Powerplay is played on a 4x4 game board. Each player has 4 round-shaped and 4 square-shaped tokens numbered from 1 to 4. The tokens have two sides, one of them with a black frame. On a turn, a player places one of their tokens on a free space on the game board. When all spaces have been occupied, it's time to check the effects of each token on the opponent's neighboring tokens. The square tokens work horizontally and vertically whereas the round tokens work diagonally. A token is considered conquered if the score of the pieces surrounding it is higher than its own value. It is then turned onto its black framed side. The winner is the player with the most points (i.e., a higher difference between the points of the pieces they conquered and the points of your pieces conquered by the opponent).
Originally published in spielbox 1991 #6.