Author: Roy Brunjes
Date: 08:02:31 11/20/05
Go up one level in this thread
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
Here is Fruit 2.2.1 on my 1.5 GHz Centrino laptop:
FEN: 2bk3r/q5b1/p2pp2p/1p6/1P6/5Q2/P1P2RPP/5R1K w - - 2 26
Fruit 2.2.1:
1/2 00:00 16 0 -1.15 Rd2
2/7 00:00 183 0 -1.37 Rd2 Be5
2/7 00:00 265 0 -1.12 Rd1 Bd4
2/7 00:00 457 0 -0.97 Qc6 Qe7
3/8 00:00 926 0 -1.05 Qc6 Qd7 Qb6+ Qc7
4/10 00:00 2.760 0 -0.52 Qc6 Qd7 Qb6+ Ke8 Rf3
5/12 00:00 5.941 0 -0.51 Qc6 Qd7 Qb6+ Ke8 Rd1 Be5
6/13 00:00 12.616 0 -0.64 Qc6 Qd7 Qb6+ Ke8 Rf3 Be5 Re1
7/18 00:00 38.487 0 -0.88 Qc6 Qd7 Qb6+ Ke8 Qb8 Bd4 Rf7 Qc6
7/20 00:00 99.978 0 -0.68 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 c4
8/21 00:00 157.552 0 -0.53 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 Rd1 d5
9/22 00:01 246.328 0 -0.76 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 Rd1 d5 Qh4+ Qg5
10/22 00:01 515.726 0 -0.74 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 Qf3 Qc3 Qg4 Qc4 Qxc4
bxc4
11/27 00:02 1.095.366 568.471 -0.74 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 Qf3 Qc3 Qg4 Qc4
Qxc4 bxc4
12/28 00:04 2.487.254 582.260 -0.76 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 c4 d5 cxb5 axb5
Rc1 Bd7 Qh4+ Qg5
13/30 00:09 5.460.584 584.337 -0.70 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 c4 d5 cxb5 axb5
Qg6 Qe4 Qg3 Qe5
13/42 00:33 18.075.737 552.193 -0.58 c4 bxc4 Qg3 Be5 Qh4+ Qe7 Rf8+ Rxf8 Rxf8+
Kd7 Qxe7+ Kxe7 Rxc8 d5 Ra8 Bd6 a3 c3 Rxa6
14/42 01:18 42.335.262 545.136 -0.48 c4 Bd4 Rd2 Qg7 Qc6 Be5 cxb5 axb5 Qxb5
Rf8 Qb6+ Ke8 Rxf8+ Qxf8 Rf2 Qg7 Rf3 d5
15/42 02:01 66.096.170 548.021 -0.53 c4 Bd4 Rd2 Qg7 Qc6 Be5 cxb5 axb5 Qxb5
Rf8 Qb6+ Ke8 Rxf8+ Qxf8 Rf2 Qg7 Qc6+ Bd7 Qc7 Ke7
15/42 02:09 70.835.532 549.924 0.00 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 Qf3 d5 Qf2 Qd4
Qg3 Qe5 Qf2
16/42 02:24 80.369.366 557.327 0.00 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 Qf3 d5 Qf2 Qd4
Qg3 Qe5 Qf2
17/54 02:57 100.868.045 569.502 0.00 Qg4 Qd4 Rf4 Qe5 Rf7 Rg8 Qf3 d5 Qf2 Qd4
Qg3 Qe5 Qf2
17/54 04:38 159.173.261 572.776 +1.17 Qg3 Qd4 Rf4 Qe5 Qf2 Qd5 Qb6+ Ke8 Rf7 Rg8
Rc7 Qxg2+ Kxg2 Bd4+ Kh3 Bxb6 Rxc8+ Bd8 Rc6 Kd7 Rxa6 e5
18/54 05:37 196.153.221 581.218 +1.14 Qg3 Qd4 Rf4 Qc3 Qh4+ Kc7 R4f3 Qb2 Qe7+
Kb8 c3 Rg8 Rf7 Qxg2+ Kxg2 Bf6+ Kf2 Bxe7 Rxe7 e5 Ke3 Rg6 Rf2 Bb7
So, 4 minutes and 38 seconds to see Qg3 with a positive eval for White.
A rather difficult position!
Roy
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