Max is given a `3 xx 3` chessboard. Max is asked to place 2 black rooks, 2 white knights and 1 white bishop on this board in such a way that: a. each piece threatens one or more pieces of the opponent b. each piece is protected by another piece of its own colour c. each piece (except the black queen is under attack by some opponent piece
Let the pieces be assigned numbers as follows: Queen=9, Knight=3, Bishop=3, Rook=5 on black squares and respective negative values on white squares. Find out the ‘sum’ of all pieces in the arranged position.

Explanation