Emergo can be played on the black squares of a 9×9 checkered board (with black squares in the corners) using two sets of 12 stackable checkers. There are two phases to the game, placement and move & capture. During placement, each player takes turns placing one piece on the board, unless a capture is available, which immediately takes precedence. Pieces may not be placed such that they force an immediate capture unless there is already a capture threat elsewhere or there is no choice but to place a piece in jeopardy. The last player places all of his/her remaining pieces on the board at once in one tall "shadow" piece. Players control stacks when their piece is on top. In the movement & capture phase, players move one piece one square at a time to the next square (only on the black squares -- connectivity is four) or capture (mandatory when possible) the top piece of a stack under the bottom of another stack by jumping over it. Jumps can be repeated, and maximal captures are mandatory. The first player unable to move loses.