private float evaluate(Board board) {
		BoardValue bvalue = new BoardValue();
		for (Location dir : DIRECTIONS) {
			for (int i = 0; i < board.getSize(); i++) {
				RowValue rowval = new RowValue();
				for (int r = (dir.getCol() == 0) ? i : 0, 
						col = (dir.getRow() == 0) ? i : 0; 
						r < board.getSize() && col < board.getSize();
						r += dir.getCol(), col += dir.getRow()) {
					int row = (dir.getCol() == -1) ? board.getSize() + r - 1 : r;
					rowval.add(board.brickAt(row, col));
				}
				if (rowval != null && rowval.length() == board.getSize())
					bvalue.addRowValue(rowval);
				if (dir.getRow() != 0 && dir.getCol() != 0)
					break;
			}
		}
		return bvalue.getValue(me);
	}
// BoardValue
	public float getValue(Brick player) {
		float value = 0;
		for (RowValue rowval : rows) {
			value += rowval.value(player);
		}
		return value;
	}
//RowValue
	public float value(Brick player) {
		if ((noughts > 0 && crosses > 0) || length == empty)
			return 0;
		int players = (player == Brick.CROSS ? crosses : noughts);
		if (players == length)
			return Float.POSITIVE_INFINITY;
		if (players + empty == length)
			return players / (float) empty;
		if (players == 0 && empty == 0)
			return Float.NEGATIVE_INFINITY;
		return - (length - empty) / empty;
	}