diff --git a/src/evaluate.cpp b/src/evaluate.cpp index cb1ad1f4..73e2144c 100644 --- a/src/evaluate.cpp +++ b/src/evaluate.cpp @@ -725,12 +725,17 @@ namespace { bool pawnsOnBothFlanks = (pos.pieces(PAWN) & QueenSide) && (pos.pieces(PAWN) & KingSide); + bool almostUnwinnable = !pe->passed_count() + && outflanking < 0 + && !pawnsOnBothFlanks; + // Compute the initiative bonus for the attacking side int complexity = 9 * pe->passed_count() + 11 * pos.count() + 9 * outflanking + 18 * pawnsOnBothFlanks + 49 * !pos.non_pawn_material() + - 36 * almostUnwinnable -103 ; // Now apply the bonus: note that we find the attacking side by extracting