Author: Klaus Friedel
Date: 13:08:11 10/16/03
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On October 16, 2003 at 10:02:58, Uri Blass wrote: >On October 16, 2003 at 09:18:27, Tord Romstad wrote: > >>On October 16, 2003 at 09:08:15, Lyn Harper wrote: >> >>> Why should it be moderately difficult? >> >>Simply because the combination is not really that deep. >> >>>Well, Chessmaster9000 could'nt solve it, just kept wanting to take the knight on >>>e5 after glancing at the correct >>>move for a nanosecond. Same with Ruffian. Good thing I did'nt offer $1 million >>>to the first solver. :) >>> And you come up with some obscure chess program, that I've never heard of, >>> and get the solution. >> >>It's not so obscure to me, as it happens to be my own program. :-) >> >>I would guess that most strong programs finds the right move rather quickly, >>but that CM9K and Ruffian have one of their few blind spots in this particular >>position. >> >>Tord > >Your guess is wrong. > >most programs are different than your program and your program has some >advantages relative to the top programs so the top programs cannot see the >following line in a reasonable time: > >1. Nf6+ Kg7 2. Nh5+ Kg6 3. Bc2+ Kxh5 4. d8=Q Nf7+ 5. Ke6 Nxd8+ 6. Kf5 e2 7. >Be4 e1=N 8. Bd5 c2 9. Bc4 c1=N 10. Bb5 Nc6 11. Bxc6 Nc7 12. Ba4 Nc2 13. >Bxc2 Ne2 14. Bd1 c4 15. Bxe2# >* > >They probably assume that black is winning because black has a big material >advantage. > >I guess that your program extend moves that threat mate in 2 like >10.Bb5 when other programs do not do it(even if they extend mate threat they may >not do it in positions when the side to move has only a bishop and pawn because >they were not designed to solve studies and in games it may be better not to >waste time on checking it). > > >Uri Whatever makes Gothmog special, Aristarch uses it as well. I wasn't able to find any other programm being able to solve this one. Bye, Klaus Friedel.
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