Catch is played on an 8x8 game board, with players taking turns placing rectangular pieces on the board to cover two of the spaces in the grid; one player places blocks horizontally, while the other places them vertically. If a player closes off an area that contains 1-3 spaces – whether by surrounding it with blocks alone or with some combination of blocks and the edge of the board – the player places marbles of his color in the area enclosed. Whoever captures the most area wins!