Hut ab! is a small abstract game for two players, and it a bit of a shell game. Players play 5 stones of their color on the 4x4 grid, with the goal to line up four of their color. The players also each have three hats of their color they can use to play onto the board, to cover stones. On a player's turn, they either add a stone or hat to the board, or move a stone or hat on the board. When they think they have four of their stones lined up, they remove the hats. If they did not have their stones lined up, they lose.