Players try to build stacks, at least five pieces high, with a piece of their own color on top.
Note: In the following, a single piece is also be referred as a "stack".
In each turn players have two options, one of which they must choose:
A player places a new piece of his own color on any empty space on the board.
A player chooses a stack and moves one or more pieces from there.
And, most important:
Note:
The stack at e4 may move three spaces onto the stack at b4 (because it is three pieces high). The stack at e1 cannot reach b4 because it is blocked by c3. Please note that b4 may not jump on e4!
The piece in the center (at c3) is within reach of all adjacent stacks because it is a stack of height one and each of the surrounding stacks is one step away.
If a player cannot enter a new piece they must move a stack. If no move is available, the player must pass. The game ends in a draw if both players pass in sequence.
When a player builds a stack of height 5 (or higher), this stack is removed from the board, the pieces are put back to the reserve and the player who owned the top piece of said stack, scores 1 point.
For a standard game only 1 point is needed to win, but players can agree upon any other number at the beginning of the game.