Author: David Rasmussen
Date: 03:39:19 02/03/03
Go up one level in this thread
On February 02, 2003 at 17:17:00, John Merlino wrote:
>
>Congratulations! That pawn behind enemy lines after 19...axb2+ was very
>impressive. A few questions/comments:
>
>When did Chezzz leave book? 6...Ng4 appears to be a poor move, and I can find no
>game in which it is played. 6...h6 seems to be statistically best for Black in
>this position, although 6...c5 is somewhat more common.
>
6... Ng4 is exactly Chezzz's first move out of book :)
I admit it looks weird. Chezzz is very much in doubt about what to do here, it
shifts between many different moves:
time nodes depth score pv
00:00:00.12 45kn 06/07/19 -0.131 6... Bg4 7. Be2 Nc6 8. O-O e5
9. dxe5 dxe5 (45214)
00:00:00.17 67kn 06/07/19 -0.122 6... Bd7 7. Be2 h6 8. Bxf6 exf6
9. O-O (67565)
00:00:00.20 78kn 06/07/21 -0.092 6... h6 7. Bf4 Nc6 8. Be2 Nh5
9. Be3 (78384)
00:00:00.25 93kn 06/07/21 ---------------------------------------------------
00:00:00.31 119kn 07/07/18 +0.033 6... h6 7. Bf4 Nc6 8. Bd3 Nh5
9. Be3 Bd7 (119744)
00:00:00.48 206kn 07/09/20 ---------------------------------------------------
00:00:00.75 337kn 08/09/23 -0.182 6... h6 7. Bf4 Nc6 8. Be2 e5
9. dxe5 Nh5 10. Be3 dxe5 (337205)
00:00:00.90 414kn 08/11/23 -0.181 6... Bg4 7. Be2 Nc6 8. O-O Nd7
9. Be3 Nb6 10. Qd3 (414671)
00:00:01.45 678kn 08/11/23 -0.166 6... Ng4 7. Be2 Nc6 8. O-O Bd7
9. Bf4 (678085)
00:00:02.12 1016kn 08/11/23 ---------------------------------------------------
00:00:02.56 1246kn 09/11/23 -0.222 6... Ng4 7. Be2 h6 8. Bd2 Nc6
9. O-O Bd7 10. Nb5 e5 (1246293)
00:00:03.10 1553kn 09/11/23 -0.171 6... h6 7. Bf4 Nc6 8. Be2 g5
9. Be3 Ng4 10. O-O Nxe3
11. fxe3 (1553974)
00:00:04.14 2068kn 09/11/23 -0.167 6... Bd7 7. Be2 h6 8. Bd2 Nc6
9. O-O e5 10. Be3 Ng4 (2068097)
00:00:06.53 3129kn 09/12/23 ---------------------------------------------------
00:00:07.87 3828kn 10/12/25 -0.191 6... Bd7 7. Be2 Nc6 8. d5 Nb4
9. O-O Ng4 10. Nd4 Ne5
11. Ncb5 (3828874)
00:00:13.98 6755kn 10/14/28 ---------------------------------------------------
00:00:17.67 8717kn 11/15/28 -0.175 6... Bd7 7. Be2 Ng4 8. h3 Nf6
9. e5 Ne8 10. O-O Nc6
11. Bf4 Bf5 (8717722)
00:00:23.57 11Mn 11/15/28 -0.132 6... h6 7. Bf4 Nc6 8. Be2 Ng4
9. O-O e5 10. dxe5 dxe5
11. Bd2 Be6 (11893037)
00:00:29.79 15Mn 11/16/29 ---------------------------------------------------
00:00:43.96 22Mn 12/17/30 -0.228 6... h6 7. Bf4 Ng4 8. Be2 Bd7
9. O-O Nc6 10. d5 Nce5 (22385994)
00:01:00.62 31Mn 12/17/30 -0.216 6... Bg4 7. Be2 Nc6 8. O-O Nd7
9. d5 Nb4 10. Be3 Bxf3
11. Bxf3 Bxc3 12. bxc3 (31149357)
00:01:05.73 33Mn 12/18/30 -0.215 6... Ng4 7. Be2 Nc6 8. h3 Nf6
9. O-O Bd7 10. e5 Nh5
11. exd6 cxd6 12. Nd5 (33732387)
00:01:43.62 53Mn 12/19/30 ---------------------------------------------------
From the PV, I guess Chezzz thinks that it's better for white here to castle
kingside rather than queenside. And since it expects white to do h3, to chase
away the knight, this weakens the white kingside a bit. I don't know if this is
justified or not, but I think that's why.
>21...Bf5 wins handily, according to Chessmaster 9000. The eval is more than 2
>points in Black's favor, whereas after Chezzz's 21...Bd7 the eval is almost one
>point less (although I'm sure Chezzz would be winning with either move).
>
Chezzz finds it too, although it takes 4:30 :) And I don't think Chezzz thought
that long in the game. If Chessmaster finds it in much shorter time, I'm not
surprised. It is because it is a much stronger program generally, and
specifically a much more effecient searcher. Maybe it's even because of some
specific extension etc. ?
time nodes depth score pv
00:00:00.13 50kn 05/11/14 ---------------------------------------------------
00:00:00.36 155kn 06/13/17 +1.004 21... Bd7 22. Rb1 Qa8 23. Qb4 Qa2+
24. Kc2 Ra8 (155787)
00:00:00.41 172kn 06/13/17 ---------------------------------------------------
00:00:00.85 414kn 07/15/20 +1.337 21... Bd7!
00:00:01.14 594kn 07/14/17 +1.567 21... Bd7 22. Rb1 Qa8 23. Qb4 Bxb5
24. cxb5 Qa2+ 25. Kc2 Qxd5 (594311)
00:00:01.46 713kn 07/15/19 ---------------------------------------------------
00:00:04.38 2170kn 08/14/22 +0.933 21... Bd7 22. Qb4 Qa8 23. Nc3 Rxd1
24. Rxd1 h6 25. Nge4 (2170286)
00:00:05.19 2526kn 08/17/22 ---------------------------------------------------
00:00:08.41 4249kn 09/19/23 +1.266 21... Bd7!
00:00:10.94 5400kn 09/20/21 ---------------------------------------------------
00:00:26.44 13Mn 10/20/23 +0.933 21... Bd7!
00:00:26.44 13Mn 10/20/23 ---------------------------------------------------
00:00:54.52 27Mn 11/23/30 +1.086 21... Bd7 22. Qb4 Qa8 23. Nc3 Qa7
24. Rdf1 Ra8 25. Kc2 Ra3
26. Nge4 Bxc3 27. Nxc3 (27561539)
00:00:59.75 30Mn 11/23/30 ---------------------------------------------------
00:01:35.35 48Mn 12/25/28 +1.086 21... Bd7 22. Qb4 Qa8 23. Nc3 Qa7
24. Rdf1 Ra8 25. Kc2 Ra3
26. Nge4 Bxc3 27. Nxc3 (48504654)
00:04:30.64 145Mn 12/26/30 +1.419 21... Bf5!
00:05:13.71 170Mn 12/25/31 +1.791 21... Bf5 22. Bxf5 Qa8 23. Rxa1 bxa1=N+
24. Rxa1 Qxa1 25. Ne6 fxe6
26. Bxe6+ Kh8 27. Nc3 Qf1
28. f3 (170560163)
00:05:18.85 173Mn 12/25/31 ---------------------------------------------------
00:07:34.47 251Mn 13/29/30 +2.021 21... Bf5 22. Bxf5 Qa8 23. Rxa1 bxa1=N+
24. Rxa1 Qxa1 25. Ne6 fxe6
26. Bxe6+ Kh8 27. Nc3 Qf1
28. f3 Ra8 (251247820)
>Well done!
>
Thanks!
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.