This game is based on the permissible moves of the chess Queen - i.e., along any vertical, horizontal, or diagonal. In this game, the Queen can only move to the left, down, and diagonally down to the left.
The object of the game is to place the Queen in the lower left-hand square, by alternating moves between you and the computer. The one to place the queen there wins.
The game is published as type-in source code in Basic Computer Games (Microcomputer Edition), ed. David H. Ahl with Steve North, Workman Publishing, New York, 1978 (ISBN 0-89480-052-3).
The BASIC source code listing is published in Microsoft BASIC 3.0; suggestions for conversion to a wide range of other BASIC implementations are provided.