Botvinnik Variation: Ivanchuk-Shirov with 21.Qg7

One of the latest wonderful games was ...

Ivanchuk Vassily - Shirov Alexei
1996, Wijk aan Zee
1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 dc 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Ng5 hg 10. Bg5 Nbd7 11. ef Bb7 12. g3 c5 13. d5 Qb6 14. Bg2 O-O-O 15. O-O b4

16. Na4 Qb5 17. a3 ed 18. ab cb 19. Be3 Nc5 20. Qg4 Rd7 21. Qg7 {! Ivanchuk/!! Shirov} 21...Bg7 22. fg Rg8 23. Nc5 d4 {? Ivanchuk} 24. Bb7 Rb7 25. Nb7 Qb6 26. Bd4 {!! Shirov} 26... Qd4 27. Rfd1 27... Qb2 28. Nd6 Kb8 29. Rdb1 Qg7 {? Shirov} 30. Rb4 Kc7 31. Ra6 {! +- Shirov} Rb8 32. Ra7 [32.Rb7?? Rb7 33.Ne8 Kb8 34.Ng7 c3 -+] 32... Kd6 33. Rb8 Qg4 34. Rd8 Kc6 35. Ra1 1:0

However, the comments of both adversaries do not confirm a clear advantage of White after the queen is sacrificed. Incidentally, it is interesting to mention the game where White choose the other way (the full text has been presented by P.Golovenchenko, Odessa):

Golovenchenko P.E. - Kurotjka A.P
1991, cr 17ch-UKR sf
1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dc 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Ng5 hg 10. Bg5 Nbd7 11. ef Bb7 12. g3 c5 13. d5 Qb6 14. Bg2 O-O-O 15. O-O b4 16. Na4 Qb5 17. a3 ed 18. ab cb 19. Be3 Nc5 20. Qg4 Rd7 21. Nc5 !? [21.Bc5 Bc5 22.Qg7 Rhd8 23.Nc5 Qc5 24.Bh3 Kc7 (24...d4!?) 25.Bd7 Rd7 Ivanchuk] 21... Bc5 22. Qg7 [22.Bc5 Qc5] 22... Rhd8 23. Bh3 d4 [23...Be3 24.fe d4 25.Qf7 de (25...Qc6 26.Bd7 Rd7 27.Qe8 Kc7 28.e4+-) 26.Bd7 Rd7 27.Qe8 Kc7 28.Rad1!] 24. Bf4 Qc6 25. f3 d3 26. Kg2 Qd5 27. Ra5 Bc6? [27...c3 28.bc bc 29.Rc5 (29.Be3 Be3! 30.Rd5 Bd5 31.Bd7 Rd7) Qc5 30.Qf7] 28. Rc5! [28.Be3 Be3] 28... Qc5 29. Qf7 Qd4 [29...c3 30.bc bc 31.Qb3!] 30. Bd7 Bd7 31. Rc1! +- 1:0

More annotations! (zipped cbv)
NiC YB/39 info (Link)