Author: Heiner Marxen
Date: 06:49:28 01/17/02
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On January 17, 2002 at 02:37:21, Michael Diosi wrote: >Hi people, > >well here is the solution, white is really winning: > >1.Qe7 Kh8 2. Qg5 Kh7 3. Qe5 Kg8 4. Qf6 Kh7 5. Qf8 Kg6 6. Qe7 Kf5 7. Qd6 Ke4 >8. Qc5 Kd3 9. Qb4 Ke3 10. Qc4 Kf3 11. Qd4 Kg3 12. Qe4 Kh3 13. Qe6+ Kg3 14. Qf5 >Kh4 15. Qg6 Kh3 16. Qg5 Kh2 17. Qh4 Mate > >well thats what my source sais, and the solving program GUSTAV, agrees after >about 8 min and 30 sec. > > >Gtreetings > >Michael Ok, the first position was wrong (in German B=Bauer is a pawn, not a bishop). So, instead of [D]6k1/8/5Q2/8/8/8/3b1bb1/3Kbrrb w - - (which I did analyse yesterday) we now have [D]6k1/8/5Q2/8/8/8/3p1pp1/3Kbrrb w - - Now Chest agrees that white wins in 17 moves. Qe7 is the unique key for this: PV: Qe7 Kh8 Qg5 Kh7 Qe5 Kg8 Qf6 Kh7 Qf8 Kg6 Qe7 Kh6 Qf7 Kg5 Qe6 Kf4 Qd5 Kg4 Qd7+ Kh4 Qe7+ Kg3 Qf7 Kg4 Qf6 Kg3 Qf5 Kh4 Qg6 Kh3 Qg5 Kh2 Qh4# On an Athlon 1500+ with 128MB hash Chest needs 27.7 minutes for this. This time includes exclusion of any shorter mate and any other key for depth = 17 moves. Does GUSTAV guarantee the same? Cheers, Heiner
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