Tumbleweed is a two-player abstract game played with white and red stackable pieces on a hexagonal board, invented by Michał Zapała in 2020.  It belongs to the territory family of games such as Go, Yodd or Amazons.

• Board
• Terminology
• Objective
• Play
• External Links

Tumbleweed is played on a hexagonal board with 6, 8, 10 or 11 cells per side.

• A stack is one or more pieces of the same color placed on the same cell of the board.
• A stack is said to be "seen" from a cell, when they are on the same straight line with no other stacks in between.
• A cell is owned by a player if there is a player's stack placed on it.
• A cell is controlled by a player if it is empty and it "sees" more player's stacks than the opponent's. This is not a part of the original rules but a useful notion to help calculating the score at the end of the game without the need to fill the entire board with stacks.

The highlighteed empty cell "sees" two White pieces and one Red piece.
This cell is therefore "controlled" by the White player.

The objective of the game is to have more owned and controlled cells (in total) on the board than the opponent when both players pass.

At the beginning of the game the board is empty. One of the players puts a stack of two neutral (not belonging to either player) at the middle of the board and then puts one Red and one White piece on any empty cell. The other player decides what color they want to play: Red or White. The player with the Red pieces makes the first move.

The players take turns placing a stack of their pieces on some cell. The height of the newly placed stack is equal to the number of stacks of the same player "seen" from the selected cell. The selected cell must meet one of the following requirements:

• any empty cell that "sees" at least one stack of the player making the move;
• any occupied cell if the occupying stack (of either color) is smaller than the one to be placed. This works with both opponent or neutral stacks ("capturing"), or player's own stacks ("reinforcement").

• Tumbleweeed rules on BoardGameGeek. 
• boardgamegeek.com/filepage/233805 Opening Theory in Tumbleweed (manual on opening strategy)
• boardgamegeek.com/filepage/229062 Local Tactics in Tumbleweed (puzzle book)