Hardest Sudoku

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SE grade 6.7 Sudoku

6.7SE grade · 22 clues

By The Hardest Sudoku Team · Last updated

Givens only — solution not shown.

About this puzzle

An SE grade 6.7 Sudoku with 22 clues — hard, leaning on X-Wings and steady candidate elimination.

The SE grade is the canonical difficulty number from Sudoku Explainer — read how it works on the SE grade page.

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