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Subject: Re: Position from Sjeng - Chezzz

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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