113 games in the PremovedPrep archive. Games as White.
| White | Black | Result | ECO | Event | Date |
|---|---|---|---|---|---|
| Posthuma, Joshua | Sam, Gabriel | 1/2-1/2 | E00 | 35th Annual Chicago Open | 2026-05-24 |
| Posthuma, Joshua | Sonis, Francesco | 1/2-1/2 | E00 | Round 4: Posthuma, Joshua - Sonis, Francesco | 2026-05-23 |
| Posthuma, Joshua | Budisavljevic, Luka | 1/2-1/2 | A40 | Round 8: Posthuma, Joshua - Budisavljevic, Luka | 2025-11-30 |
| Posthuma, Joshua | Kevlishvili, Robby | 0-1 | B50 | Round 2: Posthuma, Joshua - Kevlishvili, Robby | 2025-07-07 |
| Posthuma, Joshua | Cordova, Emilio | 1-0 | E00 | Round 4: Posthuma, Joshua - Cordova, Emilio | 2025-07-07 |
| Posthuma, Joshua | Narayanan, Samrug | 0-1 | E01 | Round 6: Posthuma, Joshua - Narayanan, Samrug | 2025-07-07 |
| Posthuma, Joshua | Zeltsan, Joseph | 1-0 | D01 | Round 8: Posthuma, Joshua - Zeltsan, Joseph | 2025-07-07 |
| Posthuma, Joshua | Grover, Sahaj | 1-0 | E00 | Budapest One Week GMA | 2024-08-19 |
| Posthuma, Joshua | Chubakov, Sultan | 1-0 | D00 | Budapest One Week GMA | 2024-08-18 |
| Posthuma, Joshua | Damjanovic, Vuk | 0-1 | B00 | Budapest One Week GMA | 2024-08-16 |
| Posthuma, Joshua | Nguyen, Huynh Minh Huy | * | D00 | Budapest One Week GMA | 2024-08-15 |
| Posthuma, Joshua | Melillo, Lucius | 1/2-1/2 | A04 | Round 9: Posthuma, Joshua - Melillo, Lucius | 2024-03-31 |
| Posthuma, Joshua | Nguyen, James Le | 1-0 | D00 | Round 7: Posthuma, Joshua - Nguyen, James Le | 2024-03-30 |
| Posthuma, Joshua | Horobetz, Graham | 1-0 | A45 | Round 5: Posthuma, Joshua - Horobetz, Graham | 2024-03-29 |
| Posthuma, Joshua | Fierro Baquero, Martha L. | 1-0 | B06 | Round 3: Posthuma, Joshua - Fierro Baquero, Martha L. | 2024-03-28 |
| Joshua Posthuma | Tran Gia Phuc Pham | 1/2-1/2 | E04 | Round 7: Joshua Posthuma - Tran Gia Phuc Pham | 2023-12-21 |
| Joshua Posthuma | Josiah Stearman | 0-1 | D26 | Round 8: Joshua Posthuma - Josiah Stearman | 2023-11-06 |
| Joshua Posthuma | Ekin Baris Ozenir | 1/2-1/2 | D23 | Round 6: Joshua Posthuma - Ekin Baris Ozenir | 2023-11-05 |
| Joshua Posthuma | Kostya Kavutskiy | 1-0 | E81 | Round 4: Joshua Posthuma - Kostya Kavutskiy | 2023-11-04 |
| Joshua Posthuma | Bach Ngo | 1/2-1/2 | A45 | Round 2: Joshua Posthuma - Bach Ngo | 2023-11-03 |
| Joshua Posthuma | Mark Heimann | 1/2-1/2 | D30 | Round 1: Joshua Posthuma - Mark Heimann | 2023-11-02 |
| Joshua Posthuma | Avi Harrison Kaplan | 1/2-1/2 | A30 | Round 8: Joshua Posthuma - Avi Harrison Kaplan | 2023-08-05 |
| Joshua Posthuma | Bojanovic Ratko | 1-0 | A40 | Round 7: Joshua Posthuma - Bojanovic Ratko | 2023-08-04 |
| Joshua Posthuma | Dmitry Gurevich | 0-1 | D30 | Round 3: Joshua Posthuma - Dmitry Gurevich | 2023-08-02 |
| Joshua Posthuma | Lazaro Bruzon Batista | 1/2-1/2 | A56 | Round 6: Joshua Posthuma - Lazaro Bruzon Batista | 2023-06-10 |
| Joshua Posthuma | Victor Matviishen | 0-1 | D11 | Round 11: Joshua Posthuma - Victor Matviishen | 2023-06-04 |
| Joshua Posthuma | Mateusz Bartel | 1/2-1/2 | D30 | Round 2: Joshua Posthuma - Mateusz Bartel | 2023-06-03 |
| Joshua Posthuma | Eric Liu | 1/2-1/2 | A55 | 32nd Annual Chicago Open | 2023-05-29 |
| Joshua Posthuma | Rose Atwell | 1-0 | E01 | 32nd Annual Chicago Open | 2023-05-28 |
| Joshua Posthuma | Tanitoluwa Adewumi | 1/2-1/2 | A46 | 32nd Annual Chicago Open | 2023-05-27 |
| Joshua Posthuma | Gabor Nagy | 1-0 | D30 | Round 8: Joshua Posthuma - Gabor Nagy | 2023-03-16 |
| Joshua Posthuma | Mike Ivanov | 1/2-1/2 | A05 | Round 6: Joshua Posthuma - Mike Ivanov | 2023-03-15 |
| Joshua Posthuma | Zachary Dukic | 1-0 | A07 | Round 4: Joshua Posthuma - Zachary Dukic | 2023-03-14 |
| Joshua Posthuma | Bator Sambuev | 1-0 | E04 | Round 2: Joshua Posthuma - Bator Sambuev | 2023-03-13 |
| Posthuma, Joshua | Antova, Gabriela | 1-0 | D30 | 2022 Saint Louis Norm Congress - International Master | 2022-05-23 |
| Posthuma, Joshua | Rodriguez Rivera, Pedro | 1-0 | A05 | 2022 Saint Louis Norm Congress - International Master | 2022-05-21 |
| Posthuma, Joshua | Proleiko, Julian | 1-0 | A05 | 2022 Saint Louis Norm Congress - International Master | 2022-05-20 |
| Joshua Posthuma | Ruiyang Yan | 1/2-1/2 | E06 | Round 9: Joshua Posthuma - Ruiyang Yan | 2022-03-20 |
| Joshua Posthuma | Roberto Martin Del Campo | 1/2-1/2 | A54 | Round 7: Joshua Posthuma - Roberto Martin Del Campo | 2022-03-19 |
| Joshua Posthuma | Nicolas De La Colina | 1-0 | E81 | Round 1: Joshua Posthuma - Nicolas De La Colina | 2022-03-17 |
| Joshua Posthuma | Oladapo Adu | 1/2-1/2 | D30 | Round 3: Joshua Posthuma - Oladapo Adu | 2022-03-17 |
| Joshua Posthuma | Guillermo Vazquez | 1/2-1/2 | D30 | Round 9: Joshua Posthuma - Guillermo Vazquez | 2022-01-17 |
| Joshua Posthuma | Rohan Talukdar | 1-0 | A30 | Round 7: Joshua Posthuma - Rohan Talukdar | 2022-01-16 |
| Joshua Posthuma | Gauri Shankar | 1-0 | E04 | Round 5: Joshua Posthuma - Gauri Shankar | 2022-01-15 |
| Joshua Posthuma | Abhimanyu Mishra | 1/2-1/2 | D30 | Round 3: Joshua Posthuma - Abhimanyu Mishra | 2022-01-14 |
| Joshua Posthuma | Mark Paragua | 1-0 | D30 | 49th Annual World Open | 2021-07-03 |
| Posthuma, Joshua | Akopian, Vladimir | * | E64 | 49th Annual World Open | 2021-07-02 |
| Joshua Posthuma | Samuel Schmakel | 1-0 | E04 | Round 8: Joshua Posthuma - Samuel Schmakel | 2021-06-20 |
| Joshua Posthuma | Melikset Khachiyan | 1/2-1/2 | D11 | Round 6: Joshua Posthuma - Melikset Khachiyan | 2021-06-19 |
| Joshua Posthuma | Titas Stremavicius | 1/2-1/2 | A86 | Round 2: Joshua Posthuma - Titas Stremavicius | 2021-06-17 |
| Joshua Posthuma | Evan Park | 1/2-1/2 | A86 | 1st Charlotte Masters - Round 6: Joshua Posthuma - Evan Park | 2021-02-15 |
| Joshua Posthuma | Isaac Chiu | 1-0 | A42 | 1st Charlotte Masters - Round 3: Joshua Posthuma - Isaac Chiu | 2021-02-14 |
| Joshua Posthuma | Naman Kumar | 1-0 | E01 | 1st Charlotte Masters - Round 1: Joshua Posthuma - Naman Kumar | 2021-02-13 |
| Posthuma, Joshua | Panjwani, Raja | 1/2-1/2 | B00 | Round 6: Posthuma, Joshua - Panjwani, Raja | |
| Posthuma, Joshua | Song, Edward | * | D11 | Round 9: Posthuma, Joshua - Song, Edward |