Interlocking
How a Burr Key Piece Works
See how one constrained bar can hold an entire interlocking structure together.
Open sectionInside the puzzle
Animated explainers show how key pieces, sliding panels and disentanglement moves create apparently impossible challenges.
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See how one constrained bar can hold an entire interlocking structure together.
Open sectionFollow a simplified sequence in which panels expose a pin and free a drawer.
Open sectionUnderstand why changing the route of a loop can release a ring without bending or opening it.
Open sectionThe animations show generic principles and do not reproduce a commercial mechanism or complete solution.