1. e2e4  1... e7e5  2. g1f3  2... g8f6 This should not come as surprise as Wang has the  Petroff in his repertoire. 3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. d2d4 This is not  Nepomniachtchi's most common way to fight the Petrov, but his statistic in this line are quite good. 5... d6d5 