Copyright (c) 1978 CBS Toys, Gabriel
This game is played on an empty 21x21 square board without the center cell:
In this smaller board, White must play his 3rd turn (the marked stones represent the second turn).
Continuing the previous example, Black would be surrounded if he was not able to jump (from g6 to g4). However, each player can only jump once and now White wins by dropping d3-g3. Black is in a dead-end and cannot jump anymore!
The original game may be played by 2-4 players, and to speed up game play, the designers have a button connected to a timer in the middle of the board (that has 9-volt battery is connected to). After a certain number of seconds, an alarm sounds and then the player must pay a penalty of losing 2 two-square pieces. The timer can be set to go either quickly and slowly.