Logic games for a satisfying deduction
A good logic puzzle gives you a reason for your next move. You might rule a digit out of a Sudoku row, use two numbers to locate a mine, or keep a path from cutting off an empty square. These games reward noticing what the board already tells you.
Start with the kind of decision you enjoy. Sudoku is about placing numbers without repetition. Mines is about comparing neighbouring clues. Dino Trail turns the whole board into a single route. Each plays in a phone or desktop browser, and you can start as a guest.
Choose a game
The full 9×9 puzzle, with keyboard controls and pencil notes. Use rows, columns and 3×3 boxes together to narrow each choice. Medium is the ranked level; Easy and Hard let you practise at a different pace.
A 6×6 grid with 2×3 boxes makes each deduction easier to inspect. It is a useful place to practise scanning one digit at a time before returning to the larger board.
Compare the numbers along an uncovered edge, subtract flags you can justify and open the squares those clues prove safe. Every dealt board is checked to be solvable without guessing.
Draw one continuous trail through all the squares, passing numbered nests in order. Look ahead before sealing off a corner: a locally valid step can leave the rest of the grid unreachable.
Which game fits your mood?
Choose Mini Sudoku when you want fewer cells to keep track of: its 6×6 grid uses the digits 1 to 6. Choose classic Sudoku when you want the full 9×9 board and room to work with pencil notes. Neither puzzle needs arithmetic.
Choose Mines when you like proving that a square is safe before opening it. Our boards are checked by a deduction solver before they are dealt. Choose Dino Trail when you prefer drawing a route to entering numbers: you must visit every square exactly once and reach the numbered nests in order.
Learning a technique and racing a clock are different goals. Practise carefully first, then try the monthly boards when you want a target. Guests can play; sign in if you want eligible results to appear on a leaderboard. Each game explains which level or mode is ranked.
Learn a useful technique
- Sudoku strategies: from the first scan to pairs and pointing
Scanning, singles, pairs, pointing and the X-Wing: the Sudoku techniques that solve most puzzles, with worked examples and pencil notes.
- Minesweeper patterns: how to clear a board without guessing
The 1-1, 1-2, 1-2-1 and 2-1-2 patterns with diagrams, chording and end-game counting: how to read Minesweeper numbers and clear every board.