Stack Tac Toe is a clever variation of classic Tic Tac Toe, inspired by Otrio. With simple rules, fast-paced rounds, and a stackable game format, it's perfect for printing, storing, and taking on the go – thanks to its practical lid.

Number of Players
2 players

Objective
The goal is to align three same-colored rings (X or O) in a row – horizontally, vertically, or diagonally.

Game Variants

1. Classic Tic Tac Toe

• Played only on the lowest level of the board.
• No stacking or movement of pieces allowed.
• The first player to align three same-colored rings in a row wins.
• Recommended for beginners or children.

2. Simple Stack Tac Toe

• Played with a maximum of two levels.
• All players start on the lowest level.
• Once a player places a piece on the second level, they can no longer place pieces on the first.
• Only the topmost ring on each space counts.
• No movement or removal of pieces allowed.
• Recommended for beginners and casual players.

3. Stack Tac Toe (Free Stacking)

• Unlimited stacking across all levels is allowed.
• Players can place pieces on any level at any time.
• Only the topmost ring on each space counts.
•  No movement or removal of pieces is allowed.
• The game ends when a player aligns three of their top rings in a row or when no further moves are possible.
• For advanced players: more freedom, more strategy.

4. Stack Tac Toe Plus (With Movement)

• Follows the same rules as Free Stacking (Variant 3).
• Additionally: If a player has no remaining pieces,
  they may move one of their own topmost pieces to an empty or stackable space.
• Again, only the topmost ring on each space counts.
• For experts in perception and spatial thinking.