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deduce
A logic grid with a handful of clues. No guessing is required and none is rewarded — every puzzle is checked by a solver to confirm the clues narrow it to a single valid arrangement.
How a round plays
The clues leave exactly one answer.
- Read the clues and eliminate what they rule out.
- Tap cells to cycle through the possible values.
- Fill the grid completely to submit it.
Scoring and fairness
What the grade is measuring.
The ◆ grade. Whether the completed grid is correct, and how long it took.
Hints.Fills one cell with its correct value. Using one keeps you off the ranked board for that day, so a hint can rescue a round but never buy a rank.
How the result is proved.Server-graded answer. Every one of the ten games is verified server-side in one of three ways — a replayed move log, a server-graded answer, or per-guess checks that end in a signed win token — so the leaderboard only counts results the server could reconstruct for itself.
- Verification: Server-graded answer
- Puzzle source: Procedural
- Typical round: 4–8 min
Where it comes from
A new one, every night.
Tomorrow's deduce already exists. It was generated from a date seed, checked by a solver, and put in a queue that runs weeks ahead of today — so nothing ships the night it was made, and a bad batch never reaches a player.