Author: Miguel A. Ballicora
Date: 07:20:12 03/10/02
Go up one level in this thread
On March 09, 2002 at 21:21:06, Olaf Jenkner wrote: >After 9,5 hours (PII 333MHz, 88 MB hash) Gustav says "no mate in 17". >It is possible to reach mate in 19 with brute force > >By the way I detected a dual in the third move: Yes, on the third move there are two equivalent options. You either give space to avoid the stalemate with a king or a pawn. I noticed that because the second one you give is the one I found by myself and the first one is the one that CM found. It is a pitty that a black pawn has to end in d3 (b1=Q would check a king on g6), otherwise the solution will be unique along the 19 moves... Regards, Miguel > >1.f7-e8S Bd4-d3 2.Se8-f6 Bg7-f6 3.Kf5-f4 Bf6-f5 4.Bg6-g7 Bf5-g4 5.g7-g8S Bg4-g3 >6.Sg8-f6 Be7-f6 7.Be6-e7 Bf6-f5 8.Kf4-g5 Bf5-f4 9.e7-e8S Bf4-f3 10.Se8-d6 Bc7-d6 >11.Bc6-c7 Bd6-d5 12.c7-c8S Bd5-d4 13.Sc8-b6 Ba7-b6 14.Ba6-a7 Bb6-b5 15.a7-a8S >Bb5-b4 16.Sa8-b6 Bb4-b3 17.Sb6-c4 Bb3-b2 18.Sc4-e5 nebst 19.Se5-f3# > >..................................................................................................................................................................................................................................................................... >17.Sb6-d7 Bb3-b2 18.Sd7-e5 nebst 19.Se5-f3# > >.................................................................................................................................................................................................................................................... >16.Sa8-c7 Bb4-b3 17.Sc7-b5 Bb3-b2 18.Sb5-d4 nebst 19.Sd4-f3# > >..................................................................................................................................................................................................................................................................... >17.Sc7-e6 Bb3-b2 18.Se6-d4 nebst 19.Sd4-f3# > .............................. 3.Bg4-g5 Bf6-g5 4.Bg6-g7 Bg5-g4 5.g7-g8S Bg4-g3 >6.Sg8-f6 Be7-f6 7.Kf5-g6 Bf6-f5 8.Be6-e7 Bf5-f4 9.e7-e8S Bf4-f3 10.Se8-d6 Bc7-d6 >11.Bc6-c7 Bd6-d5 12.c7-c8S Bd5-d4 13.Sc8-b6 Ba7-b6 14.Ba6-a7 Bb6-b5 15.a7-a8S >Bb5-b4 16.Sa8-b6 Bb4-b3 17.Sb6-c4 Bb3-b2 18.Sc4-e5 nebst 19.Se5-f3# > >..................................................................................................................................................................................................................................................................... >17.Sb6-d7 Bb3-b2 18.Sd7-e5 nebst 19.Se5-f3# > >.................................................................................................................................................................................................................................................... >16.Sa8-c7 Bb4-b3 17.Sc7-b5 Bb3-b2 18.Sb5-d4 nebst 19.Sd4-f3# > >..................................................................................................................................................................................................................................................................... >17.Sc7-e6 Bb3-b2 18.Se6-d4 nebst 19.Sd4-f3# > >...................................................................................................................................................................................................................................................................................... >18.Se6-g5 nebst 19.Sg5-f3# > .............. 2....... Be7-f6 3.Kf5-f4 Bf6-f5 4.Be6-e7 Bf5-g4 5.e7-e8S Bg4-g3 >6.Se8-d6 Bc7-d6 7.Bc6-c7 Bd6-d5 8.c7-c8S Bd5-d4 9.Sc8-b6 Ba7-b6 10.Ba6-a7 Bb6-b5 >11.a7-a8D Bb5-b4 12.Da8-f3 Bb4-b3 13.Df3-g3 Bb3-b2 14.Kf4-f3 nebst 15.Dg3-f2# > > >OJe
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