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Subject: Re: How long does it take your program to find Nf6! in this position?

Author: Miguel A. Ballicora

Date: 11:02:07 10/23/01

Go up one level in this thread


On October 23, 2001 at 13:12:38, Andrew Williams wrote:

>Hi,
>
>My program lost this game against a crafty clone on ICC recently:
>
>[Event "ICS rated blitz match"]
>[Site "204.178.125.65"]
>[Date "2001.10.21"]
>[Round "-"]
>[White "MoonShot"]
>[Black "PostModernist"]
>[Result "1-0"]
>[WhiteElo "2859"]
>[BlackElo "2772"]
>[TimeControl "600+2"]
>
>1. d4 Nf6 2. c4 c6 3. Nc3 e6 4. e4 Bb4 5. Bd3 d5 6. e5 dxc4 7. Bxc4 Nd5 8.
>Ne2 b6 9. O-O O-O 10. Qd3 Be7 11. Bd2 Bb7 12. Qg3 Kh8 13. Ne4 Ba6 14. Rac1
>Bxc4 15. Rxc4 Qd7 16. Bg5 Na6 17. Bxe7 Nxe7 18. Nd6 Nc7 19. Rfc1 Rad8 20.
>Qf3 Ne8 21. Ne4 Kg8 22. Qh3 a5 23. a4 Nc7 24. Qg4 Kh8 25. Qh5 Kg8 26. R1c3
>Qd5 27. Nf6+ gxf6 28. Rg3+ Kh8 29. Qh6 Ng6 30. Rh3
>{PostModernist resigns} 1-0
>
>
>The move 27.Nf6+ wins everything immediately. MoonShot (crafty 18.12
>on  a K7 1.33GHz) found that in 14 seconds (albeit with hash-tables
>already full). With some fiddling about with null move rules, PM can
>find it in 37 seconds from a "standing start" (K7 1.2GHz). I'd be
>interested to know how other programs do on this.
>
>[D]3r1rk1/2n1nppp/1pp1p3/p2qP2Q/P1RPN3/2R5/1P2NPPP/6K1 w - - bm Nf6

An experimental version of Gaviota sees it in 24 seconds on a pIII 800mhz
(depth=8).
A current version of Gaviota sees it in 84 seconds an depth=10 but the
score is not that high.

setboard 3r1rk1/2n1nppp/1pp1p3/p2qP2Q/P1RPN3/2R5/1P2NPPP/6K1 w - - bm Nf6
d
+-----------------+
| . . . r . r k . |
| . . n . n x x x |
| . x x . x . . . |
| x . . q o . . Q |
| o . R o N . . . |
| . . R . . . . . |
| . o . . N o o o |
| . . . . . . K . |
+-----------------+

analyze
      1518   1:      0.0    +1.15  Ne4-g5   h7-h6
      3238   2:      0.0    +1.15  Ne4-g5   h7-h6    <EMPTY>  <-transp
      7924   3       0.1      :-(
     11705   3:      0.1    +0.38  Qh5-g4   Nc7-e8   b2-b4    Qd5-d7
                                   b4xa5    b6xa5
     13980   4       0.1      :-)  Qh5-g4
     16043   4       0.2    +0.95  Qh5-g4   Nc7-e8   Ne4-f6   Ne8xf6
                                   e5xf6    Ne7-f5   f6xg7
     23073   4:      0.2    +0.95  Qh5-g4   Nc7-e8   Ne4-f6   Ne8xf6
                                   e5xf6    Ne7-f5   f6xg7
     40921   5       0.4    +0.98  Qh5-g4   Kg8-h8   Ne4-d6   c6-c5
                                   d4xc5    Qd5xe5   <-transp
    156491   5:      1.4    +0.98  Qh5-g4   Kg8-h8   Ne4-d6   c6-c5
                                   d4xc5    Qd5xe5   <-transp
    225090   6       2.1      :-(  Qh5-g4
    459071   6       4.1      :-(
    515181   6       4.5    +0.50  Qh5-g4   Qd5xe5   Ne2-g3   f7-f5
                                   Qg4-g5   Rd8xd4   Rc4xd4   Qe5xd4
                                   Qg5xe7   f5xe4    <-transp
    589761   6:      5.0    +0.50  Qh5-g4   Qd5xe5   Ne2-g3   f7-f5
                                   Qg4-g5   Rd8xd4   Rc4xd4   Qe5xd4
                                   Qg5xe7   f5xe4    <-transp
    656615   7       5.6    +0.50  Qh5-g4   Qd5xe5   Ne2-g3   f7-f5
                                   Qg4-g5   Rd8xd4   Rc4xd4   Qe5xd4
                                   <-transp
   1507577   7:     13.0    +0.50  Qh5-g4   Qd5xe5   Ne2-g3   f7-f5
                                   Qg4-g5   Rd8xd4   Rc4xd4   Qe5xd4
                                   <-transp
   1739172   8      15.2    +0.50  Qh5-g4   Qd5xe5   Ne2-g3   f7-f5
                                   Qg4-g5   Rd8xd4   Rc4xd4   Qe5xd4
                                   Qg5xe7   f5xe4    <-transp
   2714992   8      24.3      :-)  Ne4-f6
   2752469   8      24.7      :-)  Ne4-f6
   2820938   8      25.3      :-)  Ne4-f6
   4052228   8      36.6    +9.12  Ne4-f6   g7xf6    Rc3-g3   Kg8-h8
                                   Qh5-h6   Ne7-g6   Rg3-h3   Ng6-h4
                                   Rh3xh4   Qd5xg2   Kg1xg2   Rf8-g8
                                   Ne2-g3   Rg8-g7   Rc4xc6
   4340572   8:     39.0    +9.12  Ne4-f6   g7xf6    Rc3-g3   Kg8-h8
                                   Qh5-h6   Ne7-g6   Rg3-h3   Ng6-h4
                                   Rh3xh4   Qd5xg2   Kg1xg2   Rf8-g8
                                   Ne2-g3   Rg8-g7   Rc4xc6
   5346760   9      48.3    +9.12  Ne4-f6   g7xf6    Rc3-g3   <-transp
   6123771   9:     54.8    +9.12  Ne4-f6   g7xf6    Rc3-g3   <-transp
   8643434  10      77.2    +9.20  Ne4-f6   g7xf6    Rc3-g3   Kg8-h8
                                   Qh5-h6   Ne7-g6   Rg3-h3   Ng6-h4
                                   Rh3xh4   Qd5xg2   Kg1xg2   Rf8-g8
                                   Kg2-f3   Rg8-g7   Rc4xc6   Nc7-d5
                                   e5xf6
  11541072  10:    101.2    +9.20  Ne4-f6   g7xf6    Rc3-g3   Kg8-h8
                                   Qh5-h6   Ne7-g6   Rg3-h3   Ng6-h4
                                   Rh3xh4   Qd5xg2   Kg1xg2   Rf8-g8
                                   Kg2-f3   Rg8-g7   Rc4xc6   Nc7-d5
                                   e5xf6
  13562550  11     119.8      :-)  Ne4-f6
  16737135  11     147.8      :-)  Ne4-f6
  26478518  11     234.9   +11.13  Ne4-f6   g7xf6    Rc3-g3   Kg8-h8
                                   Qh5-h6   Ne7-g6   Rg3-h3   Ng6-h4
                                   Rh3xh4   Qd5-e4   Qh6xf6   Kh8-g8
                                   Rh4xe4   h7-h5    Rc4xc6   Nc7-d5

>
>
>Regards
>
>Andrew



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