Children’s Games by Pieter Bruegel – 2000 Piece Jigsaw Puzzle (Pomegranate)

Pieter Bruegel the Elder painted this town square in 1560 and packed more than two hundred children into it: hoops rolling, leapfrog, piggyback, a barrel being ridden, knucklebones thrown in the dust, blind man's buff, a swarm of them clambering over a red fence, and more wading in the stream at the top left. The buildings are pale stone and red brick; nearly everything else is the warm ochre of bare ground.

That ground is the difficulty — a vast field of near-identical dusty brown with the action scattered across it in small clumps, so the way through is outward from the figures rather than inward from the edges.