Copyright (c) 2003 Robert A. Kraus

The game is played on a 8x8 square board with the following setup: 


TURN - On each turn, each player slides (orthogonally or diagonally) a stone until it hits another stone or a wall.

If it stops because of a stone, the moving stone and all adjacent stones (of either color) are removed.

GOAL - The player with no stones onboard loses.

The game is a draw if (i) the board becomes empty, or (ii) each player has just one stone, or (iii) the moving player has no valid moves.

Some examples

This is a typical position after two turns. If the white stone at a2 slides to cell [1] it will be removed together with all the marked stones.

If f3 slides to h1, there is no piece removed, since the moving stone stopped because of a wall.

There is a ZRF to play Fission with Zillions.