Example #1
0
        public static int[] MakeList(Position pos, ref int material)
        {
            var list  = new int[6];
            int nlist = 0;

            for (Square sq = Square.SQ_09; sq <= Square.SQ_23; ++sq)
            {
                int piece = pos.SquareIs(sq);

                if (piece == Piece.Empty ||
                    piece == Piece.Wall)
                {
                    continue;
                }

                material += PieceValue[piece];

                if (Piece.Abs(piece) == Piece.BK)
                {
                    continue;
                }

                list[nlist++] = EvalIndex.IndexArray[piece] + EvalIndex.SquareToIndex(sq);
            }

            for (int p = Piece.BP; p < Piece.BK; ++p)
            {
                for (int i = 1; i <= pos.Stand(Color.BLACK, p); ++i)
                {
                    material     += PieceValue[p];
                    list[nlist++] = EvalIndex.IndexStandArray[p] + i;
                }
                for (int i = 1; i <= pos.Stand(Color.WHITE, p); ++i)
                {
                    material     -= PieceValue[p];
                    list[nlist++] = EvalIndex.IndexStandArray[p + 8] + i;
                }
            }

            Debug.Assert(nlist == 6);

            return(list);
        }
Example #2
0
        static void IncParam(Position pos, double dinc, Color turn)
        {
            if (turn == Color.WHITE)
            {
                dinc = -1 * dinc;
            }

            int dummy = 0;
            int bk    = EvalIndex.SquareToIndex(pos.KingPos(Color.BLACK));
            int wk    = EvalIndex.SquareToIndex(pos.KingPos(Color.WHITE));
            var list  = MakeList(pos, ref dummy);

            for (int i = 0; i < EvalIndex.ListSize; ++i)
            {
                int k = list[i];
                for (int j = 0; j < i; ++j)
                {
                    int l = list[j];
                    pData[bk, wk, k, l] += dinc;
                }
            }
        }
Example #3
0
        public static int Evaluate_kkpp(Position pos)
        {
            int material   = 0;
            int value_kkpp = 0;

            int bk = EvalIndex.SquareToIndex(pos.KingPos(Color.BLACK));
            int wk = EvalIndex.SquareToIndex(pos.KingPos(Color.WHITE));

            var list = MakeList(pos, ref material);

            for (int i = 0; i < EvalIndex.ListSize; ++i)
            {
                int k = list[i];
                for (int j = 0; j < i; ++j)
                {
                    int l = list[j];
                    value_kkpp += KKPP[bk, wk, k, l];
                }
            }

            int value = value_kkpp / FVScale + material;

            return(pos.SideToMove() == Color.BLACK ? +value : -value);
        }