It comes out of the box looking like a handsome carved sculpture that earns its place alongside coffee table books and art objects. But a closer look reveals the truth: the Chelsea is actually a befuddling puzzle that’ll hook players of any age. It starts out with deceptive ease, as you disassemble the puzzle into 15 notched wooden pieces. Putting it back together, though, is anything but simple – testing your memory, motor skills and spatial awareness to put the interlocking pieces in their proper places. How many tries will it take you?