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Subject: Re: For Ed and Christophe-- NO CHESS COMPUTER CAN SOLVE THIS!!!

Author: Mogens Larsen

Date: 02:05:53 11/25/00

On November 25, 2000 at 02:31:18, Timothy J. Frohlick wrote:

>Can your program solve this queen trap problem.  It may not be possible to solve
>with any of todays programs.
>
>[D]r3k2r/pp2ppbp/1q4p1/2npP3/5P2/2P5/PP4PP/RNBQR2K w
>
>This is an actual position that I got myself into when playing Rebel Century 3.0
>on my PII 333 64 MB RAM at 40/120. The move sequence with me to move is:
>
>1. Be3 Qxb2  2. Bxc5 Qxa1 3. Qa4+ Kf8  4. Qc2!! b6  5. Bd4 Rc8  6. Rd1 e6
>7. Na3 Qxd1  8. Qxd1 and the score is +2.30 in whites' favor.
>
>I found that neither RC3 nor Gambit Tiger would choose the move 1. Be3.
>
>Will any program on faster machines find that first move for white?  After that
>move will any program not select the pawn and then the rook capture?

Analysis by Gandalf 4.32f:

1.Qxd5 0-0
  =  (0.14)   Depth: 2   00:00:00
1.b4
  =  (0.17)   Depth: 2   00:00:00
1.b4 Ne4 2.Qxd5
  ±  (0.92)   Depth: 2   00:00:00
1.b4 Ne4 2.Qxd5
  ±  (0.92)   Depth: 3   00:00:00
1.b4 Ne4 2.Qxd5 Nf2+ 3.Kg1 0-0
  =  (-0.16)   Depth: 4   00:00:00
1.Qxd5
  =  (-0.12)   Depth: 4   00:00:00
1.Qxd5 Rd8 2.Qc4 0-0
  =  (0.06)   Depth: 4   00:00:00
1.Qxd5 Rd8 2.Qc4 0-0 3.Nd2
  ²  (0.48)   Depth: 5   00:00:00  12kN
1.Qxd5 Rd8 2.Qc4 0-0 3.Na3 Nd3
  =  (0.25)   Depth: 6   00:00:00  35kN
1.Qxd5 Rd8 2.Qc4 Nd3 3.Qa4+ Rd7 4.Rf1 Nxb2 5.Bxb2 Qxb2
  ²  (0.27)   Depth: 7   00:00:00  93kN
1.Qxd5 Rd8 2.Qc4 Nd3 3.Qa4+ Rd7 4.Be3 Qxb2 5.e6 fxe6
  =  (-0.12)   Depth: 8   00:00:01  264kN
1.Qe2
  =  (-0.09)   Depth: 8   00:00:11  264kN
1.Qe2 g5 2.fxg5 0-0-0 3.Na3 h5 4.Be3 h4 5.Bxc5 Qxc5
  =  (-0.01)   Depth: 8   00:00:15  264kN
1.Qc2
  =  (0.01)   Depth: 8   00:00:17  264kN
1.Qc2 g5 2.f5 Qc7 3.Be3 0-0-0 4.Bxc5 Qxc5 5.Nd2
  =  (0.12)   Depth: 8   00:00:19  264kN
1.Qc2 Qc6 2.Be3 0-0 3.Nd2 e6 4.Bxc5 Qxc5 5.Nb3 Qb6
  =  (0.04)   Depth: 9   00:00:28  3634kN
1.Qe2
  =  (0.08)   Depth: 9   00:00:33  3634kN
1.Qe2 Qc6 2.Be3 0-0 3.Nd2 Rac8 4.Bxc5 Qxc5 5.e6 f5
  =  (0.14)   Depth: 9   00:00:38  3634kN
1.Qe2 g5 2.f5 Ne4 3.Be3 Qh6 4.Qb5+ Qc6 5.Qxc6+ bxc6
  =  (0.16)   Depth: 10   00:01:29  11166kN
1.Qe2 g5 2.fxg5 h6 3.gxh6 Bxh6 4.Na3 Bxc1 5.Raxc1 0-0-0
  =  (0.17)   Depth: 11   00:02:56  22280kN
1.Qe2 g5 2.fxg5 h6 3.gxh6 Bxh6 4.Nd2 a6 5.b4 Bxd2
  =  (0.09)   Depth: 12   00:06:26  48106kN
1.Be3
  =  (0.12)   Depth: 12   00:08:25  48106kN
1.Be3 Qc6 2.Qd4 Rc8 3.Rd1 e6 4.c4 dxc4 5.Qxc4 0-0
  =  (0.24)   Depth: 12   00:12:27  48106kN

Best wishes...
Mogens

I am impressed with Gandalf 4.32f. It made a liar out of me. Timothy J. Frohlick 03:43:34 11/25/00
- Re: I am impressed with Gandalf 4.32f. It made a liar out of me. Mogens Larsen 05:27:13 11/25/00

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