First set the initial number of stones in each pile or accept the randomly chosen numbers. Each initial pile should have no more than one billion stones or the computer may get hung up. Initial piles may also have zero stones. When the initial piles are satisfactory hit 'submit move' and the computer will take a turn. Then enter your turn in the text fields, according to the game rules, and hit 'submit move' when you are ready. Repeat taking turns until somebody takes the last stone.