Author: leonid
Date: 18:41:05 06/04/01
Go up one level in this thread
On June 04, 2001 at 18:32:10, Uri Blass wrote: >On June 04, 2001 at 17:47:05, Heiner Marxen wrote: > >>On June 04, 2001 at 11:10:30, leonid wrote: >> >>>On June 02, 2001 at 23:54:08, leonid wrote: >>> >>>>Hi! >>>> >>>>If you would like to solve some easy mate then try this: >>>> >>>>[D]qqnqBB2/rqqNQQ2/kqQQQRnK/rqqNQR2/bbqQQQ2/8/8/8 w - - >> >>Hello Loenid, >> >>First it is "easy", then it is for champions... and after nearly 30 hours >>my K7/600 has not even finished depth 8! Geez! What exactly is easy about >>this one? Chest obviously does not get it. > >Chessmaster(ss=10) gets it > >It says that Nxc5+ is mate in 9 in 5 seconds on PIII850 > >It also needs time to finish depth 8 but it has no problem to finish >it. >depth 4 is enough to see mate in 9 and the evaluation does not change at >depthes 5-8 Very interesting coincidence! My program also solve this position by selective search (you speak for sure about selective, brute force could take days). It solve it at 9 moves when maximum responses number is put to 4. This "4" you indicate probably as "depth". >It needs 3:46 to get the same score for Nxc5+ at depth 8. >> >> >>>>I know that at Sunday we have more people coming to this place that usual. So, >>>>if you will find previous position just too little for you, then go with the >>>>next: >>>> >>>>[D]1Q1qq1Q1/2rnnr2/1rBkqBr1/2pbbp2/1NPPPN2/Q2R2Q1/2RKR3/1q3q2 w - - >> >>Well, I thought I'll try this second one, before the first is ready, but: >>there is no mate in 10, here (K7/600, 350 MB hash, 30 minutes). >>Does not look like an "easy" one, either. > >The mate for champions is clearly more easy. >Chessmaster6000(ss=10) says mate in 12 in 1 second at depth 4. This coincide as well. Excellent result! Obviosly Chessmaster reach its solution by selective search. It not say in certain way shortest solution for both positions. Cheers, Leonid. >The solution begins with 1.Bxe5+ >Chessmaster does not change it's mind even after finishing depth 8. > >Uri
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