Author: Robert Hyatt
Date: 06:56:02 03/02/00
Go up one level in this thread
On March 01, 2000 at 22:47:18, Howard Exner wrote:
>On March 01, 2000 at 22:33:16, Robert Hyatt wrote:
>
>>On March 01, 2000 at 02:58:49, Dann Corbit wrote:
>>
>>>On March 01, 2000 at 01:37:17, Janos Keinrath wrote:
>>>
>>>>Hi!
>>>>
>>>>Yesterday I saw an intresting endgame position on ICC.
>>>>
>>>>[D]8/8/6k1/3p4/3P4/2P2PKp/pB4b1/8 b - -
>>>>
>>>>This is the final position of a blitz game played by Amateur
>>>>with black. The game ended with rep. draw, but I feel black somehow
>>>>can win. Could you check the position? What is the winning plan?
>>>
>>>Crafty likes Kf5 from the get-go, but the evaluation does not climb over one
>>>pawn until ply 19. I'd be surprised if programs see a win at normal game-type
>>>time controls (other than 'postal' games).
>>
>>
>>Don't forget "good hardware". I get a fail high at depth=18, 35 seconds, on the
>>quad 550 (big hash, etc). score is +1.76:
>>
>> 18 35.99 ++ 1. ... Kf5!!
>> 18 1:06 1.76 1. ... Kf5 2. c4 dxc4 3. d5 Bf1 4.
>> Bh8 Be2 5. d6 Ke6 6. f4 Bg4 7. Be5
>> c3 8. Bxc3 Kxd6 9. Kh2 Bf5 10. Ba1
>
>In the above white can play 5. Kxh3 instead of d6. If 5. ... Bxf3 6. Kg3 Bxd5
>7. Kf2 = Unless black has something better?
This seems worse for white:
14-> 23.77 2.63 5. ... Bxf3 6. Kg3 Bxd5 7. Kf2 Ke4
8. Ke2 Bc6 9. Bc3 Bd7 10. Bh8 Be6 11.
Bc3 Bg4+ 12. Kd2 Bf3
(this is after 5. Kxh3)
>>
>>19 plies took 15 more seconds, up to +1.86. 20 was done in just over 2 minutes,
>>score creeping up slowly iteration by iteration.
>>
>>This might be found in a blitz game, the search would be faster if it had an
>>old hash table already primed with data. And thinking on the opponent's time
>>would likely help too.
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