Draw on the board with your mouse or finger. Dragging from a cell of your own color erases.
Keyboard
Classic rules
A live cell with 2 or 3 live neighbours survives.
A dead cell with exactly 3 live neighbours comes alive.
Every other cell dies or stays empty.
War rules
Same life-and-death rules, but every cell belongs to a faction.
A newborn cell joins the faction most of its 3 parents belong to (ties are random).
Conquest: a surviving cell with more neighbours from one enemy faction than from its own switches sides.
The last faction standing wins.