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Subject: Hard test position

Author: Randy Lovelace

Date: 22:04:09 05/03/05

[D] rn3rk1/p2q1pp1/4p2p/2ppP1NQ/P7/2P1P3/2P3PP/R4RK1 w - - 0 17


Can any program find Rf6?

[Event "URS-ch06 Odessa qf1 "]
[Site "?"]
[Date "1929.01.01"]
[Round "?"]
[White "Bernstein, A"]
[Black "Sorokin, N"]
[Result "1-0"]
[ECO "C17"]
[Opening "French"]
[Variation "Winawer, advance, Bogolyubov variation"]

1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.Bd2 Ne7 6.a3 Bxc3 7.bxc3 b6 8.Nf3 Ba6
9.Bxa6 Nxa6 10.O-O Qd7 11.a4 Nb8 12.Be3 Nf5 13.dxc5 Nxe3 14.fxe3 bxc5 15.
Ng5 O-O 16.Qh5 h6 17.Rf6 Nc6 18.Rxh6 gxh6 19.Qxh6 f6 20.exf6 Ne5 21.Rf1
Rab8 22.Rf4 Rb1+ 23.Kf2 Rxf6 24.Qxf6 1-0

Shredder 9 finds it! (It's a pruning problem) Joachim Rang 02:59:47 05/05/05
Re: Hard test position (Crafty after Rf6) Renze Steenhuisen 14:07:51 05/04/05
- Re: Hard test position (Crafty after Rf6) Renze Steenhuisen 10:59:34 05/05/05
Re: Hard test position {several engines} Dann Corbit 10:01:34 05/04/05
Re: Hard test position (Crafty) Renze Steenhuisen 04:47:03 05/04/05
- Re: Hard test position (Crafty) Renze Steenhuisen 14:03:43 05/04/05
Re: Hard test position Jouni Uski 22:40:30 05/03/05
- Re: Hard test position Uri Blass 03:58:57 05/04/05
- Re: Hard test position Randy Lovelace 23:12:43 05/03/05
  - Re: Hard test position Vincent Lejeune 15:00:49 05/04/05
  - Re: Hard test position Uri Blass 00:44:25 05/04/05
    - Re: Hard test position Uri Blass 01:38:15 05/04/05
      - Re: Hard test position Joachim Rang 12:56:39 05/04/05
        
        Re: Hard test position Uri Blass 14:56:37 05/04/05
        
        Re: Hard test position Joachim Rang 02:50:27 05/05/05
        
        Re: Hard test position Karlo Bala 12:14:17 05/05/05
      - Re: Hard test position Uri Blass 01:43:45 05/04/05
        
        Re: Hard test position Uri Blass 02:03:40 05/04/05

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