user-1: In a casual game I played, my opponent castled around the 80th move. I want to know what was the latest move in which a player has castled, in an official game. I don’t think that there is an entry for this on Krabbe’s record site.

user10380: This web page claims that "[the] latest castling was performed on move 48 in two games: Neshewat – Garrison, Detroit 1994 and Somogyi – Black, New York 2002."
According to https://www.chessgames.com, the first was Michigan Class A (1994), Detroit, MI USA, rd 2, Jan-15. That site gives that second game here with no tournament or match citation. These are actually both on Tim Krabbe's record page under the title "Latest castling" in the "Moves" section.
Game 1: Kingside Castling
[Title "Neshewat-Garrison, Detroit, 1994"]
[FEN ""]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Qa5+ 5. Bd2 Qb6 6. Nb3 Ne4 7. e3 Qf6 8. Qf3 Qxf3 9. gxf3 Nxd2 10. N1xd2 Nc6 11. a3 d6 12. Be2 g6 13. Rb1 a5 14. O-O a4 15. Nc1 Bf5 16. e4 Be6 17. Rd1 Bh6 18. Kg2 Nd4 19. Bd3 Ra5 20. Nf1 Rg5+ 21. Ng3 Nxf3 22. b4 Bg7 23. Be2 Nh4+ 24. Kh1 Bh3 25. f4 Bg2+ 26. Kg1 Bxe4 27. Nd3 Bd4+ 28. Kf1 Rxg3 29. hxg3 Nf5 30. Rdc1 Nxg3+ 31. Ke1 Be3 32. Rd1 Nf5 33. Rb2 Bd4 34. Ra2 Ne3 35. Rc1 Ng2+ 36. Kf1 Be3 37. Rc3 Bd4 38. Rc1 Be3 39. Rb1 Nxf4 40. Rd1  Ne6 41. Nf2 Bf5 42. Bd3 Nd4 43. Bxf5 Nxf5 44. Ke2 Bh6 45. Ne4 Bg7 46. c5 dxc5 47. Nxc5 Nd4+ 48. Kf2 O-O 49. Nxa4 e5 50. Nc5 Nb5 51. Rd7 b6 52. Rb7 Nc3 53. Rc2 e4 54. Rxb6 e3+ 55. Ke1 Rd8 56. Rc1 h5

Game 2: Queenside Castling
[Title "Somogyi-Black E., New York, 2002 "]
[FEN ""]

1. e4 g6 2. d4 Bg7 3. Nc3 b6 4. Nf3 Bb7 5. Bf4 Nf6 6. Bc4 Nc6 7. O-O Nxe4 8. Nxe4 d5 9. Bd3 dxe4 10. Bxe4 e6 11. c3 Qe7 12. Ne5 Bxe5 13. dxe5 Na5 14. Bd3 a6 15. Qg4 h5 16. Qg3 h4 17. Qe3 Qd7 18. f3 Nc6 19. Rad1 Ne7 20. Bg5 h3 21. g4 Nd5 22. Qf2 c5 23. a3 Qc7 24. c4 Ne7 25. Qg3 Nc6 26. Bf6 Rh7 27. Rf2 Nd4 28. Bf1 b5 29. b4 bxc4 30. Bxc4 Qc6 31. Rd3 a5 32. b5 Qd7 33. a4 Bd5 34. Rc3 Bxc4 35. Rxc4 Qd5 36. Rc1 Nb3 37. Re1 c4 38. f4 Nc5 39. Qa3 Qd4 40. Qf3 Qd5 41. Qxd5 exd5 42. Rd1 Ne4 43. Rc2 Nxf6 44. exf6 Rh4 45. g5 Rg4+ 46. Kh1 Rxf4 47. Re2+ Re4 48. Rde1 O-O-O 49. Rxe4 dxe4 50. Kg1 Kb7 51. Rc1 Rd2 52. Rxc4 e3 53. Rc1 Rg2+ 54. Kh1 Rg4 55. Re1 Rxa4


-1: <p>In a casual game I played, my opponent castled around the 80th move. I want to know what was the latest move in which a player has castled, in an official game. I don’t think that there is an entry for this on Krabbe’s record site.</p>
 10380: <p><a href="https://www.chess.com/article/view/castling2" rel="nofollow noreferrer">This web page</a> claims that &quot;[the] latest castling was performed on move 48 in two games: Neshewat – Garrison, Detroit 1994 and Somogyi – Black, New York 2002.&quot;</p>
<p>According to <a href="https://www.chessgames.com" rel="nofollow noreferrer">https://www.chessgames.com</a>, <a href="https://www.chessgames.com/perl/chessgame?gid=1819049" rel="nofollow noreferrer">the first</a> was Michigan Class A (1994), Detroit, MI USA, rd 2, Jan-15. That site gives that second game <a href="https://www.chessgames.com/perl/chessgame?gid=1819050" rel="nofollow noreferrer">here</a> with no tournament or match citation. These are actually both on <a href="http://timkr.home.xs4all.nl/records" rel="nofollow noreferrer">Tim Krabbe's record page</a> under the title &quot;Latest castling&quot; in the &quot;Moves&quot; section.</p>
<p>Game 1: Kingside Castling</p>
<pre><code>[Title &quot;Neshewat-Garrison, Detroit, 1994&quot;]
[FEN &quot;&quot;]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Qa5+ 5. Bd2 Qb6 6. Nb3 Ne4 7. e3 Qf6 8. Qf3 Qxf3 9. gxf3 Nxd2 10. N1xd2 Nc6 11. a3 d6 12. Be2 g6 13. Rb1 a5 14. O-O a4 15. Nc1 Bf5 16. e4 Be6 17. Rd1 Bh6 18. Kg2 Nd4 19. Bd3 Ra5 20. Nf1 Rg5+ 21. Ng3 Nxf3 22. b4 Bg7 23. Be2 Nh4+ 24. Kh1 Bh3 25. f4 Bg2+ 26. Kg1 Bxe4 27. Nd3 Bd4+ 28. Kf1 Rxg3 29. hxg3 Nf5 30. Rdc1 Nxg3+ 31. Ke1 Be3 32. Rd1 Nf5 33. Rb2 Bd4 34. Ra2 Ne3 35. Rc1 Ng2+ 36. Kf1 Be3 37. Rc3 Bd4 38. Rc1 Be3 39. Rb1 Nxf4 40. Rd1  Ne6 41. Nf2 Bf5 42. Bd3 Nd4 43. Bxf5 Nxf5 44. Ke2 Bh6 45. Ne4 Bg7 46. c5 dxc5 47. Nxc5 Nd4+ 48. Kf2 O-O 49. Nxa4 e5 50. Nc5 Nb5 51. Rd7 b6 52. Rb7 Nc3 53. Rc2 e4 54. Rxb6 e3+ 55. Ke1 Rd8 56. Rc1 h5
</code></pre>
<p>Game 2: Queenside Castling</p>
<pre><code>[Title &quot;Somogyi-Black E., New York, 2002 &quot;]
[FEN &quot;&quot;]

1. e4 g6 2. d4 Bg7 3. Nc3 b6 4. Nf3 Bb7 5. Bf4 Nf6 6. Bc4 Nc6 7. O-O Nxe4 8. Nxe4 d5 9. Bd3 dxe4 10. Bxe4 e6 11. c3 Qe7 12. Ne5 Bxe5 13. dxe5 Na5 14. Bd3 a6 15. Qg4 h5 16. Qg3 h4 17. Qe3 Qd7 18. f3 Nc6 19. Rad1 Ne7 20. Bg5 h3 21. g4 Nd5 22. Qf2 c5 23. a3 Qc7 24. c4 Ne7 25. Qg3 Nc6 26. Bf6 Rh7 27. Rf2 Nd4 28. Bf1 b5 29. b4 bxc4 30. Bxc4 Qc6 31. Rd3 a5 32. b5 Qd7 33. a4 Bd5 34. Rc3 Bxc4 35. Rxc4 Qd5 36. Rc1 Nb3 37. Re1 c4 38. f4 Nc5 39. Qa3 Qd4 40. Qf3 Qd5 41. Qxd5 exd5 42. Rd1 Ne4 43. Rc2 Nxf6 44. exf6 Rh4 45. g5 Rg4+ 46. Kh1 Rxf4 47. Re2+ Re4 48. Rde1 O-O-O 49. Rxe4 dxe4 50. Kg1 Kb7 51. Rc1 Rd2 52. Rxc4 e3 53. Rc1 Rg2+ 54. Kh1 Rg4 55. Re1 Rxa4
</code></pre>
