Tác Giả: Jon Dunkelman
Nhà Phát Hành: Orca Games Ltd, Quantum Games Ltd (I)
2-player abstract based on a medieval game called Rithmomachy. A long checkerboard has opposing pieces moving forward and attacking according to the shape and number on the pieces. The pieces are circles, triangles and squares and the numbers run from 2 to 90. Using different rules of position and math, captured pieces are removed.