Abstract

1. Take turns to place a piece aligned to the grid.
2. Do not cover any of your own colour
3. Do not cover a whole area of another colour. (An area is a single colour conected at edges, not corners. )
4. The game ends when no piece can be played.
5. The winner is the player with most squares showing their colour.
6. (Computer version special - legal moves will flash a different colour to illegal ones)