Author: Daniel Shawul
Date: 02:28:28 06/09/04
Hi I read about the botvinnik-markoff extension in ccc archieve I have two questions concerning the method here is how i understood it do_null search(-beta+1,-beta,d-R-1) undo_null if(score > beta) return score else { if(score==-MATESCORE+ply+1) matethreat extension else if ( score < MARGIN) { threatmove = bestmove of ply+1 if(to(threatmove) == to(threatmove of ply-2) bm extension } } qn1. What is the value of margin. -2,-5 pawns? Or should it be something like score < alpha - 2pawns or score < material balance - 2pawns qn2. Should i trigger the extension also when the piece being threatened at ply-2 moves and the to square is now threatened? best daniel
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