| 1st IBM chess tournament :: Amsterdam 1961 |
[ Competition summary || Crosstable || 1st | 2nd | 3rd | 4th | 5th | 6th | 7th | 8th | 9th | 10th | 11th || Information ] >>
| pos. | name | flag | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | pts | + | = | - |
| 1. | Langeweg, Christian | ● | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 | 9 | 0 | 2 | |
| 2. | GM Donner, Jan | 1 | ● | ½ | 1 | 0 | ½ | 1 | 1 | ½ | 1 | 1 | 1 | 8½ | 7 | 3 | 1 | |
| 3. | IM Enevoldsen, Jens | 0 | ½ | ● | ½ | 1 | 1 | 0 | 1 | ½ | 1 | ½ | 1 | 7 | 5 | 4 | 2 | |
| 4. | IM Wade, Robert Graham | 0 | 0 | ½ | ● | 0 | ½ | 1 | 1 | ½ | 1 | 1 | 1 | 6½ | 5 | 3 | 3 | |
| 5. | Hiong Liong Tan | 1 | 1 | 0 | 1 | ● | ½ | 0 | ½ | 0 | 1 | ½ | ½ | 6 | 4 | 4 | 3 | |
| 6.-8. | Van den Berg, Carel | 0 | ½ | 0 | ½ | ½ | ● | 1 | 0 | 1 | 0 | ½ | 1 | 5 | 3 | 4 | 4 | |
| 6.-8. | Kuijpers, Franciscus | 0 | 0 | 1 | 0 | 1 | 0 | ● | 0 | 1 | 0 | 1 | 1 | 5 | 5 | 0 | 6 | |
| 6.-8. | IM Johner, Hans | 0 | 0 | 0 | 0 | ½ | 1 | 1 | ● | ½ | 1 | 0 | 1 | 5 | 4 | 2 | 5 | |
| 9.-10. | Crabbendam, Henrico | 0 | ½ | ½ | ½ | 1 | 0 | 0 | ½ | ● | 0 | 1 | ½ | 4½ | 2 | 5 | 4 | |
| 9.-10. | De Rooi, Paul | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | ● | ½ | 1 | 4½ | 4 | 1 | 6 | |
| 11. | Wolthuis, Willem | 0 | 0 | ½ | 0 | ½ | ½ | 0 | 1 | 0 | ½ | ● | 1 | 4 | 2 | 4 | 5 | |
| 12. | GM Bernstein, Ossip | 0 | 0 | 0 | 0 | ½ | 0 | 0 | 0 | ½ | 0 | 0 | ● | 1 | 0 | 2 | 9 |
| 1st round | |||||||||
| De Rooi, Paul | 1 - 0 | Kuijpers, Franciscus | |||||||
| IM Enevoldsen, Jens | ½ - ½ | IM Wade, Robert Graham | |||||||
| IM Johner, Hans | ½ - ½ | Crabbendam, Henrico | |||||||
| Langeweg, Christian | 1 - 0 | GM Bernstein, Ossip | |||||||
| Van den Berg, Carel | ½ - ½ | GM Donner, Jan | |||||||
| Wolthuis, Willem | ½ - ½ | Hiong Liong Tan | |||||||
| 1.-2. Langeweg, De Rooi 1; 3.-10. Donner, Enevoldsen, Wade, Hiong Liong Tan, Van den Berg, Johner, Crabbendam, Wolthuis ½; 11.-12. Kuijpers, Bernstein 0; | |||||||||
| 2nd round | |||||||||
| GM Bernstein, Ossip | ½ - ½ | Crabbendam, Henrico | |||||||
| GM Donner, Jan | 1 - 0 | Wolthuis, Willem | |||||||
| Kuijpers, Franciscus | 0 - 1 | IM Johner, Hans | |||||||
| Langeweg, Christian | 1 - 0 | IM Enevoldsen, Jens | |||||||
| Hiong Liong Tan | 1 - 0 | De Rooi, Paul | |||||||
| IM Wade, Robert Graham | ½ - ½ | Van den Berg, Carel | |||||||
| 1. Langeweg 2; 2.-4. Donner, Hiong Liong Tan, Johner 1½; 5.-8. Wade, Van den Berg, Crabbendam, De Rooi 1; 9.-11. Enevoldsen, Wolthuis, Bernstein ½; 12. Kuijpers 0; | |||||||||
| 3rd round | |||||||||
| Crabbendam, Henrico | 0 - 1 | Kuijpers, Franciscus | |||||||
| De Rooi, Paul | 0 - 1 | GM Donner, Jan | |||||||
| IM Enevoldsen, Jens | 1 - 0 | GM Bernstein, Ossip | |||||||
| IM Johner, Hans | ½ - ½ | Hiong Liong Tan | |||||||
| Van den Berg, Carel | 0 - 1 | Langeweg, Christian | |||||||
| Wolthuis, Willem | 0 - 1 | IM Wade, Robert Graham | |||||||
| 1. Langeweg 3; 2. Donner 2½; 3.-5. Wade, Hiong Liong Tan, Johner 2; 6. Enevoldsen 1½; 7.-10. Van den Berg, Kuijpers, Crabbendam, De Rooi 1; 11.-12. Wolthuis, Bernstein ½; | |||||||||
| 4th round | |||||||||
| GM Bernstein, Ossip | 0 - 1 | Kuijpers, Franciscus | |||||||
| GM Donner, Jan | 1 - 0 | IM Johner, Hans | |||||||
| IM Enevoldsen, Jens | 1 - 0 | Van den Berg, Carel | |||||||
| Langeweg, Christian | 1 - 0 | Wolthuis, Willem | |||||||
| Hiong Liong Tan | 0 - 1 | Crabbendam, Henrico | |||||||
| IM Wade, Robert Graham | 1 - 0 | De Rooi, Paul | |||||||
| 1. Langeweg 4; 2. Donner 3½; 3. Wade 3; 4. Enevoldsen 2½; 5.-8. Hiong Liong Tan, Kuijpers, Johner, Crabbendam 2; 9.-10. Van den Berg, De Rooi 1; 11.-12. Wolthuis, Bernstein ½; | |||||||||
| 5th round | |||||||||
| Crabbendam, Henrico | ½ - ½ | GM Donner, Jan | |||||||
| De Rooi, Paul | 0 - 1 | Langeweg, Christian | |||||||
| IM Johner, Hans | 0 - 1 | IM Wade, Robert Graham | |||||||
| Kuijpers, Franciscus | 1 - 0 | Hiong Liong Tan | |||||||
| Van den Berg, Carel | 1 - 0 | GM Bernstein, Ossip | |||||||
| Wolthuis, Willem | ½ - ½ | IM Enevoldsen, Jens | |||||||
| 1. Langeweg 5; 2.-3. Donner, Wade 4; 4.-5. Enevoldsen, Kuijpers 3; 6. Crabbendam 2½; 7.-9. Hiong Liong Tan, Van den Berg, Johner 2; 10.-11. De Rooi, Wolthuis 1; 12. Bernstein ½; | |||||||||
| 6th round | |||||||||
| GM Bernstein, Ossip | ½ - ½ | Hiong Liong Tan | |||||||
| GM Donner, Jan | 1 - 0 | Kuijpers, Franciscus | |||||||
| IM Enevoldsen, Jens | 1 - 0 | De Rooi, Paul | |||||||
| Langeweg, Christian | 1 - 0 | IM Johner, Hans | |||||||
| Van den Berg, Carel | ½ - ½ | Wolthuis, Willem | |||||||
| IM Wade, Robert Graham | ½ - ½ | Crabbendam, Henrico | |||||||
| 1. Langeweg 6; 2. Donner 5; 3. Wade 4½; 4. Enevoldsen 4; 5.-6. Kuijpers, Crabbendam 3; 7.-8. Hiong Liong Tan, Van den Berg 2½; 9. Johner 2; 10. Wolthuis 1½; 11.-12. De Rooi, Bernstein 1; | |||||||||
| 7th round | |||||||||
| Crabbendam, Henrico | 0 - 1 | Langeweg, Christian | |||||||
| De Rooi, Paul | 1 - 0 | Van den Berg, Carel | |||||||
| IM Johner, Hans | 0 - 1 | IM Enevoldsen, Jens | |||||||
| Kuijpers, Franciscus | 0 - 1 | IM Wade, Robert Graham | |||||||
| Hiong Liong Tan | 1 - 0 | GM Donner, Jan | |||||||
| Wolthuis, Willem | 1 - 0 | GM Bernstein, Ossip | |||||||
| 1. Langeweg 7; 2. Wade 5½; 3.-4. Donner, Enevoldsen 5; 5. Hiong Liong Tan 3½; 6.-7. Kuijpers, Crabbendam 3; 8.-9. Van den Berg, Wolthuis 2½; 10.-11. Johner, De Rooi 2; 12. Bernstein 1; | |||||||||
| 8th round | |||||||||
| GM Bernstein, Ossip | 0 - 1 | GM Donner, Jan | |||||||
| IM Enevoldsen, Jens | ½ - ½ | Crabbendam, Henrico | |||||||
| Langeweg, Christian | 1 - 0 | Kuijpers, Franciscus | |||||||
| Van den Berg, Carel | 0 - 1 | IM Johner, Hans | |||||||
| IM Wade, Robert Graham | 0 - 1 | Hiong Liong Tan | |||||||
| Wolthuis, Willem | ½ - ½ | De Rooi, Paul | |||||||
| 1. Langeweg 8; 2. Donner 6; 3.-4. Enevoldsen, Wade 5½; 5. Hiong Liong Tan 4½; 6. Crabbendam 3½; 7.-9. Kuijpers, Johner, Wolthuis 3; 10.-11. Van den Berg, De Rooi 2½; 12. Bernstein 1; | |||||||||
| 9th round | |||||||||
| Crabbendam, Henrico | 0 - 1 | Van den Berg, Carel | |||||||
| De Rooi, Paul | 1 - 0 | GM Bernstein, Ossip | |||||||
| GM Donner, Jan | 1 - 0 | IM Wade, Robert Graham | |||||||
| IM Johner, Hans | 0 - 1 | Wolthuis, Willem | |||||||
| Kuijpers, Franciscus | 1 - 0 | IM Enevoldsen, Jens | |||||||
| Hiong Liong Tan | 1 - 0 | Langeweg, Christian | |||||||
| 1. Langeweg 8; 2. Donner 7; 3.-5. Enevoldsen, Wade, Hiong Liong Tan 5½; 6.-7. Kuijpers, Wolthuis 4; 8.-10. Van den Berg, Crabbendam, De Rooi 3½; 11. Johner 3; 12. Bernstein 1; | |||||||||
| 10th round | |||||||||
| GM Bernstein, Ossip | 0 - 1 | IM Wade, Robert Graham | |||||||
| De Rooi, Paul | 0 - 1 | IM Johner, Hans | |||||||
| IM Enevoldsen, Jens | 1 - 0 | Hiong Liong Tan | |||||||
| Langeweg, Christian | 0 - 1 | GM Donner, Jan | |||||||
| Van den Berg, Carel | 1 - 0 | Kuijpers, Franciscus | |||||||
| Wolthuis, Willem | 0 - 1 | Crabbendam, Henrico | |||||||
| 1.-2. Langeweg, Donner 8; 3.-4. Enevoldsen, Wade 6½; 5. Hiong Liong Tan 5½; 6.-7. Van den Berg, Crabbendam 4½; 8.-10. Kuijpers, Johner, Wolthuis 4; 11. De Rooi 3½; 12. Bernstein 1; | |||||||||
| 11th round | |||||||||
| Crabbendam, Henrico | 0 - 1 | De Rooi, Paul | |||||||
| GM Donner, Jan | ½ - ½ | IM Enevoldsen, Jens | |||||||
| IM Johner, Hans | 1 - 0 | GM Bernstein, Ossip | |||||||
| Kuijpers, Franciscus | 1 - 0 | Wolthuis, Willem | |||||||
| Hiong Liong Tan | ½ - ½ | Van den Berg, Carel | |||||||
| IM Wade, Robert Graham | 0 - 1 | Langeweg, Christian | |||||||
| 1. Langeweg 9; 2. Donner 8½; 3. Enevoldsen 7; 4. Wade 6½; 5. Hiong Liong Tan 6; 6.-8. Van den Berg, Kuijpers, Johner 5; 9.-10. Crabbendam, De Rooi 4½; 11. Wolthuis 4; 12. Bernstein 1; | |||||||||
| 1st IBM chess tournament | |
| Dates: | 24th May - 6th June 1961 |
| City: | Amsterdam (Netherlands) |
| Venue: | |
| Organizers: | Amsterdam chess club VAS |
| Chief Arbiter: | |
| Players participating: | 12 (incl. 2 GMs, 3 IMs) |
| Games played: | 66 |
| Competition format: | Round Robin |
| Tie-breaks: | none |
| Time control: | |
| PGN game file: | ibm-1961.pgn |