These are clearly chess moves, but if you try to follow them from the beginning, not only do you need to have pieces already in some unknown starting position, but you end up with white capturing his own rook with his knight in the move that wraps around to the second row.
Instead, set up the board in the starting configuration and start at the point part way into the 8th line of moves with d4 d5, which looks like the start of a real game.
| 1. | d4 | d5 |
| 2. | Na3 | Nc6 |
| 3. | c3 | Nf6 |
| 4. | Nb5 | g6 |
| 5. | Bh6 | e6 |
| 6. | b3 | a6 |
| 7. | Nd6 | Bxd6 |
| 8. | a4 | b6 |
| 9. | Rc1 | a5 |
Good so far. Some of the moves are bad chess, but they are legal moves, except for the Bd6 capture of a knight that was only indicated as a normal move. (All the captures for the entire game are treated this way, and check is not marked either, though the en passant capture is marked.)
But the next move is white Ng4, an impossible move since the the only knight he has left is on g1. The moves which follow work if this move is simply skipped.
| 10. | b4 | axb4 |
| 11. | Rb1 | Rg8 |
| 12. | e3 | Rxa4 |
| 13. | Qd3 | b3 |
| 14. | Be2 | g5 |
| 15. | Nf3 | g4 |
| 16. | Bg5 | Rxd4 |
| 17. | Qb5 | Bb4 |
| 18. | Qa4 | Ba5 |
| 19. | Qb5 | Rd3 |
| 20. | Qxd5 | Qd6 |
| 21. | Qb5 | Bd7 |
| 22. | Qa4 | Bxc3 |
| 23. | Kf1 | Bc8 |
After 24. Qa8, the next move Bd1 does not work. But again it can simply be skipped.
| 24. | Qa8 | e5 |
| 25. | Nxe5 | b5 |
| 26. | Rxb3 | Ke7 |
| 27. | Rb4 | Be6 |
| 28. | Nc4 | Qd4 |
| 29. | Nd6 | Bd5 |
| 30. | f3 | Nxb4 |
After 30. ... Ne4, both Nb4 and Qd5 are impossible. If Ne4 is skipped, the next few moves are possible.
| 31. | Qxd5 | Rd8 |
| 32. | Qc6 | Kf8 |
| 33. | Bd1 | Nfd5 |
Qb3 is impossible.
| 34. | Ne4 | Qe5 |
| 35. | h4 | gh3(ep) |
| 36. | g3 | Nf6 |
| 37. | Bh6 | Ke7 |
| 38. | Bb3 | Rg8 |
| 39. | Be6 | Rg6 |
| 40. | Nd6 | Kd8 |
| 41. | Qe4 | c6 |
| 42. | Bb3 | Nfd5 |
| 43. | Qc4 | f6 |
| 44. | Ne8 | Qe6 |
| 45. | Rxh3 | bxc4 |
| 46. | Nd6 | Nb6 |
| 47. | Ke2 | N4d5 |
| 48. | Bf8 | Kc7 |
| 49. | Rxh7+ | Qd7 |
Qe3 was not possible for black's 49th move only because of the check.
| 50. | Nb5+ | Kb7 |
| 51. | Bxc4 | Nb4 |
| 52. | Bc5 | N6d5 |
| 53. | Bd4 | Rg8 |
| 54. | Bxf6 | Qxh7 |
| 55. | Bb3 | Ra8 |
| 56. | Bd4 | Qh2+ |
| 57. | Kf1 | Ra1+ |
| 58. | Bd1 | Raxd1++ |
And this brings us back to where we started. So yes, it is a legal, though highly improbable chess game after these five moves are removed: Ng4 Bd1 Ne4 Qb3 Qe3. The final position is:
-- -- -- -- -- -- -- -- -- BK -- -- -- -- -- -- -- -- BP -- -- -- -- -- -- WN -- BN -- -- -- -- -- BN -- WB -- -- -- -- -- -- BB BR WP WP WP -- -- -- -- -- -- -- -- BQ -- -- -- BR -- WK -- --
Here is the set of moves, with the starting point and the 5 skipped moves marked.
