Author: John Merlino
Date: 13:29:55 07/15/02
Go up one level in this thread
On July 15, 2002 at 15:44:55, Gian-Carlo Pascutto wrote: >[D]r2qrbk1/5pp1/p1bp3p/1p2p3/1P2P1Q1/2P4P/P1B2PP1/R3RNK1 b - - 0 21 > >Sjeng played d5, the same move was played by Ponomariov earlier >this year in Linares against Adams. Alex Kure criticised it as being >premature (citing Adams). Sjeng got into a worse position and Brutus >slowly worked its way through a win. > >How long does your favorite program need to avoid it? Chessmaster 9000, on a PIII-600, does not see a better move than d5 after five minutes.... Time Depth Score Positions Moves 0:00 1/3 -0.26 536 21...d5 22.exd5 Bxd5 23.Rad1 0:00 1/3 -0.29 786 21...Bd7 22.Qf3 Be6 23.Ne3 0:00 1/3 -0.40 1163 21...Bb7 22.Ne3 Rc8 0:00 1/4 -0.59 3650 21...Bb7 22.Bb3 Rc8 23.Qf5 Qc7 0:00 1/5 -0.30 9587 21...Bb7 22.Ne3 Rc8 23.Nf5 Qf6 0:00 1/5 -0.44 12115 21...Rc8 22.Bb3 Bb7 23.Qf3 Qc7 24.Ng3 0:00 1/6 -0.44 23413 21...Rc8 22.Bb3 Bb7 23.Qf3 Qc7 24.Ng3 0:01 1/7 -0.25 79357 21...Rc8 22.Bb3 Qg5 23.Qxg5 hxg5 24.Rac1 Be7 25.Rcd1 Bb7 0:03 1/8 -0.19 210217 21...Rc8 22.Bb3 Bb7 23.Qf3 Qd7 24.Ng3 Qc7 25.Rad1 0:05 1/8 -0.32 320824 21...d5 22.Ne3 d4 23.Rad1 Rc8 24.Nf5 Qf6 25.cxd4 Bxb4 0:14 1/9 -0.18 878657 21...d5 22.exd5 Qxd5 23.Be4 Qc4 24.Qf3 Rac8 25.Nd2 Bxe4 26.Nxe4 0:32 1/10 -0.21 2140736 21...d5 22.exd5 Qxd5 23.Bb3 Qd6 24.Rad1 Qc7 25.Qg6 Bb7 26.Ne3 Rad8 1:27 2/11 -0.10 5894732 21...d5 22.exd5 Qxd5 23.Ne3 Qe6 24.Qxe6 Rxe6 25.Bb3 Rd6 26.Ng4 e4 27.Rad1 Rxd1 28.Rxd1 3:47 3/12 0.01 15951467 21...d5 22.exd5 Qxd5 23.Ne3 Qe6 24.Qxe6 Rxe6 25.Rad1 Ree8 26.Nd5 Rad8 27.Be4 f5 >[D]r2q1rk1/p2bbppp/1pn1p3/4P3/2pP1N2/2P5/P1B2PPP/1RBQ1RK1 w - - 0 15 > >Brutus played Qh5 and went on to win after the double piece >sacrifice. I had a discussion with Tony Werten, who claimed >you had to search really really deep to see the compensation. >I think you just need good kingsafety :) > >How long to get Qh5, a winning score and see the double piece sac >(Nxg6 Bxg6) and KEEP it? CM9000 needs 2:34 to see it and does keep it for the next PV: Time Depth Score Positions Moves 0:00 1/3 0.74 1385 15.Qh5 h6 16.Qe2 Na5 17.Be4 0:00 1/4 0.78 4209 15.Qh5 h6 16.d5 Na5 17.Be3 Qc7 0:00 1/4 0.87 7218 15.Qe2 Rc8 16.Qe4 g6 17.Qf3 0:00 1/5 0.79 20729 15.Qe2 b5 16.Qe4 g6 17.Nh5 Qa5 18.Bd2 0:00 1/5 0.88 28325 15.Qh5 h6 16.Qe2 Rc8 17.Qe4 f5 18.exf6ep Rxf6 0:01 1/6 1.01 77427 15.Qh5 g6 16.Qh6 Re8 17.Nh5 Bf8 18.Nf6+ Qxf6 19.exf6 Bxh6 20.Bxh6 0:02 1/6 1.13 121236 15.Nh5 f5 16.exf6ep Bxf6 17.Nxf6+ Qxf6 18.Qh5 g6 19.Qh6 0:02 1/7 1.10 154354 15.Nh5 f5 16.exf6ep Bxf6 17.Nxf6+ Qxf6 18.Qh5 h6 19.Qe2 0:06 1/8 1.14 381495 15.Nh5 g6 16.Qe2 Na5 17.Qg4 Kh8 18.Bh6 Rg8 19.Ng3 0:25 1/9 1.28 1577384 15.Nh5 g6 16.Qf3 f5 17.exf6ep Bxf6 18.Nxf6+ Qxf6 19.Qe2 Rac8 20.Bh6 0:47 1/10 1.28 3095181 15.Nh5 g6 16.Qf3 f5 17.exf6ep Bxf6 18.Nxf6+ Qxf6 19.Qe2 Rac8 20.Bh6 1:22 1/10 1.61 5496947 15.Qh5 h6 16.Qf3 g6 17.Nh5 Kh7 18.Nf6+ Bxf6 19.exf6 Rh8 20.Re1 Qc7 21.Bf4 2:34 2/11 1.75 10841095 15.Qh5 g6 16.Nxg6 hxg6 17.Bxg6 fxg6 18.Qxg6+ Kh8 19.Qh5+ Kg8 20.Bh6 Rf7 21.Qg6+ Kh8 22.Qxf7 Qg8 23.Qf3 Qg6 5:18 3/12 1.57 24452700 15.Qh5 g6 16.Nxg6 hxg6 17.Bxg6 fxg6 18.Qxg6+ Kh8 19.Qh5+ Kg8 20.Bh6 Rf7 21.Qg6+ Kh8 22.Qxf7 Qg8 23.Qh5 Qh7 24.Rfe1 Rg8 >[D]r4rk1/5p1p/p1pb1n2/1p3bp1/3PR3/1BP2PPq/PP1NQ2P/R1B3K1 b - - 0 18 > >Junior-Sjeng. Again Adams and Ponomariov in Linares 2002! Black >must not accept the rook sacrifice. How long to avoid it? CM9000 never even considers it: Time Depth Score Positions Moves 0:00 1/4 -0.39 16753 18...a5 19.Re3 a4 20.Bd1 Nd5 0:00 1/5 0.00 33126 18...a5 19.a4 Nxe4 20.Nxe4 Bxe4 21.fxe4 0:01 1/5 -0.08 41075 18...Rad8 19.Qf2 Nxe4 20.Nxe4 h6 21.Bd2 0:01 1/5 -0.20 80753 18...h6 19.a4 Nxe4 20.Nxe4 Be6 0:02 1/6 -0.15 139533 18...h6 19.Re3 Nd5 20.Bxd5 cxd5 21.a4 Bd7 0:05 1/7 0.20 355933 18...h6 19.Re3 Nd5 20.Ne4 Nxe3 21.Bxe3 Rad8 0:10 1/7 0.17 681145 18...Rad8 19.Re3 Nd5 20.Ne4 Nxe3 21.Bxe3 Bxe4 22.fxe4 0:17 1/7 0.13 1166752 18...Qh6 19.a4 Nxe4 20.Nxe4 Bxe4 21.Qxe4 Rae8 22.Qxc6 Re2 0:20 1/8 0.13 1324629 18...Qh6 19.a4 Nxe4 20.Nxe4 Be7 21.h4 Bxe4 22.Qxe4 Qd6 0:33 1/8 0.00 2251424 18...h6 19.Re3 Nd5 20.Bxd5 cxd5 21.a4 Bd7 22.axb5 axb5 0:48 1/9 0.08 3353542 18...h6 19.Re3 Nd5 20.Ne4 Nxe3 21.Bxe3 Be7 22.Nf2 Qh5 23.Re1 1:09 1/9 -0.01 4836877 18...c5 19.Qe3 Bxe4 20.Nxe4 Nxe4 21.fxe4 Be7 22.Bd5 Rac8 23.Qf2 cxd4 24.cxd4 1:55 1/10 0.22 8517868 18...c5 19.Qe3 Bxe4 20.Nxe4 Nxe4 21.fxe4 Be7 22.Bd5 Rac8 23.Bd2 cxd4 24.Qxd4 3:37 1/10 0.08 15650790 18...h6 19.Re3 Nd5 20.Bxd5 cxd5 21.a4 Bd7 22.b3 Rfe8 23.Ba3 Rxe3 24.Qxe3 >[D]r4rk1/5p1p/p1pb1n2/1p3bp1/3PR3/1BP2PPq/PP1NQ2P/R1B3K1 b - - 0 18 > >Sjeng played Qxg7 and Junior answered from book. I think I can >omit the rest of the story. > >How long to avoid Qxg7? I got this one on the "Fix" post.... >[D]2rq1rk1/pb1pn1pp/1p2p3/2pn1p2/3P2P1/P1PBPN1P/1P1NQP1R/1K1R4 b - - 0 15 > >GM Alterman - Sjeng Anti-Human > >Black plays Nxc3!! > >Anyone else find this? Well, maybe a variation on it. CM9000 wants to play 15...cxd4 first, then after 16.cxd4 THEN Nc3+: Time Depth Score Positions Moves 0:00 1/3 -0.03 2214 15...d6 16.gxf5 Nxf5 17.Bb5 cxd4 18.Nxd4 Nxd4 19.exd4 0:00 1/4 -0.04 4865 15...d6 16.gxf5 exf5 17.Bb5 Ng6 0:00 1/5 -0.01 29051 15...d6 16.Bb5 Ng6 17.gxf5 Rxf5 0:00 1/5 -0.04 37069 15...cxd4 16.cxd4 d6 17.gxf5 Nxf5 18.Ne4 0:01 1/6 -0.14 63444 15...cxd4 16.cxd4 d6 17.gxf5 exf5 18.Bc4 Qd7 0:03 1/7 -0.11 147452 15...cxd4 16.cxd4 Qc7 17.gxf5 Nxf5 18.Ka1 Nf6 0:06 1/8 -0.19 365748 15...cxd4 16.cxd4 Qc7 17.Rhh1 d6 18.Rc1 Qd7 19.Bb5 0:26 1/9 -0.30 1598763 15...cxd4 16.cxd4 Nc3+ 17.bxc3 Nd5 18.Kb2 Nxc3 19.Qf1 Nxd1+ 20.Qxd1 Qc7 21.Ka1 0:44 1/10 -0.26 2748814 15...cxd4 16.cxd4 Nc3+ 17.bxc3 Nd5 18.Rc1 Nxc3+ 19.Rxc3 Rxc3 20.gxf5 Qc7 21.Rh1 Rxa3 22.Rc1 1:58 2/11 -0.26 7803731 15...cxd4 16.cxd4 Nc3+ 17.bxc3 Nd5 18.Rc1 Nxc3+ 19.Rxc3 Rxc3 20.Kb2 Qc7 21.Ne5 Rc1 22.Bc4 jm
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