I found this game on a random scrap of paper lying on the ground. I'm not sure how strong the players are. How should I go about determining that by using a chess engine (say, the ones hosted by lichess.org)?
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[FEN ""]
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Nf6 6. Nc3 Nd4 7. Nxd4 exd4 8. Ne2 Nxe4 9. Nxd4 Be7 10. O-O O-O 11. Re1 Nf6 12. Nf5 Re8 13. d4 d5 14. Bg5 c6 15. Nxe7 Rxe7 16. Rxe7 Qxe7 17. Qd2 Bf5 18. Re1 Qd6 19. c3 Ng4 20. h3 Nf6 21. Bf4 Qd7 22. Bd1 g6 23. f3 Nh5 24. Bh2 Ng7 25. g4 Be6 26. Be5 a5