Daily logic puzzles that sharpen your reasoning.
Follow the clues to deduce every Suspect and Innocent. No luck — every deduction is backed by logic. Remember: everyone tells the truth!
How To Play
Three steps. Pure logic. Find every Suspect and Innocent.
Read the Clues
Each character on the grid may carry a clue — counting constraints, adjacency rules, or row/column facts.
Deduce, Step by Step
Use elimination, counting, and contradiction to narrow down every cell. No guessing needed — every step is logically certain.
Identify Everyone
Deduce whether each character is a Suspect or Innocent. Pure logic — no guessing!
Built for Real Reasoning
Not a brain training gimmick. A genuine logic workout.
No Guessing Required
Every puzzle has exactly one solution, reachable through pure deduction. If you're guessing, there's a clue you haven't fully used yet.
Hints That Teach
Stuck? Our 3-stage hint system shows you the next logical step: which clue to focus on, what it constrains, and why.
Evidence Analysis
Verify the people referenced by hints, and trace the full chain of logical consequences. See exactly why an assumption leads to a contradiction — or why it must be true.
Streaks & Stats
Build a daily streak. Track your solve times across grid sizes. Watch your deductive reasoning sharpen over weeks of practice.
Learn & Improve
Guides and strategies to level up your reasoning.
Griductive vs. Sudoku: Two Different Theories of What a Logic Puzzle Is
A deep look at Sudoku and Griductive — two logic puzzle games built on fundamentally different design philosophies. What makes each one tick, and what it feels like to play them.
2026-03-25
Griductive vs. Clue Master: Which Deduction Game Is Worth Your Time?
A detailed comparison of Griductive and Clue Master — two logic puzzle deduction games. Discover the gameplay differences, puzzle quality, features, and which one delivers a more satisfying experience.
2026-03-24
How Griductive Puzzles Are Made
A behind-the-scenes look at how Griductive generates puzzles using constraint satisfaction, and why every puzzle is mathematically guaranteed to have exactly one solution.
2026-03-23