Author: William Bryant
Date: 20:36:28 10/16/99
Go up one level in this thread
On October 14, 1999 at 21:27:35, James Robertson wrote:
>Today in a 5 2 blitz game on FICS, my program reached this position and played
>a5!, which wins. I guess this shows the advantages of a permanent brain, as it
>couldn't find the same move in over one and a half minutes after the game.
>
>3Q4/kp4pp/p3qr2/8/P1N1p3/1P1nP2P/2R3P1/6K1 w - - bm a5;
>
>How long does it take your program to see a5 as substantially better than Qd4?
>If you program gives a5 a score of about 1 to 1.5 pawns for white, it isn't
>seeing everything. :)
The latest Debug version (developmental version) of Screamer
gets this in 8 seconds, with a marked increase in the score by
22 seconds
Welcome to Screamer (Beta) 1.00 Build 39
Current Hash Table Size: 8192 K bytes
Debug Control On
PVS Search
NULL move Search
New Board Position
3Q4/kp4pp/p3qr2/8/P1N1p3/1P1nP2P/2R3P1/6K1 w - - bm a5;
Move 1 W>>
PLY NODES TIME SCORE PV
____________________________________________
5 16576 0:00 +0.95 Qh8 Qf5 Qxg7 Qf1+ Kh2 h5
6 111084 0:02 +0.44 Qh8 Rg6 Qxh7 Ne1 Rf2 Nxg2
7 247748 0:05 +0.91 Qh8 Qf5 Qxg7 Nc5 g4 Qf1+ Kh2 h6
7 444067 0:08 +1.14 a5 Qf5 Qd4+ Kb8 Nd6 Qf1+ Kh2 Rf8 Nxe4
7 501273 0:10 +1.14 a5 Qf5
8 1129450 0:22 +1.71 a5 Qf5 Qd4+ Qc5 Qxe4 Qf5 Qd4+ Nc5 e4 Qf1+ Kh2
----- Search Stopped -----
Total Search Time: 0:26
Move: a5
>
>CM5500: 6 seconds!
>Crafty 16.18: 55 seconds
>Insomniac 0.54: 1 min, 43 seconds
>Crafty 16.16: 1 min, 59 seconds
>
>Insomniac's results on a P233, 4MB hash (it had a 4MB hash in the game too).
>
> 1 23 0 47 Qc7
> 2 19 60 298 Qc7 Qf7
> 3 17 60 2131 Qd4+ Kb8 Qd8+ Qc8 Qd4
> 4 122 280 8323 Qh8 Qf7 Qxh7 Rf1+ Kh2
> 5> 122 330 18382 Qd4+ Kb8 Qd8+ Ka7
> 5 122 330 19133 Qd4+ Kb8 Qd8+ Ka7
> 6 103 500 43431 Qd4+ Kb8 Qd8+ Ka7 Qh8
> 7 103 1100 125435 Qd4+ Kb8 Qd8+ Ka7 Qh8 Qf7 Qxh7 Rf1+ Kh2 Qc7+ g3
> 8 103 4290 582670 Qd4+ Kb8 Nd2 Nf2 Qd8+ Ka7 Nc4 Nd3
> 9 103 13350 1871680 Qd4+ Kb8 Qd8+ Ka7
>10 113 33120 4722362 Qd4+ Kb8 Nd2 Nf2 Rc4 Rf7 Nxe4 Rd7 Nc5 Rxd4 Nxe6
> Rxc4 bxc4
>11> 385 103760 14085444 a5 Qf5 Nb6 Qf1+ Kh2 Rf8 Qd4 Kb8 Nd7+ Ka8 Nxf8 Q
>xf8 Qxe4
>11 385 103870 14101461 a5 Qf5 Nb6 Qf1+ Kh2 Rf8 Qd4 Kb8 Nd7+ Ka8 Nxf8 Q
>xf8 Qxe4
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.