Author: Hans Havermann
Date: 17:59:06 03/23/99
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On March 23, 1999 at 18:13:57, Dann Corbit wrote: >In my previous message today, I asked about a position with a preferred move of >Qd2. >What I am wondering is the following: >1. Is that really the best move and how do we know? >2. If it is the best move, can someone provide a pv? >3. Does anyone know the exact game this position was taken from originally? >4. If it is not the best choice, is the one provided better? Worse? Why? I've got a relatively large database of games but there is lots of duplication so don't take the actual numbers in the following too seriously... Using ExaChess 1.2 (on a Macintosh) I find 13429 matches to your given position: Moves to search position: 6... d6 (35 games) 6... Nc6 (75 games) 6... e6 (13319 games) Moves from search position: 7 Qd2 (12262 games (91%), Score: 55%: +4677=4007-3511) 7 Bb5 (374 games (2%), Score: 51%: +136=111-126) 7 Qd3 (264 games (1%), Score: 56%: +106=82-75) 7 Be2 (203 games (1%), Score: 39%: +45=68-90) 7 f4 (131 games (0%), Score: 40%: +38=29-64) 7 Nxc6 (76 games (0%), Score: 34%: +21=9-45) 7 Bc4 (30 games (0%), Score: 30%: +7=4-19) 7 Nb3 (28 games (0%), Score: 46%: +7=11-9) 7 g3 (23 games (0%), Score: 35%: +6=4-13) 7 Ndb5 (18 games (0%), Score: 31%: +2=7-9) 7 f3 (8 games (0%), Score: 38%: +2=2-4) 7 Qe2 (7 games (0%), Score: 36%: +2=1-4) 7 Bxf6 (2 games (0%), Score: 0%: +0=0-2) 7 - (2 games (0%), Score: 50%: +0=1-0) 7 Nf3 (1 game (0%), Score: 0%: +0=0-1) The earliest example in the database seems to be: Alekhine - Board [Paris, 1925] 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Bg5 e6 7. Bb5 Bd7 8. O-O Be7 9. Nb3 a6 10. Be2 Qc7 11. f4 O-O 12. Bf3 Rac8 13. Qe2 Rfd8 14. Rad1 b5 15. a3 Ne8 16. Bxe7 Nxe7 17. e5 Bc6 18. Nd4 dxe5 19. fxe5 Qb6 20. Kh1 Rxd4 21. Rxd4 Qxd4 22. Bxc6 Nxc6 23. Ne4 Qxe5 24. Qf3 Qf5 25. Qe2 Qg6 26. c3 Ne5 27. h3 f5 28. Nd2 Qf6 29. a4 Nd6 30. axb5 axb5 31. Re1 Ndc4 32. Nxc4 Nxc4 33. b3 Na5 34. Qxb5 Qxc3 35. Rxe6 Qc1+ 36. Kh2 Qf4+ 37. Kh1 Rc1+ 0-1 Hope this helps.
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