2017 King's Island Open
3 • IM jposthuma •- Joshua Posthuma (2308) - Johnson Moore (2080) 1-0
- Mark Ferber (2154) - Joshua Posthuma (2308) 0-1
- Joshua Posthuma (2308) - Ben Li (2426) .5-.5
- William Sedlar (2373) - Joshua Posthuma (2308) .5-.5
- IM jposthuma
2017 Arnold Schwarzenegger Classic
2 • IM jposthuma •- vs Aryan Balyan
- vs Scott Ramer
- vs Awonder Liang
- vs Vincent Baker
- IM jposthuma
How to Beat the Caro - 9/11/2021
71 • IM jposthuma •- ~~~ Classical w Nh3! ~~~
- 6...h6?
- 6...e6
- 6...Nf6
- IM jposthuma
All of my tournament games, 2012-present
2 • IM jposthuma •- 2012
- Norman Haygood (1491) - Joshua Posthuma (1751)
- Harrison He (1643) - Joshua Posthuma (1776)
- 2013
- IM jposthuma