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Subject: Re: How long to find the winning move?

Author: Brian Katz

Date: 18:20:30 01/12/02

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On January 12, 2002 at 17:54:49, Timothy J. Frohlick wrote:

>00:00:00.0	-0.70	13	147619
>f7-f5+ Ke4-f3 f5xg4+ Kf3xg4 d4-d3 Kg4-f3 Kg7-g6 Kf3-e3 Kg6-f5 Ke3-d2 Kf5xf4
>Kd2xd3 Kf4-g3 Kd3-e4 Kg3xh3
>
>00:00:00.1	-0.34	13	186637
>f7-f5+ Ke4-f3 f5xg4+ Kf3xg4 d4-d3 Kg4-f3 Kg7-g6 Kf3-e3 Kg6-f5 Ke3-d2 Kf5xf4
>Kd2xd3 Kf4-g3 Kd3-e4 Kg3xh3 Ke4-f3
>
>00:00:01.2	0.58	14	476363
>f7-f5+ Ke4-f3 f5xg4+ Kf3xg4 Kg7-f6 f4-f5 Kf6-e5 f5-f6 Ke5xf6 Kg4-f4 Kf6-e6
>Kf4-e4 Ke6-d6 Ke4-d3 Kd6-e5
>
>Gambit Tiger 2.0 on 1400 AMD with 512 MB DDR RAM
>Is that fast enough?
>
>On January 12, 2002 at 17:13:05, Brian Katz wrote:
>
>>[D]8/5pk1/2p5/p1p5/P1PpKPPp/1P5P/8/8 b - - 0 1
>>This is a position I from a skittles game that I had had as Black, with Black to
>>move. 1...f5!! is the winning move. After analysing this position after the
>>game, I wanted to see just how far away the Black King can be from the action
>>and still win. I placed the Black King on b6 and found that again, 1...f5 is the
>>winning move. The position is deceiving. I put this position is Fritz and it
>>finds 1...f5 pretty fast, but not instantly.
>>Deep Fritz and Fritz 6 seem to find it faster than Fritz 7a.
>>
>>I would like to know just how fast the Athlon 2000+ or the Pentium 4 2.2 gig
>>takes with Fritz 7, to find the winning move.
>>
>>[D]8/5p2/1kp5/p1p5/P1PpKPPp/1P5P/8/8 b - - 0 1
With the Black King on the b- file, it seems that the best Black can achieve is
a won Queen vs. Pawn ending. However, with Black King on the c-file or closer,
Black wins very easily, and the programs find the winning 1...f5+ very fast.
Fritz 7 doesn't select 1...f5+ right away when the Black King is on b6. It takes
a good number of minutes before it realizes that it is winning. Deep Fritz and
Fritz 6 find the move as winning much faster than Fritz 7a. This is on a  350
MHz Pent ll.
I find the position to be fascinating. With the Black King on g7, I found the
win quite fast during the game that I had played. It really is a pretty simple
position. CRITICAL SQUARES is what it is all about. The position is pretty
straight forward. However, with the Black King on b6, it does seem like it is
way out of the game. Imagine your opponent face in a position like that,
thinking the worst he could get as White would be a draw. AND THEN!! suddenly
1...f5+ !!!!!



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