Copyright (c) 2000 Chris Huntoon

This game is played on an empty 13x15 square board:

MOVE - On each turn, each player drops a stone (or Rabbit) into an empty cell.
After the move, all empty cells (orthogonal) adjacent to all previous player's stones (i.e., all excluding the last dropped) are occupied by a new stone of that color. 
GOAL - The player that places the last stone, lose the game.
An example

This is the board position, after the third White move.

There is a ZRF to play Jack Rabbits with Zillions.