public boolean isMoveValid(int fromRow, int fromColumn,
                               int toRow, int toColumn) {

        //out of bounds
        if (fromRow < 0 || fromRow > 7 || fromColumn < 0 || fromColumn > 7 ||
                toRow < 0 || toRow > 7 || toColumn < 0 || toColumn > 7)
            return false;

        //if piece you want to move is not there or you are grabbing and moving to the same color piece
        if (getPieceAt(fromRow, fromColumn) == PieceType.NONE ||
                getPieceAt(fromRow, fromColumn) == getPieceAt(toRow, toColumn))
            return false;
        if (getPlayerInTurn() == PlayerType.WHITE) {
            if ((fromRow - 1 == toRow && fromColumn + 0 == toColumn) ||
                    (fromRow - 1 == toRow && fromColumn - 1 == toColumn) ||
                    (fromRow - 1 == toRow && fromColumn + 1 == toColumn) ||
                    (fromRow + 1 != toRow)) {
                if (getPieceAt(toRow, toColumn) == PieceType.BLACK ||
                        getPieceAt(toRow, toColumn) == PieceType.NONE)
                    return true;
                else return false;
            } else return false;

        } else if (getPlayerInTurn() == PlayerType.BLACK) {
            if ((fromRow + 1 == toRow && fromColumn + 0 == toColumn) ||
                    (fromRow + 1 == toRow && fromColumn + 1 == toColumn) ||
                    (fromRow + 1 == toRow && fromColumn - 1 == toColumn)) {
                if (getPieceAt(toRow, toColumn) == PieceType.WHITE ||
                        getPieceAt(toRow, toColumn) == PieceType.NONE)
                    return true;
                else return false;
            } else return false;
        }

        return false;
    }