[%c_effect c3;square;c3;type;GreatFind;persistent;true] Freeing the c4-square for the knight.
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... g8f6  4. d2d3  4... f8c5  5. e1g1  5... d7d6  6. c2c3  6... a7a5  7. c4b3  7... e8g8  8. f1e1  8... c5a7  9. h2h3 The move orders in the Italian Opening are very subtle. The important point here is to note that White doesn't develop the knight on d2 too early: the idea is to be ready to play d4 quickly. 9... c8e6  10. b3c2  10... h7h6  11. d3d4 [%c_effect d4;square;d4;type;GreatFind;persistent;true] This has the advantage of not developing the knight on d2 so soon. White is ready to play d4 as the pawn is protected. 11... e5d4  12. f3d4 [%c_effect d4;square;d4;type;GreatFind;persistent;true] As usual in the match, Lei displays excellent opening preparation. This is an important moment in the game. 12... e6d7 [%c_effect d7;square;d7;type;Inaccuracy;persistent;true] This is not in the spirit of the position. A more dynamic move is required. 13. c1e3 White is ready to develop the knight on d2 with a better position. 13... c6e5 A new move, preparing to attack the strong knight on d4. 14. b1d2  14... c7c5  15. d4f3  15... d7c6  16. f3e5 [%c_effect e5;square;e5;type;GreatFind;persistent;true] 16... d6e5  17. a2a4 [%c_effect a4;square;a4;type;GreatFind;persistent;true] White has a clear positional advantage now due to the better pawn structure. 17... d8e7  18. d1e2  18... f8d8  19. e1d1  19... a7b8  20. e2c4 [%c_effect c4;square;c4;type;Interesting;persistent;true] An unconventional move. The queen, not the knight, goes to c4. 20... b7b6  21. b2b4 [%c_effect b4;square;b4;type;GreatFind;persistent;true] 21... a5b4 [%c_effect b4;square;b4;type;Inaccuracy;persistent;true] It's better to keep the queenside closed. 22. c3b4  22... b8d6  23. b4b5  23... c6d7 