The Fairness Checker

Put any puzzle on trial. The verdict: solvable by humane logic — or not, and exactly where the logic runs out.

Today’s NYT puzzles checked automatically

Verdicts for The New York Times’ daily Sudoku, all three difficulties.

Put any puzzle on trial Premium · free during beta

Paste a puzzle from a newspaper, book, or another app — 81 characters, using 0 or “.” for blanks. Line breaks and punctuation are ignored.