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Sudoku69

Free classic, killer and 16x16 sudoku, rated by technique

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Sudoku69 is a free sudoku site with three modes: classic 9x9, 16x16 and killer. Every puzzle is rated by a human-style solver, so the six levels follow the techniques you actually need, not just the number of givens. New daily puzzles for each mode, printable sheets, pencil marks and hints, light, sepia and dark themes, and 38 languages. Installable as an app, no account needed.

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PH · launched Oct 31, 2026 · 1 upvote (top 67%)

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Could you build this?

Yes Sudoku generation and solving are well-known algorithms. Grading by human techniques is harder but can be built by implementing a set of named solving strategies, and the rest is UI and printing.

Competitors

Other products that read as similar to this one : 248 launches clear the similarity bar, closest 8 shown.

Attention rank: #98 of 249 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 367 days after the earliest competitor.

Other launches for this product