Author: John Merlino
Date: 17:44:38 08/05/02
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On August 05, 2002 at 19:44:46, Dieter Buerssner wrote: >Very recently, Christian Bartsch showed a very interesting position in the FCP >forum: > >[D] 6k1/ppb2p2/2p1rR1K/3p3p/6bP/N1PB2Pq/P4Q2/8 w - - > >It is from Jean Dufresne - Adolf Anderssen Berlin 1851. The only move to save >the game is Bg6. But this moves even wins. After: 1. Bg6 Qxg3 2. Bxf7+ Kh8 3. >Bxe6 Qxf2 4. Rxf2 Bxe6 Can any engine/mate solver see a forced mate after those >moves? > >[D] 7k/ppb5/2p1b2K/3p3p/7P/N1P5/P4R2/8 w - - 0 5 > >My engine cannot see it in reasonable time. When I analyze some variations from >back to front, I see, that Rf8+ can announce mate in 15 (or even shorter?) > >Regards, >Dieter No luck with Chessmaster 9000 (on a PIII-600 -- although it did find 1.Bg6 instantly). Analysis begins after your above line: Time Depth Score Positions Moves 0:00 1/5 0.19 9261 5.Rf6 Bg8 6.Kxh5 Be5 7.Rh6+ Bh7 8.c4 0:00 1/5 0.26 11923 5.Nc2 Ba5 6.Rf3 c5 7.Kxh5 Kg7 0:00 1/5 0.34 15241 5.Rf8+ Bg8 6.Re8 Bb6 7.Kxh5 d4 8.cxd4 Bxd4 0:00 1/6 0.38 24803 5.Rf8+ Bg8 6.Re8 Bb6 7.Kxh5 d4 8.cxd4 Bxd4 9.Kg5 Kh7 0:00 1/6 0.39 30476 5.Nc2 Ba5 6.Rf3 c5 7.Kxh5 Kg7 8.Kg5 0:01 1/7 0.40 62359 5.Nc2 c5 6.Rf6 Bg8 7.Kxh5 Be5 8.Rh6+ Kg7 9.Rg6+ Kh7 0:02 2/8 0.35 144997 5.Nc2 Kg8 6.Kxh5 c5 7.Rg2+ Kf7 8.Ne3 Bf4 9.Rf2 0:05 3/9 0.35 363038 5.Nc2 Kg8 6.Kxh5 c5 7.Re2 Bf7+ 8.Kg4 Ba5 9.Re3 Bg6 0:11 4/10 0.38 819382 5.Nc2 c5 6.Rf8+ Bg8 7.Kxh5 Be5 8.Ne3 Kg7 9.Rc8 b6 10.Rd8 Bxc3 11.Nxd5 0:25 5/11 0.36 2005177 5.Nc2 c5 6.Rf8+ Bg8 7.Rc8 Bf4+ 8.Kxh5 b6 9.Na3 Kg7 10.Ra8 a5 11.Kg4 Be5 12.Nb5 1:08 6/12 0.37 5730477 5.Nc2 Be5 6.Nd4 Bg8 7.Kxh5 c5 8.Ne2 Kg7 9.Rg2+ Kh7 10.Rg5 Bf6 11.Rg6 Bf7 1:37 6/12 0.49 8184302 5.Rf8+ Bg8 6.Re8 Bd6 7.Nc2 Bf4+ 8.Kg6 c5 9.Ne1 d4 10.cxd4 cxd4 11.Nd3 Bd6 12.Kxh5 Kg7 4:17 7/13 0.40 21093210 5.Rf8+ Bg8 6.Re8 Ba5 7.Nb1 d4 8.cxd4 Bb6 9.Kxh5 Bxd4 10.Kg5 b5 11.Nd2 c5 12.Nb3 11:48 8/14 0.81 59423363 5.Rf8+ Bg8 6.Nc2 c5 7.Ne3 Bd6 8.Re8 Bf4+ 9.Kxh5 Bxe3 10.Rxe3 d4 11.cxd4 cxd4 12.Re7 Bxa2 13.Rxb7 a5 14.Ra7 21:48 9/15 1.15 112265721 5.Rf8+ Bg8 6.Nc2 c5 7.Rc8 Bg3 8.Kxh5 Bf2 9.a4 b6 10.Ra8 a5 11.Rb8 c4 12.Rb7 Bh7 13.Kh6 Bg8 jm
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