Author: Dann Corbit
Date: 11:20:07 01/21/02
Go up one level in this thread
On January 21, 2002 at 13:46:13, Dann Corbit wrote:
>On January 21, 2002 at 13:41:25, Dann Corbit wrote:
>
>>On January 21, 2002 at 11:00:13, David Rasmussen wrote:
>>
>>>[D]8/1R5P/8/p7/2k1pK2/2p5/8/7r b - - 0 60
>>>
>>>Chezzz eventually moved Rh4+, which lead to a draw. It considered c2, but
>>>rejected it. What is the best move here, and can black win? The game history
>>>might be important too, I don't know. Here's the game:
>>>
>>>[Event "ICC 60 10 u"]
>>>[Site "Internet Chess Club"]
>>>[Date "2002.01.20"]
>>>[Round "-"]
>>>[White "Sjeng"]
>>>[Black "Chezzz"]
>>>[Result "1/2-1/2"]
>>>[ICCResult "Game drawn by mutual agreement"]
>>>[WhiteElo "2492"]
>>>[BlackElo "2362"]
>>>[Opening "Queen's pawn: English defense"]
>>>[ECO "A40"]
>>>[NIC "QO.17"]
>>>[Time "13:23:40"]
>>>[TimeControl "3600+10"]
>>>
>>>1. d4 b6 2. e4 Bb7 3. f3 e6 4. Nc3 Bb4 5. Ne2 d5 6. a3 Be7 7. Nf4 dxe4 8.
>>>fxe4 Nf6 9. Bb5+ c6 10. Be2 O-O 11. O-O a5 12. e5 Nd5 13. Ncxd5 exd5 14. Nh5
>>>Bc8 15. Qe1 Bh4 16. Nf6+ Qxf6 17. exf6 Bxe1 18. fxg7 Kxg7 19. Rxe1 Bf5 20.
>>>c4 dxc4 21. Bxc4 Nd7 22. Bd2 Rae8 23. d5 cxd5 24. Bxd5 Nf6 25. Bc3 Kg6 26.
>>>Bb3 Ne4 27. Bd4 Nc5 28. Bxc5 bxc5 29. Ba4 Rxe1+ 30. Rxe1 Rb8 31. Re2 Kf6 32.
>>>Kf2 Bd3 33. Rd2 Be4 34. Ke3 Ke5 35. Bd1 f5 36. g3 c4 37. Re2 Rd8 38. Bc2 Rb8
>>>39. Ba4 h5 40. Kf2 h4 41. gxh4 Rh8 42. Bc2 Rxh4 43. Bxe4 fxe4 44. Kg3 Rh8
>>>45. h4 Kd4 46. Rd2+ Ke3 47. Rd7 Rg8+ 48. Kh3 Rb8 49. h5 Rxb2 50. h6 Rb6 51.
>>>h7 Rh6+ 52. Kg4 c3 53. Kg5 Rh1 54. Rc7 Kd2 55. Rd7+ Kc1 56. Rf7 Kb2 57. Rb7+
>>>Kxa3 58. Rc7 Kb3 59. Rb7+ Kc4 60. Kf4 Rh4+ 61. Kg3 Rh6 62. Kf4 Kd5 63. Rc7
>>>Rh5 64. Kg4 Rh1 65. Rxc3 Rxh7 66. Ra3 Ra7 67. Ra4 Ke5 68. Kg3 Kf5 69. Kf2
>>>Kf4 70. Ke2 Ra6 71. Kf2 Ra7 72. Ke2 Ra6 73. Kf2 Ra8 74. Ke2 Ra7 75. Kf2 Ra8
>>>76. Ke2 Ra7 77. Kf2 Ra6 78. Ke2 Rh6 79. Rxa5 Rh2+ 80. Kd1
>>>{Game drawn by mutual agreement}
>>>1/2-1/2
>>>
>>>What knowledge does a program need to pick the/a winning move from this position
>>>fairly quickly (besides from TB's)?
>>
>>Takes Pepito quite a while to find a4 (almost 3 minutes).
>>
>>Pepito> setboard 8/1R5P/8/p7/2k1pK2/2p5/8/7r b - -
>>Pepito> go
>> 5 362 91 9890 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Ke2-d2
>> 5 362 92 11794 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Ke2-d2
>> 6 329 99 41454 c2 ?? Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Ke2-d2
>> 6 330 102 49557 c2 !!
>> 6 327 102 51900 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-c3 Rd7-c7 Kc3-d2 Rc7-d7
>>Kd2-e2 Rd7-c7
>> 6 327 104 58531 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-c3 Rd7-c7 Kc3-d2 Rc7-d7
>>Kd2-e2 Rd7-c7
>> 7 360 111 87456 c2 !!
>> 7 333 112 91502 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-c3 Rd7-c7 Kc3-d2 Rc7-d7
>> 7 333 119 120933 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-c3 Rd7-c7 Kc3-d2 Rc7-d7
>> 8 300 175 366319 c2 ?? Rb7-c7 Kc4-d3 Rc7-d7 Kd3-c3 Rd7-c7 Kc3-d2 Rc7-d7
>> 8 284 221 562189 Kc4-d5 Rb7-c7 a4 Kf4-f5 a3 Rc7xc3 a2 Rc3-a3 a1=B
>> 8 284 238 634808 Kc4-d5 Rb7-c7 a4 Kf4-f5 a3 Rc7xc3 a2 Rc3-a3 a1=B
>> 9 293 285 844319 Kc4-d5 Rb7-c7 a4 Kf4-f5 a3 Rc7xc3 a2 Rc3-a3 Rh1-f1
>>Kf5-g6 Rf1-g1 Kg6-f6 a1=B
>> 9 293 334 1068215 Kc4-d5 Rb7-c7 a4 Kf4-f5 a3 Rc7xc3 a2 Rc3-a3 Rh1-f1
>>Kf5-g6 Rf1-g1 Kg6-f6 a1=B
>>10 289 433 1522123 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-f6 e3 Rc7-d7 Kd4-e4
>>Rd7-e7 Ke4-d3 Kf6-g7
>>10 289 547 2050061 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-f6 e3 Rc7-d7 Kd4-e4
>>Rd7-e7 Ke4-d3 Kf6-g7
>>11 265 653 2543858 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-g6 e3 Rc7-d7 Kd4-e4
>>Rd7-e7 Ke4-d3 Re7-d7 Kd3-e2 Kg6-g7
>>11 265 854 3451594 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-g6 e3 Rc7-d7 Kd4-e4
>>Rd7-e7 Ke4-d3 Re7-d7 Kd3-e2 Kg6-g7
>>12 291 1221 4979960 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-g6 e3 Rc7-d7 Kd4-e4
>>Rd7-d1 Rh1-h4 Kg6-g7 Rh4-g4 Kg7-h8
>>12 291 1472 6158720 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-g6 e3 Rc7-d7 Kd4-e4
>>Rd7-d1 Rh1-h4 Kg6-g7 Rh4-g4 Kg7-h8
>>13 271 1963 8319152 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-g6 e3 Rc7-d7 Kd4-c4
>>Rd7-d1 Rh1-h4 Rd1-a1 Kc4-b3 Kg6-g7
>>13 271 2931 12869142 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-g6 e3 Rc7-d7 Kd4-c4
>>Rd7-d1 Rh1-h4 Rd1-a1 Kc4-b3 Kg6-g7
>>14 257 4713 20943418 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-g6 e3 Rc7-d7 Kd4-e4
>>Rd7-d1 Rh1xd1 h8=Q c2 Qh8-e8 Ke4-d3 Qe8-b5 Kd3-c3 Qb5-a5 Kc3
>>-b2
>>14 257 9437 42121527 Kc4-d5 Rb7-c7 a4 Kf4-f5 Kd5-d4 Kf5-g6 e3 Rc7-d7 Kd4-e4
>>Rd7-d1 Rh1xd1 h8=Q c2 Qh8-e8 Ke4-d3 Qe8-b5 Kd3-c3 Qb5-a5 Kc3
>>-b2
>>15 237 12704 56324491 Kc4-d5 Rb7-c7 a4 Rc7xc3 Rh1xh7 Rc3-a3 Rh7-f7 Kf4-g5
>>Rf7-g7 Kg5-f4 Rg7-a7 Ra3-a1 Ra7-f7 Kf4-g4 e3 Ra1xa4 e2 Ra4-a5 K
>>d5-e4 Ra5-a1
>>15 290 17508 77808102 a4 !!
>
>To beat you to the punch, I did this analysis without tablebase files!
>
>I will do a follow-up with tablebase files enabled (I assumed that the current
>Chezzz does not have tablebase files).
With tablebase files on, Pepito wants to play Kd3
Pepito v1.47, Copyright (C) 2000-01 Carlos del Cacho
Pepito comes with ABSOLUTELY NO WARRANTY. This is free
software, you can redistribute it and/or modify it under
the terms of the GNU General Public License as published
by the FSF; see file COPYING for details.
HASH_SIZE: 4194304 entries / 64.00 MB
PAWN_HASH_SIZE: 131072 entries / 1.50 MB
ECACHE_SIZE: 32768 entries / 0.50 MB
EGTB_PATH: e:\programme\winboard\nalimov
RMARGIN: -1000
USE_BOOK: yes
PRI_BOOK: Found
SEC_BOOK: Found
PRI_BOOK_FILE: plib
SEC_BOOK_FILE: slib
BOOK_RANDOM: yes
HASH_STORE_DEPTH: 1
Type "help" for a list of available commands.
Pepito> hash 256M
Pepito> post (debe ser potencia de 2):
Pepito> level 40 2400 2400
Pepito> setboard 8/1R5P/8/p7/2k1pK2/2p5/8/7r b - -
Pepito> xboard
feature done=0
feature ping=1 setboard=1 time=1 draw=0 sigint=0 sigterm=0 reuse=1 analyze=1
myname="Pepito v1.47" variants="normal" colors=1 ics=0 name=0 d
one=1
go
5 362 93 10653 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Ke2-d2
5 362 104 12391 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Ke2-d2
6 329 125 41911 c2 ?? Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Ke2-d2
6 286 147 90891 Kc4-d5 Rb7-c7 a4 Rc7-d7 Kd5-c6 Rd7-f7 c2 Rf7-f6 Kc6-d5
6 286 155 101150 Kc4-d5 Rb7-c7 a4 Rc7-d7 Kd5-c6 Rd7-f7 c2 Rf7-f6 Kc6-d5
7 285 198 140278 Kc4-d5 Rb7-c7 c2 Rc7xc2 Rh1xh7 Rc2-d2 Kd5-c4 Kf4-e3
Rh7-h4
7 285 293 181195 Kc4-d5 Rb7-c7 c2 Rc7xc2 Rh1xh7 Rc2-d2 Kd5-c4 Kf4-e3
Rh7-h4
8 284 410 304424 Kc4-d5 Rb7-c7 a4 Kf4-f5 a3 Rc7xc3 a2 Rc3-a3 a1=B
8 318 480 341481 c2 !!
8 336 568 391491 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1xh7 Rc7xc2
Ke2-d3 Rc2-a2 Rh7-h5
8 336 627 428217 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1xh7 Rc7xc2
Ke2-d3 Rc2-a2 Rh7-h5
9 337 836 534533 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1-h4 Kf4-e5
Ke2-d1 Rc7-d7 Kd1-e1 Rd7-c7 Ke1-d2
9 337 1068 621052 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1-h4 Kf4-e5
Ke2-d1 Rc7-d7 Kd1-e1 Rd7-c7 Ke1-d2
10 370 1315 780944 c2 !!
10 336 1438 839122 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1-h4 Kf4-g5
10 336 2880 1195467 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1-h4 Kf4-g5
11 341 3256 1449338 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1-h4 Kf4-f5
Rh4xh7 Rc7xc2 Ke2-d3 Rc2-a2 Rh7-h5 Kf5-g4 Rh5-c5 Kg4-f4
11 341 4015 1863724 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1-h4 Kf4-f5
Rh4xh7 Rc7xc2 Ke2-d3 Rc2-a2 Rh7-h5 Kf5-g4 Rh5-c5 Kg4-f4
12 374 5325 2830873 c2 !!
12 336 5736 3090502 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1-h4 Kf4-g3
12 336 14403 6755695 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-e2 Rd7-c7 Rh1-h4 Kf4-g3
13 369 15475 7558543 c2 !!
13 332 17334 8592400 c2 Rb7-c7 Kc4-d3 Rc7-d7 Kd3-c3 Rd7-c7 Kc3-d2 Rc7-d7
Kd2-e1 Rd7-c7 Rh1-h4 Kf4-g3 Rh4xh7 Rc7xc2 e3 Rc2-a2 Rh7-h5 Kg3-
f4
13 357 38483 19200381 Kc4-d3 Rb7-d7 Kd3-e2 Rd7-c7 e3 Kf4-e4 Rh1-h4 Ke4-f5
Ke2-f2 Kf5-g5 e2 Rc7-f7 Kf2-g3 Rf7-e7 Rh4xh7 Re7xe2 a4
13 357 38486 19200381 Kc4-d3 Rb7-d7 Kd3-e2 Rd7-c7 e3 Kf4-e4 Rh1-h4 Ke4-f5
Ke2-f2 Kf5-g5 e2 Rc7-f7 Kf2-g3 Rf7-e7 Rh4xh7 Re7xe2 a4
14 390 46238 24831667 Kc4-d3 !!
14 408 53403 31075858 Kc4-d3 Rb7-d7 Kd3-e2 Rd7-c7 e3 Rc7xc3 Rh1-h4 Kf4-g5
Rh4xh7 Rc3-c8 Rh7-g7 Kg5-f6 Rg7-g2 Rc8-c2 Ke2-f1 Rc2-c1 Kf1-f2
Rc1-c2 e2 Kf6-e5
14 408 58112 33449131 Kc4-d3 Rb7-d7 Kd3-e2 Rd7-c7 e3 Rc7xc3 Rh1-h4 Kf4-g5
Rh4xh7 Rc3-c8 Rh7-g7 Kg5-f6 Rg7-g2 Rc8-c2 Ke2-f1 Rc2-c1 Kf1-f2
Rc1-c2 e2 Kf6-e5
15 412 68984 43676466 Kc4-d3 Rb7-d7 Kd3-e2 Rd7-e7 e3 Re7xe3 Ke2-d2 Re3-e8
Rh1-h4 Kf4-f5 Rh4xh7 Re8-d8 Kd2-c1 Kf5-e5 c2 Rd8-f8 Rh7-e7 Ke5-
d6 Re7-d7 Kd6-c5 Kc1-d1
15 412 84897 50366998 Kc4-d3 Rb7-d7 Kd3-e2 Rd7-e7 e3 Re7xe3 Ke2-d2 Re3-e8
Rh1-h4 Kf4-f5 Rh4xh7 Re8-d8 Kd2-c1 Kf5-e5 c2 Rd8-f8 Rh7-e7 Ke5-
d6 Re7-d7 Kd6-c5 Kc1-d1
16 445 105996 68210423 Kc4-d3 !!
16 448 122829 84820425 Kc4-d3 Rb7-d7 Kd3-e2 Rd7-c7 e3 Rc7xc3 Rh1-h4 Kf4-g5
Rh4xh7 Rc3-c6 Rh7-d7 Rc6-b6 Ke2-d2 Rb6-b2 Kd2-c1 Rb2-e2 Kc1-d1
Re2-a2 e2 Ra2-a1 Kd1-d2
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