Each player obtains 8 pebbles in their color. The third color is neutral, and these pebbles are placed in the 4 corners of the board. On their turn, players add a pebble to the top of a stack of their choice before moving it. When moving a pile, players have to leave one pebble on each space crossed. The first player lining up 4 pebbles of their color from top view wins the game