diff options
Diffstat (limited to 'src/evaluate.cpp')
| -rw-r--r-- | src/evaluate.cpp | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/src/evaluate.cpp b/src/evaluate.cpp index b1fc4f1..d2ee734 100644 --- a/src/evaluate.cpp +++ b/src/evaluate.cpp @@ -80,7 +80,19 @@ static std::array<int, 64> KING_TABLE_EARLY = { 20, 30, 10, 0, 0, 10, 30, 20, // }; -int EvaluateBoard(Game *g) { +static std::array<int, 64> KING_TABLE_LATE = + { + -50, -40, -30, -20, -20, -30, -40, -50, // + -30, -20, -10, 0, 0, -10, -20, -30, // + -30, -10, 20, 30, 30, 20, -10, -30, // + -30, -10, 30, 40, 40, 30, -10, -30, // + -30, -10, 30, 40, 40, 30, -10, -30, // + -30, -10, 20, 30, 30, 20, -10, -30, // + -30, -30, 0, 0, 0, 0, -30, -30, // + -50, -30, -30, -30, -30, -30, -30, -50, // +} + +int EvaluateBoard(Game * g) { int score = EvaluateBoardForWhite(g); return g->turn ? score : score * -1; }; @@ -111,7 +123,7 @@ static int ForceKingToEdgeBonus(const Position enemyKing, return bonus; } -int CountBoardMaterial(Game *g) { +int CountBoardMaterial(Game *g, bool isEndgame) { int score = 0; uint64_t piece_bitboard = g->PieceBitboard; @@ -151,7 +163,11 @@ int CountBoardMaterial(Game *g) { value += QUEEN_TABLE[RotateBoardForBlack(i, piece.color)]; break; case KING: - value = KING_TABLE_EARLY[RotateBoardForBlack(i, piece.color)]; + if (isEndgame) { + value = KING_TABLE_LATE[RotateBoardForBlack(i, piece.color)]; + } else { + value = KING_TABLE_EARLY[RotateBoardForBlack(i, piece.color)]; + } break; default: break; @@ -204,9 +220,10 @@ int EvaluateBoardForWhite(Game *g) { int score = 0; + bool isEndGame = IsEndgame(g); score += CountBoardMaterial(g); - if (IsEndgame(g)) { + if (isEndGame) { Position whiteKing = FindKing(g, true); Position blackKing = FindKing(g, false); |