Author: Paulo Soares
Date: 18:29:01 08/17/00
Go up one level in this thread
On August 17, 2000 at 19:37:47, Vincent Diepeveen wrote: >On August 17, 2000 at 18:22:37, Dann Corbit wrote: > >>On August 17, 2000 at 18:08:36, Vincent Diepeveen wrote: >> >>>On August 16, 2000 at 18:41:59, Lars Sandin wrote: >>> >>>>On August 16, 2000 at 17:48:20, Dann Corbit wrote: >>>> >>>>>On August 16, 2000 at 17:35:44, Jari Huikari wrote: >>>>> >>>>>>On August 16, 2000 at 17:23:33, Dann Corbit wrote: >>>>>> >>>>>>>Took 2 seconds to solve the hardest two. The other took one second. The >>>>>>>machine was not a very fast one. On one of the fast machines, it would probably >>>>>>>do a lot better. >>>>>> >>>>>>Was the program searching especially for mates? >>>>> >>>>>Chest 3.19 by Heiner Marxen (the best mate solver on the planet by a landslide). >>>>> >>>>>>How much time would need >>>>>>to find the moves, if these positions were in normal game? >>>>> >>>>>Infinite. It does not play chess, since it's just a mate solver. On the other >>>>>hand, on a multithreading machine, you could have the mate solver buzzing away >>>>>in its own little thread while your chess engine is playing chess in a normal >>>>>fashion. Then, if the mate solver sees something interesting, it could report >>>>>it to the chess engine. It is actually an idea I have been entertaining, and >>>>>incredibly simple to implement. >>>> >>>>How fast (approx.) does the program see longer mate-sequences; for instance in a >>>>normal game - a mate in about 10 moves? >>> >>>Oh well it's a mate only searcher. Let's give it a huge mate >>>(which a selective searcher could find real quick btw) >>> >>>8/Bk3p1p/1P3p2/KP2n2p/1P1p4/1Pp2p2/B1P5/7B w - - >>> >>>If it finds a mate here, please post the line, >>>as i don't have the winning line for this position. I know how to win >>>it, but DIEP will not soon see a mate here, stack problem... >>>...but i like to keep my mating probs complete. >> >>That's not a mate in 10. It is more than 20 ply to any mate from that position. > >Oh well, some selective searchers have no problem finding this mate, >though it's way more as 20*20 ply :) I think that below is the position that the white ones have to get to win the game and, consequently, to give the checkmate. I got this position after 191 moves, or 382 plies and after 3 hours. Poor white king, has to walk a lot :) [D] 8/Bk6/1P6/KP2np2/1P1p1p2/1Pp2p1p/2P4p/1B5B b - - 0 191 Paulo Soares, from Brazil
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