Be the first to align 4 pebbles of your color, either in a row or diagonally.
Each player starts with 8 pebbles of their color in their hand, while there are 8 neutral pebbles on the initial board.
On your turn, you must add a pebble from your hand to the top of an already-existing stack on the board. (Note: a single pebble on the board counts as a stack)
Then, you must take that stack of pebbles and replace them on the board:
- you must place first the pebble that was at the bottom of the stack, then the following ones in ascending order.
- the first pebble must be placed on an adjacent spot to the position of the stack. The next ones must be placed orthogonally adjacent to the previous spot.
- you cannot move directly back to the spot you just came from. However, you can circle back to it if you have enough pebbles.
You win if you make a line of 4 of your pebbles, either in a row or in a diagonal. Only the topmost pebbles of stacks count for the victory condition.
If both players have placed their 8th pebble without triggering a win, the game ends in a tie.