Hardest Sudoku

Public puzzle

SE grade 1.5 Sudoku

1.5SE grade · 28 clues

By The Hardest Sudoku Team · Last updated

Givens only — solution not shown.

About this puzzle

An SE grade 1.5 Sudoku with 28 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.

Play this difficulty →