Ultimate Tic-Tac-Toe: Quick Rules
Grid: Played on an N x N global grid (e.g., 3x3, 4x4, up to 5x5). Each cell of this global grid is a smaller, independent N x N "local board".
Goal: Win N local boards in a row (horizontally, vertically, or diagonally) on the global grid.
Gameplay Mechanics:
- Players alternate turns placing their mark (X or O).
- Winning a local board claims that corresponding cell on the global grid for that player.
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The "Send" Rule: The specific cell (e.g., top-left) where you play within a local board dictates which local board (e.g., the top-left local board) your opponent must play in on their next turn.
Special Conditions:
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Sent to a Decided/Full Board: If the local board you are "sent" to is already won or completely full (a draw), you can then play your mark in any other available cell on any other local board that is not yet decided.
- The first move of the game is a free choice anywhere.
- A local board can end in a draw. The overall game can also end in a draw if no valid moves remain.