Author: Pete Galati
Date: 07:43:57 07/04/99
Go up one level in this thread
On July 04, 1999 at 10:03:19, Pete Galati wrote:
>On July 04, 1999 at 01:47:51, Gerrit Reubold wrote:
>
>>On July 03, 1999 at 19:48:49, Pete Galati wrote:
>>
>>>On July 03, 1999 at 19:16:59, Gerrit Reubold wrote:
>>>
>>>>Hi all,
>>>>
>>>>please test your programs with the following position
>>>>
>>>>5rk1/1r3pp1/pp2pq2/3p4/3Q4/1PR5/P4PPP/4R1K1 w - -
>>>>
>>>>it is from a game which my program (Bringer) lost with white against The Crazy
>>>>Bishop. The draw is very easy to see (for humans): Qxf6 gxf6, and then rook
>>>>checks at h3, g3, f3... How long does your program take to find Qxf6 *with a
>>>>draw score*. How many plies / seconds? Question to the programmers: What do you
>>>>do to solve such positions fast? Extending on checks is not enough, my program
>>>>needs a 12 ply search (8 minutes on a PII-300) to find the draw (Qxf6 is found
>>>>earlier).
>>>>
>>>>Greetings,
>>>>Gerrit Reubold
>>>
>>>Every program that I ran that posistion through, Crafty, Comet, Phalanx and your
>>>Bringer all responded with QxQ. What did Bringer play in that game? I like
>>>Bringer allot, it works well with Winboard and it also has a very good interface
>>>of it's own.
>>>
>>>Pete
>>
>>Bringer likes Qd3 for some minutes, because I have a rule not to trade pieces
>>when behind in material, especially not when the opponent king is (a bit) less
>>safe. The Question was: how long do the other programs need to find the draw,
>>not only the key move. I tested Fritz5.16, the draw was seen instantly,
>>impressive. Hiarcs 6 does like QxQ instantly, but needs some minutes to see the
>>draw.
>>BTW: isn't QxQ a blunder as long as you don't see the draw, trading to an
>>endgame a pawn down?
>>
>>Greetings
>>Gerrit
>
>Judging it as a human player, and to be honest I didn't observe how long it took
>any of those programs to find a draw (I just had them play the next move), I
>think that QxQ is the correct move because then PxQ so R-kt3ch and the King has
>to move to the Rook file. But now because of the blacks pawn placement, I see no
> easy way to a checkmate, maybe a stronger player would, but I don't see it.
>
>I'm thinkink that the black King has to be sweating right now :-) I don't see it
>as a draw game, I see white winning this one, King safety is gone for the black
>side.
>
>Pete
Gerrit,
This has to show you what a lousy Chess player I am, but I ran that position
past a couple of Crafty programs, and although the first move was QxQ, the rest
was quite different than what I was expecting, I let it play for 20 moves, it
looked like white had lost the game (?) see below.
Pete
[Event "Computer chess game"]
[Site "DEFAULT"]
[Date "1999.07.04"]
[Round "-"]
[White "wCrafty-16_11"]
[Black "wCrafty-16_6"]
[Result "*"]
[TimeControl "60/900"]
[FEN "5rk1/1r3pp1/pp2pq2/3p4/3Q4/1PR5/P4PPP/4R1K1 w - - 0 1"]
[SetUp "1"]
{--------------
. . . . . r k .
. r . . . p p .
p p . . p q . .
. . . p . . . .
. . . Q . . . .
. P R . . . . .
P . . . . P P P
. . . . R . K .
white to play
--------------}
1. Qxf6 gxf6 2. Kf1 Rd8 3. Ke2 Kf8 4. Rec1 Ke7 5. g3 f5 6. h4 f4 7. Rc7+
Rd7 8. Rxd7+ Rxd7 9. g4 Kd6 10. h5 f6 11. f3 Rh7 12. Rc8 f5 13. Rb8 Kc5 14.
Rc8+ Kd4 15. Rc6 fxg4 16. fxg4 e5 17. Rxb6 e4 18. Rxa6 Rg7 19. Rg6 f3+ 20.
Kf2 Rf7 21. Re6
*
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