Author: Heiner Marxen
Date: 05:42:57 08/07/02
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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?) According to Chest there is no mate in 12. That needs 10.3 hours on an Athlon 1500+ machine, so I will not go any deeper (EBF around 8). Perhaps after some more moves from the main line Chest can prove the rest. Also, maybe some PN-searcher has more luck. >Regards, >Dieter Cheers, Heiner
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