[%c_effect g5;square;g5;type;GreatFind;persistent;true]
1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... g8f6 There are many ways to face the Berlin Defense, probably the most reliable variation for Black, along with the Petroff. It's possible to choose a long-term strategic game with 4.d3 to fight in the endgame like how Kasparov got so much headache in his match with Kramnik or look for a computer line in which your opponent needs to remember many moves to make a draw. Firouzja chooses the last option. 4. e1g1  4... f6e4  5. f1e1  5... e4d6  6. f3e5  6... f8e7  7. b5f1  7... c6e5  8. e1e5  8... e8g8  9. d2d4  9... e7f6  10. e5e1  10... f8e8  11. c1f4  11... e8e1  12. d1e1  12... d6e8  13. b1c3 [%c_effect c3;square;c3;type;Interesting;persistent;true] An interesting pawn sacrifice that is regarded as equal by opening theory with some long forcing lines. 13... f6d4 The best way to refute a sacrifice is by accepting it, as the saying goes. 14. c3d5  14... d7d6 