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Subject: Re: Challenge position for engines! (Lots of luck)

Author: Dann Corbit

Date: 20:33:09 03/04/02

Go up one level in this thread


On March 04, 2002 at 23:19:05, Dann Corbit wrote:

>On March 04, 2002 at 17:43:29, Albert Silver wrote:
>
>>The following position occurred in Spassky-Beliavsky, Reykjavik, 1988
>>
>>[D]2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - -
>>
>>Spassky found a tremendous move 25.Nxg6!! and won the game. I don't think any
>>engines will have much luck with it but feel free to try it. I've analyzed it in
>>detail and can verify that it is the strongest move and correct, so as a further
>>challenge, see if you can find the *strongest* continuation after the possible
>>defense: 25...hxg6 26.Qh6 Be6!?
>
>Phalanx has the solution as a book move:
>
>2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - -
>   0      0       0      0  book2 Nh4xg6

Phalanx with the book turned off:
2b1qrk1/5p1p/pBn3p1/1p2p3/4P2N/bBP1Q3/P4PPP/3R2K1 w - -
    -> increment adds 1440 s to soft time limit
    -> soft time limit 3154.28 s
    -> hard time limit 41599.9 s
  6    101    86    69055  Bb3-d5  Bc8-g4  Pf2-f3  Bg4-d7  Qe3-h6  Qe8-b8
  6 ->   0:01.14    95018   0 turns
  7    111   171   148653  Bb3-d5  Bc8-g4  Pf2-f3  Bg4-d7  Qe3-h6  Qe8-e7
                           Pc3-c4  Pb5xc4  Bd5xc4
  7 ->   0:06.61   342843   0 turns
  8    104  2439  1030470  Bb3-d5  Bc8-e6  Nh4-f3  Qe8-d7  Pc3-c4  Pb5-b4
                           Qe3-h6  Rf8-b8
  8 ->   0:27.00  1506280   0 turns
  9    104  3156  2339355  Bb3-d5  Bc8-e6  Nh4-f3  Ba3-d6  Qe3-h6  Pf7-f6
                           Nf3-d2
  9    107  4842  5498328  Qe3-h6  Bc8-e6  Rd1-d3  Qe8-c8  Bb3-d5
  9 ->   1:00.80  7632531   1 turn
 10    103 11241 17186609  Qe3-h6  Kg8-h8  Rd1-d3  Rf8-g8
 10    105 13739 21628540  Bb3-d5  Bc8-g4  Rd1-d3  Qe8-c8  Pc3-c4  Ba3-e7
                           Pc4xb5  Nc6-b4  Rd3-c3  Nb4xd5  Pe4xd5  Qc8-b7
 10 ->   2:55.49 28568827   1 turn
 11    107 36382 61848520  Bb3-d5  Ba3-e7  Nh4-f3  Kg8-g7  Rd1-c1  Be7-a3
                           Rc1-e1  Pf7-f6  Pc3-c4  Ba3-b4  Re1-b1
 11 ->  10:18.38 110775268   0 turns



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