Author: Robert Hyatt
Date: 18:42:21 04/24/04
Go up one level in this thread
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)
>
>>On April 24, 2004 at 17:06:29, Mike Byrne wrote:
>>
>>>On April 24, 2004 at 12:51:02, Will Singleton wrote:
>>>
>>>>[D]rn1qk2r/p2nbp2/1p2p1p1/2ppP1Np/3P1PP1/P1N1B2Q/1PP4P/R3KR2 w Qkq - 0 16
>>>>
>>>>Nxf7 is a pretty speculative move, I don't think any other chess program would
>>>>play this. Turns out to be crushing, though. Would be amazing if Hydra saw
>>>>this tactically.
>>>
>>>White(1): rn1qk2r/p2nbp2/1p2p1p1/2ppP1Np/3P1PP1/P1N1B2Q/1PP4P/R3KR2 w Qkq - 0 1
>>>
>>>White(1): go
>>> time surplus 0.00 time limit 166:39 (166:39)/(30)
>>> time surplus 0.00 time limit 166:39 (166:39)/(30)
>>> depth time score variation (1)
>>> 1 0.00 -2.96 1. f5 Bxg5 2. Bxg5 Qxg5 3. fxe6 fxe6
>>> 4. gxh5
>>> 1 0.00 0.33 1. O-O-O
>>> 1-> 0.00 0.33 1. O-O-O
>>> 2 0.00 0.24 1. O-O-O c4
>>> 2-> 0.02 0.24 1. O-O-O c4
>>> 3 0.02 0.26 1. O-O-O Nc6 2. dxc5 Nxc5
>>> 3-> 0.03 0.26 1. O-O-O Nc6 2. dxc5 Nxc5 (s=2)
>>> 4 0.05 0.18 1. O-O-O cxd4 2. Bxd4 Nc6 3. gxh5 Nxd4
>>> 4. Rxd4 gxh5
>>> 4-> 0.06 0.18 1. O-O-O cxd4 2. Bxd4 Nc6 3. gxh5 Nxd4
>>> 4. Rxd4 gxh5 (s=2)
>>> 5 0.08 -1 1. O-O-O
>>> 5 0.08 -0.50 1. O-O-O cxd4 2. Rxd4 Nc6 3. Rdd1 Bxg5
>>> 4. fxg5 Ndxe5 5. gxh5 gxh5
>>> 5 0.13 -0.03 1. dxc5 bxc5 2. gxh5 Rxh5 3. Qg3 Nc6
>>> 5-> 0.17 -0.03 1. dxc5 bxc5 2. gxh5 Rxh5 3. Qg3 Nc6
>>> 6 0.22 -0.09 1. dxc5 bxc5 2. gxh5 Rxh5 3. Qg2 Bxg5
>>> 4. fxg5 Nxe5 5. Bxc5 Rxg5
>>> 6 0.42 0.12 1. Nb5 Nc6 2. dxc5 Nxc5 3. O-O-O a6
>>> 4. Bxc5 axb5 5. Bxe7 Nxe7 6. gxh5 gxh5
>>> 6-> 0.53 0.12 1. Nb5 Nc6 2. dxc5 Nxc5 3. O-O-O a6
>>> 4. Bxc5 axb5 5. Bxe7 Nxe7 6. gxh5 gxh5
>>> (s=3)
>>> 7 0.88 0.06 1. Nb5 Nc6 2. O-O-O cxd4 3. Nxd4 Nxd4
>>> 4. Bxd4 Bxg5 5. fxg5 Qxg5+ (s=2)
>>> 7 1.14 +1 1. Nxf7!!
>>> 7 1.19 0.62 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd2 exf5
>>> 4. gxf5 cxd4 5. fxg6+ Kxg6 <HT>
>>> 7-> 1.19 0.62 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd2 exf5
>>> 4. gxf5 cxd4 5. fxg6+ Kxg6 <HT> (s=4)
>>> 8 1.30 +1 1. Nxf7!!
>>> 8 1.45 1.18 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd2 Ke8
>>> 4. fxe6 Nf8 5. gxh5 cxd4 (s=3)
>>> 8-> 1.61 1.18 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd2 Ke8
>>> 4. fxe6 Nf8 5. gxh5 cxd4
>>> 9 2.11 1.09 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd1 Ke8
>>> 4. fxe6 Nf8 5. gxh5 cxd4
>>> 9-> 2.28 1.09 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Kd1 Ke8
>>> 4. fxe6 Nf8 5. gxh5 cxd4
>>> 10 4.22 1.25 1. Nxf7 Kxf7 2. f5 cxd4 3. fxe6+ Kg8
>>> 4. Bxd4 Nf8 5. O-O-O Nxe6 6. Kb1
>>> 10-> 4.80 1.25 1. Nxf7 Kxf7 2. f5 cxd4 3. fxe6+ Kg8
>>> 4. Bxd4 Nf8 5. O-O-O Nxe6 6. Kb1
>>> 11 10.55 0.97 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+
>>> 4. Rxf2 cxd4 5. fxe6+ Ke7 6. Nxd5+
>>> Kxe6 7. Nf4+ Kxe5 8. Nxg6+ Kd6 9. Nxh8
>>> Qxh8 10. gxh5
>>> 11-> 15.31 0.97 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+
>>> 4. Rxf2 cxd4 5. fxe6+ Ke7 6. Nxd5+
>>> Kxe6 7. Nf4+ Kxe5 8. Nxg6+ Kd6 9. Nxh8
>>> Qxh8 10. gxh5
>>> 12 22.22 +1 1. Nxf7!!
>>> 12 25.53 1.37 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+
>>> 4. Rxf2 exf5 5. gxf5 cxd4 6. fxg6+
>>> Kg7 7. Qe6 dxc3 8. Rf7+ Kh6 9. g7+
>>> Kg5 10. gxh8=Q Qxh8
>>> 12-> 27.95 1.37 1. Nxf7 Kxf7 2. f5 Bh4+ 3. Bf2 Bxf2+
>>> 4. Rxf2 exf5 5. gxf5 cxd4 6. fxg6+
>>> Kg7 7. Qe6 dxc3 8. Rf7+ Kh6 9. g7+
>>> Kg5 10. gxh8=Q Qxh8
>>>? 13 45.02 1/41* 1. Nxf7
>>>White(1): ?
>>> time=53.20 cpu=185% mat=0 n=45328093 fh=90% nps=852K
>>> ext-> chk=1736709 cap=179025 pp=128620 1rep=124260 mate=2772
>>> predicted=0 nodes=45328093 evals=17756672 50move=0
>>> endgame tablebase-> probes=0 hits=0
>>> SMP-> split=598 stop=84 data=5/128 cpu=1:38 elap=53.20
>>>
>>>
>>>
>>>White(1): Nxf7
>>> time used: 53.20
>>>
>>>looks pretty sound to me ...
>>
>>Which program did you use
>>
>>Crafty19.12(1 cpu) can find it but it is not so speculative like the program
>>that you used and does not see a score of more than +1 for white.
>>
>>older crafty(19.01) needs more time and finds it only with a negative score at
>>depth 11 and 0.01 score at depth 12 and it may be interesting to know what
>>changes did Bob to teach Crafty to solve it(I guess that the difference is
>>result of evaluation changes and not search changes).
>>
>>
>>Analysis under chessbase
>>
>>Hydra - Diep
>>rn1qk2r/p2nbp2/1p2p1p1/2ppP1Np/3P1PP1/P1N1B2Q/1PP4P/R3KR2 w Qkq - 0 1
>>
>>Analysis by Crafty 19.12:
>>
>>16.0-0-0 Bxg5 17.fxg5 cxd4 18.Bxd4 Qxg5+
>> = (0.18) Depth: 1/16 00:00:00
>>16.0-0-0 Bxg5 17.fxg5 cxd4 18.Bxd4 Qxg5+
>> = (0.18) Depth: 2/16 00:00:00
>>16.0-0-0 Bxg5 17.fxg5 cxd4 18.Bxd4 Qxg5+
>> = (0.18) Depth: 3/16 00:00:00
>>16.0-0-0 cxd4 17.Rxd4 Nc6 18.Rdd1 Bxg5 19.fxg5 Ndxe5 20.gxh5 Rxh5
>> ³ (-0.60) Depth: 4/16 00:00:00
>>16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg3 Nc6
>> = (-0.25) Depth: 4/16 00:00:00
>>16.Nf3 Nc6 17.0-0-0 c4
>> = (-0.19) Depth: 4/16 00:00:00
>>16.Nf3 cxd4 17.Bxd4 Nc6 18.0-0-0 Qc7
>> = (-0.14) Depth: 5/20 00:00:00
>>16.Nf3 cxd4 17.Nxd4 Bh4+ 18.Bf2 hxg4 19.Qxg4 Bxf2+ 20.Rxf2 Na6
>> = (-0.14) Depth: 6/20 00:00:00 120kN
>>16.Nb5 Nc6 17.0-0-0 cxd4 18.Nxd4 Nxd4 19.Bxd4 Bxg5 20.fxg5 Qxg5+
>> = (-0.09) Depth: 6/20 00:00:01 250kN
>>16.Nb5 a6 17.Nd6+ Bxd6 18.exd6 c4 19.0-0-0 Nf8 20.f5 Qxd6 21.fxe6 fxe6
>> = (0.09) Depth: 7/23 00:00:02 507kN
>>16.Nb5 Nf8 17.dxc5 bxc5 18.0-0-0 a6 19.Nc3 Nbd7 20.Nf3
>> = (0.10) Depth: 8/26 00:00:07 1884kN
>>16.Nxf7 Kxf7 17.f5 Bh4+ 18.Kd2 Nf8 19.fxe6+ Ke8 20.gxh5 cxd4
>> ² (0.32) Depth: 8/26 00:00:09 2447kN
>>16.Nxf7 Kxf7 17.f5 Bh4+ 18.Kd1 cxd4 19.fxe6+ Kg8 20.Bxd4 Nf8 21.gxh5 Rxh5
>> ² (0.46) Depth: 9/26 00:00:11 3143kN
>>16.Nxf7 Kxf7 17.f5 Bh4+ 18.Bf2 Bxf2+ 19.Rxf2 exf5 20.gxf5 cxd4 21.fxg6+ Kxg6
>>22.Qe6+ Kg5 23.Rf5+ Kh4 24.Rf4+ Kg5 25.Qf5+ Kh6 26.Nxd5
>> = (0.23) Depth: 10/30 00:00:22 6492kN
>>16.Nxf7 Kxf7 17.f5 Bh4+ 18.Bf2 Bxf2+ 19.Rxf2 exf5 20.gxf5 cxd4 21.fxg6+ Kg7
>>22.Rf7+ Kxg6 23.Qe6+ Kg5 24.Qf5+ Kh6 25.Nxd5
>> ² (0.53) Depth: 11/33 00:00:50 14761kN
>>16.Nxf7 Kxf7 17.f5 cxd4 18.Bxd4 Nf8 19.0-0-0 Ke8 20.f6 Bc5 21.Bxc5 bxc5 22.gxh5
>>Rxh5
>> ² (0.59) Depth: 12/36 00:03:01 58302kN
>>
>>
>>
>>Hydra - Diep
>>rn1qk2r/p2nbp2/1p2p1p1/2ppP1Np/3P1PP1/P1N1B2Q/1PP4P/R3KR2 w Qkq - 0 1
>>
>>Analysis by Crafty 19.01:
>>
>>16.dxc5 Nxc5
>> = (-0.07) Depth: 1/21 00:00:00
>>16.dxc5 Nxc5
>> = (-0.07) Depth: 2/21 00:00:00
>>16.dxc5 bxc5 17.Nf3
>> = (-0.07) Depth: 3/21 00:00:00
>>16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg3
>> = (-0.03) Depth: 4/21 00:00:00
>>16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg3 Nc6
>> ³ (-0.33) Depth: 5/21 00:00:00
>>16.Nb5 cxd4 17.Bxd4 Nc6 18.Nf3 Nxd4 19.Nfxd4
>> ³ (-0.32) Depth: 5/21 00:00:00
>>16.Nb5 cxd4 17.Bxd4 Nc6 18.Nf3 a6
>> ³ (-0.39) Depth: 6/22 00:00:00 64kN
>>16.Nf3 Nc6 17.dxc5 Nxc5 18.f5 exf5 19.gxf5
>> ³ (-0.36) Depth: 6/22 00:00:00 114kN
>>16.Nf3 Nc6 17.Nb5 cxd4 18.Nfxd4 Bh4+ 19.Bf2 Nxd4 20.Nxd4 hxg4 21.Qxg4
>> ³ (-0.42) Depth: 7/25 00:00:01 236kN
>>16.Nf3 Nc6 17.Nb5 cxd4 18.Nfxd4 Nxd4 19.Bxd4 Bh4+ 20.Bf2 Be7
>> ³ (-0.39) Depth: 8/25 00:00:03 628kN
>>16.Nf3 Nc6 17.Ne2 cxd4 18.Bxd4 a6 19.Ng3 Nxd4 20.Nxd4 Bc5
>> ³ (-0.53) Depth: 9/29 00:00:07 1685kN
>>16.Nb5 Nc6 17.f5 exf5 18.gxf5 Nxd4 19.Bxd4 cxd4 20.fxg6 fxg6
>> ³ (-0.52) Depth: 9/29 00:00:10 2665kN
>>16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg2 Bxg5 19.fxg5 Nc6 20.Qf2 Ndxe5 21.0-0-0
>> ³ (-0.42) Depth: 9/29 00:00:14 4043kN
>>16.dxc5 bxc5 17.gxh5 Rxh5 18.Qg2 Bxg5 19.fxg5 Nc6 20.0-0-0 Ndxe5 21.Qe2 Nc4
>> ³ (-0.52) Depth: 10/29 00:00:20 5930kN
>>16.Nb5 Nc6 17.f5 Nxd4 18.fxe6 fxe6 19.Nxd4 Bxg5 20.Nxe6 Bh4+ 21.Bf2 hxg4 22.Bxh4
>>Rxh4
>> = (-0.10) Depth: 10/29 00:00:34 10040kN
>>16.Nb5 cxd4 17.Bxd4 Nc6 18.Qc3 Rc8 19.gxh5 Nb4 20.Nxf7 Kxf7 21.hxg6+ Kxg6
>>22.Rg1+
>> µ (-0.73) Depth: 11/31 00:00:53 16689kN
>>16.dxc5 bxc5 17.Qg2 Bxg5 18.fxg5 Nxe5 19.gxh5 Rxh5 20.Bxc5 Rxg5 21.Qe2 Nbd7
>>22.h4
>> ³ (-0.44) Depth: 11/31 00:01:34 30063kN
>>16.Nf3 Nc6 17.0-0-0 Qc8 18.gxh5 Rxh5 19.Qg2 c4 20.Kb1 Qa6 21.Ng5
>> ³ (-0.34) Depth: 11/31 00:02:17 43097kN
>>16.Nxf7 Kxf7 17.f5 Bh4+ 18.Bf2 Bxf2+ 19.Rxf2 exf5 20.gxf5 cxd4 21.fxg6+ Kxg6
>>22.Qe6+ Kg5 23.Qf5+ Kh6 24.Nxd5
>> = (-0.07) Depth: 11/31 00:02:42 51734kN
>>16.Nxf7 Kxf7 17.f5 cxd4 18.fxe6+ Kg8 19.Bxd4 Bh4+ 20.Bf2 Bxf2+ 21.Rxf2 Nxe5
>>22.g5 Ng4 23.Rd2
>> = (0.01) Depth: 12/33 00:03:09 60898kN
>>
>>Uri
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