Author: Jorge
Date: 20:25:28 09/08/01
Go up one level in this thread
On September 08, 2001 at 03:30:21, Uri Blass wrote: >On September 07, 2001 at 16:12:50, Aaron Gordon wrote: > >>While analyzing a game between Shirov and Polgar I came across this position.. >> >>[D]rnb2bk1/1pqnr2p/p2pp1P1/6PB/4P3/2N1B3/PPP4P/R2Q1RK1 w - - 0 1 >> >> >>Fritz and most others keep wanting to do gxh7 but the actual move that was >>played was Nd5 and shows a +3 pawn lead after a couple minutes of searching. >> >>Let me know what you guys can come up with... > >Junior7 on p200 needs a long time to find at depth 18 that Nd5 is 2.76 pawns >advantage when gxh7+ is only 2.75 pawns advantage > > >New position >rnb2bk1/1pqnr2p/p2pp1P1/6PB/4P3/2N1B3/PPP4P/R2Q1RK1 w - - 0 1 > >Analysis by Junior 7: > >1.gxh7+ Rxh7 2.g6 Rg7 > +- (1.44) Depth: 3 00:00:00 >1.Qf3! > +- (1.47) Depth: 3 00:00:00 > +- (1.71) Depth: 9 00:00:00 38kN >1.gxh7+ Rxh7 2.Qf3 d5 3.exd5 Bc5 4.g6 Rg7 5.Rae1 Ne5 6.Qf6 exd5 7.Nxd5 > +- (1.90) Depth: 9 00:00:02 295kN > +- (1.90) Depth: 12 00:00:18 2503kN >1.Qf3 Bg7 2.gxh7+ Kh8 3.Bg6 Nc6 4.Qh5 Nce5 5.Be8 Qc4 > +- (2.05) Depth: 12 00:00:21 2877kN > +- (2.16) Depth: 17 01:07:50 499508kN >1.gxh7+ Rxh7 2.Bg6 Rh4 3.Qf3 Qd8 > +- (2.36) Depth: 17 01:29:13 664289kN > +- (2.75) Depth: 18 04:28:12 2020096kN >1.Nd5 exd5 2.Qxd5+ Kh8 3.gxh7 Rxh7 4.Bg6 Bg7 5.Bxh7 Qd8 6.Bf5 Ne5 7.Qb3 Nbc6 >8.Rad1 Bxf5 9.exf5 > +- (2.76) Depth: 18 06:48:09 3096484kN > +- (2.76) Depth: 18 06:48:09 3096484kN > >Uri This is ChessTiger14 variation using 96 MB Hashtable on PIII 667: TIME SCORE DEPTH NODES VARIATION 00:00:00.0 0.76 5 43377 Qd1-f3 Kg8-h8 Be3-d4+ e6-e5 Nc3-d5 Qc7-c4 00:00:00.4 0.88 6 65530 Qd1-f3 Kg8-h8 Be3-d4+ e6-e5 Nc3-d5 Qc7-c4 Bd4-c3 00:00:01.8 1.06 7 174205 Qd1-f3 Qc7-c4 Ra1-d1 Re7-g7 g6xh7+ Kg8xh7 Bh5-f7 Kh7-h8 Qf3-h5+ Rg7-h7 00:00:02.7 0.98 8 345255 Qd1-f3 Qc7-c4 Ra1-d1 Kg8-h8 g6xh7 Re7xh7 g5-g6 Rh7-g7 Be3-d4 00:00:05.6 1.14 9 846796 Qd1-f3 Nb8-c6 g6xh7+ Re7xh7 Bh5-g6 Rh7-h4 Qf3-f7+ Kg8-h8 Rf1-f4 Rh4-h3 Qf7xe6 Rh3xe3 00:00:06.7 1.88 9 983858 Nc3-d5 00:00:07.9 1.14 9 1280062 Qd1-f3 Nb8-c6 00:00:11.4 1.18 10 1739105 Qd1-f3 Nb8-c6 g6xh7+ Re7xh7 Bh5-g6 Rh7-h4 Bg6-f7+ Kg8-h8 Bf7xe6 Bf8-g7 Qf3-f2 Rh4-h7 g5-g6 00:00:13.1 1.22 10 1957353 Nc3-d5 e6xd5 Qd1xd5+ Kg8-h8 g6xh7 Re7-g7 Be3-d4 Kh8xh7 g5-g6+ Kh7-h8 Bh5-g4 Nd7-f6 Rf1xf6 00:00:40.7 1.22 11 6155055 Qd1-f3 Bf8-g7 g6xh7+ Kg8-h8 g5-g6 Qc7-a5 Qf3-h3 Bg7xc3 b2xc3 Qa5xc3 Ra1-d1 Nd7-f6 Rd1-d3 Qc3xc2 00:01:15.5 1.28 12 12537956 Qd1-f3 Bf8-g7 g6xh7+ Kg8-h8 g5-g6 Nb8-c6 Ra1-d1 Qc7-a5 Qf3-h3 Nd7-f6 Bh5-f3 Qa5-e5 Be3-h6 00:04:03.9 1.32 12 46248901 g6xh7+ Kg8-h8 g5-g6 Bf8-g7 Qd1-d2 Nd7-f6 e4-e5 d6xe5 Bh5-f3 Nb8-c6 Nc3-e4 Nc6-d4 Ne4xf6 Bg7xf6 00:08:24.4 1.86 13 93825797 g6xh7+ Re7xh7 Bh5-g6 Rh7-h4 Qd1-f3 Qc7-d8 Bg6-f7+ Kg8-g7 Bf7xe6 Kg7-h8 Qf3-g3 Rh4-h7 g5-g6 Rh7-h5 Rf1-f7 00:08:49.8 1.98 13 97868712 Nc3-d5 e6xd5 Qd1xd5+ Kg8-h8 g6xh7 Re7xh7 00:09:43.5 1.98 13 107357712 Nc3-d5 e6xd5 Qd1xd5+ Kg8-h8 g6xh7 Re7xh7 GT2 took alot longer to find the move: TIME SCORE DEPTH NODES EVALUATION 00:00:00.3 3.80 6 32504 gxh7+ Rxh7 g6 Rg7 Bd4 Ne5 Rf6 00:00:00.1 4.38 6 38116 gxh7+ Rxh7 Qf3 Qc4 g6 Re7 Rad1 00:00:00.2 3.94 7 61340 gxh7+ Rxh7 Qf3 Qd8 Bf7+ Kh8 g6 Ne5 Bd4 Qg5+ Kh1 00:00:01.0 4.16 8 163204 gxh7+ Rxh7 Qf3 Qd8 g6 Rg7 Bh6 Ne5 Qf2 Nxg6 Bxg7 Kxg7 Bxg6 Kxg6 00:00:05.7 4.26 9 839436 Qf3 Qd8 gxh7+ Rxh7 Bf7+ Kh8 Bxe6 Bg7 g6 Ne5 Qf5 Bxe6 Qxe6 00:00:08.6 4.14 10 1454373 Qf3 Qd8 gxh7+ Rxh7 Bf7+ Kh8 Bxe6 Bg7 g6 Ne5 Qf5 Bxe6 Qxe6 00:00:17.2 4.04 11 3310487 Qf3 Qd8 gxh7+ Rxh7 Bf7+ Kg7 Bxe6 Ne5 Qf6+ Qxf6 gxf6+ Kh8 Bxc8 Nbc6 Be6 Rh4 00:00:45.3 3.76 12 8632471 Qf3 Qd8 gxh7+ Rxh7 Bf7+ Kh8 Bxe6 Bg7 g6 Ne5 Qf5 Bxe6 Qxe6 Rh4 h3 00:01:16.5 3.80 12 14667322 gxh7+ Rxh7 Bg6 Rh4 Qf3 Qd8 Bf7+ Kh8 Qg3 Rh7 g6 Rh4 Bf2 Rh6 Bd4+ Bg7 00:03:30.3 4.18 13 41126378 gxh7+ Rxh7 Bg6 Rh4 Qf3 Qd8 Bf7+ Kg7 Bxe6 Ne5 Qf6+ Qxf6 gxf6+ Kh7 Bxc8 b5 Bf5+ 00:05:11.0 4.18 13 62150995 gxh7+ Rxh7 Bg6 Rh4 Qf3 Qd8 Bf7+ Kg7 Bxe6 Ne5 Qf6+ Qxf6 gxf6+ Kh7 Bxc8 b5 Bf5+ Kh8 Rad1 00:00:00.3 3.94 7 39857 gxh7+ Rxh7 Qf3 Qd8 Bf7+ Kh8 g6 Ne5 Bd4 00:00:00.0 3.94 7 65198 gxh7+ Rxh7 Qf3 Qd8 00:00:01.3 3.74 8 143286 gxh7+ Rxh7 Qf3 Qd8 Bf7+ Kh8 g6 Ne5 Bd4 Qg5+ Kh1 00:00:02.9 4.10 9 396455 gxh7+ Rxh7 Qf3 Qd8 Bf7+ Kh8 Bxe6 Bg7 Qf5 Qf8 Qxf8+ Nxf8 Bxc8 00:00:04.6 4.10 10 849038 gxh7+ Rxh7 Qf3 Qd8 00:00:14.4 4.12 11 2800654 gxh7+ Rxh7 Qf3 Qd8 Bf7+ Kh8 Bxe6 Bg7 Qf5 Nb6 g6 Bxe6 Qxe6 Bxc3 bxc3 00:00:56.6 4.04 12 10985097 gxh7+ Rxh7 Qf3 Qd8 Bf7+ Kg7 Bxe6 Ne5 Qf6+ Qxf6 gxf6+ Kh8 Bxc8 Nbc6 Be6 Rh4 Rad1 00:03:31.0 3.70 13 41526549 gxh7+ Rxh7 Qf3 Qd8 Bf7+ Kh8 Bxe6 Bg7 Qf5 Rh4 Rad1 Qf8 Qg6 Qe7 Rf7 00:15:45.2 3.68 14 187840156 gxh7+ Rxh7 Bg6 Ne5 Nd5 exd5 Qxd5+ Rf7 Bxf7+ Kg7 g6 Bh3 Rf2 Qd7 Rf4 Qe7 Qd4 Qg5+ 00:20:23.6 4.34 14 247657332 Nd5 exd5 Qxd5+ Kh8 gxh7 Rxh7 Bg6 Bg7 Bxh7 Qd8 g6 Nf6 Qg5 Bh3 Rf4 00:22:26.9 4.34 14 274412614 Nd5 exd5 Qxd5+ Kh8 gxh7 Rxh7 Bg6 Bg7 Bxh7 Qd8 g6 Nf6 Qg5 Bh3 Rf4
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