Author: Frank Phillips
Date: 11:39:46 01/27/03
Go up one level in this thread
On January 27, 2003 at 02:16:09, Ricardo Gibert wrote:
>On January 27, 2003 at 00:36:13, Robert Hyatt wrote:
>
>>On January 27, 2003 at 00:18:55, Ricardo Gibert wrote:
>>
>>>I played a couple of 15 10 standard games against Crafty on ICC from the
>>>Searcher-Crafty CCT5 rook ending position, which had ended in a draw. The object
>>>was to see if the ending was really an easy win for Black i.e. if *I* can win
>>>it, anyone can ;)
>>>
>>>I played both 61...b5 and 61...Re8. The first game with 61...b5 got a little
>>>trickier than expected and the second was very simple, so I guess it could be
>>>said the position is "marginally easy." For those who are curious, here is the
>>>PGN for both games:
>>
>>The real question is "if you are playing black, with about 8 minutes on
>>your clock, and the clock ticking, can you find the way to win without making
>>any errors. As just one error is all it takes, particularly in the b5
>>line (as opposed to Re8 which looks a bit simpler after studying it).
>
>
>I prepared a little by playing Ruffian. My intention was to prepare by playing
>about 20 blitz games, but after going 3-0 easily against Ruffian, I got lazy. It
>was too easy and that was with 2 6 where I finished each game with more time
>than what I started with. In our games, I had to sit on my hands to keep from
>playing too quickly. You see, I don't play slow chess anymore and very rarely
>even play blitz. I'm a bullet addict.
>
>However, probably a more relevant question is how Crafty would have done against
>another engine. I have a feeling the draw against Searcherx may have been due to
>a poor eval for Rook endings.
Not sure it was the rook evaluation. I played too quick games against
Crafty19.2 and Searcher managed to win, without the Re8 method. (Before CCT5 I
was trying to discourage this approach.). Interestingly since CCT5 I have
changed extensions and pawn evaluation but not rook evaluation.
I am mildly amused that Bob is taking flak for my computer being too stupid to
win.
Frank
[Event "Computer chess game"]
[Site "asus.home.com"]
[Date "2003.01.27"]
[Round "-"]
[White "Crafty-19.2"]
[Black "Searcher"]
[Result "0-1"]
[TimeControl "300+3"]
[FEN "8/1p1R2pk/5p2/7P/7P/5Kn1/4r3/8 b - - 0 1"]
[SetUp "1"]
{--------------
. . . . . . . .
. p . R . . p k
. . . . . p . .
. . . . . . . P
. . . . . . . P
. . . . . K n .
. . . . r . . .
. . . . . . . .
black to play
--------------}
1... b5 2. Kxg3 Re5 3. Kg4 Re4+ 4. Kg3 Kh6 5. Rb7 Re5 6. Kg4 Rxh5 7. Rb8
Rc5 8. Rh8+ Kg6 9. h5+ Kf7 10. Rb8 Rg5+ 11. Kh4 Ke6 12. Rb6+ Kd7 13. h6
gxh6 14. Rxf6 Kc7 15. Rf1 b4 16. Rb1 Rb5 17. Rb3 Kd6 18. Kg3 Kc5 19. Kf4
Kc4 20. Rb2 b3 21. Kg4 Kc3 22. Rb1 b2 23. Kg3 Kc2 24. Rf1 b1=Q 25. Rf2+ Kc3
26. Rf3+ Kd4 27. Rf4+ Ke3 28. Rf3+ Kd2 29. Rf2+ Ke1 30. Rg2 Rg5+ 31. Kf4
Qb4+ 32. Kf3 Rxg2 33. Kxg2 Qg4+ 34. Kh2
{White resigns} 0-1
[Event "Computer chess game"]
[Site "asus.home.com"]
[Date "2003.01.27"]
[Round "-"]
[White "Crafty-19.2"]
[Black "Searcher"]
[Result "0-1"]
[TimeControl "900+3"]
[FEN "8/1p1R2pk/5p2/7P/7P/5Kn1/4r3/8 b - - 0 1"]
[SetUp "1"]
{--------------
. . . . . . . .
. p . R . . p k
. . . . . p . .
. . . . . . . P
. . . . . . . P
. . . . . K n .
. . . . r . . .
. . . . . . . .
black to play
--------------}
1... b5 2. Kxg3 Re5 3. Kg4 Re4+ 4. Kg3 Kh6 5. Rb7 Rb4 6. Rd7 Rb1 7. Kg4
Rg1+ 8. Kh3 Rh1+ 9. Kg4 Rg1+ 10. Kh3 Rb1 11. Kg4 b4 12. Rd8 Kh7 13. Rb8 b3
14. Kf3 b2 15. Kg2 f5 16. Rb6 f4 17. Rb7 f3+ 18. Kg3 Rg1+ 19. Kf2 b1=Q 20.
Rxb1 Rxb1 21. Kxf3 Re1 22. h6 Kxh6 23. Kf2 Re5 24. Kg3 Kh5 25. Kf4 Re7 26.
Kg3 Rf7 27. Kh3 Rf3+ 28. Kh2 Kxh4 29. Kg2 Rf4 30. Kh2 Rf2+ 31. Kh1 Kg4 32.
Kg1
{White resigns} 0-1
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