Author: Uri Blass
Date: 09:23:27 11/20/05
Go up one level in this thread
On November 20, 2005 at 11:45:57, Zappa wrote:
>On November 20, 2005 at 09:09:07, Will Singleton wrote:
>
>>[d]2bk3r/q5b1/p2pp2p/1p6/1P6/5Q2/P1P2RPP/5R1K w - - bm Qg3; "26.Qg3";
>>
>>26.Qc6 and Qg4 seem to lead to forced rep draws, while Qg3 gives white
>>winning chances. To solve this, your program should show a plus score for
>>Qg3, since an eval of 0 or less would be equal or inferior to at least 2
>>other moves.
>>
>>[Event "ICC 50 3"]
>>[Site "Internet Chess Club"]
>>[Date "2005.11.19"]
>>[Round "-"]
>>[White "PostModernist"]
>>[Black "Amateur"]
>>[Result "1/2-1/2"]
>>[ICCResult "Game drawn by repetition"]
>>[WhiteElo "2565"]
>>[BlackElo "2604"]
>>[Opening "Sicilian: Najdorf, Byrne (English) attack"]
>>[ECO "B90"]
>>[NIC "SI.14"]
>>[Time "22:58:28"]
>>[TimeControl "3000+3"]
>>
>>1. e4 c5 2. Nf3 d6 3. d4 Nf6 4. Nc3 cxd4 5. Nxd4 a6 6. Be3 Ng4 7. Bg5 Ne5 8.
>>Be2 Nbc6 9. Nd5 Rb8 10. O-O h6 11. Be3 e6 12. Nc3 Na5 13. Rb1 b5 14. b4 Nac4
>>15. Bxc4 Nxc4 16. Nc6 Nxe3 17. fxe3 Qb6 18. Nxb8 Qxe3+ 19. Rf2 Qxc3 20. Qf3
>>Qc7 21. Rbf1 f6 22. e5 Qxb8 23. exf6 Qa7 24. fxg7 Bxg7 25. Kh1 Kd8 26. Qc6
>>Qd7 27. Qe4 Qe7 28. Rf7 Rf8 29. Qg6 Rxf7 30. Rxf7 Qh4 31. g3 Qxb4 32. Rxg7
>>Qe1+ 33. Kg2 Qe2+ 34. Kh3 e5+ 35. g4 Qf3+ 36. Kh4 Qf2+ 37. Kh3 Qf3+ 38. Kh4
>>Qf2+ 39. Kh3 Qf3+ {Game drawn by repetition} 1/2-1/2
>
>actually does a bit worse here than 1.1, I guess.
>
>1. Qf3-g4 Qa7-d4 2. Rf2-f4 Qd4-e5 3. Rf4-f7 Rh8-g8 4. Qg4-f3 d6-d5 5. Qf3-f2
>d5-d4 6. Qf2-f3 Bc8-d7 7. Qf3-a8 Bd7-c8
> = (-0.56) Depth: 12/32 00:00:11.39 9530kN (836 KN/s, 0 splits, 0 aborts)
>1. Qf3-c6!!
> = (-0.55) Depth: 12/32 00:00:12.85 10848kN (844 KN/s, 0 splits, 0 aborts)
>1. Qf3-c6 Bc8-d7 2. Qc6xd6 Qa7-c7 3. Qd6xa6 Rh8-g8 4. Rf1-d1 Kd8-e7 5. c2-c4
>b5xc4 6. Rf2-d2 Bd7-e8
> = (0.22) Depth: 12/32 00:00:13.87 11764kN (848 KN/s, 0 splits, 0 aborts)
>1. Qf3-c6 Bc8-d7 2. Qc6xd6 Qa7-c7 3. Qd6xa6 Rh8-g8 4. Rf1-d1 Kd8-e7 5. c2-c4
>b5xc4 6. Rf2-d2 Bd7-e8
> = (0.22) Depth: 12/32 00:00:15.94 13685kN (859 KN/s, 0 splits, 0 aborts)
>1. Qf3-c6 Bc8-d7 2. Qc6xd6 Qa7-c7 3. Qd6xa6 Qc7-c6 4. Qa6-a7 Bg7-e5 5. Rf1-d1
>Rh8-g8 6. Rf2-d2 Kd8-e7
> = (0.63) Depth: 13/32 00:00:18.40 15736kN (855 KN/s, 0 splits, 0 aborts)
>1. Qf3-c6 Bc8-d7 2. Qc6xd6 Qa7-c7 3. Qd6xa6 Qc7-c6 4. Qa6-a7 Bg7-e5 5. Rf1-d1
>Rh8-g8 6. Rf2-d2 Kd8-e7
> = (0.63) Depth: 13/32 00:00:25.43 22246kN (875 KN/s, 0 splits, 0 aborts)
>1. Qf3-c6 Qa7-d7 2. Qc6-e4 Qd7-e7 3. Rf2-f7 Rh8-f8 4. Qe4-g6 Rf8xf7 5. Rf1xf7
>Qe7-h4 6. g2-g3 Qh4-h3 7. Qg6-e4 Bg7-e5
> = (-1.79) Depth: 14/32 00:00:37.17 32488kN (874 KN/s, 0 splits, 0 aborts)
>1. Qf3-g4!!
> = (-1.78) Depth: 14/33 00:00:41.18 35827kN (870 KN/s, 0 splits, 0 aborts)
>1. Qf3-g4 Qa7-d4 2. Rf2-f4 Qd4-e5 3. Rf4-f7 Rh8-g8 4. Qg4-f3 d6-d5 5. Qf3-f2
>d5-d4 6. Qf2-f3 Qe5-d6 7. a2-a3 Bg7-e5
> = (-0.59) Depth: 14/33 00:00:49.39 42994kN (870 KN/s, 0 splits, 0 aborts)
>1. Qf3-g3!!
> = (-0.58) Depth: 14/34 00:01:03.78 56013kN (878 KN/s, 0 splits, 0 aborts)
>1. Qf3-g3 Qa7-d4 2. Rf2-f4 Qd4-e5 3. Qg3-f2 Bc8-d7 4. Qf2-b6 Kd8-c8 5. Rf4-f7
>Rh8-d8 6. Qb6xa6 Kc8-b8 7. c2-c3 h6-h5 8. Qa6-b6 Kb8-c8 9. Rf1-d1
> = (0.71) Depth: 14/34 00:01:11.84 63019kN (877 KN/s, 0 splits, 0 aborts)
>1. Qf3-g3 Qa7-d4 2. Rf2-f4 Qd4-e5 3. Qg3-f2 Bc8-d7 4. Qf2-b6 Kd8-c8 5. Rf4-f7
>Rh8-d8 6. Qb6xa6 Kc8-b8 7. c2-c3 h6-h5 8. Qa6-b6 Kb8-c8 9. Rf1-d1
> = (0.71) Depth: 14/34 00:01:17.46 68242kN (881 KN/s, 0 splits, 0 aborts)
>1. Qf3-g3 Qa7-d4 2. Rf2-f4 Qd4-c3 3. Qg3-h4 Kd8-d7 4. Rf4-f7 Kd7-c6 5. Qh4-e7
>Bg7-e5 6. Qe7-c7 Kc6-d5 7. Rf1-d1 Kd5-e4 8. Qc7-e7 Be5-d4 9. Qe7xd6 Bd4-e5 10.
>Qd6-b6
> = (0.87) Depth: 15/36 00:01:36.13 85426kN (889 KN/s, 0 splits, 0 aborts)
>1. Qf3-g3 Qa7-d4 2. Rf2-f4 Qd4-c3 3. Qg3-h4 Kd8-d7 4. Rf4-f7 Kd7-c6 5. Qh4-e7
>Bg7-e5 6. Qe7-c7 Kc6-d5 7. Rf1-d1 Kd5-e4 8. Qc7-e7 Be5-d4 9. Qe7xd6 Bd4-e5 10.
>Qd6-b6
> = (0.87) Depth: 15/40 00:02:21.62 124919kN (882 KN/s, 0 splits, 0 aborts)
>1. Qf3-g3 Qa7-d4 2. Rf2-f4 Qd4-c3 3. Qg3-h4 Kd8-d7 4. Rf4-f7 Kd7-c6 5. Qh4-e7
>Bg7-e5 6. Qe7-c7 Kc6-d5 7. Rf1-d1 Kd5-e4 8. Qc7-e7 Be5-f4 9. Rf7xf4 Ke4xf4 10.
>Qe7-h4 Kf4-e5 11. Rd1-e1 Qc3xe1
> = (0.97) Depth: 16/40 00:02:53.31 152799kN (882 KN/s, 0 splits, 0 aborts)
>
>Zappa with dubious Fruit/Shredder-style-pruning:
Why do you call it dubious?
If the pruning helps Fruit/Shredder to play better then it is not dubious.
Uri
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