1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. d2d4  3... c5d4  4. f3d4  4... g8f6  5. b1c3  5... a7a6  6. d1d3 A very rare  line, also played by Carlsen against Grandelius in this tournament. It has recently been tested by Fedoseev, and before that it was brought briefly  into the spotlight by the creative Spanish GM Vallejo. It should be  mentioned that the Dutch GM had tested it in the distant 2014. 6... b8d7  7. f1e2  7... b7b5  8. a2a4 White gambits a pawn and after some hesitation... 8... d7c5 Grandelius accepts the challenge. From here on, the players  enter uncharted territory, or at least Black does. Van Foreest keeps  practically blitzing his next moves. 9. d3e3  9... b5b4  10. c3d5  10... c5e4  11. a4a5 The point. White fixes the b6-square,  as well as we shall see later, the pawn on a6. 11... f6d5  12. e3e4 