Author: blass uri
Date: 01:45:33 06/19/00
Go up one level in this thread
On June 19, 2000 at 03:03:49, Ed Schröder wrote: >On June 18, 2000 at 19:46:03, Dave Gomboc wrote: > >>On June 18, 2000 at 18:21:01, Ed Schröder wrote: >> >>>On June 18, 2000 at 16:34:16, blass uri wrote: >>> >>>>On June 18, 2000 at 12:00:08, Ed Schröder wrote: >>>> >>>>>On June 18, 2000 at 10:36:40, Gian-Carlo Pascutto wrote: >>>>> >>>>>>On June 18, 2000 at 10:17:08, Ed Schröder wrote: >>>>>> >>>>>>>According Rebel it is a mate in 10. >>>>>>> >>>>>>>Ed >>>>>>> >>>>>>>00:00 07.00 0.81 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Rxh7 Ke8 4.Rh8+ Kd7 5.Qf5+ Kc7 >>>>>>>00:01 08.00 2.37 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Rxh7 Ke8 4.Qf5 Kd8 5.Qxf7 Kc8 >>>>>>>6.Qxe7 >>>>>>>00:03 09.00 2.47 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Rxh7 Ke8 4.Qf5 Kd8+ 5.Qxf7 Kc7 >>>>>>>6.Qxe7+ Kc8 >>>>>>>00:43 10.00 11.74 1.Rxh5 gxh5 2.Rxh5 Kf8 3.Rxh7 e6 4.Bf6 Ke8 5.dxe6 Qxc4+ >>>>>>>6.Qxc4 >>>>>>>02:35 11.00 Mate in 10 moves 1.Rxh5 Kf8 Rxh7 2.Ke8 Rxf7 3.Qxc4 Qxc4 4.g5 Rhh7 >>>>>>>5.b5 Rxe7+ 6.Kd8 >>>>>> >>>>>>I find it interesting to notice that even Rebel has some trouble with this, >>>>>>taking more than 10 times as much time to resolve the 10th ply. >>>>> >>>>>That's pretty normal whith such big score differences (2.47 -> 11.74) as >>>>>search is confrontated with big score fluctuations which causes move >>>>>ordering to collapse. I wouldn't bother too much about it, it's quite >>>>>normal. >>>> >>>>Not for all programs. >>> >>>Of course. >>> >>>>Chessmaster6000(ss=10) can see a forced mate in only 4 seconds and does not have >>>>a big branching factor >>> >>>Sure. Maybe not in this position. >>> >>>>This is normal for chessmaster to see mates clearly faster than other programs >>>>and I think that this is because the other programs do some mistakes in their >>>>search rules. >>> >>>Nope. Johan has special (mate) stuff in his search no program has. >>> >>>Ed >> >>Just curious... why don't you add it to Rebel too? :-) > >a) because I don't know "exactly" what it is; >b) too much emphasis on mates loses too much elo points in games. > >Ed I think reason a is the right reason because I do not think that chessmaster loses too much elo points in games(chessmaster6000 is one of the top programs and is only one point behind Fritz5.32 in the ssdf list inspite of having no learning function and having an older engine) I believe that having special mate stuff is productive for chess programs if you do it in the right way. Uri
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