NA vs EU Match Games
3 • IM jposthuma •- jposthuma (2249) - ihateyoumeg (1506)
- arjanvlith (2050) - jposthuma (2255)
- jposthuma (2248) - Komodo_Dragaon (2397)
- Maximus_23 (2013) - jposthuma (2242)
- IM jposthuma
2017 Michigan Class Championship Games
3 • IM jposthuma •- Joshua Posthuma (2255) - Manis Davidovich (2229) WIN
- Joshua Posthuma (2255) - Justin Liang (2039) WIN
- Alexander Deatrick (2136) - Joshua Posthuma (2255) DRAW
- Mark Heimann (2440) - Joshua Posthuma (2255) DRAW
- IM jposthuma
- NM mn8
- NM upandcomer
2017 Arnold Schwarzenegger Classic
2 • IM jposthuma •- vs Aryan Balyan
- vs Scott Ramer
- vs Awonder Liang
- vs Vincent Baker
- IM jposthuma
2017 Supernationals Games
11 • IM jposthuma •- Joshua Posthuma (2317) - Prateek Pinisetti (2133) 1-0
- Eric Hon (2058) - Joshua Posthuma (2317) 0-1
- Joshua Posthuma (2317) - Rochelle Wu (2082) 1-0
- IM Kesav Viswanadha (2458) - Joshua Posthuma (2317) 1-0
- IM jposthuma