1. e2e4  1... e7e5  2. b1c3 Armagedon games give this sensible  do-not-allow-the-Berlin option to White. 2... b8c6  3. g2g3 At the end of  the 1980s, the Russian GM Igor Glek made a name for this variation. The  constant success he had over-the-board with the line helped him make it  into the top 10 players in the world in his prime years. 3... f8c5  4. f1g2  4... g8f6  5. g1e2  5... d7d6  6. d2d3  6... a7a6  7. e1g1  7... c8e6  8. h2h3  8... h7h6 It is not obvious if this prophylaxis is needed. 9. g1h2 Dubov is ready for the key f2-f4 advance. 9... d6d5  10. e4d5  10... f6d5  11. f2f4 In time. 11... e5f4  12. g2d5 A fabulous novelty! It is reminiscent of the capture on d5 in the English opening after which the  black bishop gets trapped in the middle of the board. The trade of the  fianchettoed bishop is always a tough decision to make and players are  usually have very concrete reasons. How much of this did Dubov prepare at  home? 12... e6d5 And a losing mistake at once! 13. e2f4 The bishop is trapped in the middle of the board!