Logic games.
One move at a time.
Play free puzzles in your browser. Work out the clues, plan your next move, and explore patterns.
No downloadNo accountFree to play
Find your first puzzle
Start with clues, try planning a route, or experiment with a changing board.
Nonograms
Work out which cells can be filled from the number clues.
Explained moves · Six practice puzzlesPlay Nonograms ↗
Sokoban
Plan your pushes and get every box onto a target.
Unlimited undoPlay Sokoban ↗
Lights Out
Explore how one press changes neighbouring lights.
Worked strategy examplePlay Lights Out ↗Understand a move
Try a worked example, then take the idea to the board.
Read a Nonogram clue
See how numbers describe a row, and when overlapping possibilities reveal a certain cell.
Learn the rules with pictures ↗Follow a Lights Out pattern
Work through a 4×4 example row by row, and see why a single pass does not always finish the puzzle.
See the worked example ↗Make room for a little logic
Each puzzle gives you a different way to think: what can the clues prove, which move leaves room for the next, or how does the board change?
Pick a game, try an idea, and see what happens. Rules and examples are there when you want a hand.
Your own puzzle notebook
Keep track of stamps and records across the collection. Progress stays in this browser; no account is needed.
Open My Notebook ↗