Logic Masters Deutschland e.V.

Followed up by Hidden Meta Tic-tac-toe

Rules:

Normal Sudoku rules apply.

A valid game of meta tic-tac-toe was played on the Sudoku grid, until the position indicated by the Xs and Os was reached.

For each move after the first, the digit in the cell of that move is the box number of the previous move.

Explanation of meta tic-tac-toe:
- First player is X, and plays in any of the 81 cells.
- When a player plays in position P of box B, the next player must play in box P (and, by the rule above, write B in the cell where they play). For example, if X plays in row 6 column 2, this is position 8 of box 4, so O must then play in box 8, and write 4 in the cell where they play).
- A box is won by a player when they are the first to align 3 of their symbols in that box (diagonals count).
- The game is won by a player (and ends immediately) when they are the first to align 3 of their won boxes (diagonals count).
- If a player is instructed to play in a box that is already full, they immediately lose the game.

Play in Sudokupad

Hope you enjoy it !