Author: Bryan Hofmann
Date: 04:42:04 03/31/04
Go up one level in this thread
On March 31, 2004 at 06:31:28, Tord Romstad wrote: >I just completed a 100-game blitz match between Gothmog 0.4.7 and Crafty 19.9 >(yes, I know it is not the most recent version). In one of the games, the >following position arised: > >[D]r2qr3/4bpkp/p2p2pN/1p1P4/2pNP3/1b5P/1P1Q1PP1/R3R1K1 w - - > >Here, Gothmog surprised me (and Crafty) by playing the knight sac Nxf7!?. It >plays this after only 7 plies and 1 second, almost certainly as a speculative >sac, but still keeps it with a +1 score after 20 minutes and 16 plies. In >the game, Gothmog quickly got a winning attack after 24. Nxf7 Kxf7 25. Ne6 Qc8 >26. Qh6 Bf8 27. Qxh7+ Kf6 28. Re3. > >Which other engines like Nxf7? Is the sac correct? Tao 5.6 1 00:00 -2.66 Nxf7 Kxf7 Nxb3 cxb3 1 00:00 -0.16 Nxb3 cxb3 2 00:00 -0.16 Nxb3 cxb3 3 00:00 -0.26 Nxb3 Bg5 Nf5+ gxf5 4 00:00 -0.55 Nxb3 Bg5 Qc3+ Kxh6 Nd4 5 00:00 -0.65 Nxb3 Bg5 f4 Qb6+ Nd4 Bxh6 6 00:00 -0.73 Nxb3 Bg5 f4 Bxh6 Nd4 Qh4 6+ 00:00 -0.73 Ng4 6 00:00 -0.53 Ng4 Ba4 Nc6 Qc7 Nxe7 Qxe7 e5 6+ 00:00 -0.53 Nxf7 6 00:00 -0.21 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 7 00:00 -0.21 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 8 00:01 0.24 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rg8 Qxh7+ Kf6 Rec1 9 00:02 0.16 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rg8 Qxh7+ Kf6 Rec1 a5 10 00:08 0.68 Nxf7 Qb6 Ne6+ Kxf7 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Ng7 Kc7 Qf7 Kd7 Qe6+ Kd8 11 00:13 0.72 Nxf7 Qb6 Ne6+ Kxf7 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Ng7 Kc7 Qf7 Kd7 Ne6 12 00:28 0.80 Nxf7 Qb6 Ne6+ Kxf7 Qh6 Reb8 Qxh7+ Ke8 Qxg6+ Kd7 Ng7 Bc2 Qe6+ Kd8 Nf5 Qc7 Ng7 13 01:47 1.03 Nxf7 Qb6 Ne6+ Kxf7 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qg4 Ra7 Nc5+ Kd8 Nxb3 cxb3 Qg8+ Kd7 Qe6+ Kd8 Rf1 14 03:59 1.10 Nxf7 Qb6 Ne6+ Kxf7 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Ng7 Rab8 Qe6+ Kd8 Qf7 Kd7 Nf5 Re8 e5 dxe5 Rxe5 Aristarch 4.41 2+ 00:00 0.42 Nxb3 cxb3 Qf4 2 00:00 0.48 Nxb3 cxb3 Qf4 3 00:00 0.20 Nxb3 cxb3 Qf4 Bf6 4 00:00 -0.10 Nxb3 cxb3 Ng4 Kg8 Rac1 5 00:00 -0.35 Nxb3 cxb3 Ng4 h5 Qh6+ Kg8 Ne3 Qd7 6 00:00 -0.53 Nxb3 Bg5 Qc3+ Kxh6 Na5 Bf6 Qc2 6+ 00:00 -0.52 Ng4 Bg5 Qc3 Bf6 Nxf6 Qxf6 Nxb3 6 00:00 -0.35 Ng4 Bg5 Qc3 Bf6 Nxf6 Qxf6 Nxb3 7 00:00 -0.37 Ng4 Bg5 Qc3 Bf6 e5 dxe5 Nxb3 8 00:00 -0.37 Ng4 Bg5 Qc3 Bf6 e5 dxe5 Nxb3 cxb3 Qxb3 9 00:01 -0.36 Ng4 Bg5 Qc3 Bf6 Qd2 Bxd4 Qxd4+ f6 Rac1 a5 9+ 00:01 -0.35 Nxf7 Kxf7 Ne6 Qb6 Qh6 Bf8 Qxh7+ Kf6 9+ 00:01 -0.15 Nxf7 Kxf7 Ne6 Qb6 Qh6 Bf8 Qxh7+ Kf6 9 00:01 -0.21 Nxf7 Kxf7 Ne6 Qc8 Qh6 Rg8 Qxh7+ Kf6 Re3 Qd7 10 00:02 0.00 Nxf7 Kxf7 Ne6 Qc8 Qh6 Rg8 Qxh7+ Kf6 Qh6 Kf7 Qh7+ 11 00:03 0.41 Nxf7 Kxf7 Ne6 Qd7 Qh6 Rg8 Qxh7+ Kf6 Rxa6 12+ 00:08 0.83 Nxf7 Kxf7 Ne6 12 00:09 0.76 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qf5 a5 Nc5+ Ke8 Ne6 Kd7 13 00:15 1.00 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qf5 a5 Re3 a4 Rf1 c3 bxc3 14 00:30 1.31 Nxf7 Kxf7 Ne6 Qb6 Qf4+ Kg8 Rac1 Ruffian 1.0.5 1 00:00 -0.62 Nxb3 cxb3 2 00:00 -0.40 Nxb3 cxb3 Rec1 3 00:00 -0.54 Nxb3 cxb3 Qf4 Bf6 4 00:00 -0.52 Nxb3 cxb3 Ng4 Bf6 Qh6+ Kg8 Nxf6+ Qxf6 5 00:00 -0.72 Nxb3 Bg5 Qe2 Bxh6 Nd4 5 00:00 -0.51 Ng4 Kg8 Nxb3 cxb3 Nh6+ Kf8 6 00:00 -0.29 Ng4 Ba4 Nc6 Qc7 Qd4+ f6 Rec1 7 00:00 -0.40 Ng4 Ba4 Nc6 Qc7 Qd4+ f6 Nxe7 Qxe7 Rec1 8 00:00 -0.37 Ng4 Bg5 Qc3 Bf6 e5 dxe5 Nxb3 cxb3 Qxb3 9 00:01 -0.42 Ng4 Bg5 Qc3 Bf6 e5 dxe5 Nxb3 cxb3 Nxf6 Qxf6 Qxb3 10 00:02 -0.42 Ng4 Bg5 Qc3 Bf6 e5 dxe5 Nxb3 cxb3 Nxf6 Qxf6 Qxb3 11 00:05 -0.27 Ng4 Bg5 f4 h5 fxg5 hxg4 hxg4 Re5 Qc3 Qb6 Qe3 Rb8 11+ 00:08 -0.07 Nxf7 11 00:09 -0.06 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qf7 Qb7 Rec1 Rg8 12 00:13 0.02 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qf7 Ba4 Rec1 Rg8 Kh1 13 00:26 0.01 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qf7 Qa7 Rec1 a5 e5 Qb7 14+ 01:02 0.36 Nxf7 14 01:14 0.36 Nxf7 Kxf7 Ne6 Qb8 Qh6 Rc8 Qxh7+ Ke8 Qxg6+ Kd7 Qg4 Ke8 e5 dxe5 Qh5+ Kd7 Rxe5 c3 bxc3 Bxd5 Rxd5+ Kxe6 Crafty 19.10 6 00:00 -0.89 1. Ng4 h5 2. Qc3 Kh7 3. Nc6 Qc7 4. Nxe7 Qxe7 7 00:01 -0.85 1. Ng4 Bg5 2. Qc3 Bf6 3. e5 dxe5 4. Nxb3 cxb3 5. Qxb3 8 00:01 -0.85 1. Ng4 Bg5 2. Qc3 Bf6 3. e5 dxe5 4. Nxb3 cxb3 5. Qxb3 9 00:04 -0.96 1. Ng4 Bg5 2. Qc3 Bf6 3. e5 dxe5 4. Nxb3 cxb3 5. Rad1 Qd6 6. Nxf6 Kxf6 7. Qxb3 10 00:07 -0.81 1. Ng4 Bg5 2. Qc3 Bf6 3. Qe3 Bxd4 4. Qxd4+ f6 5. Re3 h5 6. Nh2 11 00:19 -0.60 1. Ng4 Bg5 2. f4 h5 3. fxg5 hxg4 4. h4 Qe7 5. Nc6 Qc7 6. Qf4 12 00:24 -0.41 1. Ng4 Bg5 2. f4 h5 3. fxg5 hxg4 4. hxg4 Rh8 5. Nxb3 cxb3 6. Qc3+ Kh7 7. Qh3+ Kg8 8. Qe3 12 00:53 -0.20 1. Nxf7!! 12 01:03 0.01 1. Nxf7 Kxf7 2. Ne6 Qc8 3. Qh6 Bf8 4. Qxh7+ Kf6 5. Qh8+ Ke7 6. Qh7+ Kf6 13 02:02 0.01 1. Nxf7 Kxf7 2. Ne6 Qc8 3. Qh6 Bf8 4. Qxh7+ Kf6 5. Qh8+ Ke7 6. Qh7+ Kf6 14 02:26 0.24 1. Nxf7 Kxf7 2. Ne6 Qc8 3. Qh6 Bf8 4. Qxh7+ Kf6 5. Re3 Rxe6 6. Rf3+ Ke5 7. Qh8+ Rf6 8. Qxf6+ Kxe4 9. Rc1 Ba4 10. Qf7 ELChinito_325 7 00:00 -0.62 Ng4 Bg5 Qb4 h5 Nh2 Ba4 Rxa4 bxa4 Qxc4 8 00:01 -0.46 Ng4 Bg5 Qc3 Bf6 Qe3 Ba4 Nc6 Bg5 9 00:02 -0.41 Ng4 Bg5 Qc3 Bf6 Qe3 Kg8 Nxb3 cxb3 Nxf6+ Qxf6 Qxb3 10 00:05 -0.30 Ng4 Bg5 Qc3 Kg8 h4 h5 Nc6 Qd7 Nf6+ Bxf6 Qxf6 Bc2 11 00:11 -0.30 Ng4 Bg5 Qc3 Bf6 Qe3 Bxd4 Qxd4+ f6 Qd2 Kh8 Qf4 Rf8 12 00:29 -0.27 Ng4 Bg5 Qc3 Bf6 Qe3 Bxd4 Qxd4+ f6 Qd2 Qe7 Ra3 f5 Qh6+ Kg8 12 01:13 0.00 Nxf7 Kxf7 Ne6 Qc8 Qh6 Bf8 Qxh7+ Kf6 Qh8+ Kf7 Qh7+ 13 01:26 0.40 Nxf7 14 02:53 0.54 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Rac1 Rh8 Qf7 Rae8 Re3 Rh4 Kh1 List512 5 00:00 -0.69 Nxb3 cxb3 Ng4 Bf6 Nxf6 Qxf6 Rac1 6 00:00 -0.91 Nxb3 Bg5 f4 Bxh6 Nd4 Qf6 6 00:00 -0.63 Ng4 Ba4 Nc6 Qd7 Nxe7 Qxe7 Qf4 7 00:00 -0.59 Ng4 Bg5 Qc3 Kg8 Nxb3 cxb3 Qxb3 Qe7 8 00:00 -0.51 Ng4 Bg5 Qc3 Bf6 e5 dxe5 Nxb3 cxb3 Qxb3 9 00:01 -0.71 Ng4 Bg5 f4 Bh4 Qc3 Kf8 Re3 Ba4 Nc6 10 00:02 -0.33 Ng4 Bg5 f4 h5 Nf2 Bh6 Nxb3 cxb3 Qc3+ Qf6 e5 dxe5 11 00:04 -0.38 Ng4 Bg5 f4 h5 Nf2 Bh6 Qc3 b4 Qxb4 Bxf4 Nxb3 12 00:08 -0.32 Ng4 Bg5 f4 h5 fxg5 hxg4 hxg4 Rh8 Nxb3 cxb3 Qd4+ Kh7 e5 a5 13 00:25 -0.12 Ng4 Bg5 f4 h5 fxg5 hxg4 hxg4 Rh8 Ra3 Qd7 Nxb3 cxb3 Qf4 Rh4 14 00:49 -0.20 Ng4 Bg5 f4 h5 fxg5 hxg4 hxg4 Kg8 Qf4 Re5 Rf1 Qe8 Nxb3 cxb3 Rfe1 14 01:15 0.15 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qf5 a5 Re3 b4 Nc5+ 15 01:40 0.15 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qf5 a5 Re3 a4 Ng7+ 16 02:48 0.15 Nxf7 Kxf7 Ne6 Qb6 Qh6 Rec8 Qxh7+ Ke8 Qxg6+ Kd7 Qf5 Ke8 e5 dxe5 Ng7+
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