Logic & Reasoning
Deductive puzzles where the answer is fully determined by the rules — Sudoku, Mastermind, Tower of Hanoi, and friends.
Logic puzzles are pure: every well-formed instance has exactly one solution, and you find it by reasoning forward from constraints. This cluster covers classical puzzle families with progressive difficulty, plus the solving techniques that experienced players actually use.
Games in this category
Sudoku 4×4
A simplified 4×4 Sudoku for beginners learning the rules. Gentle introduction to constraint logic.
Sudoku 9×9
The classic 9×9 Sudoku with multiple difficulty levels. Pure deductive reasoning.
Mastermind
Break a hidden color code using feedback on your guesses. A classic code-breaking puzzle.
Tower of Hanoi
Move a stack of disks between three pegs following the rules. A foundational recursive-thinking puzzle.