Chess Enterprises, Pennsylvania, USA, 1999, paperback, 82 pp, 135 grams, very fine condition.

C. Alexander has developed a set of tools which make it very precise and quick to determine the required number of moves, and whether or not a sequence of knight moves will achieve a goal. The author has developed a wonderful set of graphs which visualize the possibilities of moving a knight to a desired goal. Many players will find this technique to be invaluable in winning endgames involving the knight, or even combinations in the course of the middlegame.