Forcing Black to block his dark-squared  bishop.
1. e2e4  1... c7c5  2. a2a3 When qualified, why not try something original? This line  was heavily analyzed and popularized by the Russian GM Alexei Bezgodov,  who even wrote a book about it. 2... g7g6  3. f1c4  3... f8g7  4. h2h4  4... e7e6  5. b1c3  5... g8e7  6. h4h5 Already a novelty! 6... d7d5 A classical approach by a great classical player. 7. c4a2  7... d5d4  8. c3e2  8... d4d3 It is a good moment to generate central counterplay while the  opponent is pushing his side pawns. 9. c2d3  9... d8d3  10. g1f3 An  interesting pawn sacrifice. 10... b8c6 Which Gelfand correctly rejects. 11. a2b1  11... d3d6  12. d2d3  12... b7b6 