Complete the grid so that each of the nine 3x3 squares, and each 3x3 square formed from cells of the same colour, contain a drawn game of noughts and crosses (no row, column or diagonal contains three noughts or three crosses).
Fill ALL empty cells with uppercase letters O and X.
Solution code: row six
on 26. June 2025, 15:30 by AlfSmith
Penpa+ puzzle updated.
on 25. June 2025, 18:45 by AlfSmith
Rules clarified.
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