The four-day event in Valladolid in Spain gathers 3,500 of the best puzzlers, working individually or in teams, for the chance to be crowned champion.
For many people, jigsaws are a relaxing low-energy pastime, but at the World Jigsaw Championships competitors are speed building for trophies. The four-day event gathers 3,500 of the best puzzlers, ...
Embracing everything from riddles and logical conundrums to mathematical problems and optical illusions, he notes that "it ...