With the  clear intention to capture on h6 sooner or later.
1. e2e4  1... e7e6 A surprise for Karjakin, who mainly expected the Sicilian or the solid 1...e5 move. 2. d2d3 Therefore, the Russian GM decided to surprise  his opponent in turn and avoid the long theoretical lines. Plus, this move is good, right? 2... d7d5  3. b1d2  3... g8f6  4. g1f3  4... f8e7  5. g2g3  5... a7a5 A possible  move order, but Shankland soon reverts to a main line. 6. f1g2  6... a5a4  7. a2a3  This pawn needs to be stopped. 7... c7c5  8. e1g1  8... b8c6  9. f1e1  9... e8g8  10. e4e5  10... f6d7  11. d2f1  11... b7b5  12. h2h4  12... c8b7  13. h4h5  13... h7h6 One of the possible ways to defend. Just like White has stopped the a-pawn, so does Black with the striker on the opposite wing. 14. c1f4  14... d8b6 Shankland has prepared for queenside expansion. However, his last  move shifted one more of his pieces away from the kingside, and White  immediately starts creating concrete threats.