Thirty houses, counted down the first row, back up the second and down the third. The strip beside the board is the week: ten throws, taken in order, and then again from the top.

A throw moves one counter exactly that many houses. One counter to a house, and none may pass two that stand together.

Every counter stops on the 26th house. The 27th is water: a counter that lands there goes back to the 15th. A counter leaves the board by the exact count.

If a counter can move, one must. A throw that none can use is left over, and the game is lost.