context: 1. e2e4  1... e7e5  2. f1c4  2... g8f6  3. d2d3  3... c7c6  4. g1f3  4... d7d5  5. c4b3  5... a7a5  6. a2a4  6... f8b4  7. c2c3  7... b4d6  8. e4d5  8... c6d5  9. c1g5  9... c8e6  10. b1a3 This is the idea behind ​​White's play. The knight finds a good square on b5. 10... b8c6  11. a3b5  11... d6b8 Keeping the bishop is important because it protects the center. Eventually, Black can develop the rook on a6. 12. d1e2 An ambitious idea that Rapport has already tried in a blitz game. White prepares to castle queenside. 12... e8g8  13. e1c1  13... f8e8 