Author: Uri Blass
Date: 23:17:07 04/24/04
Go up one level in this thread
On April 25, 2004 at 01:26:25, Robert Hyatt wrote: >On April 25, 2004 at 01:11:22, Drexel,Michael wrote: > >>On April 24, 2004 at 21:42:21, Robert Hyatt wrote: >> >>>On April 24, 2004 at 18:46:45, Vincent Diepeveen wrote: >>> >>>>On April 24, 2004 at 17:42:30, Uri Blass wrote: >>>> >>>>when in analysis mode, crafty is not using a-symmetric king safety. >>>>In game mode it does. >>>> >>>>So please use a-symmetric king safety instead of analysis mode to see whether it >>>>finds it. As it uses that game mode when playing a game which is what counts. >>> >>>It finds it quickly in "game mode": >>> >>> 10 10.11 0.23 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+ >>> 4. Rxf2 exf5 5. gxf5 cxd4 6. fxg6+ >>> Kxg6 7. Qe6+ Kg5 8. Qf5+ Kh6 9. Nxd5 >>> 10-> 11.06 0.23 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+ >>> 4. Rxf2 exf5 5. gxf5 cxd4 6. fxg6+ >>> Kxg6 7. Qe6+ Kg5 8. Qf5+ Kh6 9. Nxd5 >>> (s=2) >>> 11 13.23 0.53 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+ >>> 4. Rxf2 exf5 5. gxf5 cxd4 6. fxg6+ >>> Kg7 7. Rf7+ Kxg6 8. Qf5+ Kh6 9. Qe6+ >>> Kg5 10. Qf5+ Kh6 11. Nxd5 >>> 11-> 16.94 0.53 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+ >>> 4. Rxf2 exf5 5. gxf5 cxd4 6. fxg6+ >>> Kg7 7. Rf7+ Kxg6 8. Qf5+ Kh6 9. Qe6+ >>> Kg5 10. Qf5+ Kh6 11. Nxd5 (s=2) >>> 12 33.40 0.55 1. Nxf7 Kxf7 2. f5 cxd4 3. Bxd4 Nf8 >>> 4. O-O-O Kg8 5. f6 Bc5 6. Bxc5 bxc5 >>> 7. Kb1 hxg4 >>> 12-> 42.39 0.55 1. Nxf7 Kxf7 2. f5 cxd4 3. Bxd4 Nf8 >>> 4. O-O-O Kg8 5. f6 Bc5 6. Bxc5 bxc5 >>> 7. Kb1 hxg4 >>> 13 1:01 0.43 1. Nxf7 Kxf7 2. f5 cxd4 3. Bxd4 Bh4+ >>> 4. Kd1 hxg4 5. fxe6+ Kg8 6. Qxg4 Nf8 >>> 7. Rf7 Be7 8. h3 Rh5 >>> 13-> 1:54 0.43 1. Nxf7 Kxf7 2. f5 cxd4 3. Bxd4 Bh4+ >>> 4. Kd1 hxg4 5. fxe6+ Kg8 6. Qxg4 Nf8 >>> 7. Rf7 Be7 8. h3 Rh5 (s=2) >>> >> >>Sorry, but this is not convincing. >>The point of the sacrifice is 3.fxg6+ Kg7 4.gxh5 Bh4+ 5.Ke2. >> >>3.Bxd4 Bh4+ 4.Kd1 Kg8 is worse. > >That's not the way computers always work. They first have to play the correct >move. Then they have to play the correct follow-up. Then they have to play the >correct follow-up to that. Etc. > >This is not so much tactics as it is evaluation in this particular position... >Different evaluation terms will change the PV. But perhaps not any of the moves >in the actual game. > >I tested here and, at least to Crafty, Bxd4 and fxg6 end up with an almost >identical score, although in a real game, crafty actually plays fxg6 after the >first two moves are played OTB. > > 11 12.07 0.05 3. Bxd4 Bh4+ 4. Kd1 Nf8 5. fxe6+ Kg8 > 6. Qf3 Rh7 7. gxh5 Nxe6 8. Bxb6 Qxb6 > 9. hxg6 Qxb2 10. gxh7+ Kxh7 > 11 31.02 0.14 3. fxe6+ Kg7 4. Bxd4 Nf8 5. O-O-O Nxe6 > 6. gxh5 Nxd4 7. Rxd4 Rxh5 8. Qg3 Rg5 > 9. Rxd5 Rxg3 10. Rxd8 I see based on the analysis that you post 3.fxe6 and not 3.fxg6 Uri
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