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Sudoku-Duo

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About Sudoku-Duo

Sudoku-Duo is a Sudoku variant played on a 9×9 grid. You fill the blank squares with nine different icons, ensuring that each row, column and block contains nine different icons.

Click a blank square and select an icon to place in it. Check for duplicates in each row, column and block; the challenge is complete when every cell is filled and the conditions are met.

Frequently asked questions

Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.

Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.

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