Author: Ratko V Tomic
Date: 21:04:42 08/10/99
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> So if searching one extra ply discovers something interesting, > then =Q will get played. If searching one extra ply discovers > something bad, then we avoid seeing the 'bad' by playing =R. That lack of common sense in the programs is typical. What is needed is some kind of causal reasoning i.e. it should somehow figure out that the "bad" thing <b>isn't caused by the extra mobility</b> of the Queen relative to Rook. For example, once it is about to pick =R, it should follow through the opponent's moves it found for =Q (where it ran into something bad; it doesn't matter that it isn't check for =R, opponent can still play whatever it did to get out of the check in =Q line). In most cases the result will be worse in the "=R" variation.
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