Author: Uri Blass
Date: 07:44:06 10/02/03
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On October 02, 2003 at 10:13:13, Grzegorz Sidorowicz wrote: >On October 02, 2003 at 10:02:58, Grzegorz Sidorowicz wrote: > >> >>>>My Armageddon 2.250 on PIV 2Ghz without any magic extension >>>>can solve it fast and I think it is not bug. >>> >>>This is the line that it needs to see in order to solve it. >>>If 10 plies are enough then you do a lot of extensions. >> >> >>Armageddon extension: >>1. check (always), >>2. capture on the same square if SEE>=0 and >> we are not in check and opponent move was >> capture >>3. if we have got only one move >> >>...but if I detect check in QSearch I generate all moves. >>More extension I can't remember :-) >> >>Grzegorz > > >Second point again :-) >2. capture on the same square if SEE>=0 and > we are not in check and opponent move was > capture with SEE>=0 It is clear that you have a bug 1.Nc6+ Kb7 2.Na5+ Kb6 3.Bf2+ Kxa5 4.e8Q Nc7+ 5.Kd6 Nxe8 6.Kc5 d2 7.Bd4 d1N 8.Be5 f2 9.Bf4 f1N 10.Bg5 Nf6 11.Bxf6 Nf7 12.Bh4 Nf2 13.Bxf2 Nd2 14.Be1 Be2 15.Bxd2# the line is 29 plies. there are only 5 checks and there is no case of recapture or single reply. you need more than 20 plies to see 1.Nc6+ without bugs. Maybe the bug is not considering underpromotions(otherwise I cannot exaplain your result). Uri
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