Author: Sergei S. Markoff
Date: 21:31:25 09/25/04
The main idea is to improve pruning helping it not to cut relevant trajectory and other tactically important "quiet" moves. After making null move or reduct move in (ply-2) we must check some moves with extension. The classess of this movea are: 1. Moves of the piece that was moves on (ply-2). We can include only moves with capture/promotion/check and moves with see>=0. 2. Moves of the sliding piece, that was impossible before move at (ply-2). 3. Moves of the pieces to the squares that is now attacked by piece moved at (ply-2). We must also use method of "cutting" irrational trajectories for (1). I.e. moves a piece to some square if we can reach the same square at (ply-2). For example trajectory Ke1-g1; Kg1g2 is irrational. The same to Qa1-b3; Qb3-b2 e.t.c. We must not to extend (1) moves for irrational trajectories. I need your results to compare.
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