Author: Uri Blass
Date: 22:51:09 11/25/02
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On November 25, 2002 at 22:12:07, Russell Reagan wrote: >I'd like to know which free engines support the perft command, and more >specifically, if any will work with illegal positions. Perft is defined only for legal positions. Engines assume that the position is legal and if you give them positions when there are not exactly 2 kings or position when the side to move threats the king or positions when the king is threatened by 2 bishops then you can expect them to do strange things including deleting data that was important for you. I do not know about cases when programs did it but when a program does things like using uninitialized local varaible or trying to read from memory that does not exist then I can imagine that it can happen. The risk may be very small but there is no reason to increase it by giving the program an illegal position. Uri
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