 In the second, Spassky surprised Fischer with a and won the game after Fischer defended poorly, allowing Spassky to trap Fischer's queen and handing Fischer his only loss in the poisoned pawn variation.The line was later taken up successfully by other leading players, including World Champions Garry Kasparov, Viswanathan Anand, and Anatoly Karpov.It remains one of the most theoretically important variations of the Sicilian Defense.