/* Header for scoring alogrithm */ int BAD_BISHOP = 6; int DOUBLED_PAWN = 8; int WEAK_PAWN = 5; int BACKWARD_PAWN = 7; int PAWN_ISLAND = 8; int PASSED_PAWN = 10; int PAWN_SHIELD = 7; int BISHOP_PAIR = 15; int ROOK_CONN = 10; int CON_PASSED_PAWNS = 400; int FILE_BONUS = 10; int HALF_FILE_BONUS = 5; int HAS_CASTLED = 15; int ROOK_KING_FILE = 2; int TRADE_PIECES = 2; int KEEP_PAWNS = 2; // values for having pieces near the king, changes with stage char king_proximity[4][7][8] = { { { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0,35,25,10, 5, 0, 0, 0 }, { 0, 5, 9, 9, 5, 0, 0, 0 }, { 0, 7, 5, 3, 3, 0, 0, 0 }, { 0, 7, 5, 3, 3, 0, 0, 0 }, { 0,15,12, 7, 5, 3, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0,35,25,10, 5, 0, 0, 0 }, { 0, 5, 9, 9, 5, 0, 0, 0 }, { 0, 7, 5, 3, 3, 0, 0, 0 }, { 0, 7, 5, 3, 3, 0, 0, 0 }, { 0,15,12, 7, 5, 3, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 5, 9, 9, 5, 0, 0, 0 }, { 0, 7, 5, 3, 3, 0, 0, 0 }, { 0, 7, 5, 3, 3, 0, 0, 0 }, { 0,15,12, 7, 5, 3, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0 }, { 0,-5,-3, 0, 2, 4, 7, 9 }, { 0, 5, 9, 9, 5, 0, 0, 0 }, { 0, 7, 5, 3, 3, 0, 0, 0 }, { 0, 7, 5, 3, 3, 0, 0, 0 }, { 0,15,12, 7, 5, 3, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 } } }; // Value of the pieces int value[7] = { 0, 100, 330, 330, 550, 1000, 10000 }; // Lazy eval cutoff during search int lazy[4] = { 150, 300, 600, 1000 }; // external search parameters /* extensions */ extern int THRESHOLD, CAPT_EXT, CHECK_EXT, PAWN_EXT, RE_CAPT_EXT; extern int INIT_EXT, MATE_EXT, PV_EXT, R, RAZOR_DEPTH; // Piece square tables short piece_sq[2][7][64]; // proto-types for piece square tables, first index is for the stage of // the game, 2nd index is for piece // stage 0 = opening // stage 1 = early middle-game // stage 2 = late middle-game // stage 3 = ending short proto_piece_sq[4][7][64] = { // Reading these is a little tricky. These tables // are set up to look like a chess board from white's // point of view, but they are indexed from black's // point of view. The whitef array is used to // map these values to the right squares for white. /*---------------------- Opening ------------------------*/ // For no piece ... { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For the pawn { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25, 25,-15,-15,-15, 0, 0, 0, 10, 10,-10,-10,-10, 0, 0, 0,-10,-10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For knight proto_piece_sq[KNIGHT] { -8, -6, -4, -4, -4, -4, -6, -8, -6, 0, 0, 0, 0, 0, 0, -6, -4, 7, 8, 8, 8, 8, 7, -4, -4, 7, 7, 8, 8, 7, 7, -4, -4, 6, 7, 8, 8, 7, 6, -4, -4, 5, 8, 6, 6, 8, 5, -4, -6, 0, 0, 5, 5, 0, 0, -6, -8,-10, -4, -4, -4, -4,-10, -8 }, // For bishop proto_piece_sq[BISHOP] = { 0, 0, 0, 0, 0, 0, 0, 0, -15, 0, 0, 0, 0, 0, 0,-15, 0, 0, 7, 8, 8, 7, 0, 0, 0, 7, 7, 8, 8, 7, 7, 0, 0, 7, 7, 8, 8, 7, 7, 0, 0, 0, 0, -5, -5, 0, 0, 0, 0, 5, 0, 0, 0, 0, 5, 0, 0, 0,-10, 0, 0,-10, 0, 0 }, // For rook proto_piece_sq[ROOK] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0 }, // For queen proto_piece_sq[QUEEN] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0 }, // For king proto_piece_sq[KING] = { -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -5, -5,-25,-25,-25,-25, -5, -5, 10, 10, 10,-15, 0,-15, 10, 10 } }, /*---------------------- Early Middle Game ------------------------*/ // For no piece ... { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For the pawn { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 25, 25, 0, 0, 0, 0, 0, 0, 25, 25,-15,-15,-15, 0, 0, 0, 10, 10,-15, -5, -5, 0, 0, 0,-10,-10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For knight proto_piece_sq[KNIGHT] = { -10, -7, -5, -5, -5, -5, -5,-10, -7, 2, 4, 4, 4, 4, 2, -7, -5, 7, 8, 8, 8, 8, 7, -5, -5, 7, 7, 8, 8, 7, 7, -5, -5, 6, 7, 8, 8, 7, 6, -5, -5, 3, 8, 6, 6, 8, 3, -5, -7, 0, 3, 5, 5, 3, 0, -7, -10,-10, -5, -5, -5, -5,-10,-10 }, // For bishop proto_piece_sq[BISHOP] = { 0, 0, 0, 0, 0, 0, 0, 0, -15, 0, 0, 0, 0, 0, 0,-15, 0, 0, 7, 8, 8, 7, 0, 0, 0, 7, 7, 8, 8, 7, 7, 0, 0, 7, 7, 8, 8, 7, 7, 0, 0, 0, 0, -5, -5, 0, 0, 0, 0, 5, 0, 0, 0, 0, 5, 0, 0, 0,-10, 0, 0,-10, 0, 0 }, // For rook proto_piece_sq[ROOK] = { 0, 0, 0, 0, 0, 0, 0, 0, 10, 10, 10, 10, 10, 10, 10, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 5, 0, 0, 0 }, // For queen proto_piece_sq[QUEEN] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For king proto_piece_sq[KING] = { -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -25,-25,-25,-25,-25,-25,-25,-25, -5, -5,-25,-25,-25,-25, -5, -5, 10, 10, 10,-15, 0,-15, 10, 10 } }, /*---------------------- Late Middle Game ------------------------*/ // For no piece ... { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For the pawn { 0, 0, 0, 0, 0, 0, 0, 0, 100,100,100,100,100,100,100,100, 20, 20, 20, 25, 25, 20, 20, 25, 10, 10, 10, 15, 15, 10, 10, 15, 5, 5, 5, 15, 15, 5, 5, 10, 3, 3, 3, 5, 5, 3, 3, 5, 0, 0, 0, -5, -5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For knight proto_piece_sq[KNIGHT] = { -10, -7, -5, -5, -5, -5, -5,-10, -7, 2, 4, 4, 4, 4, 2, -7, -5, 7, 8, 8, 8, 8, 7, -5, -5, 7, 7, 8, 8, 7, 7, -5, -5, 6, 7, 8, 8, 7, 6, -5, -5, 3, 8, 6, 6, 8, 3, -5, -7, 0, 3, 5, 5, 3, 0, -7, -10,-10, -5, -5, -5, -5,-10,-10 }, // For bishop proto_piece_sq[BISHOP] = { 0, 0, 0, 0, 0, 0, 0, 0, -15, 0, 0, 0, 0, 0, 0,-15, 0, 0, 7, 8, 8, 7, 0, 0, 0, 7, 7, 8, 8, 7, 7, 0, 0, 7, 7, 8, 8, 7, 7, 0, 0, 0, 0, 7, 7, 0, 0, 0, 0, 5, 0, 0, 0, 0, 5, 0, 0, 0,-10, 0, 0,-10, 0, 0 }, // For rook proto_piece_sq[ROOK] = { 0, 0, 0, 0, 0, 0, 0, 0, 10, 10, 10, 10, 10, 10, 10, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For queen proto_piece_sq[QUEEN] = { 0, 0, 0, 0, 0, 0, 0, 0, 10, 10, 10, 10, 10, 10, 10, 10, 0, 5, 7, 7, 7, 7, 5, 0, 0, 5, 7, 8, 8, 7, 5, 0, 0, 5, 7, 8, 8, 7, 5, 0, 0, 3, 5, 5, 5, 5, 3, 0, 0, 0, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For king proto_piece_sq[KING] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, /*---------------------- End Game ------------------------*/ // For no piece ... { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For the pawn { 0, 0, 0, 0, 0, 0, 0, 0, 100,100,100,100,100,100,100,100, 50, 50, 50, 50, 50, 50, 50, 50, 25, 25, 25, 25, 25, 25, 25, 25, 15, 15, 15, 15, 15, 15, 15, 15, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For knight proto_piece_sq[KNIGHT] = { -10, -7, -5, -5, -5, -5, -5,-10, -7, 2, 4, 4, 4, 4, 2, -7, -5, 7, 8, 8, 8, 8, 7, -5, -5, 7, 7, 8, 8, 7, 7, -5, -5, 6, 7, 8, 8, 7, 6, -5, -5, 3, 8, 6, 6, 8, 3, -5, -7, 0, 3, 5, 5, 3, 0, -7, -10, -7, -5, -5, -5, -5, -7,-10 }, // For bishop proto_piece_sq[BISHOP] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 5, 7, 7, 5, 5, 0, 0, 5, 7, 7, 7, 7, 5, 0, 0, 7, 7, 8, 8, 7, 7, 0, 0, 7, 7, 8, 8, 7, 7, 0, 0, 5, 7, 7, 7, 7, 5, 0, 0, 5, 5, 7, 7, 5, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For rook proto_piece_sq[ROOK] = { 0, 0, 0, 0, 0, 0, 0, 0, 5, 5, 5, 5, 5, 5, 5, 5, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For queen proto_piece_sq[QUEEN] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 5, 5, 5, 5, 5, 0, 0, 5, 7, 7, 7, 7, 5, 0, 0, 5, 7, 8, 8, 7, 5, 0, 0, 5, 7, 8, 8, 7, 5, 0, 0, 3, 5, 5, 5, 5, 3, 0, 0, 0, 3, 3, 3, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, // For king proto_piece_sq[KING] = { -25,-15,-10, -5, -5,-10,-15,-25, -15, 3, 5, 5, 5, 5, 3,-15, -10, 5, 7, 7, 7, 7, 5,-10, -5, 5, 7, 7, 7, 7, 5, -5, -5, 5, 7, 7, 7, 7, 5, -5, -10, 5, 7, 7, 7, 7, 5,-10, -15, 3, 5, 5, 5, 5, 3,-15, -25,-15,-10, -5, -5,-10,-15,-25 } } }; // white reference array to access piece-sq tables // black can access the arrays directly int whitef[64] = { 56, 57, 58, 59, 60, 61, 62, 63, 48, 49, 50, 51, 52, 53, 54, 55, 40, 41, 42, 43, 44, 45, 46, 47, 32, 33, 34, 35, 36, 37, 38, 39, 24, 25, 26, 27, 28, 29, 30, 31, 16, 17, 18, 19, 20, 21, 22, 23, 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7 };