1. Everyone starts with one tile in a corner, marked with their emblem.
2. On your turn pick a colour touching your territory. Your whole territory turns that colour and swallows every touching tile of it.
3. You can never take a rival's land, and you can't pick the colour of a rival you're touching. Where territories meet, the border is fixed.
4. A player with no open tiles left beside them is surrounded and out of moves.
5. When the board is claimed, the biggest territory wins.

Tip: tap a colour button or a tile on the board. Keys 1–7 work too.