Author: Robert Hyatt
Date: 17:17:00 10/20/98
Go up one level in this thread
On October 20, 1998 at 11:33:57, blass uri wrote:
>r7/7p/5kp1/8/1p6/4P2P/PR2K1P1/8 black to move
>
>My opponent in a correspondence game played Ra3
>I think that it is the best move but no program that I know can produce this
>move.
>
>I get moves like h5, Ra4 or Ke5.
>
>The programs do not understand that a passed pawn is more dangerous than e
>passed pawn.
>
>Uri
I thought I would give this a whirl, since I have been making minor endgame
scoring changes anyway, and was surprised to find this running Crafty 15.21
on my 4 processor machine:
10 10.70 -1.17 1. ... Ke5 2. Rxb4 Rxa2+ 3. Kf3 Ra5
4. g4 Rc5 5. Re4+ Kd5 6. Rd4+ Ke5 7.
g5 Rc1
10-> 17.04 -1.17 1. ... Ke5 2. Rxb4 Rxa2+ 3. Kf3 Ra5
4. g4 Rc5 5. Re4+ Kd5 6. Rd4+ Ke5 7.
g5 Rc1
11 28.40 -1.30 1. ... Ke5 2. Kd3 Kd5 3. e4+ Ke5 4.
Kc4 h6 5. Kxb4 Kxe4 6. a4 Rb8+ 7. Kc3
Rd8
11 1:01 -1.26 1. ... Ra3 2. Rxb4 Rxa2+ 3. Kf3 Rc2
4. g3 Rc6 5. Ke4 Ke6 6. h4 h6 7. g4
11-> 1:23 -1.26 1. ... Ra3 2. Rxb4 Rxa2+ 3. Kf3 Rc2
4. g3 Rc6 5. Ke4 Ke6 6. h4 h6 7. g4
12 1:36 -1.32 1. ... Ra3 2. Rxb4 Rxa2+ 3. Kf3 Ra6
4. g4 h6 5. h4 Rd6 6. Rd4 Rc6 7. Ke4
Ke6
12-> 2:19 -1.32 1. ... Ra3 2. Rxb4 Rxa2+ 3. Kf3 Ra6
4. g4 h6 5. h4 Rd6 6. Rd4 Rc6 7. Ke4
Ke6
I stopped it at that point. It is obvious that Ra3 and Ke5 are pretty close
although Ra3 won out for at least the last two iterations...
Bob
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