1. d2d4  1... d7d5  2. c2c4  2... e7e6  3. g1f3  3... g8f6  4. b1c3  4... d5c4  5. d1a4 This is line would become the tabiya for the rapid portion of the match. 5... b8c6  6. a2a3  6... f8d6 After taking her breath and a supposedly quick consultation with her trainer's team, Lagno changes the plate. 7. g2g3 A novelty, which does not impress. 7... e8g8  8. f1g2  8... e6e5 [%c_effect e5;square;e5;type;GreatFind;persistent;true] Equalizing at once. 9. a4c4  9... e5d4  10. f3d4  10... c6e5  11. c4a4  11... d6c5 The lack of development should have flashed a warning signal to Tan. However, her reaction 12. c1e3 albeit obvious, turned out to be almost a decisive mistake $1 12... c8d7 [%c_effect d7;square;d7;type;GreatFind;persistent;true] Not just development, this is also a prophylaxis against the opponent's tactics $1 13. a4d1  13... f6g4 [%c_effect g4;square;g4;type;GreatFind;persistent;true] Now Black's attack is running like a snowball on a steep slope. 14. e3f4  14... e5g6  15. e2e3  15... g6f4  16. g3f4  16... d8h4 The black pieces are entering the play with ease, while the white king remains in the center. Both the f2- and e3-pawns are now under fire. 17. d1d2  17... c5d4  18. e3d4  18... f8e8  19. e1f1  19... d7f5 Same ease. Lagno has created the deadly threat Bf5-d3+ followed by Re8-e2 $1 20. a1e1 The e2-square is covered... 20... f5d3  21. f1g1  21... g4f2 [%c_effect f2;square;f2;type;Brilliant;persistent;true] But here is another problem $1 The e1-square is opened for the black pieces to infiltrate.