Author: Robert Hyatt
Date: 21:06:21 08/21/04
Go up one level in this thread
On August 21, 2004 at 23:56:48, Stuart Cracraft wrote:
>On August 21, 2004 at 23:39:17, Stuart Cracraft wrote:
>
>>There was an error. The right position is:
>>
>>[D]5r1k/6p1/1n2Q2p/4p3/8/7P/PP4PK/R1B1q3 w
>>
>
>It takes my program 142M nodes to get the right move for the
>right reason in 10 minutes. This would be about 1.5 minutes
>on a more modern PC.
>
>I am wondering, specifically, what tricks there are to get it
>solved faster than this on non-parallel.
>
>Stuart
That is from my old program. Game was Cray Blitz vs Belle, ACM event in 1981.
Qxb6 loses. Bxh6 is an easy draw. Crafty has no problem whatsoever with this,
never has... Cray Blitz blew it back then running in an odd mode (batch) with
an "easy move" bug...
7-> 0.30 0.16 1. Qxb6 Rf1 2. Qd8+ Kh7 3. Qd3+ e4
4. Qxf1 Qxf1 5. b4
8 0.32 -1 1. Qxb6
8 0.34 -0.29 1. Qxb6 Rf1 2. Qd8+ Kh7 3. Qd3+ e4
4. Qxf1 Qxf1 5. b4 e3
8-> 0.82 -0.29 1. Qxb6 Rf1 2. Qd8+ Kh7 3. Qd3+ e4
4. Qxf1 Qxf1 5. b4 e3
9 0.88 -0.01 1. Qxb6 Rf1 2. Qd8+ Kh7 3. Qd3+ e4
4. Qxf1 Qxf1 5. b4 e3 6. a4
9-> 1.30 -0.01 1. Qxb6 Rf1 2. Qd8+ Kh7 3. Qd3+ e4
4. Qxf1 Qxf1 5. b4 e3 6. a4
10 1.41 -1 1. Qxb6
10 1.50 -0.45 1. Qxb6 Rf1 2. Qd8+ Kh7 3. Qd3+ e4
4. Qxf1 Qxf1 5. b3 e3 6. Bb2 e2 7.
Bc3
10 2.12 0.01 1. Bxh6 Qxa1 2. Qg6 Rg8 3. Bf4 Rb8
4. Bxe5 Rb7 5. Qh5+ Kg8 6. Qe8+ Kh7
7. Qh5+ Kg8
10-> 2.57 0.01 1. Bxh6 Qxa1 2. Qg6 Rg8 3. Bf4 Rb8
4. Bxe5 Rb7 5. Qh5+ Kg8 6. Qe8+ Kh7
7. Qh5+ Kg8
11 3.07 0.01 1. Bxh6 Qxa1 2. Qg6 Rg8 3. Bf4 Rb8
4. Bxe5 Rb7 5. Qh5+ Kg8 6. Qe8+ Kh7
7. Qh5+ Kg8
11-> 4.68 0.01 1. Bxh6 Qxa1 2. Qg6 Rg8 3. Bf4 Rb8
4. Bxe5 Rb7 5. Qh5+ Kg8 6. Qe8+ Kh7
7. Qh5+ Kg8
12 5.82 0.01 1. Bxh6 Qxa1 2. Qg6 gxh6 3. Qxh6+ Kg8
4. Qg6+ Kh8 5. Qh6+
12-> 8.95 0.01 1. Bxh6 Qxa1 2. Qg6 gxh6 3. Qxh6+ Kg8
4. Qg6+ Kh8 5. Qh6+
13 11.08 0.01 1. Bxh6 Qxa1 2. Qg6 gxh6 3. Qxh6+ Kg8
4. Qg6+ Kh8 5. Qh6+
That is one cpu on a xeon 2.8ghz box. Takes 2 secs, about 2M nodes, to find
Bxh6 with a draw score...
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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