Four

A game inspired by the Four Colour Theorem in which four shapes in four colours are placed in a virtual grid according to four constraints. Players take turns putting pieces on the board, according to the following constraints:

Connected: after the first piece, each piece you play must touch at least one other piece orthogonally.

Different move: you may not play the same shape or colour that your opponent just played.

Not adjacent: you may not place a piece adjacent to a piece of the same shape or colour.

Virtual grid: you may not play so that the playing area exceeds 9 squares in any direction.

The last player able to place a piece wins.