Author: Tom Likens
Date: 06:53:37 06/28/03
Go up one level in this thread
On June 28, 2003 at 04:56:47, Alastair Scott wrote:
>I'm sure most human players would instinctively play ... Re1+ and Rxe5, moving
>to a won K+P endgame. The (few) programs I have tried have different ideas,
>usually Re1+ and Re4:
>
>[d] 8/4p3/p7/3kBp2/P4Pp1/4K3/8/3r4 b - -
>
>The whole game is below; our friend the Bishop 'sacrifice' on g4/g5 turns up in
>unusual clothes.
>
>For those about to cry 'brilliancy' I was pleased with the manoeuver on moves 18
>to 20 but the 'sacrifice' on move 24 was because I overlooked the Rook on h5
>being en prise thereafter; it was fortunate ... g3 won :)
>
>Alastair
>
>[Event "Casual Game"]
>[Site "London, ENG"]
>[Date "2003.06.27"]
>[Round "1"]
>[White "Chess Tiger 15.0 Zire 71"]
>[Black "Alastair Scott"]
>[Result "0-1"]
>
>1. e4 g6 2. d4 d5 3. exd5 Qxd5 4. c4 Qd6 5. Nc3 a6 6. Be2 Bg7 7. Nf3 Bg4
>8. O-O Nf6 9. Qb3 b6 10. Bg5 Nbd7 11. h3 h5 12. hxg4 hxg4 13. c5 bxc5
>14. Ne5 Nxe5 15. dxe5 Qxe5 16. Qa4+ Kf8 17. Qf4 Qf5 18. Qe3 Rh5 19. Bf4 g5
>20. Bxc7 Qh7 21. f4 Ne4 22. Nxe4 Bd4 23. Qxd4 cxd4 24. Nf2 g3 25. Bxh5 Qxh5
>26. Rfd1 Qh2+ 27. Kf1 gxf2 28. Kxf2 Qh4+ 29. Kf3 g4+ 30. Ke2 Qg3
>31. Rxd4 Qxg2+ 32. Kd3 Qf3+ 33. Kd2 Qb7 34. Be5 Qxb2+ 35. Ke3 Qxa1
>36. Rd8+ Rxd8 37. Bxa1 f5 38. Be5 Kf7 39. a3 Ke6 40. Bc7 Rd1 41. a4 Kd5
>42. Be5 Re1+ 43. Kf2 Rxe5 44. fxe5 f4 45. e6 g3+ 46. Kf3 a5 47. Kg2 Ke4
>48. Kg1 f3 49. Kf1 Ke3 50. Kg1 Ke2 51. Kh1 f2 52. Kg2 f1=Q+ 53. Kxg3 Qf3+
>54. Kh4 Qg2 55. Kh5 Kf3 56. Kh6 Kf4 57. Kh7 Kf5 58. Kh8 Kf6 59. Kh7 Qg7#
>0-1
From the position given by engine gives the following PV. It never really
considers anything but trading the rook for the bishop.
2 00:00:00 -14.06 1. ... Re1+ 2. Kf2 Rxe5 3. fxe5H Kxe5 <HT>
3 00:00:00 -14.06 1. ... Re1+ 2. Kf2 Rxe5 3. fxe5 Kxe5 <HT>
4 00:00:00 -15.59 1. ... Re1+ 2. Kf2 Rxe5 3. a5 Re6
5 00:00:00 -.-- 1. ... Rd3+ 2. Kf2
5 00:00:00 -13.96 1. ... Re1+ 2. Kd3 Rxe5 3. fxe5 Kxe5 4. a5
6 00:00:00 -13.72 1. ... Re1+ 2. Kd2 Rxe5 3. fxe5 g3 4. Ke2 Kxe5
7 00:00:00 -13.84 1. ... Re1+ 2. Kd3 Rxe5 3. fxe5 Kxe5 4. Kc4 a5
5. Kc5
8 00:00:00 -.-- 1. ... Re1+ 2. Kd3 Rxe5 3. fxe5 Kxe5 4. Kc4 a5
5. Kc5 <HT>
8 00:00:00 -11.99 1. ... Re1+ 2. Kf2 Rxe5 3. fxe5 Kxe5 4. a5 g3+
5. Kxg3 Ke4H 6. Kg2 <HT>
9 00:00:00 +.++ 1. ... Re1+!!
9 00:00:01 -14.64 1. ... Re1+ 2. Kd2 Rxe5 3. fxe5 Kxe5 4. Kd3 f4
5. Kc4 Ke4 6. a5
10 00:00:02 -.-- 1. ... Re1+ 2. Kd2 Rxe5 3. fxe5 Kxe5 4. Kd3 f4
5. Kc4 Ke4
10 00:00:02 -13.59 1. ... Re1+ 2. Kd2 Rxe5 3. fxe5 Kxe5 <HT>
11 00:00:00 +.++ 1. ... Re1+!!
11 00:00:11 -17.85 1. ... Re1+ 2. Kf2 Rxe5 3. a5 Re4 4. Kg3 Kd4
5. Kh4 Rxf4 6. Kg5 e5 7. Kf6
time:30 nodes:16000446 qnodes:11407713 (71.30%) nps:533348 abf:2.13
Max depth: 21, Average depth: 13.10
regards,
--tom
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