X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmaterial.cpp;h=0f1e19b9ee4a954f69bb84844e9227110f21709a;hp=995a5b541e185e6a0e772e02fb879ba6c832e09a;hb=27f2ce8f6e8462bd9be4b201dd95fc2df17aafe6;hpb=490f67a3f89449e243c3e85feb13679f388d9e22 diff --git a/src/material.cpp b/src/material.cpp index 995a5b54..0f1e19b9 100644 --- a/src/material.cpp +++ b/src/material.cpp @@ -173,18 +173,10 @@ Entry* probe(const Position& pos, Table& entries, Endgames& endgames) { return e; } - // Draw by insufficient material (trivial draws like KK, KBK and KNK) - if ( !pos.pieces(PAWN) - && pos.non_pawn_material(WHITE) + pos.non_pawn_material(BLACK) <= BishopValueMg) - { - e->evaluationFunction = &EvaluateKmmKm[pos.side_to_move()]; - return e; - } - - // Minor piece endgame with at least one minor piece per side and - // no pawns. Note that the case KmmK is already handled by KXK. if (!pos.pieces(PAWN) && !pos.pieces(ROOK) && !pos.pieces(QUEEN)) { + // Minor piece endgame with at least one minor piece per side and + // no pawns. Note that the case KmmK is already handled by KXK. assert((pos.pieces(WHITE, KNIGHT) | pos.pieces(WHITE, BISHOP))); assert((pos.pieces(BLACK, KNIGHT) | pos.pieces(BLACK, BISHOP))); @@ -248,7 +240,8 @@ Entry* probe(const Position& pos, Table& entries, Endgames& endgames) { } } - // No pawns makes it difficult to win, even with a material advantage + // No pawns makes it difficult to win, even with a material advantage. This + // catches some trivial draws like KK, KBK and KNK if (!pos.count(WHITE) && npm_w - npm_b <= BishopValueMg) { e->factor[WHITE] = (uint8_t)