Madeira + Serviço (artesanato)

The Chuck puzzle was invented and patented by Edward Nelson in 1897.[18] His design was improved and developed by Ron Cook of the British company Pentangle Puzzles who designed other puzzles of the family.[19]


Typical Chuck pieces: a U-shaped piece and a key piece
The Chuck consists mostly of U-shaped stick pieces of various lengths, and some with an extra notch that are used as key pieces. For creating bigger Chuck puzzles (named Papa-chuck, Grandpapachuck and Great Grandpapachuck, by Cook) one would need to add longer pieces. The Chuck can also be regarded as an extension of a six-piece burr of very simple pieces called Baby-chuck, which is very easy to solve. Chuck pieces of different lengths can also be used to create asymmetric shapes, assembled according to the same principle as the original puzzle.