Numerical superiority in line; "to set up a Sumito". As soon as the marbles of a player are touching in inline-direction his opponent marbles, he may push them if he is in a Sumito position, meaning that he have the numerical superiority. There are 3 possible Sumitos: 3 vs 1 Sumito, 3 vs 2 Sumito, 2 vs 1 Sumito