Author: John Merlino
Date: 13:45:12 04/24/05
Go up one level in this thread
On April 24, 2005 at 16:40:26, Ricardo Gibert wrote: >On April 24, 2005 at 16:28:06, Vincent Lejeune wrote: > >>On April 24, 2005 at 15:05:41, John Merlino wrote: >> >>>On April 24, 2005 at 14:31:52, Jack Lad wrote: >>> >>>>[d] 6nr/p2rkp1n/1pQRq1pp/1N2P3/8/4BN1P/PPP2PP1/2K4R w >>>> >>>>1.Nc7 or Nfd4? >>>> >>>>Or can they both mate in the same number of moves? >>> >>>Playing through the lines, it appears that: >>> >>>1.Nc7 is a Mate in 9. >>> >>>1.Nfd4 is a Mate in 11. >>> >>>jm >> >>3 best moves from ChessMaster 10 (AMD@3000+) >> >>Time Depth Score Positions Moves >>9:38 1/13 Mate09 233251425 1.Nc7 Rxc7 2.Qxc7+ Kf8 3.Rxe6 Kg7 >> 4.Nh4 Ng5 5.Bxg5 Ne7 6.Bf6+ Kh7 >> 7.Qxe7 Rf8 8.Qxf8 fxe6 9.Qg7# > >You need to be careful with 1.Nc7. If CMX is anything like Ruffian, it will get >a mate score, lose it, get it again only to lose it again while shifting from a >best response to it of Rxc7, Nf8, Qf5 and Ngf6 all the while. Ruffian had a >tough time with 1.Nc7. It took 5 times longer to reach the same depth of 14 that 1.Rxe6 got and ultimately lost the mate score. Chessmaster will never lose a mate score for the side to move. Once it reports a mate, the only thing it can do is possibly report a shorter mate. Therefore, my "playing with the lines" (which you comment on in another post) was merely to ensure that there was no shorter mate than the ones that The King found relatively quickly. jm
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