Definition
A legal sequence of moves transforms a start state into a goal state, and each move changes the options that follow.
How to recognise this family
Look first at the objective and permitted movements, not only the outward shape. Typical examples include sliding blocks, the fifteen puzzle, tower of hanoi and twisty puzzles.
- What must the solver achieve?
- Are the pieces separate, interlocked or permanently connected?
- Does the challenge depend on an ordered sequence, physical dexterity or discovering a hidden release?
Common solving approaches
Establish the rules, inventory the pieces and record every state-changing move. Search for constrained components, repeated patterns, symmetry and actions that create additional freedom. Stop if force appears necessary.
Related Crafty Puzzles examples
Catalogue fields
Useful catalogue records include the primary class, sub-type, objective, piece count, material, movement type, designer or maker, date, dimensions, alternative names and solution status.