1. e2e4  1... e7e5  2. g1f3  2... g8f6 The Petroff has always been a reputable defense, but lately it's appearing more and more in elite games, having been GM Nepomniachtchi's main weapon in the 2022 Candidates Tournament. 3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. d2d4  5... d6d5  6. f1d3  6... f8d6  7. e1g1  7... e8g8  8. c2c4 