In each round of playing a tile, the denomination is "2" (with a probability of 90%) or "4" (with a probability of 10%)
By pressing the arrow, the player can throw off all the tiles of the playing field in one of 4 directions. If, when dropped, two tiles of the same denomination “bump” one onto the other, then they turn into one, the denomination of which is equal to the sum of the connected tiles. After each move, a new tile with a value of "2" or "4" appears on the free section of the field. If, when the button is pressed, the location of the tiles or their value does not change, then the move is not made.
If there are more than two tiles of the same denomination in one line or in one column, then when dropped, they begin to connect from the side they were directed to. For example, tiles (4, 4, 4) in the same row will turn into (8, 4) after moving to the left, and into (4, 8) after moving to the right.
For each connection, game points are increased by the face value of the resulting tile.
The game ends in defeat if after the next move it is impossible to take an action.