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Logic Puzzles
Read the clues, find the constraint, and make the one move that must be true. Each board is generated here, loads without an account and includes a real guide to the logic behind it.
Nonogram
Reveal a tiny picture, one certain square at a time.
Kakuro
Fit unique digits into crossing sums.
Killer Sudoku
Solve a number grid guided by cage totals.
Futoshiki
Balance a Latin square with greater-than clues.
Slitherlink
Draw one unbroken loop around a field of clues.
Logic Grid
Cross-reference clues until every match is certain.
Binairo
Two symbols, three rules, no guessing.
Suguru
Fill each block; never let equal numbers touch.
Light Up
Light every square without a bulb shining on another.
Bridges
Join every island into one connected map.
How to choose
Start with the kind of move you enjoy.
Nonograms reward visual overlap; Kakuro and Killer Sudoku use number combinations; Futoshiki and Suguru work through ordering and neighborhood constraints. Binairo is pure two-symbol pattern logic, Light Up tests line of sight, Bridges builds one connected network, and Slitherlink turns local edge clues into a global loop. The logic grid is the most verbal choice. Difficulty comes from the depth of deduction, not simply the size of the board.