Author: Heiner Marxen
Date: 08:09:19 03/06/02
Go up one level in this thread
On March 06, 2002 at 09:31:14, Bernhard Bauer wrote: >On March 06, 2002 at 09:19:04, Uri Blass wrote: > >>On March 06, 2002 at 08:26:49, Bernhard Bauer wrote: >> >>>On March 06, 2002 at 08:06:29, Jouni Uski wrote: >>> >>>>On March 06, 2002 at 05:37:14, Andreas Stabel wrote: >>>> >>>>>The discussion of castling possibility or not reminds me of a silly >>>>>similar problem somebody once presented me with: >>>>> >>>>>[D]8/8/8/8/1p2p3/1P1kP3/1P3P2/2K3N1 w Q - >>>>> >>>>>White to mate in half a move :) >>>>> >>>>>Best regards >>>>>Andreas Stabel >>>> >>>>This is easy Rd1 mate! >>>> >>>>Jouni >>> >>>Ahhhm, your basically right, even most people here would say your wrong, because >>>the FEN is wrong. :-)) >>>So let me give the position again with the corrected FEN: >>>[D]8/8/8/8/1p2p3/1P1kP3/1P3P2/2K3N1 w Q/2 - >>> >>>Please notice the Q/2 flag in the position. It obviously means that castling to >>>the queen side is allowed partially - exactly by a half. >>>This new feature will be part of the new epd description as soon as S. J. >>>Edwards has time to give a new request for comment (RFC). >>>Kind regards >>>Bernhard >> >>unfortunately I do not see a rook at a1 so I have to insist that the FEN is >>wrong or it is less than half move. >>half move of long castling is Ra1-d1 >> >>if the rook is in the air and not in the board then it should be >>less than half move. >> >>Uri > >Well, I thought a bit about your suggestion. It may not be the best way to place >the rook in the air. Indeed it may be better to give the position with the >following FEN: >[D]8/8/8/8/1p2p3/1P1kP3/1P3P2/R1K3N1 w Q/2 - > >Thank you for your excellent comment. Any programmer should give his comments >about this suggestion. >Kind regards >Bernhard I prefer [D]8/8/8/8/1p2p3/1P1kP3/1P3P2/2K3N1 w Q/4 - since O-O-O for white consists of 4 partial operations: (1) remove K at e1 (2) put K at c1 (3) remove R at a1 (4) put R at d1 And since just (4) is missing, and 3/4 of the castling are done already, the right to castle did shrink down to its last quarter :-)) I would say "white to move and mate in 1/4 move". Cheers, Heiner
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