1. e2e4  1... e7e5  2. g1f3  2... g8f6 One of the questions that made me curious before the start of the tournament (and I'm certainly not the only one) is what the players would try against Nepomniachtchi's unbeatable Petroff, which has served him so well since the last Candidates Tournament. This game is a good answer. 3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. d2d4  5... d6d5  6. f1d3  6... f8d6 In modern popularity, the bishop development on d6 has surpassed the move 6...Nc6, which was the main weapon more or less 20 years ago. 7. e1g1 