Author: Uri Blass
Date: 07:00:53 01/28/03
Go up one level in this thread
On January 28, 2003 at 08:55:00, Peter Berger wrote: >On January 28, 2003 at 07:18:26, Jorge Pichard wrote: > >>On January 28, 2003 at 06:36:18, Peter Berger wrote: >> > >>>That's IMHO the best conclusion I read about game 1: >>> >>>"All I can say is that if this match comes down to a competition of Kasparov and >>>Dokhoian's preparation against Alterman's, Junior is going to be Deep all right. >>>Deep-sixed, Deep trouble, and in Deep doo-doo." >> >First, I am pretty convinced that Junior will also play much more successful >games in this match. > >>The solution is simple, instead of using a huge Opening Book against Kasparov, >>Alterman should only include a special Opening Book where the outcome has been >>either Draw or win agains Kasparov. Remember any draw in the past against >>Kasparov has to be considered an excellent Opening choice, since at his level to >>come out even from the Opening Stage and be able to draw against him is an >>excellent accomplishment. There are hundreth of games against Karpov, Kramnik, >>Anand and Shirov where they can collect Openings used against Kasparov. >>Therefore, a special Opening Book with those games should NOT be that hard to >>collect. >> > >I don't think this would work as you expect it to do at all. Think of openings >like the Kings Indian which would be very prominent in your book - Junior >wouldn't be happy to have to play it with the black pieces I suppose :). > >The problem is not so much with selection of moves that have been played in >games but with moves that have never been played but are well-known anyway. Not >trusting bookmoves solves only one half of the problem ( given that the engine >can find better ones by itself, which is also not so clear). >Much information is in published (or unpublished, ouch) analysis. If you look in >an online database like chesslive there are many lines that were once popular >but were refuted later or went out of fashion. Sometimes the reasons are obvious >- there are one or two games that spoilt the system and it should theoretically >be possible to get sth like that with technical means. > >But sometimes it's different - a line just vanishes and if you look at the games >played with it there is no obvious reason. I expect that in this case often >either analysis published or homework showed problems that were never revealed >in games. > >Although not exactly fitting, I like this article very much: >http://www.chesscafe.com/text/kibitz24.txt - which I studied yesterday evening. >It's just a tiny example but I assume in the workbooks of masters there is >_much_ more like it. > >Regards, >Peter I can only say that axb5 is suggested by chess programs. I already read it in this forum few weeks ago when a player described his wins against chess programs with this move so the fact that axb5 is good is not news from yesterday. Old Deep Fritz6 on old hardware(p850) has no problem to find it and Junior7 can find it even faster. I also think that authors of opening books should care to use computers program to analyze every position in the books and give notes about moves that are suggested by programs even if they think that the moves are bad. Here is the analysis of Deep Fritz and Junior7(Fritz8 is not installed in the p850 that I use now but I guess that it also can find axb5). New game - Deep Fritz [D]5rk1/6pp/p1pbr3/1p1n1p2/P2P2b1/1BPQB1Pq/1P1N1P1P/R3R1K1 w - f6 0 1 Analysis by Deep Fritz: 19.Bxd5 cxd5 20.axb5 ± (1.19) Depth: 1/6 00:00:00 19.Bxd5 cxd5 20.axb5 axb5 21.Qxb5 ± (1.19) Depth: 2/6 00:00:00 19.Bxd5 cxd5 20.axb5 f4 +- (1.41) Depth: 3/15 00:00:00 1kN 19.Bxd5 cxd5 20.axb5 f4 21.gxf4 Bxf4 ± (1.16) Depth: 4/13 00:00:00 3kN 19.Bxd5-- ± (0.84) Depth: 5/19 00:00:00 18kN 19.Bxd5-- cxd5 20.axb5 f4 21.gxf4 Bxf4 22.Nf1 ± (0.72) Depth: 5/24 00:00:00 23kN 19.Bg5! ± (0.75) Depth: 5/25 00:00:00 53kN 19.Bg5! Rxe1+ 20.Rxe1 Qh5 21.f4 bxa4 ± (0.78) Depth: 5/25 00:00:00 61kN 19.Bg5 Rxe1+ 20.Rxe1 Qh5 21.f4 Re8 22.Rxe8+ Qxe8 ± (0.91) Depth: 6/26 00:00:00 131kN 19.Bg5-- ² (0.59) Depth: 7/26 00:00:00 450kN 19.Bg5-- f4 20.Rxe6 Bxe6 21.axb5 fxg3 22.fxg3 axb5 ² (0.56) Depth: 7/28 00:00:00 592kN 19.Qf1! ² (0.59) Depth: 7/28 00:00:01 1087kN 19.Qf1! Qxf1+ 20.Nxf1 Kf7 21.axb5 axb5 22.Ra6 Rc8 23.Nd2 ± (0.78) Depth: 7/28 00:00:01 1286kN 19.Qf1 Qxf1+ 20.Nxf1 Kf7 21.axb5 axb5 22.Ra7+ Kg6 23.Ra6 Rc8 24.Nd2 ± (0.78) Depth: 8/27 00:00:02 1600kN 19.Qf1 Qxf1+ 20.Nxf1 Kf7 21.axb5 axb5 22.Ra7+ Kg6 23.Ra6 Rc8 24.Nd2 Kf6 ± (0.78) Depth: 9/29 00:00:04 3384kN 19.Bg5! ± (0.81) Depth: 9/30 00:00:05 4220kN 19.Bg5! f4 20.Rxe6 Bxe6 21.axb5 fxg3 22.fxg3 axb5 23.Ra6 ± (0.91) Depth: 9/30 00:00:07 5546kN 19.Bg5-- ² (0.59) Depth: 10/32 00:00:12 9268kN 19.Bg5-- ² (0.59) Depth: 10/32 00:00:13 10031kN 19.axb5! ² (0.63) Depth: 10/32 00:00:16 12163kN 19.axb5! f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Ra8 23.Bc4 Bxd2 24.Qxd2 Ra7 ² (0.69) Depth: 10/32 00:00:17 13145kN 19.Qf1! ± (0.72) Depth: 10/32 00:00:19 14648kN 19.Qf1! bxa4 20.Rxa4 f4 21.Bxf4 Qxf1+ 22.Rxf1 Bxf4 23.gxf4 Re2 24.Nc4 Rb8 ± (0.78) Depth: 10/32 00:00:22 16947kN 19.Qf1 bxa4 20.Rxa4 f4 21.Qxh3 Bxh3 22.Rxa6 fxe3 23.fxe3 Rc8 24.e4 Kf7 ² (0.63) Depth: 11/33 00:00:32 23828kN 19.Qf1 Qh5 20.f4 Kh8 21.Bxd5 cxd5 22.axb5 Qe8 23.Qd3 Qxb5 24.Qxb5 axb5 ² (0.69) Depth: 12/34 00:01:26 64342kN 19.axb5! ± (0.72) Depth: 12/34 00:01:47 80440kN 19.axb5! f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Bxd2 23.Qxd2 Qf5 24.Bc4 Ra8 ± (0.88) Depth: 12/34 00:02:03 92649kN 19.axb5 f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Qg4 23.a7 Ra8 24.Qc4 ± (0.81) Depth: 13/36 00:03:22 155647kN 19.Qf1! ± (0.84) Depth: 13/38 00:04:25 204252kN 19.Qf1! Qh5 20.f4 Kh8 21.Bxd5 cxd5 22.axb5 Qe8 23.Kf2 axb5 ± (0.88) Depth: 13/39 00:05:08 236807kN 19.Qf1 Qh5 20.f4 bxa4 21.Rxa4 Rb8 22.Bf2 Re2 23.Rxa6 Rxd2 24.Bxd5+ cxd5 ± (0.75) Depth: 14/36 00:07:34 348564kN 19.axb5! ± (0.78) Depth: 14/39 00:09:19 434272kN 19.axb5! f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxa6 Bxd2 23.Qxd2 Nc7 24.Bxe6+ Qxe6 ± (0.88) Depth: 14/40 00:11:29 537347kN (blass, tel-aviv 28.01.2003) New game - Deep Fritz 5rk1/6pp/p1pbr3/1p1n1p2/P2P2b1/1BPQB1Pq/1P1N1P1P/R3R1K1 w - f6 0 1 Analysis by Junior 7: 19.Qxf5 Bxf5 20.Bxd5 cxd5 21.axb5 -+ (-5.87) Depth: 3 00:00:00 19.axb5 f4 20.Bxf4 Nxf4 ² (0.43) Depth: 3 00:00:00 1kN 19.axb5 f4 = (0.13) Depth: 6 00:00:00 12kN 19.Bxd5 cxd5 20.axb5 f4 21.gxf4 Bxf4 = (0.25) Depth: 6 00:00:00 14kN 19.Bxd5 cxd5 20.Bg5 Rfe8 21.Rxe6 Rxe6 22.f3 Bh5 23.axb5 = (0.02) Depth: 9 00:00:00 126kN 19.axb5 f4 20.Bxf4 Bxf4 21.bxc6 Bxd2 22.Bxd5 Bxe1 23.Rxe1 Kh8 24.Bxe6 ² (0.28) Depth: 9 00:00:00 465kN 19.axb5 f4 20.Bxf4 Bxf4 21.Rxe6 Bxe6 22.bxc6 Nc7 23.Bxe6+ Nxe6 24.Rxa6 Bxd2 25.Qxd2 ² (0.47) Depth: 12 00:00:10 7321kN 19.axb5 axb5 20.Qf1 f4 21.Bxf4 Bxf4 22.Rxe6 Qxf1+ 23.Nxf1 Bxe6 24.gxf4 b4 25.cxb4 Rxf4 = (0.24) Depth: 14 00:01:05 43472kN 19.axb5 axb5 20.Bxd5 cxd5 21.Qxb5 f4 22.Bxf4 Bxf4 23.Rxe6 Bxe6 24.gxf4 Qg4+ 25.Kh1 Qxf4 26.Qd3 Qxf2 27.Rf1 Qxd2 28.Qxd2 = (0.24) Depth: 16 00:04:12 157699kN (blass, tel-aviv 28.01.2003) Uri
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