1. e2e4  1... e7e5  2. g1f3  2... g8f6  3. f3e5  3... d7d6  4. e5f3  4... f6e4  5. d2d4  5... d6d5  6. f1d3  6... f8e7 6...Bd6 is the favorite move of Nepomniachtchi, the biggest specialist in the Petroff Defense today. For this reason, the move has become very popular. But there's nothing wrong with the development of the bishop on e7. 7. e1g1  7... c8f5  8. f1e1  8... e8g8  9. c2c4  9... b8c6 [%c_effect c6;square;c6;type;GreatFind;persistent;true] This is more accurate than 9...c6. 10. c4d5  10... d8d5  11. b1c3  11... e4c3  12. b2c3  12... f5d3  13. d1d3 With the Petroff Defense, it's always the same thing: White gets a slightly better position, but Black manages to equalize with precise play and is close to a draw. It's not the most exciting prospect for most games, but for those who don't mind that, there isn't a better weapon. 13... a8e8  14. c1f4  14... e7d6  15. c3c4  15... d5h5 