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Evil · Puzzle #524
9
2
8
6
8
1
7
1
5
8
7
5
1
4
6
7
2
5
2
1
3
8
5
4
X-Wing: if a digit appears in exactly two cells in two rows, and those cells share the same two columns, eliminate that digit from those columns elsewhere.
X-Wing: if a digit appears in exactly two cells in two rows, and those cells share the same two columns, eliminate that digit from those columns elsewhere.
At peak Sudoku popularity in 2006, over 600 different Sudoku books were published in a single year.
At peak Sudoku popularity in 2006, over 600 different Sudoku books were published in a single year.