In 1964 Springbok Editions issued Convergence as a 340-piece jigsaw that was touted as ""the world's most difficult puzzle."" With this 1,000-piece reemergence of Convergence, Pomegranate just about triples the challenge. Best of luck to all aspiring solvers! Convergence, 1952 by Jackson Pollock (American, 1912-1956).