Author: Robert Hyatt
Date: 07:51:16 11/15/00
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On November 15, 2000 at 10:47:23, Wayne Lowrance wrote: >Kees, what is the f6 problem with the tiger. ? >Thanks >Wayne It doesn't understand that if white gets a pawn to f6, with the g-pawn moved to g6 or even removed from the board, then a queen at h6 is difficult to handle. In the first game discussed, that was the problem. There are several variations... all based on the black pawn formation h7 g6 f7 and e6/e5. If a pawn/bishop reaches f6, then a queen on h6 is almost always fatal. Same for the pawn/bishop on h6, although it is a bit easier to defend since you now need to cover f6 to prevent the queen from entering there. But f6 is easier to defend than h6. This makes a class of positions that also hurts null-move programs, as a null- move can take the position WQh6/WPf6 to the q-search where the mate might not be seen. This leads to grossly wrong search results.
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