X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=src%2Fmaterial.cpp;h=995a5b541e185e6a0e772e02fb879ba6c832e09a;hp=abad2abb923e053291bb22e41d21585b8573e47d;hb=45b0aea875860e9f0fe2d0435ee6163906639194;hpb=ee5514b8fdc6583d134985edd2f875e197830030 diff --git a/src/material.cpp b/src/material.cpp index abad2abb..995a5b54 100644 --- a/src/material.cpp +++ b/src/material.cpp @@ -173,10 +173,18 @@ 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)));