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SELECT // LEVEL
Pick a puzzle to load.
How far have you come?
Pick the rung that sounds like you, then fine-tune in 0.1 steps.
What's a Grade? →
Just learned the rules
Grade 1.2–2.2
I use pencil marks like a pro
Grade 2.3–3.1
I've read the sudoku wiki
Grade 3.2–4.9
Apps don't challenge me
Grade 5.0–6.4
I can draw chains
Grade 6.5–7.4
I know my way around a solver
Grade 7.5–8.7
Pick
Grade 7.9
start grade 7.9 →
Only the world's hardest is left
Grade 8.8–10.5
🐉
THE MONSTERS
Beyond the ladder (Grade >10.5) — the named, legendary puzzles. The boss tier. PERFECT = solved with no mistakes and no hints.
▸ 18 legends
💬 talk to the dev