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Hard · Puzzle #550
8
9
8
7
3
1
5
7
6
8
9
5
1
7
2
7
1
8
6
3
5
7
8
5
6
3
9
7
6
3
5
In 2007, a British newspaper published a Sudoku with no unique solution — they had to issue an apology.
In 2007, a British newspaper published a Sudoku with no unique solution — they had to issue an apology.
Set a personal best time today. Write it down. Tomorrow, try to beat it by one second.
Set a personal best time today. Write it down. Tomorrow, try to beat it by one second.