1. c2c4  1... c7c6  2. g1f3  2... d7d5  3. e2e3  3... g8f6  4. b1c3  4... g7g6  5. d2d4  5... f8g7  6. f1e2  6... e8g8  7. e1g1  7... f6e4 A  relatively rare move. Far more popular alternatives in the Schlechter line are: 8. c3e4  8... d5e4  9. f3d2  9... c6c5 The logical followup that justifies the  knight's jump in the center turns out to be a novelty. 10. d4c5  10... f7f5  11. a1b1  11... a7a5  12. a2a3  12... a5a4  13. b2b4  13... a4b3  14. d2b3  14... d8d1  15. f1d1 All  these moves seem quite logical. It is obvious that the extra white pawn  will not survive for long. The question is, Will Duda make something out  of its energy? 15... b8d7  16. g1f1  16... h7h5  17. c1d2  17... a8a3  18. b3a5  18... d7c5 Not the  most accurate solution, at least according to the computer. 19. d2b4 With another forcing sequence Duda manages to tie down the enemy  pieces. 19... a3a2  20. b4c5  20... a2a5  21. c5e7  21... f8f7 