Author: Bernhard Bauer
Date: 01:39:32 06/14/99
Go up one level in this thread
On June 13, 1999 at 15:13:38, Peter Kappler wrote:
>On June 13, 1999 at 13:49:41, James Robertson wrote:
>
>>I was testing a newer version of my program with WAC, and at position 146:
>>
>>8/8/2Kp4/3P1B2/2P2k2/5p2/8/8 w - - bm Bc8; id WAC146;
>>
>>where it usually chooses Bc8, it chose Bh3, with nearly the same score for both
>>moves. I was curious, so I tried Crafty 16.6 on the positions after Bc8 and Bh3,
>>respectively. Bc8 (the WAC move) generated a score of ~+9.77 (I think) and Bc8
>>generated a score of +9.75. Can anyone else comfirm that the moves are about
>>equal?
>>
>>Thanks,
>>James
>
>
>James,
>
>I think Bc8 is the correct move. Bh3 doesn't throw away the win, but it does
>appear to waste time. If you force Crafty to play 1. Bh3 and then analyze the
>position, I suspect you will see that the bishop ends up moving back to c8 soon.
>
>Essentially, white's plan in the position is to wait for Black to push f2, and
>*then* play Bh3, after which Black's king has a harder time chasing the bishop
>away...
>
>Hope this helps. My program needs 12 plies to like Bc8, but it sticks with it.
>
>--Peter
Hi,
if you use crafty without table bases you get Bc8
16-> 25.97 9.75 1. Bc8 Kg3 2. Ba6 f2 3. c5 dxc5 4.
Kxc5 Kg2 5. d6 f1=Q 6. Bxf1+ Kxf1 7.
d7 Ke2 8. d8=Q Kf3 9. Qh4 Ke2 10. Kd4
Kd2
however, if you use tablebases you get Bd3.
15-> 2:35 22.03 1. Bd3 Ke5 2. c5 Kd4 3. cxd6 Kc3 4.
d7 Kb2 5. d8=Q Kc3 6. Qf6+ Kd2 7. Qd4
f2 8. d6 f1=Q 9. Bxf1+ Kc2 10. Bc4
16 3:07 ++ 1. Bd3!!
note that the score is much higher, so Bd3 may be a cook too.
Anyway, the use of WAC is limited.
Kind regards
Bernhard
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.