context: 1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6  6. d4b3 The ultimate prophylactic move. White takes the knight out before the thematic e7-e5, which is fundamentally Black's plan after a7-a6. The move is still possible, but it's a bit discouraging to play it when your opponent has already taken the knight out of d4. 6... e7e6 Probably the most logical move, leading to a Scheveningen pawn structure. Kasparov would certainly approve. 7. g2g4 