Puzzle Mechanics
Learn the core rules and solving principles behind puzzles, including logical deduction, constraint satisfaction, region division, number placement, rotation, and sliding.
Cell Shading
Shade selected cells so the resulting pattern satisfies all clues and constraints.
Puzzles · 12
Constraint Satisfaction
Assign values or states while satisfying multiple interacting constraints.
Puzzles · 27
Logical Deduction
Derive required conclusions from rules and known facts without guessing.
Puzzles · 28
Number Placement
Place numbers into designated positions according to a fixed set of rules.
Puzzles · 8
Piece Arrangement
Arrange movable pieces into a required position, pattern, or silhouette.
Puzzles · 18