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Subject: Re: How long to find White's winning move?

Author: Miguel A. Ballicora

Date: 19:28:30 01/02/02

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On January 02, 2002 at 18:29:56, Roy Eassa wrote:

>How long does it take your program/engine to find White's winning move (and to
>achieve a score that shows the program understands that White is winning)?
>
>[D] r4b1k/pp3Ppp/n1p5/2q1B3/2r5/6RP/PP2Q1P1/5R1K w - - 0 1

Gaviota 0.24 (unreleased) takes a long time to see b4 (1025.6 secs ~17 min)
on a AMD K6-2 400 mhz.
Nice problem, b4 is a fantastic move. Not easy for humans because of the
quiet Rg5! after a not so loud b4!!

   2148391   8:     54.5    +0.25  Rg3-e3   Rc4-c2   Be5xg7   Bf8xg7
                                   Re3-e8   Bg7-f8   Qe2-g4   Rc2xg2
                                   Qg4xg2   Na6-c7
   3109617   9      79.9    +0.36  Rg3-e3   Ra8-b8   Be5xb8   Na6xb8
                                   Re3-e8   Nb8-d7   Re8-d8   Rc4-c2
                                   Qe2-e4
   6555992   9:    163.7    +0.36  Rg3-e3   Ra8-b8   Be5xb8   Na6xb8
                                   Re3-e8   Nb8-d7   Re8-d8   Rc4-c2
                                   Qe2-e4
   8945792  10     224.7    +0.02  Rg3-e3   Ra8-b8   Be5xb8   Na6xb8
                                   Re3-b3   b7-b5    Rb3-d3   Rc4-d4
                                   Qe2-e3   Rd4xd3   Qe3xd3
  39255238  10    1025.6      :-)  b2-b4
  45475907  10    1195.8    +1.46  b2-b4    Rc4xb4   Rg3-g5   h7-h6
                                   Qe2-h5   Qc5-d6   Be5xd6   Bf8xd6
                                   Rf1-d1   Bd6-c7
  49219664  10:   1284.4    +1.46  b2-b4    Rc4xb4   Rg3-g5   h7-h6
                                   Qe2-h5   Qc5-d6   Be5xd6   Bf8xd6
                                   Rf1-d1   Bd6-c7
  67497684  11    1786.0      :-)  b2-b4
  92302110  11    2452.1    +2.36  b2-b4    Rc4xb4   Rg3-g5   h7-h6
                                   Qe2-h5   Qc5-d6   Be5xd6   Bf8xd6
                                   Rg5-g6   Bd6-f4   Qh5-f5

Regards,
Miguel





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