Author: Mike S.
Date: 15:11:21 11/30/00
Go up one level in this thread
On November 30, 2000 at 04:11:11, Steve Schooler wrote:
>I disagree that f6 is the best move in 8/3Np3/7P/1p3P2/1k6/5K2/1b6/8 w
>
>1. f6 exf6 2. Ne5 Bxe5 3. Ke4 Kc4 4. h7 b4 5. h8Q seems to lead to a draw. I
>suspect that 1. Ke4 wins (pressuring Black's e-pawn), but the position is far
>too complicated for me to analyze.
Thanks for this reply, which is very sharp-witted indeed (after this short time)
... It took me years to recognise that there is this doubt in 1.f6, because it
really looks at first, as if black could defend here (KQ-KBPP). This position
has become more difficult for the new programs & computers than it was earlier,
because in the past, the search wasn't deep enough (i.e. without tb's) to raise
this doubt and the programs most often just satisfied with the material after
5.h8Q.
The position is a study from Henry Rinck. I have tried to analyse (unfortunately
with 4-piece tb's only) on the basis of a 10 hours Crafty search result, and I
still think that 1.f6 is correct and white can win; see the variation by Hiarcs
7.32 (F6 finds a mate within that):
[Event "[Crafty 10h]"]
[Site "?"]
[Date "1901.??.??"]
[Round "?"]
[White "Rinck"]
[Black "[+0031.22f3b4]"]
[Result "*"]
[SetUp "1"]
[FEN "8/3Np3/7P/1p3P2/1k6/5K2/1b6/8 w - -"]
1. f6 exf6 2. Ne5 Bxe5 3. Ke4 Kc3 4. h7 b4 5. h8=Q b3
6. Qc8+ Kb4 7. Qb7+ Ka3 8. Qa7+ Kb4 9. Qb6+ Kc4 10. Qc6+
Kb4 11. Kd5 b2 12. Qc2 Bc3 13. Qb1 (13. Qe4+ {(Hiarcs
7.32)} Kb3 14. Kc5 Be5 15. Qc4+ Ka3 16. Qc2 Ka2 17. Kb4 Ka1
18. Qa4+ {6.31/14 - F6 light finds a # in 15 here (with
4-piece tb's).} Kb1 19. Qd1+ Ka2) 13... Be5 14. Ke6 {From a
10h Crafty analysis with 2 billion nodes} *
Regards,
M.Scheidl
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