Author: Timothy J. Frohlick
Date: 03:43:34 11/25/00
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Mogens, Not only did Gandalf find the correct Be3 first move but it avoided taking the b2 white pawn and avoided at the same time the nasty b2-b4 pin attack on the black knight. I may be buying Gandalf 4.32f soon. Thank you, Tim Frohlick On November 25, 2000 at 05:05:53, Mogens Larsen wrote: >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
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