|Knight Mate Chess|
|Cheshire Cat Chess|
|Upside Down Chess|
|Fog of War Chess|
|Line 4 Tetris|
|Spiderline 4 Tetris|
|Dragon Eggs Hunt|
|Lines of Action (LOA)|
Zen LOA is a special version of LOA.
The initial setup s shown on the igure below
1. At his turn, a player can move on of his piece, or the special 'Zen' piece.
2. When a player moves the 'Zen' piece, the other player may nor replace this piece on the square where it came from during the previous move.
3. The 'Zen' piece can be friend or ennemy, at the player's convenience. It means it can be captured or it can be jumped over.
4. To win, a player must have all his pieces connected, the 'Zen' piece included, if it stills exists.