Author: Dieter Buerssner
Date: 08:58:21 01/10/03
Go up one level in this thread
On January 10, 2003 at 11:19:40, Frank Phillips wrote:
>>>>8/p2RP3/4r3/3P1pp1/8/P2k1K2/8/8 b - - 0 47
>>>I get no indication of a draw even in the second (easy) position. I tried
>>>messing with extensions and the fifty move counter (changing it to a much
>>>smaller number), but still no joy.....
One idea would be to try it without hash (if you extend checks, it should be
findable without hash), and/or without null move.
>Can you print the pv from your engine, so I can get some indication of where
>mine is going wrong.
After 47...Re3 48. Kf2 Kd2 49. Kf1 (for example), it is clear, that any other
black move will be a check by the R. The white K is restricted to 9 squares -
the rectanggle f1-f3-h3-h1. It is clear, that the first repetition will be
before the K reached all those nine squares, because any second move will be to
the 2nd row. So, in the 7th move from now, it will be a repetion. For example
49...Re1+ 50. Kg2 Re2+ 51. Kh3 Re3+ 52. Kh2 Re2+ 53. Kg3 Re3+ 54. Kf2
Re2+ 55. Kf3 Re3+ 56. Kg2 {1st repetition)
Regards,
Dieter
PS. Another one, much longer, whery Yace got trapped by Tinker:
[D] 7k/6R1/6R1/1r5P/6K1/8/8/8 b - - 0 55
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