Copyright (c) 2002 Joao Pedro Neto
This game is played on two empty 7x7 square boards.
- LIBERTY - A stone is free if it is orthogonally adjacent to an empty cell, or is adjacent to a friend stone with liberty.
- SWAP - A stone can swap its position to the same cell on the other board, if that cell is empty.
- PIE RULE - One player places 3 black stones and 2 white stones on some empty cells. The other player choose sides. White drops the next cell, then turns alternate.
- TURN - On each turn, each player must do one of the following things:
- Pass his turn;
- Swap a stone (removing all stones without liberty) and then drop a stone on an empty cell (removing all stones without liberty).
- Swapping is mandatory but dropping is not.
- If a player cannot swap one of his stones, then he can swap an opponent's stone.
- It is not valid to create a position where no swaps are possible.
- GOAL - The game ends when both players pass. Wins the player with more points.
- A stone counts as one point, and a cell inside the player's own territory counts also as one point (same as Chinese Go rules)
Black's move. The marked black stone has only one liberty (to its left; the cell on the other board does not count has one). Black swaps the marked stone to  and drop a stone at cell  capturing the white group.
As easily seen, this game is a mix of Go with a wonderful game, Alice Chess. Notice that the rules permit suicides, which can be useful when there is no better move left, and a drop is essential.