The series includes two main volumes, with the second volume introducing more complex challenges for intermediate students.
By tracking a piece 8 or more moves deep, players improve their "mind's eye" for the board, far exceeding the typical 2-move foresight of beginners.
is a highly regarded puzzle book by American Master Bruce Albertson designed to bridge the gap between standard tactical training and pure visualization.
: Continues the progressive difficulty with hundreds of additional mazes.