On the opposite, the orthodox Pawn introduction and its promotion looks poorly inspired for a so innovating game. The Probe used in Tournoy, already existing in Ploy, make a Pawn much more accorded to the game. Here, the Hammer is a novelty for this category of game. Indeed, a jumper was missing. Last not the least, exceptions have been avoided, improving the homogeneity of move between pieces.
Detailed rules follow.
The pieces are tokens bearing their allowed directions on the top face. It is the only one able to move on 4 directions, but it is limited to one case step only. On the initial arrangement, the Cross is set diagonally. Note that a Cross may checkmate the opposite Cross without assistance. At the beginning, the central direction is oriented straight ahead.