Author: Dann Corbit
Date: 00:50:06 06/22/99
Go up one level in this thread
On June 22, 1999 at 03:44:13, Dann Corbit wrote: >On June 22, 1999 at 03:27:09, Andreas Stabel wrote: > >>On June 21, 1999 at 15:20:39, Dann Corbit wrote: >> >>>The complete categorization of "fool's mate": >>>rnbqkbnr/pppp1ppp/4p3/8/5PP1/8/PPPPP2P/RNBQKBNR b KQkq f3 >>>rnbqkbnr/pppp1ppp/4p3/8/5PP1/8/PPPPP2P/RNBQKBNR b KQkq g3 >>>rnbqkbnr/pppp1ppp/4p3/8/6P1/5P2/PPPPP2P/RNBQKBNR b KQkq - >>>rnbqkbnr/pppp1ppp/4p3/8/6P1/5P2/PPPPP2P/RNBQKBNR b KQkq g3 >>>rnbqkbnr/pppp1ppp/8/4p3/5PP1/8/PPPPP2P/RNBQKBNR b KQkq f3 >>>rnbqkbnr/pppp1ppp/8/4p3/5PP1/8/PPPPP2P/RNBQKBNR b KQkq g3 >>>rnbqkbnr/pppp1ppp/8/4p3/6P1/5P2/PPPPP2P/RNBQKBNR b KQkq - >>>rnbqkbnr/pppp1ppp/8/4p3/6P1/5P2/PPPPP2P/RNBQKBNR b KQkq g3 >>>rnbqkbnr/pppp1ppp/4p3/8/5P2/7P/PPPPP1P1/RNBQKBNR b KQkq - >>>rnbqkbnr/pppp1ppp/4p3/8/5P2/7P/PPPPP1P1/RNBQKBNR b KQkq f3 >>>rnbqkbnr/pppp1ppp/4p3/8/8/5P1P/PPPPP1P1/RNBQKBNR b KQkq - >>>rnbqkbnr/pppp1ppp/8/4p3/5P2/7P/PPPPP1P1/RNBQKBNR b KQkq - >>>rnbqkbnr/pppp1ppp/8/4p3/5P2/7P/PPPPP1P1/RNBQKBNR b KQkq f3 >>>rnbqkbnr/pppp1ppp/8/4p3/8/5P1P/PPPPP1P1/RNBQKBNR b KQkq - >> >>I don't understand how this can be right. My program count all terminations >>in the usual way of generating the move tree and there are only eight >>move sequences that lead to a mate in the first four plies. Which clearly >>don't give fourteen distinct positions. >Here they are with the move sequence leading to mate listed. Take a look at >them in an EPD viewer. > >rnbqkbnr/pppp1ppp/4p3/8/5P2/7P/PPPPP1P1/RNBQKBNR b KQkq - id "C.A.P.581583"; acd >4; ce 32764; pv Qh4+ g3 Qxg3#; >rnbqkbnr/pppp1ppp/4p3/8/5P2/7P/PPPPP1P1/RNBQKBNR b KQkq f3 id "C.A.P.581584"; >acd 4; ce 32764; pv Qh4+ g3 Qxg3#; >rnbqkbnr/pppp1ppp/4p3/8/5PP1/8/PPPPP2P/RNBQKBNR b KQkq f3 id "C.A.P.613487"; acd >4; ce 32766; pv Qh4#; >rnbqkbnr/pppp1ppp/4p3/8/5PP1/8/PPPPP2P/RNBQKBNR b KQkq g3 id "C.A.P.581589"; acd >4; ce 32766; pv Qh4#; >rnbqkbnr/pppp1ppp/4p3/8/6P1/5P2/PPPPP2P/RNBQKBNR b KQkq - id "C.A.P.613497"; acd >4; ce 32766; pv Qh4#; >rnbqkbnr/pppp1ppp/4p3/8/6P1/5P2/PPPPP2P/RNBQKBNR b KQkq g3 id "C.A.P.613498"; >acd 4; ce 32766; pv Qh4#; >rnbqkbnr/pppp1ppp/4p3/8/8/5P1P/PPPPP1P1/RNBQKBNR b KQkq - id "C.A.P.581640"; acd >4; ce 32764; pv Qh4+ g3 Qxg3#; >rnbqkbnr/pppp1ppp/8/4p3/5P2/7P/PPPPP1P1/RNBQKBNR b KQkq - id "C.A.P.581753"; acd >4; ce 32764; pv Qh4+ g3 Qxg3#; >rnbqkbnr/pppp1ppp/8/4p3/5P2/7P/PPPPP1P1/RNBQKBNR b KQkq f3 id "C.A.P.581754"; >acd 4; ce 32764; pv Qh4+ g3 Qxg3#; >rnbqkbnr/pppp1ppp/8/4p3/5PP1/8/PPPPP2P/RNBQKBNR b KQkq f3 id "C.A.P.613628"; acd >4; ce 32766; pv Qh4#; >rnbqkbnr/pppp1ppp/8/4p3/5PP1/8/PPPPP2P/RNBQKBNR b KQkq g3 id "C.A.P.581759"; acd >4; ce 32766; pv Qh4#; >rnbqkbnr/pppp1ppp/8/4p3/6P1/5P2/PPPPP2P/RNBQKBNR b KQkq - id "C.A.P.613637"; acd >4; ce 32766; pv Qh4#; >rnbqkbnr/pppp1ppp/8/4p3/6P1/5P2/PPPPP2P/RNBQKBNR b KQkq g3 id "C.A.P.613638"; >acd 4; ce 32766; pv Qh4#; >rnbqkbnr/pppp1ppp/8/4p3/8/5P1P/PPPPP1P1/RNBQKBNR b KQkq - id "C.A.P.581804"; acd >4; ce 32764; pv Qh4+ g3 Qxg3#; Perhaps your calculations ignore e.p. status which is irrelevant. As you can see, this lists both mates as separate if we push the pawns in opposite order.
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