Copyright (c) 1997 Peter Hartley
This game is played on an the following board (in fact, you can play it herein!):
In the applet, to help players, stacks that only need one more stone to explode are colored slightly lighter. This game is not adequate to play on a real board, because the chain reactions can be very long.
Red's turn. If he plays at the marked cell, the cell (already with 3 atoms) will reach a critical mass of 4 and will explode!
The explosion will create 98 (!) chain reactions and will evaporate all blue atoms from the board. So, Red wins!
There is also a ZRF to play Automaton, also known as Atomic with Zillions.