A new move.
1. e2e4  1... g8f6  2. e4e5  2... f6d5  3. d2d4  3... d7d6  4. g1f3  4... d6e5 One of the most solid options for Black in the Alekhine Defense. Both the alternatives, 4...Bg4 and 4...g6, were played in the iconic Spassky-Fischer match. 5. f3e5  5... c7c6 Bortnyk is an expert on this system, having played it dozens of times in online games. By the way, Carlsen has also played this a few times. 6. f1d3  6... b8d7  7. e1g1  7... d7e5  8. d4e5 Both players had already faced each other in this position but in a bullet game. Bortnyk chose 8...g6, but this time he plays a move that Carlsen knows well, since he played it in his teenage years. 8... d5b4  9. d3e4  9... d8d1  10. f1d1  10... g7g6 