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  12... e7e6  13. e1g1  13... c8d7 At last the Swedish GM decided to develop his bishop on the  other diagonal. 14. c1d2  14... f8e7  15. e2f3 Once that White finished his development, he is ready to challenge the enemy knight in the center. 15... e8g8 Standing  against the pin. 16. e4d3  16... d8b8  17. c2c4 All of this is very natural. White needs to open  files and diagonals in order to capitalize on his superior piece energy. 17... b4c3  18. b2c3  18... a8a7 Finally, after almost 20 powerful moves in  blitz mode, Van Foreest has his first deliberation. 19. f1b1 And plays again the best move. 19... b8c8  20. c3c4  20... d5f6 Probably now those of you who were following the game unarmed  (not biased by the computer assessments and not spoiled by their  suggestions) were thinking about a way to remove the Ra7 from that square. Something like Bd2-e3 made perfect sense following this logic. But the  young Dutchman has something else in mind. 21. d4b5 Definitely one of the star moves of this Tata Steel edition! 21... a6b5  22. c4b5 The passer are connected and, since they are so  nicely supported by all the white pieces, should be stopped as soon as  possible. 22... d7b5 The only way. 23. d3b5  23... f6d7  24. f3b7 That locks the black rook permanently. The game  is essentially over, but loads of tricks remain in the cards. 24... c8d8  25. a5a6  25... e7f6 Now White needs to find a way to annihilate the a7-rook. 26. d2a5  26... d8e8  27. a5c7 A nice maneuver, albeit somewhat complicated. 27... f6a1  28. b1a1  28... d6d5 Missing his chance. 29. c7d6  29... e8d8  30. a1c1  30... g7g6  31. h2h3 Air is essential for the white king. 31... f8e8  32. c1c7  32... d7f6  33. d6e5  33... f6e4  34. b5c6  34... e8f8  35. e5d4  35... d8b8  36. f2f3 Removing the knight from  attacking the c5-square and finishing the game in style. 36... a7a6  37. b7a6  37... b8b4  38. d4e5 