Author: Eelco de Groot
Date: 03:30:21 01/24/04
Go up one level in this thread
On January 22, 2004 at 20:24:37, horst meyer wrote:
>according to the post mortem analysis by kramnik and anand, which is absolutely
>correct, this was the only move to save the game, though it's just worth a draw.
>i doubt any engine can find Rxc3 in the following position:
I am afraid I agree, it seems nearly impossible for a program to find Rxc3 as
best if that move isn't evalled as a forced draw.
If it's evalled as a rook sac and if like Kramnik did the program would still
think White should win it with a4 (See Josés link‚ midpage on
http://www.chesscenter.com/twic/event/wijk2004/rd9.html), the alternatives to
23...Rxc3 would all have to go far_below_zero in the eval.
Two tries with different personalities in Rebel Dos:
+---+---+---+---+---+---+---+---+ Kramnik,V - Anand,V
8 | | | *R| *Q| | *R| *K| |
+---+---+---+---+---+---+---+---+ 00:00:00 00:00:00
7 | | *p| | | | *p| *p| |
+---+---+---+---+---+---+---+---+
6 | *p| | | *p| | *B| | *p| Time infinite
+---+---+---+---+---+---+---+---+ Hash 40 Mb
5 | | *N| | B | *p| p | | Q | Engine Rebel 12
+---+---+---+---+---+---+---+---+ Personality NOSEM.ENG
4 | | | | | p | | | | anti-GM Off
+---+---+---+---+---+---+---+---+ Tactics Off
3 | | | p | | | | p | | Bluff Chess Off
+---+---+---+---+---+---+---+---+ Style Normal
2 | p | p | | N | | | | | Strength Strongest
+---+---+---+---+---+---+---+---+ Search Nullmove
1 | | K | | R | | | | R |
+---+---+---+---+---+---+---+---+ 22.. f4-f5 Be6xd5
a b c d e f g h 23.. Bc4xd5
2rq1rk1/1p3pp1/p2p1b1p/1n1BpP1Q/4P3/2P3P1/PP1N4/1K1R3R b - -
[Event "?"]
[Site "?"]
[Date "??.??.????"]
[Round "?"]
[White "Kramnik,V"]
[Black "Anand,V"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[ECO "B92"]
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.Bg5
Be6 9.Bxf6 Bxf6 10.Qd3 Nc6 11.O-O-O Be7 12.Kb1 O-O 13.Nd5 Bg5 14.h4
Bxh4 15.g3 Bf6 16.Qf3 Bg5 17.Qh5 h6 18.f4 Bf6 19.Nd2 Nd4 20.Bc4 Rc8
21.c3 Nb5 22.f5 Bxd5 23.Bxd5 *
00:00:00 1.00 -2.61 23..Nd4 24.cxd4 exd4 25.Bxb7 (4) (0.00)
00:00:00 1.01 -1.36 23..Nxc3+ 24.bxc3 Rxc3 25.Bxb7 (4) (0.00)
00:00:00 1.03 -0.15 23..Qd7 (1) (0.00)
00:00:00 1.06 -0.13 23..Qb6 (1) (0.00)
00:00:00 2.00 -0.09 23..Qb6 24.Ka1 (2) (0.00)
00:00:00 3.00 0.14 23..Qb6 24.Ka1 Bg5 (3) (0.00)
00:00:00 4.00 -0.49 23..Qb6 24.Ka1 Nc7 25.Nc4 (4) (0.00)
00:00:00 4.12 -0.49 23..Qa5 24.Qg6 Rxc3 25.Rxh6 (4) (0.00)
00:00:00 4.16 -0.43 23..Bg5 24.Qg6 Rxc3 25.bxc3 Nxc3 26.Ka1
Nxd5 (7) (0.00) (0)
00:00:01 5.00 -0.68 23..Bg5 24.Nf3 Be3 25.Bxb7 g6 26.fxg6
(6) (0.00) (1)
00:00:01 5.01 -0.63 23..Qa5 24.Nc4 Nxc3 25.bxc3 Qb5 26.Ka1
Rxc4 27.Bxc4 (8) (0.00) (1)
00:00:01 5.02 -0.49 23..Qb6 24.Ka1 Nc7 25.Nc4 (4) (0.00)
00:00:01 5.08 -0.42 23..Qc7 24.Qg6 Nxc3 25.bxc3 Qxc3 26.Nc4
Rxc4 27.Bxc4 (8) (0.00) (1)
00:00:01 5.17 -0.32 23..Nc7 24.Bxb7 Rb8 25.Bc6 d5 26.exd5
(6) (0.00) (1)
00:00:01 6.00 -0.55 23..Nc7 24.Bxb7 Rb8 25.Bc6 d5 26.Nc4
(6) (2.00) (1)
00:00:02 6.02 -0.37 23..Qb6 24.Bb3 Be7 25.Nc4 (4) (2.00)
00:00:04 7.00 -0.11 23..Qb6 24.Ka1 Qe3 25.Bxb7 Rxc3 26.Bxa6
Rc2 27.Bxb5 (8) (3.00) (3)
00:00:07 8.00 -0.34 23..Qb6 24.Ka1 Qc5 25.Nc4 Be7 26.g4
Nc7 27.b4 (8) (2.17) (5)
00:00:25 9.00 -0.39 23..Qb6 24.Ka1 Qc5 25.Bxb7 Nxc3 26.Rc1
Qe3 27.Bxc8 Rxc8 28.Rhd1 (10) (2.92) (22)
00:00:32 9.01 -0.39 23..Qa5 (1) (2.92)
00:00:41 9.01 -0.23 23..Qa5 24.Bb3 Qb6 (3) (2.92)
00:00:56 9.02 -0.19 23..Bg5 24.Nf3 Be3 25.c4 Nd4 26.Nxd4
Bxd4 27.Qg6 Rc5 28.f6 Qxf6 (11) (2.92) (41)
00:01:48 10.00 -0.46 23..Bg5 24.Nc4 Qe8 25.Na5 (4) (3.84)
00:02:08 10.01 -0.38 23..Qa5 24.Bb3 Qb6 (3) (3.84)
00:05:14 11.00 -0.34 23..Qa5 24.Bb3 (2) (3.15)
00:14:40 12.00 -0.40 23..Qa5 24.Bb3 (2) (2.91)
00:21:42 12.08 -0.36 23..Qe7 24.Qg4 Kh8 25.Nc4 Rc5 26.Rh5
(6) (2.91) (1171)
00:37:41 13.00 -0.55 23..Qe7 24.Qg4 Kh7 25.Bb3 Rc6 (5) (2.69)
Positions : 381.977.350
+---+---+---+---+---+---+---+---+ Kramnik,V - Anand,V
8 | | | *R| *Q| | *R| *K| |
+---+---+---+---+---+---+---+---+ 00:00:00 00:00:00
7 | | *p| | | | *p| *p| |
+---+---+---+---+---+---+---+---+
6 | *p| | | *p| | *B| | *p| Time infinite
+---+---+---+---+---+---+---+---+ Hash 40 Mb
5 | | *N| | B | *p| p | | Q | Engine Rebel 12
+---+---+---+---+---+---+---+---+ Personality N2.ENG
4 | | | | | p | | | | anti-GM Off
+---+---+---+---+---+---+---+---+ Tactics Off
3 | | | p | | | | p | | Bluff Chess Off
+---+---+---+---+---+---+---+---+ Style Normal
2 | p | p | | N | | | | | Strength Strongest
+---+---+---+---+---+---+---+---+ Search Nullmove
1 | | K | | R | | | | R |
+---+---+---+---+---+---+---+---+ 22.. f4-f5 Be6xd5
a b c d e f g h 23.. Bc4xd5
2rq1rk1/1p3pp1/p2p1b1p/1n1BpP1Q/4P3/2P3P1/PP1N4/1K1R3R b - -
[Event "?"]
[Site "?"]
[Date "??.??.????"]
[Round "?"]
[White "Kramnik,V"]
[Black "Anand,V"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[ECO "B92"]
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e5 7.Nb3 Be7 8.Bg5
Be6 9.Bxf6 Bxf6 10.Qd3 Nc6 11.O-O-O Be7 12.Kb1 O-O 13.Nd5 Bg5 14.h4
Bxh4 15.g3 Bf6 16.Qf3 Bg5 17.Qh5 h6 18.f4 Bf6 19.Nd2 Nd4 20.Bc4 Rc8
21.c3 Nb5 22.f5 Bxd5 23.Bxd5 *
00:00:00 1.00 -2.61 23..Nd4 24.cxd4 exd4 25.Bxb7 (4) (0.00)
00:00:00 1.01 -1.36 23..Nxc3+ 24.bxc3 Rxc3 25.Bxb7 (4) (0.00)
00:00:00 1.03 -0.15 23..Qd7 (1) (0.00)
00:00:00 1.06 -0.13 23..Qb6 (1) (0.00)
00:00:00 2.00 -0.09 23..Qb6 24.Ka1 (2) (0.00)
00:00:00 3.00 0.14 23..Qb6 24.Ka1 Bg5 (3) (0.00)
00:00:00 4.00 -0.49 23..Qb6 24.Ka1 Nc7 25.Nc4 (4) (0.00)
00:00:00 4.12 -0.18 23..Qa5 24.Nb3 Nxc3 25.bxc3 Qxc3 26.Rh2
(6) (0.00) (0)
00:00:01 5.00 -0.19 23..Qa5 24.Nb3 Qa4 25.Bxb7 Rxc3 26.bxc3
(6) (0.00) (0)
00:00:01 6.00 -0.02 23..Qa5 24.Nb3 Qb6 25.c4 Na7 (5) (2.00)
00:00:02 7.00 -0.22 23..Qa5 24.Nb3 Qa4 25.Bxb7 Rc7 26.Bd5
Bg5 (7) (2.00) (2)
00:00:07 8.00 -0.39 23..Qa5 24.Nb3 Qb6 25.Qg6 Qe3 26.Nd2
Rxc3 27.bxc3 (8) (2.75) (6)
00:00:08 8.01 -0.25 23..Qb6 24.Ka1 Qc5 25.Bxb7 Nxc3 26.Rc1
g6 27.Bxc8 (8) (2.75) (7)
00:00:21 9.00 -0.42 23..Qb6 24.Ka1 Qe3 25.Nc4 Qc5 26.g4
Nc7 27.b4 (8) (2.91) (17)
00:00:32 9.01 -0.23 23..Qa5 24.Bb3 Qb6 25.Qg4 Bg5 26.f6
Qe3 (7) (2.91) (21)
00:00:42 9.08 -0.23 23..Bg5 24.Nf3 Qb6 25.Ka1 Bf6 26.Rh2
Nc7 27.Bc4 (8) (2.91) (36)
00:01:34 10.00 -0.21 23..Bg5 24.Nf3 Be3 25.c4 Nc7 26.Bxb7
Rb8 (7) (3.94) (50)
00:03:14 11.00 -0.34 23..Bg5 24.Nf3 Be3 25.Ka1 (4) (2.54)
00:21:08 12.00 -0.39 23..Bg5 24.Nc4 Qe8 25.Rdf1 Qe7 26.a4
(6) (4.96) (847)
00:24:26 12.02 -0.32 23..Qb6 24.Ka1 Qc5 (3) (4.96)
00:34:09 12.07 -0.29 23..Qe7 24.Nf3 Rc7 25.g4 Rfc8 26.Rdg1
(6) (4.96) (1824)
01:05:10 13.00 -0.40 23..Qe7 24.Bb3 Rc7 25.Qg4 Bg5 26.Nf3
(6) (3.46) (2627)
01:18:21 13.02 -0.33 23..Bg5 24.Nc4 Qd7 (3) (3.46)
03:59:08 14.00 -0.31 23..Bg5 24.Ka1 Nc7 25.Bxb7 Rb8 (5) (3.61)
Positions : 3.805.356.357
Nodes per second : 4.294.956.040
Rebel 12.02 Dos, Celeron 500MHZ 40 Mb hash. The nodes per second number is
slightly off the scale...
Eelco
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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