. gxf3 Nd4 16. Bd1 Ne6 17. c3 Bf8 18. Ba4 c6 19. Nb4 Bc5 20. Nd3 Bxe3
21. fxe3 Rd8 22. Rd1 f6 23. Bb3 N8g7 24. Kf2 Kf8 25. a4 a5 26. Ke2 Ke7 27. Bc4
Nc7 28. b4 Nge8 29. Bb3 Nd6 30. h4 Ra8 31. h5 g5 32. h6 b5 33. axb5 Ndxb5 34.
Rc1 Nd6 35. Ra1 axb4 36. Rxa8 Nxa8 37. Nxb4 Kf8 38. Nxc6 Nf7 39. Nb4 Nb6 40.
Nd5 Nd7 41. Ba4 Nc5 42. Bc6 Nd8 43. Nxf6 Nxc6 44. Nxh7+ Kf7 45. Nxg5+ Kg6 46.
h7 Kg7 47. f4 Nd7 48. Kd3 Na5 49. c4 Nc6 50. Kc3 Nc5 51. f5 Nd7 52. Kb3 Nc5+
53. Ka3 Kh8 54. f6 Nd7 55. f7 Nf8 56. c5 Kg7 57. Ka4 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.01"]
[Round "10"]
[White "Najdorf, Miguel"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "E14"]
[PlyCount "80"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 c5 6. O-O Be7 7. b3 cxd4 8. exd4
d5 9. Bb2 O-O 10. Qe2 Nc6 11. Nbd2 Re8 12. Rad1 Bf8 13. Bb1 Rc8 14. Ne5 dxc4
15. Nxc6 Bxc6 16. bxc4 g6 17. Bd3 Bg7 18. Nf3 Nd7 19. Rfe1 Bb7 20. Qe3 Qc7 21.
Bf1 Red8 22. Ng5 Nf6 23. h3 Ne8 24. Qb3 h6 25. Nf3 Bxf3 26. Qxf3 Nd6 27. Qb3
Nf5 28. d5 exd5 29. Rxd5 Rxd5 30. cxd5 Bxb2 31. Qxb2 Qd6 32. Ba6 Rd8 33. Bc4
Rb8 34. a4 Qf4 35. Bb5 Rd8 36. Bc6 Nd4 37. Qc3 Rc8 38. a5 bxa5 39. Qxa5 Rb8 40.
Qa2 Rb6 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.01"]
[Round "10"]
[White "Spassky, Boris"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[ECO "D27"]
[PlyCount "43"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. dxc5 Bxc5 8.
Qxd8+ Kxd8 9. Nbd2 Nc6 10. Rd1 Ke7 11. Nb3 Bb6 12. Bd2 Rd8 13. Bc3 Bd7 14. Rac1
Be8 15. h3 Rxd1+ 16. Rxd1 Rd8 17. Rxd8 Kxd8 18. Kf1 Ke7 19. Ke2 g6 20. Nfd4
Nxd4+ 21. Bxd4 Bxd4 22. Nxd4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.01"]
[Round "10"]
[White "Unzicker, Wolfgang"]
[Black "Donner, Jan"]
[Result "1/2-1/2"]
[ECO "D19"]
[PlyCount "61"]
[EventDate "1966.07.17"]

1. Nf3 d5 2. c4 c6 3. d4 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O
O-O 9. Qe2 Bg4 10. h3 Bh5 11. Rd1 Nbd7 12. e4 Qe7 13. e5 Nd5 14. Ne4 f5 15.
exf6 gxf6 16. Ng3 Bg6 17. Bh6 Rfe8 18. Bd2 a5 19. Bxb4 axb4 20. Bb3 Ra5 21. Re1
Nf8 22. Qd2 Rea8 23. Rac1 Nb6 24. Ne4 Nxa4 25. Rc4 Rb5 26. Bxa4 Rxa4 27. Nc5
Raa5 28. Rxb4 b6 29. Rxb5 Rxb5 30. Ne4 Rb3 31. Qf4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.03"]
[Round "11"]
[White "Donner, Jan"]
[Black "Larsen, Bent"]
[Result "1-0"]
[ECO "D72"]
[PlyCount "81"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. e4 Nb6 7. Ne2 Nc6 8. d5
Nb8 9. O-O O-O 10. a4 e6 11. Nbc3 exd5 12. exd5 Re8 13. Qb3 c6 14. Be3 Nxd5 15.
Nxd5 cxd5 16. Bxd5 Qe7 17. Nd4 Nd7 18. Rfe1 Nc5 19. Qc4 Bh3 20. Nf3 Ne6 21. Qb3
a5 22. Qxb7 Qxb7 23. Bxb7 Rab8 24. Bc6 Rec8 25. Bb5 Bxb2 26. Ra2 Bc3 27. Rc1
Bd4 28. Rac2 Rxc2 29. Rxc2 Bxe3 30. fxe3 Bf5 31. Rc3 Rd8 32. Kf2 Be4 33. h4 Kg7
34. Ke2 h6 35. Nd2 Bd5 36. Nc4 Rc8 37. Kd3 Nc5+ 38. Kd4 Be4 39. Ra3 f5 40. Nd6
Ne6+ 41. Ke5 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.03"]
[Round "11"]
[White "Ivkov, Borislav"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "E19"]
[PlyCount "39"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2
Nxc3 9. Qxc3 d6 10. Qc2 f5 11. Ne1 Bxg2 12. Nxg2 Qd7 13. Rd1 Nc6 14. Qa4 Ne5
15. Qxd7 Nxd7 16. Nf4 Kf7 17. b3 g5 18. Nd3 Bf6 19. Bb2 a5 20. a3 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.03"]
[Round "11"]
[White "Portisch, Lajos"]
[Black "Fischer, Robert James"]
[Result "0-1"]
[ECO "E45"]
[PlyCount "70"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. Ng3 Bxc3+ 7. bxc3 d5 8.
Qf3 O-O 9. e4 dxe4 10. Nxe4 Nxe4 11. Qxe4 Qd7 12. Ba3 Re8 13. Bd3 f5 14. Qxa8
Nc6 15. Qxe8+ Qxe8 16. O-O Na5 17. Rae1 Bxc4 18. Bxc4 Nxc4 19. Bc1 c5 20. dxc5
bxc5 21. Bf4 h6 22. Re2 g5 23. Be5 Qd8 24. Rfe1 Kf7 25. h3 f4 26. Kh2 a6 27.
Re4 Qd5 28. h4 Ne3 29. R1xe3 fxe3 30. Rxe3 Qxa2 31. Rf3+ Ke8 32. Bg7 Qc4 33.
hxg5 hxg5 34. Rf8+ Kd7 35. Ra8 Kc6 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.03"]
[Round "11"]
[White "Reshevsky, Samuel Herman"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[ECO "B14"]
[PlyCount "44"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 d5 7. O-O dxc4 8. Bxc4
Nbd7 9. Bd3 b6 10. a3 cxd4 11. exd4 Be7 12. Re1 Bb7 13. Bd2 a6 14. Qe2 b5 15.
Rad1 Nb6 16. Bg5 Rc8 17. Ne5 Nbd5 18. Ne4 Nxe4 19. Bxe7 Nxe7 20. Bxe4 Bxe4 21.
Qxe4 Qd5 22. Qxd5 Nxd5 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.03"]
[Round "11"]
[White "Unzicker, Wolfgang"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "B91"]
[PlyCount "43"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. g3 e5 7. Nb3 Be7 8. Bg2
O-O 9. O-O b6 10. Nd5 Nxd5 11. Qxd5 Ra7 12. Be3 Be6 13. Qd3 Nd7 14. Nd2 Qc8 15.
c4 Rc7 16. b3 Nc5 17. Qe2 Qb8 18. Rfc1 Rfc8 19. a4 Qb7 20. Qd1 h6 21. h4 Qb8
22. Rcb1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.04"]
[Round "12"]
[White "Fischer, Robert James"]
[Black "Ivkov, Borislav"]
[Result "1-0"]
[ECO "A08"]
[PlyCount "57"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 d5 5. Nbd2 Bd6 6. Bg2 Nge7 7. O-O O-O 8. Nh4
b6 9. f4 dxe4 10. dxe4 Ba6 11. Re1 c4 12. c3 Na5 13. e5 Bc5+ 14. Kh1 Nd5 15.
Ne4 Bb7 16. Qh5 Ne7 17. g4 Bxe4 18. Bxe4 g6 19. Qh6 Nd5 20. f5 Re8 21. fxg6
fxg6 22. Nxg6 Qd7 23. Nf4 Rad8 24. Nh5 Kh8 25. Nf6 Nxf6 26. exf6 Rg8 27. Bf4
Rxg4 28. Rad1 Rdg8 29. f7 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.04"]
[Round "12"]
[White "Larsen, Bent"]
[Black "Unzicker, Wolfgang"]
[Result "0-1"]
[ECO "A39"]
[PlyCount "80"]
[EventDate "1966.07.17"]

1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. c4 c5 5. Nc3 Nc6 6. d4 cxd4 7. Nxd4 O-O 8.
O-O Nxd4 9. Qxd4 d6 10. Qh4 Qa5 11. Bd2 Be6 12. b3 Rab8 13. Rac1 Rfc8 14. Rc2
Qd8 15. Rfc1 a6 16. Bg5 b5 17. cxb5 axb5 18. Qb4 Qd7 19. h4 h6 20. Bxf6 Bxf6
21. Nd5 Bxd5 22. Bxd5 Rxc2 23. Rxc2 Qa7 24. e3 Kg7 25. h5 gxh5 26. Bf3 h4 27.
gxh4 Qd7 28. Bg4 Qb7 29. Be2 Kh8 30. f3 Qd5 31. Qf4 Rg8+ 32. Kf1 Rg6 33. b4 Qe6
34. Ke1 Rg1+ 35. Kf2 Be5 36. Qe4 Qh3 37. Kxg1 Bh2+ 38. Kh1 Bg3+ 39. Kg1 Qh2+
40. Kf1 Qh1# 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.04"]
[Round "12"]
[White "Najdorf, Miguel"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "D22"]
[PlyCount "75"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. h3 Bh5 6. Bxc4 e6 7. O-O a6 8. Be2
c5 9. Nbd2 Nc6 10. dxc5 Bxc5 11. a3 O-O 12. b4 Ba7 13. Bb2 Qe7 14. Ne5 Nxe5 15.
Bxe5 Bxe2 16. Qxe2 Rfd8 17. Rac1 Rac8 18. Nb3 Nd5 19. e4 Nf6 20. Rfd1 Ne8 21.
Rxc8 Rxc8 22. Bf4 h6 23. Be3 Bxe3 24. Qxe3 Nd6 25. Nc5 a5 26. Qd3 axb4 27. axb4
Ne8 28. e5 b6 29. Na6 Qg5 30. Qd7 Ra8 31. b5 g6 32. Qd4 Ng7 33. Qxb6 Qxe5 34.
Qc6 Rf8 35. b6 Qe2 36. Ra1 Nf5 37. b7 Ne7 38. Qc7 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.04"]
[Round "12"]
[White "Petrosian, Tigran"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "D67"]
[PlyCount "142"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 O-O 6. Rc1 Nbd7 7. e3 c6 8. Bd3
dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. Ne4 N5f6 12. Nxf6+ Qxf6 13. O-O e5 14. e4
exd4 15. Qxd4 Qxd4 16. Nxd4 Ne5 17. Bb3 Rd8 18. Rfd1 Bd7 19. Rc5 Ng6 20. Rc2
Kf8 21. f3 Ke8 22. Kf2 Nf8 23. Ke3 g6 24. f4 Ke7 25. h3 Be6 26. Rdd2 Bxb3 27.
Nxb3 Rxd2 28. Rxd2 b6 29. Nd4 Rc8 30. e5 f6 31. exf6+ Kxf6 32. g4 Re8+ 33. Kf3
Rd8 34. Nb3 Rxd2 35. Nxd2 h6 36. Ne4+ Ke6 37. Ng3 Kf6 38. h4 Ne6 39. h5 Nc5 40.
hxg6 Kxg6 41. Ne4 Nd3 42. b3 Nb4 43. Nc3 Kf6 44. Ke4 Nc2 45. Ne2 Nb4 46. a4 c5
47. Ng3 Kg6 48. Nf5 Nc6 49. Nh4+ Kf6 50. Nf3 Nb4 51. Ne5 Ke6 52. Nc4 Kf6 53.
Nd6 Nc6 54. Kd5 Ne7+ 55. Ke4 Ke6 56. Nc4 Nc6 57. g5 hxg5 58. fxg5 Nb4 59. Ne5
a6 60. g6 Kf6 61. Nd7+ Kxg6 62. Nxb6 Kf7 63. Nd5 a5 64. Nb6 Ke6 65. Nc4 Nc6 66.
Kd3 Kd7 67. Ke3 Ke7 68. Kd3 Kd7 69. Nd2 Ne5+ 70. Kc3 Kc7 71. Ne4 Kc6 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.04"]
[Round "12"]
[White "Spassky, Boris"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "E55"]
[PlyCount "100"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 d5 6. Nf3 O-O 7. O-O dxc4 8. Bxc4
Nbd7 9. Qe2 Qe7 10. a3 Ba5 11. Bd2 Bxc3 12. Bxc3 Ne4 13. Rfc1 Nxc3 14. Rxc3 b6
15. Rac1 cxd4 16. Nxd4 Bb7 17. Bb5 Qd6 18. Bc6 Bxc6 19. Rxc6 Qe5 20. h3 Nf6 21.
R6c2 Nd5 22. Nc6 Qf6 23. Qg4 Ne7 24. Nd4 Rac8 25. Rxc8 Nxc8 26. Qg3 g6 27. Rc7
a5 28. Rc6 h5 29. a4 h4 30. Qg4 Kg7 31. b3 Rd8 32. Qe4 Nd6 33. Qf3 Qxf3 34.
Nxf3 Ne4 35. Nxh4 Rd1+ 36. Kh2 Nxf2 37. Nf3 Rd3 38. Rxb6 Ne4 39. Ne5 Rxe3 40.
Nc4 Rc3 41. Nxa5 Nc5 42. Nb7 Nxb3 43. a5 Nd2 44. a6 Nf1+ 45. Kg1 Ne3 46. Nd6
Ra3 47. Nb5 Ra1+ 48. Kf2 Nc4 49. Rc6 Ne5 50. Rd6 Nc4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.07"]
[Round "13"]
[White "Donner, Jan"]
[Black "Fischer, Robert James"]
[Result "0-1"]
[ECO "E68"]
[PlyCount "56"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4
c6 9. Rb1 a6 10. b4 exd4 11. Nxd4 Re8 12. h3 Ne5 13. Qe2 b5 14. cxb5 cxb5 15.
Rd1 Bb7 16. f4 Nc4 17. Qd3 Rc8 18. Kh2 Qc7 19. Rb3 Re7 20. Re1 Rce8 21. Nc2 Qc8
22. Ne3 Nxe3 23. Rxe3 Nxe4 24. Bxe4 Bxe4 25. Qxd6 Rd7 26. Qc5 Rc7 27. Nxe4 Rxc5
28. Nxc5 Bd4 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.07"]
[Round "13"]
[White "Ivkov, Borislav"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[ECO "E19"]
[PlyCount "59"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Nc3 Ne4 8. Qc2
Nxc3 9. Qxc3 d6 10. Qc2 f5 11. Ne1 Bxg2 12. Nxg2 Qd7 13. b3 Nc6 14. Bb2 e5 15.
dxe5 dxe5 16. Rad1 Qe6 17. Ne3 Rf7 18. Nd5 Bc5 19. a3 a5 20. Kg2 Re8 21. f3 Nd4
22. Bxd4 exd4 23. b4 axb4 24. axb4 Qxe2+ 25. Rf2 Qxc2 26. Rxc2 Bf8 27. Rxd4 c5
28. bxc5 Bxc5 29. Rd1 Ra7 30. Rb2 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.07"]
[Round "13"]
[White "Larsen, Bent"]
[Black "Spassky, Boris"]
[Result "0-1"]
[ECO "D25"]
[PlyCount "86"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Bg4 5. h3 Bh5 6. Nc3 e6 7. Bxc4 Nbd7 8.
O-O Be7 9. e4 O-O 10. Be3 Bg6 11. Bd3 c6 12. a3 Rc8 13. Re1 Bh5 14. Rc1 a5 15.
Be2 Bg6 16. Nd2 Ra8 17. Qb3 Qb8 18. Bf3 h6 19. g3 Rc8 20. Bg2 b5 21. e5 a4 22.
Nxa4 bxa4 23. Qxb8 Raxb8 24. exf6 Nxf6 25. Nc4 Nd5 26. Ne5 Nxe3 27. Rxe3 Rxb2
28. d5 Rc2 29. Rxc2 Bxc2 30. Nxc6 Kf8 31. dxe6 fxe6 32. Nxe7 Kxe7 33. Bd5 e5
34. Be4 Bb3 35. Bb7 Rc1+ 36. Kh2 Ra1 37. Rxe5+ Kd6 38. Re3 Rxa3 39. g4 Ra2 40.
Kg3 Rb2 41. Re1 a3 42. Be4 a2 43. f4 Rd2 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.07"]
[Round "13"]
[White "Portisch, Lajos"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "E45"]
[PlyCount "81"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Nge2 Ba6 6. Ng3 O-O 7. e4 c5 8. d5 d6
9. Be2 exd5 10. exd5 Bxc3+ 11. bxc3 Nbd7 12. O-O Re8 13. Qa4 Bb7 14. Qc2 Ne5
15. Bf4 Ng6 16. Bd2 Bc8 17. Rae1 Bd7 18. f4 h6 19. Bd3 Rxe1 20. Rxe1 Nf8 21.
Nf5 Qc7 22. Qd1 Bxf5 23. Bxf5 Re8 24. Rxe8 Nxe8 25. Qe2 Nf6 26. g4 Ng6 27. g5
Qe7 28. Qd3 hxg5 29. fxg5 Nd7 30. Bxg6 fxg6 31. Qxg6 Qe2 32. Qe6+ Qxe6 33. dxe6
Ne5 34. Bf4 Kf8 35. Bxe5 dxe5 36. Kf2 Ke7 37. Kf3 Kxe6 38. Ke4 g6 39. h3 Kd6
40. Kf3 Ke6 41. Ke4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.07"]
[Round "13"]
[White "Unzicker, Wolfgang"]
[Black "Najdorf, Miguel"]
[Result "1/2-1/2"]
[ECO "B83"]
[PlyCount "95"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 d6 6. Be2 Nf6 7. O-O Be7 8.
Be3 O-O 9. f4 Bd7 10. Qe1 Nxd4 11. Bxd4 Bc6 12. Bd3 Nd7 13. Qg3 e5 14. fxe5 Bh4
15. Qh3 Nxe5 16. Nd5 Bxd5 17. exd5 g6 18. c4 Bf6 19. Kh1 Bg7 20. c5 Rc8 21.
Rac1 dxc5 22. Rxc5 Rxc5 23. Bxc5 Qxd5 24. Bxf8 Nxd3 25. Qf3 Qxf3 26. Rxf3 Ne5
27. Ra3 Bxf8 28. Rxa7 b6 29. Rb7 Bc5 30. b4 Be3 31. a4 Nc6 32. a5 bxa5 33. b5
Ne5 34. b6 Kg7 35. Re7 Kf6 36. b7 Ba7 37. Re8 Nd7 38. Ra8 Bb8 39. Rxa5 Ke6 40.
Ra3 h5 41. Rc3 h4 42. g3 hxg3 43. hxg3 Kd6 44. Rc8 Bc7 45. g4 g5 46. Rg8 f6 47.
Rg7 Kc6 48. Rf7 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.08"]
[Round "14"]
[White "Fischer, Robert James"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C83"]
[PlyCount "126"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5
Be6 9. c3 Be7 10. Bc2 O-O 11. Nbd2 f5 12. Nb3 Qd7 13. Nbd4 Nxd4 14. Nxd4 c5 15.
Ne2 Rad8 16. Nf4 Qc6 17. a4 Bc8 18. axb5 axb5 19. Qh5 g6 20. Qh6 Rf7 21. f3 Bf8
22. Qh3 Ng5 23. Qg3 Ne6 24. h4 Nxf4 25. Bxf4 h5 26. Bg5 Re8 27. f4 Kh7 28. Bd1
Be6 29. Kh2 Ra8 30. Bf3 Rfa7 31. Rxa7+ Rxa7 32. Qf2 Rd7 33. Ra1 c4 34. Ra5 Bc5
35. Qe2 Bf7 36. Kh3 Ra7 37. Rxa7 Bxa7 38. Be7 Qb6 39. Bg5 Qe3 40. Qd1 Qg1 41.
Qxg1 Bxg1 42. Be7 Be3 43. g3 Bc1 44. Ba3 Kg7 45. Kg2 d4 46. cxd4 c3 47. bxc3
Bxa3 48. d5 Kf8 49. Kf2 Ke7 50. Ke2 Bc5 51. Ke1 Kd8 52. d6 Kd7 53. Bb7 Bc4 54.
Bg2 Bb6 55. Bb7 Ba5 56. Kd2 Bb6 57. Ke1 Be3 58. Bf3 Ke6 59. Bb7 Kd7 60. Bf3 Bf7
61. Ke2 Ba7 62. Ba8 Bc4+ 63. Ke1 Be6 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.08"]
[Round "14"]
[White "Najdorf, Miguel"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "E74"]
[PlyCount "100"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 h6 7. Be3 c5 8. d5 e6
9. Qd2 exd5 10. exd5 Kh7 11. h3 Bf5 12. g4 Bd7 13. Nf3 Re8 14. Bd3 Na6 15. Kf1
b5 16. g5 hxg5 17. cxb5 Nb4 18. Be2 a6 19. bxa6 Kg8 20. a3 Nxa6 21. Nxg5 Nc7
22. Bf4 Bf5 23. Bf3 Rb8 24. Rd1 Qd7 25. Kg2 Rb3 26. Qc1 Reb8 27. Bg3 Rxb2 28.
Qf4 Nce8 29. Nce4 Nxe4 30. Bxe4 Bxe4+ 31. Qxe4 Nf6 32. Qf4 R8b6 33. Rhe1 Nh5
34. Qg4 Qxg4 35. Re8+ Bf8 36. hxg4 Nxg3 37. Kxg3 Rb8 38. Rde1 Kg7 39. a4 R2b7
40. Rxb8 Rxb8 41. Ra1 Be7 42. Ne4 Bf6 43. Ra2 c4 44. Nxf6 Kxf6 45. Kf4 c3 46.
g5+ Ke7 47. Ke3 Rc8 48. Rc2 Rc4 49. a5 Kd7 50. Kd3 Ra4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.08"]
[Round "14"]
[White "Petrosian, Tigran"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "A07"]
[PlyCount "109"]
[EventDate "1966.07.17"]

1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. O-O e5 5. d3 Ne7 6. Nbd2 O-O 7. e4 c5 8. exd5
Nxd5 9. Nb3 Nd7 10. Re1 Rb8 11. Nfd2 Nc7 12. Na5 Ne6 13. Nac4 Qc7 14. Ne4 Nb6
15. Nc3 Bd7 16. a4 Bc6 17. Nb5 Bxb5 18. axb5 Nxc4 19. dxc4 b6 20. c3 Rfe8 21.
Ra6 Re7 22. Qa4 Rc8 23. Bd5 Qb8 24. Bxe6 fxe6 25. Qd1 Rd8 26. Qg4 Ree8 27. h4
Rd7 28. h5 gxh5 29. Qxh5 Rf8 30. Qg4 Rf6 31. Be3 Rg6 32. Qe4 Bf8 33. Raa1 Bd6
34. Red1 Rgg7 35. Rd2 Bf8 36. Rxd7 Rxd7 37. Qg4+ Kf7 38. Qh3 Kf6 39. Rf1 Qe8
40. Qh4+ Kg7 41. Bh6+ Kg8 42. Bxf8 Kxf8 43. Re1 Qf7 44. Rxe5 Qg6 45. Kg2 Qf7
46. Re4 Ke8 47. Rf4 Qe7 48. Qh5+ Kd8 49. Qe5 Kc8 50. Qe4 Kb8 51. Rh4 Qf7 52.
Rf4 Qe7 53. Qf3 Qd6 54. Rf8+ Rd8 55. Rf6 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.08"]
[Round "14"]
[White "Reshevsky, Samuel Herman"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "B08"]
[PlyCount "103"]
[EventDate "1966.07.17"]

1. d4 g6 2. e4 Bg7 3. Nf3 d6 4. Be2 Nf6 5. Nc3 O-O 6. O-O Bg4 7. Be3 Nc6 8. Qd2
e5 9. dxe5 dxe5 10. Rfd1 Qxd2 11. Rxd2 Rfd8 12. Rad1 Rxd2 13. Rxd2 Ne8 14. Nd5
Bxf3 15. gxf3 Nd4 16. Bd1 Ne6 17. c3 Bf8 18. Ba4 Kg7 19. Nb4 Nc5 20. Bc2 a5 21.
Nd5 Ra6 22. b4 axb4 23. cxb4 Ne6 24. Bb3 Rd6 25. Kg2 Nf6 26. b5 Nh5 27. Kf1 c6
28. bxc6 Rxc6 29. Rc2 Rxc2 30. Bxc2 Bc5 31. Bd2 Nhf4 32. Be3 Bxe3 33. fxe3 Nxd5
34. exd5 Nc5 35. Ke2 f5 36. Kd2 Kf6 37. Kc3 Ke7 38. Kc4 Kd6 39. e4 fxe4 40.
Bxe4 Nd7 41. Kb5 Nf6 42. a4 g5 43. a5 g4 44. Kb6 gxf3 45. Bxf3 e4 46. Bg2 e3
47. Bf3 Nxd5+ 48. Kxb7 Nb4 49. Kb6 Nd5+ 50. Kb7 Nb4 51. Kb6 Nd5+ 52. Kb7
1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.08"]
[Round "14"]
[White "Spassky, Boris"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "C93"]
[PlyCount "46"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 h6 10. d4 Re8 11. Be3 Bf8 12. Nbd2 Bb7 13. dxe5 Nxe5 14. Nxe5 dxe5
15. Qf3 c5 16. c4 Qe7 17. a4 b4 18. a5 Red8 19. Bc2 Rac8 20. Red1 Nh7 21. Nf1
Qe6 22. b3 Be7 23. Qf5 Nf8 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.10"]
[Round "15"]
[White "Donner, Jan"]
[Black "Reshevsky, Samuel Herman"]
[Result "1/2-1/2"]
[ECO "E69"]
[PlyCount "82"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7 7. O-O e5 8. e4
c6 9. Rb1 a6 10. h3 Re8 11. Be3 b5 12. c5 b4 13. Ne2 Nxe4 14. cxd6 Nxd6 15.
Nxe5 Nxe5 16. dxe5 Bxe5 17. Rc1 Bb7 18. Nd4 Qd7 19. Qb3 c5 20. Nf3 Ne4 21. Rfd1
Qb5 22. Nxe5 Rxe5 23. Bf4 Re6 24. Qd3 Rae8 25. Qxb5 axb5 26. f3 g5 27. fxe4
gxf4 28. Rxc5 Bxe4 29. Rxb5 Bxg2 30. Kxg2 Re2+ 31. Kf3 fxg3 32. Kxg3 R8e3+ 33.
Kf4 Rxh3 34. Rg1+ Kf8 35. Rxb4 Rf2+ 36. Ke5 Re3+ 37. Kd5 Rd2+ 38. Kc6 Ree2 39.
Rb1 h5 40. a4 Rc2+ 41. Kb6 h4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.10"]
[Round "15"]
[White "Ivkov, Borislav"]
[Black "Portisch, Lajos"]
[Result "0-1"]
[ECO "C49"]
[PlyCount "146"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8.
bxc3 Qe7 9. Re1 Nd8 10. d4 Bg4 11. h3 Bh5 12. g4 Bg6 13. Bh4 h5 14. Nh2 c6 15.
Bc4 Ne6 16. gxh5 Bh7 17. Ng4 Nf4 18. Re3 N4xh5 19. Rf3 Kh8 20. Qc1 Rg8 21. Kf1
exd4 22. Bd3 Qe6 23. Nxf6 Nxf6 24. Bxf6 gxf6 25. cxd4 Rg5 26. Qe3 c5 27. c3
Rag8 28. Ke2 cxd4 29. Qxd4 Re5 30. Kd2 d5 31. exd5 Rxd5 32. Qh4 Qe4 33. Qxe4
Bxe4 34. Re3 Rgd8 35. Rxe4 Rxd3+ 36. Ke2 Kg7 37. Re3 Rd2+ 38. Kf3 Rc2 39. Rb1
b6 40. Rb4 Rdd2 41. Rg4+ Kf8 42. Rg2 Rxa2 43. h4 Ra5 44. Rh2 Rf5+ 45. Kg3 Kg7
46. Rg2 Rc5 47. Kh3+ Kf8 48. Rf3 Ke7 49. Rg4 b5 50. Re4+ Re5 51. Rd4 Rxd4 52.
cxd4 Rd5 53. Ra3 Rd7 54. h5 Kf8 55. Ra5 Rb7 56. d5 b4 57. d6 b3 58. Ra1 a5 59.
h6 b2 60. Rb1 Kg8 61. d7 Rxd7 62. Rxb2 Ra7 63. Ra2 a4 64. Ra3 Kh7 65. Kg4 Ra5
66. Kf4 Kxh6 67. Rh3+ Kg7 68. Ra3 Kf8 69. Ke4 Ke7 70. Kd4 Kd6 71. f3 Ra8 72.
Kc4 Ke5 73. Kd3 Kf4 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.10"]
[Round "15"]
[White "Larsen, Bent"]
[Black "Fischer, Robert James"]
[Result "0-1"]
[ECO "A72"]
[PlyCount "86"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 c5 7. d5 e6 8. Nf3 h6
9. Bh4 exd5 10. cxd5 g5 11. Bg3 Nh5 12. Nd2 Nxg3 13. hxg3 Nd7 14. Nc4 Qe7 15.
Ne3 Nf6 16. Qc2 Re8 17. Bb5 Rd8 18. Be2 Re8 19. f3 Nh7 20. g4 Nf8 21. a4 Ng6
22. Kf1 Rb8 23. Bb5 Rd8 24. Nf5 Bxf5 25. exf5 Ne5 26. Ne4 a6 27. Be2 Nd7 28.
Re1 Nf6 29. Nc3 Qd7 30. a5 Re8 31. Kf2 Qc7 32. Ra1 c4 33. Kg3 Re3 34. Qd2 Rbe8
35. Rhe1 h5 36. Bf1 Nxg4 37. Rxe3 Rxe3 38. Kh3 Qe7 39. g3 Bxc3 40. bxc3 Rxf3
41. Re1 Re3 42. Rxe3 Qxe3 43. Qxe3 Nxe3 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.10"]
[Round "15"]
[White "Najdorf, Miguel"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "D59"]
[PlyCount "42"]
[EventDate "1966.07.17"]

1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. Rc1
Bb7 9. cxd5 Nxd5 10. Nxd5 Bxd5 11. Bxe7 Qxe7 12. Be2 Rc8 13. O-O c5 14. Qa4 Nd7
15. Qa3 Kf8 16. Ba6 Bxf3 17. gxf3 Qg5+ 18. Kh1 Qh5 19. Bxc8 Qxf3+ 20. Kg1 Qg4+
21. Kh1 Qf3+ 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.10"]
[Round "15"]
[White "Unzicker, Wolfgang"]
[Black "Petrosian, Tigran"]
[Result "1/2-1/2"]
[ECO "B92"]
[PlyCount "45"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Nf6 6. Be2 e5 7. Nb3 Be7 8. O-O
O-O 9. Be3 Qc7 10. a4 Be6 11. a5 Qc6 12. Bf3 Rc8 13. Re1 Nbd7 14. Re2 Qc7 15.
Rd2 h6 16. Be2 Nc5 17. f3 Rd8 18. Kh1 Ne8 19. Nxc5 dxc5 20. Nd5 Bxd5 21. Rxd5
Nf6 22. Rxd8+ Rxd8 23. Qe1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.11"]
[Round "16"]
[White "Fischer, Robert James"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[ECO "B44"]
[PlyCount "93"]
[EventDate "1966.07.17"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nb5 d6 6. Bf4 e5 7. Be3 Nf6 8. Bg5
Be6 9. N1c3 a6 10. Bxf6 gxf6 11. Na3 Nd4 12. Bc4 b5 13. Bxe6 fxe6 14. Ne2 Nc6
15. Ng3 Qd7 16. c4 Nd4 17. O-O b4 18. Nc2 Nxc2 19. Qxc2 h5 20. Rfd1 h4 21. Nf1
Rg8 22. a3 h3 23. g3 bxa3 24. Rxa3 Qc6 25. Qe2 f5 26. c5 Qxe4 27. Qxe4 fxe4 28.
cxd6 Bh6 29. Ra5 Kd7 30. Rxe5 Bg7 31. Rxe4 Bxb2 32. Ne3 a5 33. Nc4 Rgb8 34. Rh4
Kc6 35. Rh7 Bd4 36. Rc7+ Kd5 37. d7 a4 38. Nb6+ Rxb6 39. Rc8 Rd6 40. Rxa8 Rxd7
41. Rxa4 e5 42. Kf1 Rb7 43. f4 Ke6 44. fxe5 Rf7+ 45. Ke2 Rf2+ 46. Kd3 Bxe5 47.
Re1 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.11"]
[Round "16"]
[White "Petrosian, Tigran"]
[Black "Larsen, Bent"]
[Result "0-1"]
[ECO "E61"]
[PlyCount "122"]
[EventDate "1966.07.17"]

1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. e3 c6 7. Nge2 a5 8. b3 Na6
9. O-O e5 10. Bb2 Re8 11. a3 Rb8 12. h3 h5 13. Qc2 Be6 14. Kh2 Qc7 15. Rac1 b5
16. cxb5 cxb5 17. Qd1 Qe7 18. Nb1 Bd7 19. Nd2 e4 20. Nf4 d5 21. Qe2 Qd6 22. Rc2
Rec8 23. Rfc1 Rxc2 24. Rxc2 h4 25. Nf1 hxg3+ 26. fxg3 b4 27. a4 Rc8 28. Rxc8+
Bxc8 29. h4 Nc7 30. Bh3 Bxh3 31. Nxh3 Bf8 32. Kg2 Qc6 33. Qd1 Bd6 34. Nf2 Ne6
35. Bc1 Ng7 36. Bd2 Nf5 37. Kh3 Qc8 38. Kg2 Kg7 39. Nh1 Nh6 40. Be1 Qa6 41. Nf2
Nf5 42. Qd2 Bb8 43. Nd1 Ng4 44. Kg1 f6 45. Kg2 g5 46. Nf2 Ngh6 47. hxg5 fxg5
48. Nd1 Kg6 49. Nh2 g4 50. Qc2 Bd6 51. Nf1 Ng8 52. Nh2 Nf6 53. Nf1 Kh5 54. Nh2
Kg5 55. Nf1 Nh5 56. Bf2 Nf6 57. Be1 Nh5 58. Bf2 Qa8 59. Be1 Qh8 60. Qc6 Bxg3
61. Bxg3 Nhxg3 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.11"]
[Round "16"]
[White "Portisch, Lajos"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "D33"]
[PlyCount "37"]
[EventDate "1966.07.17"]

1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bb4 7. Bg2 O-O 8.
O-O d5 9. cxd5 exd5 10. Be3 Re8 11. Rc1 Bg4 12. Qb3 Bxc3 13. Rxc3 Nxd4 14. Bxd4
Bxe2 15. Rfc1 Ne4 16. Rc7 Ba6 17. Qf3 Ng5 18. Qf5 Bc4 19. Rxb7 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.11"]
[Round "16"]
[White "Reshevsky, Samuel Herman"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "E55"]
[PlyCount "81"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O dxc4 8. Bxc4
Nbd7 9. Qe2 a6 10. a3 cxd4 11. exd4 Bxc3 12. bxc3 b5 13. Bd3 Nb6 14. Ne5 Bb7
15. Bg5 Nbd5 16. Rac1 h6 17. Bd2 Ne7 18. f3 Nd7 19. f4 Nf5 20. Be1 Rc8 21. Rb1
Bd5 22. Bd2 Nd6 23. a4 f5 24. axb5 axb5 25. Rfc1 Be4 26. Bxe4 fxe4 27. Qg4 Re8
28. Ra1 Nf6 29. Qg6 Rc7 30. Ra6 Nf5 31. Rca1 Nh4 32. Qg3 Nf5 33. Qe1 Qd5 34. g4
Nd6 35. g5 hxg5 36. fxg5 Nd7 37. Bf4 Nf5 38. Ra7 Rxa7 39. Rxa7 Nxe5 40. Bxe5
Ra8 41. Qa1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.11"]
[Round "16"]
[White "Spassky, Boris"]
[Black "Ivkov, Borislav"]
[Result "1/2-1/2"]
[ECO "E66"]
[PlyCount "60"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 8. d5
Na5 9. Nd2 c5 10. Qc2 Rb8 11. b3 b5 12. Bb2 e6 13. Rab1 Re8 14. e4 Bd7 15. Rfe1
Bh6 16. dxe6 Bxe6 17. Nd5 Bg7 18. Nxf6+ Bxf6 19. Bxf6 Qxf6 20. e5 Bf5 21. exf6
Bxc2 22. Rbc1 Bf5 23. Bd5 h6 24. Ne4 Bxe4 25. Rxe4 Rxe4 26. Bxe4 Rc8 27. Kf1
Nc6 28. Re1 bxc4 29. bxc4 Ne5 30. Bd5 Rf8 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.14"]
[Round "17"]
[White "Donner, Jan"]
[Black "Ivkov, Borislav"]
[Result "0-1"]
[ECO "A42"]
[PlyCount "70"]
[EventDate "1966.07.17"]

1. d4 g6 2. e4 Bg7 3. c4 d6 4. Nc3 e5 5. Nge2 Nc6 6. d5 Nce7 7. g3 f5 8. Bg2
Nf6 9. f3 O-O 10. O-O c6 11. Kh1 cxd5 12. cxd5 Qb6 13. Qb3 Qxb3 14. axb3 Bd7
15. Be3 a6 16. h3 Rac8 17. Rac1 h5 18. Rc2 Kh7 19. Rfc1 Bh6 20. Bxh6 Kxh6 21.
Na4 Rxc2 22. Rxc2 Rc8 23. Rxc8 Nxc8 24. Kg1 b5 25. Nac3 b4 26. Nb1 Bb5 27. Nc1
Nb6 28. Kf2 Nbd7 29. Ke3 Nc5 30. Nd2 a5 31. f4 fxe4 32. Bxe4 exf4+ 33. Kxf4
Ncxe4 34. Nxe4 Nxe4 35. Kxe4 g5 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.14"]
[Round "17"]
[White "Fischer, Robert James"]
[Black "Spassky, Boris"]
[Result "1/2-1/2"]
[ECO "C89"]
[PlyCount "69"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. g3 Nf6 13. d4 Bd6 14. Re1 Bg4 15.
Qd3 c5 16. dxc5 Bxc5 17. Qxd8 Raxd8 18. Bf4 h6 19. Na3 g5 20. Be3 Bxe3 21. Rxe3
Rd2 22. Nc2 Re8 23. Rxe8+ Nxe8 24. Ne3 Bf3 25. Bc2 Nd6 26. b3 Kf8 27. a4 Ne4
28. Bxe4 Bxe4 29. axb5 axb5 30. b4 Rb2 31. g4 Kg7 32. Kf1 Kf6 33. Ra5 Rb1+ 34.
Ke2 Rb2+ 35. Kf1 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.14"]
[Round "17"]
[White "Larsen, Bent"]
[Black "Reshevsky, Samuel Herman"]
[Result "1-0"]
[ECO "E70"]
[PlyCount "89"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 c5 3. d5 d6 4. Nc3 g6 5. e4 Bg7 6. Bg5 h6 7. Bf4 O-O 8. h3 Re8
9. Bd3 e6 10. Nge2 exd5 11. exd5 a6 12. O-O Qe7 13. Qd2 Qf8 14. a4 Nbd7 15. b3
Nh5 16. Bh2 Ne5 17. Bc2 f5 18. a5 Nf7 19. Rab1 Bd7 20. b4 Rac8 21. Na4 Bxa4 22.
Bxa4 Re7 23. Rfc1 g5 24. bxc5 Rxc5 25. g4 fxg4 26. hxg4 Ne5 27. Bxe5 Bxe5 28.
gxh5 Qf3 29. Qc2 Bh2+ 30. Kxh2 Qxf2+ 31. Kh1 Qf3+ 32. Kg1 Re4 33. Nf4 Qxf4 34.
Qf2 Qg4+ 35. Qg2 Qh4 36. Bd7 Rcxc4 37. Rxc4 Rxc4 38. Be6+ Kf8 39. Rf1+ Ke8 40.
Qf2 Qxf2+ 41. Rxf2 Ra4 42. Rf6 Rxa5 43. Rxh6 b5 44. Rg6 Ra4 45. Rg8+ 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.14"]
[Round "17"]
[White "Najdorf, Miguel"]
[Black "Petrosian, Tigran"]
[Result "0-1"]
[ECO "E64"]
[PlyCount "148"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 g6 3. g3 c5 4. d5 d6 5. Nc3 Bg7 6. Bg2 O-O 7. Nf3 Na6 8. O-O
Nc7 9. a4 Rb8 10. h3 b6 11. e4 a6 12. e5 Nd7 13. exd6 exd6 14. Bg5 f6 15. Bf4
Ne8 16. h4 Ne5 17. Nd2 Nf7 18. Re1 g5 19. hxg5 fxg5 20. Be3 Ne5 21. Nce4 h6 22.
Ra3 Ng4 23. Qc1 Rb7 24. Bf3 Rbf7 25. Bxg4 Bxg4 26. Qb1 a5 27. Qc1 Be5 28. Kg2
Qd7 29. Rh1 Qf5 30. Bxg5 hxg5 31. f3 Nf6 32. fxg4 Qxg4 33. Qd1 Qxd1 34. Rxd1
Nxe4 35. Nxe4 g4 36. Rd2 Bd4 37. Ra1 Re7 38. Nf2 Re3 39. Nxg4 Rb3 40. Nh2 Rb4
41. Re1 Rxc4 42. Re6 Rxa4 43. Rxd6 Rb4 44. Rc6 a4 45. d6 Kf7 46. Nf3 Ke6 47.
Nxd4+ cxd4 48. d7+ Kxd7 49. Rh6 Rf5 50. g4 Rd5 51. Kf3 d3 52. Rf6 b5 53. Rf4
Rc4 54. Re4 Kc6 55. Ke3 Rc2 56. g5 Rc1 57. Rg4 Re1+ 58. Kf2 Re8 59. g6 Kc5 60.
g7 Rdd8 61. Kf3 b4 62. Kf2 Kb5 63. Kf3 a3 64. bxa3 bxa3 65. Kf2 Rg8 66. Ke3 Rd7
67. Rxd3 Rxd3+ 68. Kxd3 a2 69. Rg1 Rxg7 70. Ra1 Rg2 71. Kc3 Ka4 72. Rh1 Ka3 73.
Rf1 Rg8 74. Rh1 Rc8+ 0-1

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.14"]
[Round "17"]
[White "Unzicker, Wolfgang"]
[Black "Portisch, Lajos"]
[Result "1/2-1/2"]
[ECO "C95"]
[PlyCount "42"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3
O-O 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 Bb7 12. Bc2 Re8 13. Nf1 Bf8 14. Ng3 g6 15.
Bd2 Bg7 16. Qc1 d5 17. Bg5 Qc8 18. dxe5 Nxe4 19. Nxe4 dxe4 20. Bxe4 Nxe5 21.
Bxb7 Qxb7 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.15"]
[Round "18"]
[White "Ivkov, Borislav"]
[Black "Unzicker, Wolfgang"]
[Result "1/2-1/2"]
[ECO "C49"]
[PlyCount "60"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8.
bxc3 Qe7 9. Re1 Nd8 10. d4 Bg4 11. h3 Bh5 12. g4 Bg6 13. Bh4 Ne6 14. dxe5 dxe5
15. Nxe5 Qc5 16. Nxg6 hxg6 17. Rb1 g5 18. Bg3 Qxc3 19. Qd3 Qc5 20. Qe3 Qxe3 21.
Rxe3 Rfd8 22. Bc4 b6 23. Bxe6 fxe6 24. Bxc7 Rdc8 25. Be5 Rxc2 26. Bxf6 gxf6 27.
Ra3 Re2 28. Ra4 Kf7 29. Kg2 Kg6 30. Kg3 Rc8 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.15"]
[Round "18"]
[White "Petrosian, Tigran"]
[Black "Fischer, Robert James"]
[Result "1/2-1/2"]
[ECO "E62"]
[PlyCount "56"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. c4 Nc6 7. Nc3 Bf5 8. h3
e5 9. d5 Ne7 10. Ne1 Bc8 11. e4 Nd7 12. Nd3 f5 13. Bd2 Nf6 14. Kh2 c6 15. f3
Kh8 16. Rc1 b5 17. cxb5 cxd5 18. exd5 Nfxd5 19. Nxd5 Nxd5 20. Nb4 Be6 21. Nxd5
Bxd5 22. Bb4 Bxa2 23. Rc6 Bg8 24. Bxd6 Re8 25. Re1 Rc8 26. Bb4 Rb8 27. Qxd8
Rexd8 28. Bc3 e4 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.15"]
[Round "18"]
[White "Portisch, Lajos"]
[Black "Larsen, Bent"]
[Result "1/2-1/2"]
[ECO "A30"]
[PlyCount "63"]
[EventDate "1966.07.17"]

1. c4 Nf6 2. Nc3 c5 3. Nf3 e6 4. g3 b6 5. Bg2 Bb7 6. O-O Be7 7. d4 cxd4 8. Qxd4
Nc6 9. Qf4 O-O 10. Rd1 d6 11. b3 Qb8 12. Bb2 a6 13. e4 Rd8 14. h3 b5 15. cxb5
axb5 16. Nxb5 Nxe4 17. Qxe4 Ne5 18. Qf4 Bxf3 19. Nxd6 Bxd1 20. Bxe5 Bxd6 21.
Bxd6 Rxd6 22. Bxa8 h5 23. Be4 Qd8 24. Rc1 f5 25. Bb7 Kh7 26. h4 Bg4 27. Bg2 Rd2
28. Rc7 Re2 29. Ra7 e5 30. Qb4 Qd1+ 31. Kh2 Qd4 32. Rxg7+ 1/2-1/2

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.15"]
[Round "18"]
[White "Reshevsky, Samuel Herman"]
[Black "Najdorf, Miguel"]
[Result "1-0"]
[ECO "E43"]
[PlyCount "107"]
[EventDate "1966.07.17"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 O-O 6. Nf3 b6 7. O-O Bb7 8. Na4
cxd4 9. exd4 Be7 10. Re1 d6 11. b4 Nbd7 12. Bb2 Re8 13. Nc3 g6 14. d5 exd5 15.
cxd5 a6 16. a4 Bf8 17. Rxe8 Qxe8 18. Qb3 Bg7 19. Re1 Qf8 20. Nd4 Re8 21. Rd1
Bh8 22. Be2 Qh6 23. Bc1 Qh4 24. Nf3 Qh5 25. h3 h6 26. Be3 Rxe3 27. fxe3 Ne5 28.
Qc2 Nxf3+ 29. Bxf3 Qe5 30. Qd3 Nd7 31. Ne2 a5 32. Qe4 axb4 33. Rb1 Qxe4 34.
Bxe4 Bc3 35. Nxc3 bxc3 36. Bc2 Bxd5 37. Rd1 Bc6 38. Rxd6 Ne5 39. Rd4 Kf8 40. e4
Ke7 41. Kf2 Bd7 42. Rb4 Nc6 43. Rc4 Kd6 44. Rxc3 g5 45. Rd3+ Ke7 46. Bd1 Na5
47. Rd2 Nc4 48. Rd4 Ne5 49. Ke3 f6 50. Rb4 Kd8 51. Be2 Kc7 52. Bb5 Be6 53. Rd4
Bd7 54. Rd1 1-0

[Event "Piatigorsky Cup it"]
[Site "Santa Monica USA"]
[Date "1966.08.15"]
[Round "18"]
[White "Spassky, Boris"]
[Black "Donner, Jan"]
[Result "1-0"]
[ECO "C86"]
[PlyCount "69"]
[EventDate "1966.07.17"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Be7 7. O-O O-O 8. c3
d5 9. d3 d4 10. Rd1 Be6 11. Nbd2 Re8 12. Bxe6 fxe6 13. Nb3 dxc3 14. bxc3 Bd6
15. d4 Nd7 16. Bg5 Qc8 17. c4 Nxd4 18. Nbxd4 exd4 19. e5 Bf8 20. Rxd4 c6 21.
Rh4 Be7 22. Bxe7 Rxe7 23. Ng5 h6 24. Ne4 Qc7 25. Nd6 Rd8 26. Rd1 Qb6 27. Rhd4
Rf8 28. Kh1 Qc5 29. f4 Nb6 30. Ne4 Qa3 31. Qg4 bxc4 32. Nf6+ Kh8 33. Rd8 Rc7
34. Qg6 gxf6 35. Qxf6+ 1-0
