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Subject: Re: What is the best move from this position?

Author: Richard Pijl

Date: 06:42:34 02/17/03

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On February 17, 2003 at 01:14:17, Thomas McBurney wrote:

>I picked up all my chess pieces, shuffled them, then threw them on the centre of
>my chessboard and got the following position.  I did make a few small
>adjustments to make the position legal.
>
>I'm interested in seeing if all chess engines come to the same conclusion with
>this unnatural chess position.
>
>
>[D]8/2pP4/kqP1Brb1/npBnRNr1/3QppP1/NpRppP1P/1PpP1bPK/8 b - - 0 1

The Baron 0.99.6b2 has difficulty in getting some search depth. 80 minutes for a
7 ply full-width search (but with extensions excluding quiescense up to 20 ply)
is a long time:

 ply       time     nodes  score  pv

  4(12)-      4    246239     66  e3d2 d7d8q f2g3 f5g3 f4g3 h2g3 c2c1q c5b6
d2d1q
  4(12)>      9    531371    -23  d5c3
  4(12)&      9    554865     35  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 c3e2 g3h2
  4(12).     11    631959     35  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 c3e2 g3h2
  5(12)&     14    820823     35  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 c3e2 g3h2
  5(14).     23   1304625     35  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 c3e2 g3h2
  6(18)-    108   5688730      0  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 c3e2 g3h2 c2c1q
d8a8 b6a7 a8a7
  6(18)&    120   6307861    -29  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 c3e2 g3h2 e2d4
  6(18).    134   7119197    -29  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 g5e5 c5b6 c2c1q
d8f6 c3e2 g3h2
  7(19)-    833  44578015    -64  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 c3e2 g3h2 c2c1q
d8c8 a5b7
  7(20)-   3803 206194810   -154  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 c3e2 g3h2 c2c1q
d8a8 b6a7 a8a7
  7(20)&   3893 211350464   -337  d5c3 d7d8q f2g3 f5g3 f4g3 h2g3 f6f3 g3h2 b6c6
d8c8 a5b7
  7(20)>   4402 240059889   -336  a5c6
  7(20)&   4510 246572671   -274  a5c6 d7d8q c6d8 c5b6 d5c3 d4c3
  7(20).   4819 264072783   -274  a5c6 d7d8q c6d8 c5b6 d5c3 d4c3


>
>Cheers,
>Tom.
>
>PS: Interesting; my Scisys 2150L has been processing this position for the last
>15 miniutes and so far has not found a move to play.



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