Each player in turn moves a crab one space rightward to a vacant space,
or over other contiguous crabs in the spaces to its right into the vacant space just beyond the other crabs.
After moving, a crab may immediately move again if it lies in a column with an odd number of enemy crabs.
The crab may do this repeatedly in the same turn.
The first player to bring all nine of his crabs into the rightmost three columns (the beach) wins the game.