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. In recent times, the line has become a popular battleground in computer chess, with operators trying to "out-book" each other by going progressively deeper into the different poisoned pawn lines. As a result, the line is extremely well researched. Writing in 2010, FM Graham Burgess commented that current theory suggests that the b2 pawn is "not too heavily laced with arsenic", but it would be suicidal to enter the line without specialist knowledge.