Author: Robert Hyatt
Date: 19:35:55 10/14/99
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. :)
>
>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
Here is what I see:
27 seconds to play the move in a game.
9 4.23 ++ 1. Qd4+!!
(2) 9 6.73 0.93 1. Qd4+ Kb8 2. Nd2 Rf2 3. Qd8+ Ka7
4. Rc8 Qxc8 5. Qxc8 Rxd2 6. Qd7 Kb6
7. Qxg7
(2) 9-> 9.67 0.93 1. Qd4+ Kb8 2. Nd2 Rf2 3. Qd8+ Ka7
4. Rc8 Qxc8 5. Qxc8 Rxd2 6. Qd7 Kb6
7. Qxg7
10 16.89 1.22 1. Qd4+ Kb8 2. Nd2 Qd6 3. Qxd6+ Rxd6
4. Nxe4 Re6 5. Rc3 Rxe4 6. Rxd3 Kc7
7. Kf2
10 26.80 ++ 1. a5!!
10 1:45 3.29 1. a5 Rf5 2. Nb6 Rxa5 3. Nc8+ Ka8 4.
Qd4 Nc5 5. Rxc5 Rxc5 6. Qxc5 Kb8 7.
Qd6+ Qxd6 8. Nxd6
10-> 1:45 3.29 1. a5 Rf5 2. Nb6 Rxa5 3. Nc8+ Ka8 4.
Qd4 Nc5 5. Rxc5 Rxc5 6. Qxc5 Kb8 7.
Qd6+ Qxd6 8. Nxd6
11 1:49 3.47 1. a5 Rf5 2. Nb6 Rxa5 3. Nc8+ Ka8 4.
Qd4 Ra1+ 5. Qxa1 Qxb3 6. Rc7 Nb4 7.
Nb6+ Ka7 8. Qd4
(3) 11-> 1:58 3.47 1. a5 Rf5 2. Nb6 Rxa5 3. Nc8+ Ka8 4.
Qd4 Ra1+ 5. Qxa1 Qxb3 6. Rc7 Nb4 7.
Nb6+ Ka7 8. Qd4
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