Tumbleweed

Tumbleweed is a two-player game. It is played on a hexhex board and a sufficient supply of stacked checkers. A stack can "see" a hex, when they are connected by a straight line, with no stacks in between. The players take turns placing stacks of their tokens on hexes that are seen by at least one friendly stack. The height of every newly-placed stack equals the number of your stacks that see the new stack. (boardgamegeek.com)