Author: Robert Hyatt
Date: 10:41:52 04/25/04
Go up one level in this thread
On April 25, 2004 at 02:17:07, Uri Blass wrote:
>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
Correct. cut/paste error. I made it search each move and then cut the
analysis. Apparently I cut the wrong one...
Here is the score after white plays fxg6:
11-> 11.48 -0.01 3. ... Kg7 4. Bxd4 Bh4+ 5. Kd1 hxg4
6. Qxg4 Rf8 7. Rf7+ Rxf7 8. gxf7+ Kxf7
9. Qh5+ Kg7 10. Qg4+ Kf7
About the same...
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