1. In Christ
    30 Apr '07
    29 Feb '08 20:071 edit
    Place knights, bishops, and at least one queen on a chess board such that no piece is on a square threatened by another piece. Try to maximize the expression NB/Q.

    N = number of knights
    B = number of bishops
    Q = number of queens

    I'll be working on this along with the rest of you, since I don't know for sure the maximum value. A quick attempt of mine gave a value of 45.

    EDIT: New solution gives 48