Author: Miguel A. Ballicora
Date: 15:29:45 03/06/02
Go up one level in this thread
On March 06, 2002 at 17:09:19, Robert Hyatt wrote: >On March 06, 2002 at 16:21:22, Sune Fischer wrote: > >>On March 06, 2002 at 15:59:21, Robert Hyatt wrote: >> >>>On March 06, 2002 at 13:55:14, Terry McCracken wrote: >>> >>>>On March 06, 2002 at 13:09:05, Robert Hyatt wrote: >>>> >>>>>On March 06, 2002 at 11:20:17, Terry McCracken wrote: >>>>> >>>>>>[D]8/8/8/8/8/6P1/6k1/4KR1R w >>>>>> >>>>>> >>>>>>Mate in 3 >>>>>> >>>>>>Terry >>>>> >>>>> >>>>>This is a mate in 4, not a mate in 3, as confirmed by EGTBs... >>>> >>>>Dr. Hyatt with all due respect, EGTBs will _not_ help you with this type >>>>of problem. EGTBs look at it as an endgame where it's assumed the King and both >>>>Rooks have been moved. Maybe EGTBs can be adjusted for this situation? >>>> >>>>Castling is the correct solution, which forces mate in 3. >>>> >>>>BTW CM8000 in mate mode or in normal mode will find mate in 3 instantly! >>>> >>>>This problem created 145 years ago by Samuel Lloyd when he was not yet 16 years >>>>of age, is still considered one of the most famous problems in chess history. >>>> >>>>http://www.chessbase.com/puzzle/puzzle9/puzz9-6a.htm >>>> >>>>The solution can be found at this link. >>>> >>>>http://www.chessbase.com/puzzle/puzzle9/games/p9_6.htm >>>> >>>>Regards, >>>> Terry McCracken >>> >>> >>>Sorry, but if you check the +EPD+ posted for the position, there is _no_ >>>castling possible. Which means this is a simple mate in 4 and the EGTB >>>results are perfect. >> >>The position was: >>8/8/8/8/8/6P1/6k1/4KR1R w >> >>if there where no castling possible, shouldn't it have been: >>8/8/8/8/8/6P1/6k1/4KR1R w - >> >>leaving out the "-" probably indicates there might or might not be castle >>rights. >> >>Guess we need to feed the engines all possible combinations... >> >>-S. > > >The EPD standard is _very_ specific. There is no such thing as "castling >might be legal" because there is no such thing in the game of chess. It either >is or is not. The way to post diagrams in this forum is not FEN and it is not specific. Miguel >Leaving out the castle status results in invalid FEN. Putting it in in the >given position would also be invalid because the rook is missing.
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