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Subject: Re: Why is this position so difficult?

Author: Andreas Herrmann

Date: 12:26:39 05/21/02

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On May 21, 2002 at 01:00:36, Jouni Uski wrote:

>[D]1q1r3k/3P1pp1/ppBR1n1p/4Q2P/P4P2/8/5PK1/8 w - -
>
>None of my engines finds Rxf6 in reasonable time e.g. under 30 minutes! What's
>so
>special there, is it null-move problem may be? I guess Rebel can find it am I
>right?
>
>Jouni

Hi Jouni,

i'm not sure what's the problem with other programs and i don't know if Rxf6 is
the best move, but my engine Holmes (with not much chess knowledge implemented)
found it in ply one under 1 centisecond on my slow K6/2 450.
What moves want other programs here to play? Perhaps there is a better move.

>1.1      -118        1        135 1.f2f3 [ 14kNs  0:00 n135]
>1.7       -90        1        285 1.g2g1 [ 28kNs  0:00 n285]
>1.35      -63        1        355 1.d6f6 [ 36kNs  0:00 n355]
>2.35      -63        1        430 1.d6f6 [ ! 43kNs  0:00 n430]
>2.1         2        1        492 1.d6f6 b8e5 [ 49kNs  0:00 n492]
>3.1         2        1        671 1.d6f6 b8e5 2.f4e5 [ 67kNs  0:00 n671]
>4.1        39        4       3629 1.d6f6 b8e5 2.f6h6 g7h6 3.f4e5 [ 91kNs  0:00 n3629]
>5.1        39        7       7371 1.d6f6 b8e5 2.f6h6 g7h6 [ 105kNs  0:00 n7371]
>6.1        50       29      27743 1.d6f6 b8e5 2.f6h6 g7h6 3.f4e5 d8g8 4.g2f3 h8g7 [ 96kNs  0:00 n27743]
>7.1        43       62      58564 1.d6f6 b8e5 2.f6h6 g7h6 3.f4e5 d8g8 4.g2f3 h8g7 5.f3e4 [ 94kNs  0:00 n58564]
>8.1        55      162     168642 1.d6f6 b8e5 2.f6h6 g7h6 3.f4e5 d8g8 4.g2f3 h8h7 5.f3e4 h7g7 [ 104kNs  0:01 n168642]
>9.1       103      323     342310 1.d6f6 b8e5 2.f6h6 g7h6 3.f4e5 d8g8 4.g2h1 h8h7 5.f2f4 h7g7 6.f4f5 [ 106kNs  0:03 n342310]
>10.1       81      747     777524 1.d6f6 b8e5 2.f6h6 g7h6 3.f4e5 d8g8 4.g2f1 h8g7 5.f2f4 a6a5 6.f4f5 g7h8 [ 104kNs  0:07 n777524]
>11.1       85     2155    2348988 1.d6f6 b8e5 2.f6h6 g7h6 3.f4e5 a6a5 4.f2f4 h8g7 5.g2f3 d8b8 6.f4f5 b8g8 [ 109kNs  0:21 n2348988]
>12.1       93     5773    6100419 1.d6f6 b8e5 2.f6h6 g7h6 3.f4e5 d8g8 4.g2f3 h8g7 5.f3e4 a6a5 6.f2f4 g8b8 7.f4f5 b8g8 [ 106kNs  0:57 n6100419]

have a nice day
Andreas

http://wbholmes.de



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