Hardest Sudoku

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SE grade 1.7 Sudoku

1.7SE grade · 26 clues

By The Hardest Sudoku Team · Last updated

Givens only — solution not shown.

About this puzzle

An SE grade 1.7 Sudoku with 26 clues — solvable with singles alone, a gentle warm-up.

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

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