Grandelius decided to build a Hedgehog set-up.
1. e2e4  1... c7c5  2. g1f3  2... d7d6  3. f1b5  3... b8d7  4. a2a4 A relatively rare continuation,  which has been tested by the world champion. Another player who deserves  credit is the Dutch number one, Anish Giri. 4... e7e6  5. b1c3  5... a7a6  6. b5e2 