Author: h.g.muller
Date: 08:26:07 02/06/06
Go up one level in this thread
Node counting can be ambiguous, depending where in the program one does the counting. In my engine I count a node when I start generating moves, i.e. after that it turns out that the hash table result is not sufficient to provide the answer. But after that, even in an end leaf, the engine still goes through all the moves, to decide if the position they would reach is sufficiently different from the current position to warrant deeper searching of that move. This decision might depend on evaluation terms, like material, after the move (i.e. it takes into account what the move itself captures). So it is a matter of taste if you want to consider the positions after the moves the true end leaves, and count them as well. This might drive up the node count by an order of magnitude. Counting hash-table hits also as a node could also make an appreciable difference...
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