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Subject: Re: nice position

Author: Anthony Cozzie

Date: 14:28:33 05/20/04

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On May 20, 2004 at 10:06:36, Will Singleton wrote:

>Sometimes Crafty gives me a headache.  I was sitting there, minding my own
>business, when all of a sudden pow!  and Crafty wins another one.  Must be
>something to this smp business.
>
>Anyway, on ICC Crafty runs on a 2x 2.8ghz xeon.  It found Rxg6 in about a
>minute, if you count my thinking time plus its thinking time (assuming it
>pondered correctly, which it probably did).  If I run the same position on my p4
>2.8ghz, it takes Crafty 4:44 to find the move.  I suppose the hash could affect
>things, but that's still quite a speedup.
>
>Here's the position.  Finding Rxg6 probably depends in large part on
>king-safety, since Amateur likes it fairly quickly (p4 2.8ghz):
>
>[d]2rq1r1k/1pp1bp2/p5pp/1n1Pp3/2B1N3/4PP2/PPQ2PRP/6RK w - -
>
>10 -28 283 1103649 Qb3 Nd6 Bd3 Nxe4
>11 -23 452 1839082 Qb3 Nd6 Bd3 Nxe4 fxe4 Rb8 f4 Bc5 Bc2 Qd6 f5 Rg8 fxg6 fxg6
>12 -14 889 3652804 Qb3 Nd6 Bd3 Bh4
>13 -9 1572 6584263 Qb3 Nd6 Bd3 Nxe4 fxe4 Rb8 Qc3 Qd6 Rc1 Rc8 f4 Bf6 Qc5 Qd7
>14 -5 4219 17715012 Qb3 Nd6 Bd3 Ra8 Nxd6 Qxd6 Qc3 Rd8 e4
>14 6 6427 26545535 Rxg6 fxg6 Rxg6 Rf5


Zappa gets it in 17 seconds, good score in 30 seconds.  This is probably a
little easier for Zappa since it tends to overvalue the queen.

1. Rg2xg6 f7xg6 2. Rg1xg6 Rf8-f5 3. Rg6xh6 Kh8-g7 4. Ne4-g3 Kg7xh6 5. Ng3xf5
Kh6-g5 6. Nf5-g3 Nb5-d6 7. Qc2-h7
 = (0.54)	Depth: 10/32	00:00:20.62	13383kN
1. Rg2xg6 f7xg6 2. Rg1xg6 Rf8-f5 3. Rg6xh6 Kh8-g7 4. Ne4-g3 Nb5-d6 5. Ng3xf5
Nd6xf5 6. Rh6-h5 Nf5-h6 7. Qc2-e4 Nh6-f7
 = (1.65)	Depth: 11/33	00:00:28.81	18995kN
1. Rg2xg6 f7xg6 2. Rg1xg6 Nb5-d6 3. Ne4xd6 Qd8xd6 4. Rg6xd6 c7xd6 5. Qc2-e4
Rf8-g8 6. h2-h4 Rg8-g7 7. Bc4-d3 Rc8-c1 8. Kh1-h2 Kh8-g8
 = (1.70)	Depth: 14/36	00:01:52.85	80344kN

anthony



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