Author: Martin Giepmans
Date: 05:11:55 12/25/02
Go up one level in this thread
On December 25, 2002 at 00:51:57, John Lowe wrote: >On December 24, 2002 at 18:11:51, Martin Giepmans wrote: > >>On December 24, 2002 at 12:32:55, John Lowe wrote: >> >>>On December 23, 2002 at 15:37:07, Martin Giepmans wrote: >>> >>>>On December 23, 2002 at 15:16:44, Mike Byrne wrote: >>>> >>>>>[d]R6R/3Q4/1Q4Q1/4Q3/2Q4Q/Q4Q2/pp1Q4/kBNN1KB1 w - - 0 1 >>>>> >>>>>So far , every Palm program and Chess Tiger have fatal errors with this >>>>>position. Supossedly, this is the largest number of possible legal number of >>>>>moves, 218, available from one position in chess. If you can prove this wrong, >>>>>you'll go down in History. >>>>> >>>>>http://www.rescon.de/Compu/schachzahl2_e.html >>>> >>>> >>>>"Qd2xb2 mate!" says my program. 29 nodes calculated to find this brilliancy. >>>> >>>>It didn't blow up, the monitor didn't explode in my face, the AMD-processor >>>>didn't implode, even my cigarette didn't catch fire ... >>>> >>>>I must say that I find this at least a little bit disappointing ;) >>>> >>>>Martin >>> >>>Hi Martin, >>> >>>You can borrow my failure if you like. >> >>Thanks! Do you really want it back? >>> >>>How did you manage to calculate 29 nodes before you found a mate in one? >> >>I don't know if you grinned when you wrote that. >>Do you mean that 29 is way too much for a mate in (only) one <grin> >>or do you mean that 29 is not enough? >> >>Martin > >Of course I grinned. The whole position is a party game. > >I'm trying to imagine which order you would have to evaluate moves in to have 28 >misses before finding one of the mates. > 29 nodes is the total number of nodes visited in the searchtree; even in the first iteration this is usually (much) more than the number of moves tried at the root. It probably did only a few moves at the root, found a mate and stopped. >My program generates little piece moves first and would have stumbled over the >knight mate - then it would(irrationally) have finished all the moves and >selected its favourite mate - which is why it crashed..... > > >Happy Christmas Happy Christmas too!
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