Author: Dan Andersson
Date: 08:44:58 09/19/03
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There is an easy way of culling many illegal positions. I think I posted it here a long time ago. It amounts to calculating how many pawns of same color there are inside the 'event horizon' for each square. The maximum speed of a pawn being <+1,+/-1>. It is easily calculated during a backtracking construction algorithm. I don't know what the reduction factor is. But it should be relatively easy to guesstimate by analyzing a backtracker algorithm. MvH Dan Andersson
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