use, the Poisoned Pawn became a respected line played by many of the world's leading players. [ 345 ] On the white side of the Sicilian , Fischer made advances to the theory of the line beginning 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 (or e6) 6.Bc4, [