Joshua Posthuma
Country
USA
Birth Year
2000
Gender
M
Title
International Master
FIDE ID
2096889
FIDE Rating
2388
USCF ID
13856778
USCF Rating
2476
FIDE Rating Graph
USCF Rating Graph
Games
| # | Date | Event | Site | Round | White | Black | Result | Moves | View |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2025-11-30 | US Chess Masters 2025 | Charlotte USA | 8.21 | Joshua Posthuma | Luka Budisavljevic | 1/2-1/2 | 47 | Open |
| 2 | 2025-11-28 | US Chess Masters 2025 | Charlotte USA | 4.18 | Yair Parkhov | Joshua Posthuma | 1-0 | 40 | Open |
| 3 | 2025-08-06 | Royal City Masters 2025 | Guelph CAN | 9.4 | Joshua Posthuma | Edward Song | 1/2-1/2 | 35 | Open |
| 4 | 2025-08-05 | Royal City Masters 2025 | Guelph CAN | 8.1 | Toms Kantans | Joshua Posthuma | 1-0 | 40 | Open |
| 5 | 2025-08-05 | Royal City Masters 2025 | Guelph CAN | 7.5 | Larry Yang | Joshua Posthuma | 0-1 | 40 | Open |
| 6 | 2025-08-04 | Royal City Masters 2025 | Guelph CAN | 6.4 | Joshua Posthuma | Raja Panjwani | 1/2-1/2 | 36 | Open |
| 7 | 2025-08-03 | Royal City Masters 2025 | Guelph CAN | 5.7 | Joshua Posthuma | Luis Manuel Perez Rodriguez | 1-0 | 47 | Open |
| 8 | 2025-08-03 | Royal City Masters 2025 | Guelph CAN | 4.11 | Koosha Jaferian | Joshua Posthuma | 0-1 | 24 | Open |
| 9 | 2025-08-02 | Royal City Masters 2025 | Guelph CAN | 3.4 | Nikolay Noritsyn | Joshua Posthuma | 1-0 | 79 | Open |
| 10 | 2025-08-02 | Royal City Masters 2025 | Guelph CAN | 2.1 | Joshua Posthuma | Jesse Ren | 1-0 | 48 | Open |
| 11 | 2025-07-13 | Marshall Summer Inv GMA | New York USA | 9.1 | Viktor Matviishen | Joshua Posthuma | 1/2-1/2 | 15 | Open |
| 12 | 2025-07-12 | Marshall Summer Inv GMA | New York USA | 8.1 | Joshua Posthuma | Joseph Zeltsan | 1-0 | 31 | Open |
| 13 | 2025-07-12 | Marshall Summer Inv GMA | New York USA | 7.1 | Kyron Griffith | Joshua Posthuma | 1-0 | 49 | Open |
| 14 | 2025-07-11 | Marshall Summer Inv GMA | New York USA | 6.1 | Joshua Posthuma | Samrug Narayanan | 0-1 | 53 | Open |
| 15 | 2025-07-10 | Marshall Summer Inv GMA | New York USA | 5.1 | Eddy Tian | Joshua Posthuma | 1/2-1/2 | 29 | Open |
| 16 | 2025-07-10 | Marshall Summer Inv GMA | New York USA | 4.1 | Joshua Posthuma | Emilio Cordova | 1-0 | 41 | Open |
| 17 | 2025-07-09 | Marshall Summer Inv GMA | New York USA | 3.1 | Luis Carlos Torres Rosas | Joshua Posthuma | 0-1 | 49 | Open |
| 18 | 2025-07-09 | Marshall Summer Inv GMA | New York USA | 2.1 | Joshua Posthuma | Robby Kevlishvili | 0-1 | 59 | Open |
| 19 | 2025-07-08 | Marshall Summer Inv GMA | New York USA | 1.1 | Liam Putnam | Joshua Posthuma | 1/2-1/2 | 27 | Open |
| 20 | 2025-07-04 | 53rd Annual World Open | Philadelphia USA | 4.7 | Joshua Posthuma | Robby Kevlishvili | 0-1 | 0 | Open |
| 21 | 2024-09-14 | FSGM September 2024 | Budapest HUN | 9.3 | Joshua Posthuma | Edoardo Di Benedetto | 1/2-1/2 | 30 | Open |
| 22 | 2024-09-13 | FSGM September 2024 | Budapest HUN | 8.3 | Valeriy Neverov | Joshua Posthuma | 1-0 | 49 | Open |
| 23 | 2024-09-12 | FSGM September 2024 | Budapest HUN | 7.4 | Joshua Posthuma | Marco Dobrikov | 0-1 | 49 | Open |
| 24 | 2024-09-12 | FSGM September 2024 | Budapest HUN | 6.2 | Sai Krishna G V | Joshua Posthuma | 1-0 | 39 | Open |
| 25 | 2024-09-11 | FSGM September 2024 | Budapest HUN | 5.5 | Joshua Posthuma | Lajos Seres | 1-0 | 43 | Open |
| 26 | 2024-09-10 | FSGM September 2024 | Budapest HUN | 4.1 | Khamparia Akshat | Joshua Posthuma | 1-0 | 72 | Open |
| 27 | 2024-09-09 | FSGM September 2024 | Budapest HUN | 3.5 | Emin Ohanyan | Joshua Posthuma | 1/2-1/2 | 59 | Open |
| 28 | 2024-09-08 | FSGM September 2024 | Budapest HUN | 2.2 | Joshua Posthuma | Sathvik Adiga | 1/2-1/2 | 74 | Open |
| 29 | 2024-09-07 | FSGM September 2024 | Budapest HUN | 1.4 | Selim Citak | Joshua Posthuma | 1/2-1/2 | 77 | Open |
| 30 | 2024-09-05 | Vezerkepzo GM Kluger Mem | Budapest HUN | 9.2 | Adithya A Chullikkad | Joshua Posthuma | 0-1 | 21 | Open |
| 31 | 2024-09-04 | Vezerkepzo GM Kluger Mem | Budapest HUN | 8.5 | Joshua Posthuma | Sai Krishna G V | 1/2-1/2 | 77 | Open |
| 32 | 2024-09-03 | Vezerkepzo GM Kluger Mem | Budapest HUN | 7.1 | Joshua Posthuma | Felix Xie | 1-0 | 54 | Open |
| 33 | 2024-09-02 | Vezerkepzo GM Kluger Mem | Budapest HUN | 6.5 | Tamas Jr. Fodor | Joshua Posthuma | 1-0 | 34 | Open |
| 34 | 2024-09-01 | Vezerkepzo GM Kluger Mem | Budapest HUN | 5.2 | Joshua Posthuma | Sathvik Adiga | 0-1 | 66 | Open |
| 35 | 2024-08-30 | Vezerkepzo GM Kluger Mem | Budapest HUN | 4.4 | Endre Csiki | Joshua Posthuma | 1-0 | 51 | Open |
| 36 | 2024-08-30 | Vezerkepzo GM Kluger Mem | Budapest HUN | 3.3 | Joshua Posthuma | Roberto Garcia Pantoja | 1-0 | 54 | Open |
| 37 | 2024-08-29 | Vezerkepzo GM Kluger Mem | Budapest HUN | 2.3 | Jose Gabriel Cardoso Cardoso | Joshua Posthuma | 1-0 | 49 | Open |
| 38 | 2024-08-28 | Vezerkepzo GM Kluger Mem | Budapest HUN | 1.4 | Joshua Posthuma | Levente Papp | 1/2-1/2 | 52 | Open |
| 39 | 2024-08-20 | Budapest 1 Week Aug GMA | Budapest HUN | 9.1 | Misa Pap | Joshua Posthuma | 1/2-1/2 | 80 | Open |
| 40 | 2024-08-19 | Budapest 1 Week Aug GMA | Budapest HUN | 8.1 | Joshua Posthuma | Sahaj Grover | 1-0 | 40 | Open |
| 41 | 2024-08-18 | Budapest 1 Week Aug GMA | Budapest HUN | 7.1 | Artem Tyurin | Joshua Posthuma | 1/2-1/2 | 64 | Open |
| 42 | 2024-08-18 | Budapest 1 Week Aug GMA | Budapest HUN | 6.1 | Joshua Posthuma | Sultan Chubakov | 1-0 | 29 | Open |
| 43 | 2024-08-17 | Budapest 1 Week Aug GMA | Budapest HUN | 5.1 | Azarya Jodi Setyaki | Joshua Posthuma | 1/2-1/2 | 74 | Open |
| 44 | 2024-08-16 | Budapest 1 Week Aug GMA | Budapest HUN | 4.1 | Joshua Posthuma | Vuk Damjanovic | 0-1 | 47 | Open |
| 45 | 2024-08-16 | Budapest 1 Week Aug GMA | Budapest HUN | 3.1 | Ferenc Jr. Gombocz | Joshua Posthuma | 1/2-1/2 | 64 | Open |
| 46 | 2024-08-15 | Budapest 1 Week Aug GMA | Budapest HUN | 2.1 | Joshua Posthuma | Huynh Minh Huy Nguyen | 0-1 | 44 | Open |
| 47 | 2024-08-14 | Budapest 1 Week Aug GMA | Budapest HUN | 1.1 | Jakub Fus | Joshua Posthuma | 1/2-1/2 | 59 | Open |
| 48 | 2024-06-30 | 17th Philadelphia Int | Philadelphia USA | 7.4 | Fidel Corrales Jimenez | Joshua Posthuma | 1-0 | 59 | Open |
| 49 | 2024-03-31 | Charlotte Spring IMC 2024 | Charlotte USA | 9.2 | Joshua Posthuma | Lucius Melillo | 1/2-1/2 | 47 | Open |
| 50 | 2024-03-31 | Charlotte Spring IMC 2024 | Charlotte USA | 8.4 | Sibo Wu | Joshua Posthuma | 0-1 | 97 | Open |
| 51 | 2024-03-30 | Charlotte Spring IMC 2024 | Charlotte USA | 7.3 | Joshua Posthuma | James Le Nguyen | 1-0 | 56 | Open |
| 52 | 2024-03-30 | Charlotte Spring IMC 2024 | Charlotte USA | 6.3 | Harshid Kunka | Joshua Posthuma | 1/2-1/2 | 32 | Open |
| 53 | 2024-03-29 | Charlotte Spring IMC 2024 | Charlotte USA | 5.4 | Joshua Posthuma | Graham Horobetz | 1-0 | 33 | Open |
| 54 | 2024-03-29 | Charlotte Spring IMC 2024 | Charlotte USA | 4.2 | Yessica Yissel Mendez Tovar | Joshua Posthuma | 0-1 | 35 | Open |
| 55 | 2024-03-28 | Charlotte Spring IMC 2024 | Charlotte USA | 3.5 | Joshua Posthuma | Martha L. Fierro Baquero | 1-0 | 31 | Open |
| 56 | 2024-03-28 | Charlotte Spring IMC 2024 | Charlotte USA | 2.1 | Doug Eckert | Joshua Posthuma | 1/2-1/2 | 50 | Open |
| 57 | 2024-03-27 | Charlotte Spring IMC 2024 | Charlotte USA | 1.5 | Dimitri Komarov | Joshua Posthuma | 1/2-1/2 | 31 | Open |
| 58 | 2023-12-21 | SPICE Cup Open 2023 | Chesterfield MO USA | 8.4 | Aram Hakobyan | Joshua Posthuma | 1-0 | 36 | Open |
| 59 | 2023-12-21 | SPICE Cup Open 2023 | Chesterfield MO USA | 7.4 | Joshua Posthuma | Pham Tran Gia Phuc | 1/2-1/2 | 21 | Open |
| 60 | 2023-12-20 | SPICE Cup Open 2023 | Chesterfield MO USA | 6.9 | Annamaria Marjanovic | Joshua Posthuma | 0-1 | 61 | Open |
| 61 | 2023-12-19 | SPICE Cup Open 2023 | Chesterfield MO USA | 4.9 | Joshua Posthuma | Ethan Sheehan | 1-0 | 39 | Open |
| 62 | 2023-12-18 | SPICE Cup Open 2023 | Chesterfield MO USA | 3.7 | Joshua Posthuma | Harsha Bharathakoti | 0-1 | 31 | Open |
| 63 | 2023-12-18 | SPICE Cup Open 2023 | Chesterfield MO USA | 2.8 | Isaac Wang | Joshua Posthuma | 1/2-1/2 | 29 | Open |
| 64 | 2023-12-17 | SPICE Cup Open 2023 | Chesterfield MO USA | 1.12 | Joshua Posthuma | Jingyun (ryan) Yang | 1-0 | 64 | Open |
| 65 | 2023-11-06 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 9.1 | Jakub Fus | Joshua Posthuma | 1/2-1/2 | 37 | Open |
| 66 | 2023-11-06 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 8.1 | Joshua Posthuma | Josiah Stearman | 0-1 | 40 | Open |
| 67 | 2023-11-05 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 7.1 | Luka Budisavljevic | Joshua Posthuma | 0-1 | 25 | Open |
| 68 | 2023-11-05 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 6.1 | Joshua Posthuma | Ekin Baris Ozenir | 1/2-1/2 | 49 | Open |
| 69 | 2023-11-04 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 5.1 | Robby Kevlishvili | Joshua Posthuma | 1/2-1/2 | 72 | Open |
| 70 | 2023-11-04 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 4.1 | Joshua Posthuma | Kostya Kavutskiy | 1-0 | 47 | Open |
| 71 | 2023-11-03 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 3.1 | Alexander Fishbein | Joshua Posthuma | 1/2-1/2 | 21 | Open |
| 72 | 2023-11-03 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 2.1 | Joshua Posthuma | Bach Ngo | 1/2-1/2 | 72 | Open |
| 73 | 2023-11-02 | 1000GM Nov GM 2023 | Fort Lauderdale USA | 1.1 | Joshua Posthuma | Mark Heimann | 1/2-1/2 | 33 | Open |
| 74 | 2023-08-06 | 123nd US Open 2023 | Grand Rapids, MI USA | 9.4 | David Brodsky | Joshua Posthuma | 1/2-1/2 | 58 | Open |
| 75 | 2023-08-05 | 123nd US Open 2023 | Grand Rapids, MI USA | 8.6 | Joshua Posthuma | Avi Harrison Kaplan | 1/2-1/2 | 26 | Open |
| 76 | 2023-08-04 | 123nd US Open 2023 | Grand Rapids, MI USA | 7.8 | Joshua Posthuma | 7820848936157116265 | 1-0 | 1 | Open |
| 77 | 2023-08-02 | 123nd US Open 2023 | Grand Rapids, MI USA | 5.8 | Kostya Kavutskiy | Joshua Posthuma | 0-1 | 35 | Open |
| 78 | 2023-07-31 | 123nd US Open 2023 | Grand Rapids, MI USA | 3.8 | Joshua Posthuma | Dmitry Gurevich | 0-1 | 48 | Open |
| 79 | 2023-07-29 | 123nd US Open 2023 | Grand Rapids, MI USA | 1.8 | Nicholas Ladan | Joshua Posthuma | 0-1 | 36 | Open |
| 80 | 2023-06-11 | CAN Transnational Classic | Montreal CAN | 9.1 | Gergely-Andras-Gyula Szabo | Joshua Posthuma | 1/2-1/2 | 7 | Open |
| 81 | 2023-06-11 | CAN Transnational Classic | Montreal CAN | 8.16 | Joshua Posthuma | Thalia Cervantes Landeiro | 1-0 | 44 | Open |
| 82 | 2023-06-10 | CAN Transnational Classic | Montreal CAN | 7.8 | Arturs Neiksans | Joshua Posthuma | 1-0 | 32 | Open |
| 83 | 2023-06-10 | CAN Transnational Classic | Montreal CAN | 6.6 | Joshua Posthuma | Lazaro Bruzon Batista | 1/2-1/2 | 63 | Open |
| 84 | 2023-06-09 | CAN Transnational Classic | Montreal CAN | 5.8 | Aleksandr Lenderman | Joshua Posthuma | 1/2-1/2 | 47 | Open |
| 85 | 2023-06-09 | CAN Transnational Classic | Montreal CAN | 4.16 | Joshua Posthuma | Eugene Hua | 1-0 | 32 | Open |
| 86 | 2023-06-08 | CAN Transnational Classic | Montreal CAN | 3.7 | Viktor Matviishen | Joshua Posthuma | 1-0 | 28 | Open |
| 87 | 2023-06-07 | CAN Transnational Classic | Montreal CAN | 2.7 | Joshua Posthuma | Omar Almeida Quintana | 1/2-1/2 | 50 | Open |
| 88 | 2023-06-06 | CAN Transnational Classic | Montreal CAN | 1.21 | Oksana Golubeva | Joshua Posthuma | 0-1 | 77 | Open |
| 89 | 2023-06-04 | CAN Transnational Rapid | Toronto CAN | 11.8 | Joshua Posthuma | Viktor Matviishen | 0-1 | 44 | Open |
| 90 | 2023-06-03 | CAN Transnational Rapid | Toronto CAN | 3.3 | Lazaro Bruzon Batista | Joshua Posthuma | 1-0 | 31 | Open |
| 91 | 2023-06-03 | CAN Transnational Rapid | Toronto CAN | 2.2 | Joshua Posthuma | Mateusz Bartel | 1/2-1/2 | 36 | Open |
| 92 | 2023-06-03 | CAN Transnational Rapid | Toronto CAN | 1.1 | Evgeny Bareev | Joshua Posthuma | 0-1 | 35 | Open |
| 93 | 2023-05-29 | 32nd Chicago Open 2023 | Chicago USA | 9 | Joshua Posthuma | Eric Liu | 1/2-1/2 | 78 | Open |
| 94 | 2023-05-29 | 32nd Chicago Open 2023 | Chicago USA | 8 | Nicholas Ladan | Joshua Posthuma | 0-1 | 24 | Open |
| 95 | 2023-05-28 | 32nd Chicago Open 2023 | Chicago USA | 7 | Joshua Posthuma | Rose Atwell | 1-0 | 41 | Open |
| 96 | 2023-05-28 | 32nd Chicago Open 2023 | Chicago USA | 6 | Ryan Amburgy | Joshua Posthuma | 1-0 | 53 | Open |
| 97 | 2023-05-27 | 32nd Chicago Open 2023 | Chicago USA | 5 | Joshua Posthuma | Tanitoluwa Adewumi | 1/2-1/2 | 55 | Open |
| 98 | 2023-05-27 | 32nd Chicago Open 2023 | Chicago USA | 4 | Dachey Lin | Joshua Posthuma | 1/2-1/2 | 69 | Open |
| 99 | 2023-03-17 | Excelsior March GM 2023 | Toronto CAN | 9.5 | Anthony Atanasov | Joshua Posthuma | 1/2-1/2 | 65 | Open |
| 100 | 2023-03-16 | Excelsior March GM 2023 | Toronto CAN | 8.3 | Joshua Posthuma | Gabor Nagy | 1-0 | 43 | Open |
| 101 | 2023-03-16 | Excelsior March GM 2023 | Toronto CAN | 7.2 | Mark Plotkin | Joshua Posthuma | 0-1 | 26 | Open |
| 102 | 2023-03-15 | Excelsior March GM 2023 | Toronto CAN | 6.5 | Joshua Posthuma | Mike Ivanov | 1/2-1/2 | 50 | Open |
| 103 | 2023-03-15 | Excelsior March GM 2023 | Toronto CAN | 5.4 | Luis Fernando Ibarra Chami | Joshua Posthuma | 1/2-1/2 | 38 | Open |
| 104 | 2023-03-14 | Excelsior March GM 2023 | Toronto CAN | 4.3 | Joshua Posthuma | Zachary Dukic | 1-0 | 43 | Open |
| 105 | 2023-03-14 | Excelsior March GM 2023 | Toronto CAN | 3.2 | Nikolay Noritsyn | Joshua Posthuma | 1/2-1/2 | 54 | Open |
| 106 | 2023-03-13 | Excelsior March GM 2023 | Toronto CAN | 2.1 | Joshua Posthuma | Bator Sambuev | 1-0 | 65 | Open |
| 107 | 2023-03-13 | Excelsior March GM 2023 | Toronto CAN | 1.1 | Victor Mikhalevski | Joshua Posthuma | 1/2-1/2 | 62 | Open |
| 108 | 2022-05-30 | 31st Chicago Open 2022 | Chicago USA | 9 | Joshua Posthuma | Mikhail Al. Antipov | 1/2-1/2 | 16 | Open |
| 109 | 2022-05-30 | 31st Chicago Open 2022 | Chicago USA | 8 | Joshua Posthuma | Tatev Abrahamyan | 1-0 | 38 | Open |
| 110 | 2022-05-29 | 31st Chicago Open 2022 | Chicago USA | 7 | Christopher Shen | Joshua Posthuma | 1/2-1/2 | 43 | Open |
| 111 | 2022-05-29 | 31st Chicago Open 2022 | Chicago USA | 6 | Joshua Posthuma | Emilio Cordova | 0-1 | 37 | Open |
| 112 | 2022-05-28 | 31st Chicago Open 2022 | Chicago USA | 5 | James Canty | Joshua Posthuma | 0-1 | 35 | Open |
| 113 | 2022-05-28 | 31st Chicago Open 2022 | Chicago USA | 4 | Joshua Posthuma | Tanitoluwa Adewumi | 1/2-1/2 | 94 | Open |
| 114 | 2022-05-27 | 31st Chicago Open 2022 | Chicago USA | 3 | Timur Gareyev | Joshua Posthuma | 1-0 | 30 | Open |
| 115 | 2022-05-27 | 31st Chicago Open 2022 | Chicago USA | 2 | Joshua Posthuma | Ryo Chen | 1-0 | 42 | Open |
| 116 | 2022-05-24 | Saint Louis Congress IM | Saint Louis USA | 9.1 | Aaron Grabinsky | Joshua Posthuma | 1/2-1/2 | 68 | Open |
| 117 | 2022-05-23 | Saint Louis Congress IM | Saint Louis USA | 8.1 | Joshua Posthuma | Gabriela Antova | 1-0 | 41 | Open |
| 118 | 2022-05-22 | Saint Louis Congress IM | Saint Louis USA | 7.1 | Matyas Marek | Joshua Posthuma | 1/2-1/2 | 4 | Open |
| 119 | 2022-05-22 | Saint Louis Congress IM | Saint Louis USA | 6.1 | Joshua Posthuma | Ezra Paul Chambers | 1-0 | 62 | Open |
| 120 | 2022-05-21 | Saint Louis Congress IM | Saint Louis USA | 5.1 | Jennifer Yu | Joshua Posthuma | 0-1 | 39 | Open |
| 121 | 2022-05-21 | Saint Louis Congress IM | Saint Louis USA | 4.1 | Joshua Posthuma | Pedro Rodriguez Rivera | 1-0 | 52 | Open |
| 122 | 2022-05-20 | Saint Louis Congress IM | Saint Louis USA | 3.1 | Alice Lee | Joshua Posthuma | 1/2-1/2 | 91 | Open |
| 123 | 2022-05-20 | Saint Louis Congress IM | Saint Louis USA | 2.1 | Joshua Posthuma | Julian Proleiko | 1-0 | 54 | Open |
| 124 | 2022-05-19 | Saint Louis Congress IM | Saint Louis USA | 1.1 | Gulrukhbegim Tokhirjonova | Joshua Posthuma | 1/2-1/2 | 57 | Open |
| 125 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 9 | Dejan Tasev | Joshua Posthuma | 1-0 | 50 | Open |
| 126 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 8 | Joshua Posthuma | Fabiano Caruana | 0-1 | 36 | Open |
| 127 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 7 | Qi b Chen | Joshua Posthuma | 0-1 | 27 | Open |
| 128 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 6 | Joshua Posthuma | Chithambaram VR. Aravindh | 0-1 | 34 | Open |
| 129 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 5 | Abtin Atakhan | Joshua Posthuma | 0-1 | 40 | Open |
| 130 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 4 | Joshua Posthuma | Alexander Reprintsev | 1-0 | 62 | Open |
| 131 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 3 | Joshua Posthuma | Vladimir Demin | 1-0 | 20 | Open |
| 132 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 2 | Jyrki Kiltti | Joshua Posthuma | 0-1 | 32 | Open |
| 133 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 11 | Koosha Jaferian | Joshua Posthuma | 0-1 | 52 | Open |
| 134 | 2022-03-29 | Titled Tue 29th Mar Early | chess.com INT | 10 | Joshua Posthuma | Ivan Zemlyanskii | 1-0 | 35 | Open |
| 135 | 2022-03-20 | Charlotte Spring IMC 2022 | Charlotte USA | 9.1 | Joshua Posthuma | Ruiyang Yan | 1/2-1/2 | 13 | Open |
| 136 | 2022-03-20 | Charlotte Spring IMC 2022 | Charlotte USA | 8.5 | Mike Ivanov | Joshua Posthuma | 0-1 | 56 | Open |
| 137 | 2022-03-19 | Charlotte Spring IMC 2022 | Charlotte USA | 7.2 | Joshua Posthuma | Roberto Abel Martin Del Campo Cardenas | 1/2-1/2 | 70 | Open |
| 138 | 2022-03-19 | Charlotte Spring IMC 2022 | Charlotte USA | 6.4 | Brewington Hardaway | Joshua Posthuma | 0-1 | 45 | Open |
| 139 | 2022-03-18 | Charlotte Spring IMC 2022 | Charlotte USA | 5.3 | Joshua Posthuma | James Canty | 1-0 | 53 | Open |
| 140 | 2022-03-18 | Charlotte Spring IMC 2022 | Charlotte USA | 4.3 | Vishnu Vanapalli | Joshua Posthuma | 0-1 | 56 | Open |
| 141 | 2022-03-17 | Charlotte Spring IMC 2022 | Charlotte USA | 3.4 | Joshua Posthuma | Oladapo ADU | 1/2-1/2 | 67 | Open |
| 142 | 2022-03-17 | Charlotte Spring IMC 2022 | Charlotte USA | 2.2 | Nikolai Andrianov | Joshua Posthuma | 1/2-1/2 | 60 | Open |
| 143 | 2022-03-16 | Charlotte Spring IMC 2022 | Charlotte USA | 1.5 | Joshua Posthuma | Nicolas De La Colina | 1-0 | 52 | Open |
| 144 | 2022-01-17 | CCCSA Winter GMA 2022 | Charlotte USA | 9.2 | Joshua Posthuma | Guillermo Vazquez | 1/2-1/2 | 19 | Open |
| 145 | 2022-01-17 | CCCSA Winter GMA 2022 | Charlotte USA | 8.4 | Craig Hilby | Joshua Posthuma | 1/2-1/2 | 30 | Open |
| 146 | 2022-01-16 | CCCSA Winter GMA 2022 | Charlotte USA | 7.3 | Joshua Posthuma | Rohan Talukdar | 1-0 | 26 | Open |
| 147 | 2022-01-16 | CCCSA Winter GMA 2022 | Charlotte USA | 6.3 | Titas Stremavicius | Joshua Posthuma | 1/2-1/2 | 64 | Open |
| 148 | 2022-01-15 | CCCSA Winter GMA 2022 | Charlotte USA | 5.4 | Joshua Posthuma | Shankar Gauri | 1-0 | 44 | Open |
| 149 | 2022-01-15 | CCCSA Winter GMA 2022 | Charlotte USA | 4.2 | Jianchao Zhou | Joshua Posthuma | 1-0 | 35 | Open |
| 150 | 2022-01-14 | CCCSA Winter GMA 2022 | Charlotte USA | 3.5 | Joshua Posthuma | Abhimanyu Mishra | 1/2-1/2 | 51 | Open |
| 151 | 2022-01-14 | CCCSA Winter GMA 2022 | Charlotte USA | 2.1 | Josiah Stearman | Joshua Posthuma | 1/2-1/2 | 69 | Open |
| 152 | 2022-01-13 | CCCSA Winter GMA 2022 | Charlotte USA | 1.5 | Anish Vivekananthan | Joshua Posthuma | 1/2-1/2 | 49 | Open |
| 153 | 2021-09-26 | Indy FIDE - Premier 2021 | Indianapolis USA | 5 | Joshua Posthuma | Bryan Smith | 1-0 | 56 | Open |
| 154 | 2021-09-26 | Indy FIDE - Premier 2021 | Indianapolis USA | 4 | Joshua Posthuma | James Le Nguyen | 1-0 | 33 | Open |
| 155 | 2021-09-25 | Indy FIDE - Premier 2021 | Indianapolis USA | 3 | Josh Smith | Joshua Posthuma | 0-1 | 24 | Open |
| 156 | 2021-09-25 | Indy FIDE - Premier 2021 | Indianapolis USA | 2 | Joshua Posthuma | Safal Bora | 0-1 | 34 | Open |
| 157 | 2021-09-24 | Indy FIDE - Premier 2021 | Indianapolis USA | 1 | Stuart Toliver | Joshua Posthuma | 0-1 | 51 | Open |
| 158 | 2021-07-03 | 49th Annual World Open | Philadelphia USA | 4 | Joshua Posthuma | Mark Paragua | 1-0 | 33 | Open |
| 159 | 2021-07-02 | 49th Annual World Open | Philadelphia USA | 2.4 | Joshua Posthuma | Vladimir Akopian | 1/2-1/2 | 60 | Open |
| 160 | 2021-06-20 | National Open 2021 | Las Vegas USA | 9.9 | Viktor Matviishen | Joshua Posthuma | 0-1 | 32 | Open |
| 161 | 2021-06-20 | National Open 2021 | Las Vegas USA | 8.22 | Joshua Posthuma | Sam Schmakel | 1-0 | 34 | Open |
| 162 | 2021-06-19 | National Open 2021 | Las Vegas USA | 6.23 | Joshua Posthuma | Melikset Khachiyan | 1/2-1/2 | 42 | Open |
| 163 | 2021-06-18 | National Open 2021 | Las Vegas USA | 5.23 | Joshua Posthuma | Andrew Tang | 0-1 | 36 | Open |
| 164 | 2021-06-18 | National Open 2021 | Las Vegas USA | 4.8 | Steven Zierk | Joshua Posthuma | 1/2-1/2 | 31 | Open |
| 165 | 2021-06-17 | National Open 2021 | Las Vegas USA | 3.16 | Pavlo Vorontsov | Joshua Posthuma | 0-1 | 44 | Open |
| 166 | 2021-06-17 | National Open 2021 | Las Vegas USA | 2.15 | Joshua Posthuma | Titas Stremavicius | 1/2-1/2 | 30 | Open |
| 167 | 2021-06-15 | Titled Tuesday 15th June | chess.com INT | 7 | Joseph Levine | Joshua Posthuma | 1-0 | 24 | Open |
| 168 | 2021-06-15 | Titled Tuesday 15th June | chess.com INT | 6 | Joshua Posthuma | Naveen Jain | 1/2-1/2 | 110 | Open |
| 169 | 2021-06-15 | Titled Tuesday 15th June | chess.com INT | 5 | Vadim Karpov | Joshua Posthuma | 1-0 | 23 | Open |
| 170 | 2021-06-15 | Titled Tuesday 15th June | chess.com INT | 4 | Joshua Posthuma | Alejandro Jose Pacheco Lugo | 1-0 | 19 | Open |
| 171 | 2021-06-15 | Titled Tuesday 15th June | chess.com INT | 3 | Bernardo Vainzoff Sztokbant | Joshua Posthuma | 1-0 | 28 | Open |
| 172 | 2021-06-15 | Titled Tuesday 15th June | chess.com INT | 2 | Joshua Posthuma | Nadya Toncheva | 0-1 | 77 | Open |
| 173 | 2021-06-15 | Titled Tuesday 15th June | chess.com INT | 1 | Justin Sarkar | Joshua Posthuma | 0-1 | 39 | Open |
| 174 | 2021-04-13 | Titled Tuesday 13th Apr | chess.com INT | 9 | Joshua Posthuma | Mykola Bodnar | 0-1 | 36 | Open |
| 175 | 2021-04-13 | Titled Tuesday 13th Apr | chess.com INT | 8 | Guillermo Baches Garcia | Joshua Posthuma | 0-1 | 30 | Open |
| 176 | 2021-04-13 | Titled Tuesday 13th Apr | chess.com INT | 7 | Joshua Posthuma | Stefan Mazur | 1-0 | 29 | Open |
| 177 | 2021-04-13 | Titled Tuesday 13th Apr | chess.com INT | 5 | Joshua Posthuma | Narmin Khalafova | 1-0 | 46 | Open |
| 178 | 2021-04-13 | Titled Tuesday 13th Apr | chess.com INT | 4 | Aleksander Hnydiuk | Joshua Posthuma | 1-0 | 49 | Open |
| 179 | 2021-04-13 | Titled Tuesday 13th Apr | chess.com INT | 3 | Joshua Posthuma | Olexandr Bortnyk | 0-1 | 48 | Open |
| 180 | 2021-04-13 | Titled Tuesday 13th Apr | chess.com INT | 11 | Joshua Posthuma | Nicolas Brunner | 1/2-1/2 | 75 | Open |
| 181 | 2021-04-13 | Titled Tuesday 13th Apr | chess.com INT | 10 | Boris Abrashkin | Joshua Posthuma | 0-1 | 21 | Open |
| 182 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 9 | Joshua Posthuma | Kirill Shevchenko | 1-0 | 50 | Open |
| 183 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 8 | Joshua Posthuma | Vsevolod Ovchinnikov | 1-0 | 88 | Open |
| 184 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 7 | Eduardo Peralta | Joshua Posthuma | 0-1 | 54 | Open |
| 185 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 6 | Joshua Posthuma | Pavel Eljanov | 0-1 | 38 | Open |
| 186 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 5 | Maksim Zhukov | Joshua Posthuma | 0-1 | 65 | Open |
| 187 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 4 | Joshua Posthuma | M Ruben D Zacarias | 1-0 | 35 | Open |
| 188 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 3 | Tuan Minh Le | Joshua Posthuma | 1-0 | 29 | Open |
| 189 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 2 | Joshua Posthuma | Naveen Jain | 1-0 | 31 | Open |
| 190 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 1 | Sandi Stojanovski | Joshua Posthuma | 0-1 | 25 | Open |
| 191 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 11 | Giga Quparadze | Joshua Posthuma | 0-1 | 79 | Open |
| 192 | 2021-03-09 | Titled Tuesday 9th Mar | chess.com INT | 10 | Baadur Jobava | Joshua Posthuma | 1-0 | 107 | Open |
| 193 | 2021-03-02 | Titled Tuesday 2nd Mar | chess.com INT | 7 | Joshua Posthuma | Owen McCoy | 0-1 | 42 | Open |
| 194 | 2021-03-02 | Titled Tuesday 2nd Mar | chess.com INT | 6 | Serhan Berat Ozdemir | Joshua Posthuma | 1-0 | 25 | Open |
| 195 | 2021-03-02 | Titled Tuesday 2nd Mar | chess.com INT | 5 | Lilit Mkrtchian | Joshua Posthuma | 0-1 | 59 | Open |
| 196 | 2021-03-02 | Titled Tuesday 2nd Mar | chess.com INT | 2 | Ali Mortazavi | Joshua Posthuma | 1-0 | 58 | Open |
| 197 | 2021-03-02 | Titled Tuesday 2nd Mar | chess.com INT | 1 | Joshua Posthuma | Arnold Mayeregger | 1-0 | 56 | Open |
| 198 | 2021-02-15 | CCCSA Charlotte Masters | Charlotte USA | 6.6 | Joshua Posthuma | Evan Park | 1/2-1/2 | 50 | Open |
| 199 | 2021-02-15 | CCCSA Charlotte Masters | Charlotte USA | 5.4 | Joshua Colas | Joshua Posthuma | 1-0 | 47 | Open |
| 200 | 2021-02-14 | CCCSA Charlotte Masters | Charlotte USA | 4.4 | Tianqi Wang | Joshua Posthuma | 1/2-1/2 | 37 | Open |
| 201 | 2021-02-14 | CCCSA Charlotte Masters | Charlotte USA | 3.4 | Joshua Posthuma | Isaac Chiu | 1-0 | 58 | Open |
| 202 | 2021-02-13 | CCCSA Charlotte Masters | Charlotte USA | 2.3 | Rochelle Wu | Joshua Posthuma | 1-0 | 37 | Open |
| 203 | 2021-02-13 | CCCSA Charlotte Masters | Charlotte USA | 1.6 | Joshua Posthuma | Naman Kumar | 1-0 | 39 | Open |
| 204 | 2020-11-29 | CCCSA Thanksgiving IM | Charlotte USA | 9.5 | Joshua Posthuma | Vishnuvardhan Arjun | 0-1 | 33 | Open |
| 205 | 2020-11-29 | CCCSA Thanksgiving IM | Charlotte USA | 8.5 | Nikolai Andrianov | Joshua Posthuma | 1-0 | 52 | Open |
| 206 | 2020-11-28 | CCCSA Thanksgiving IM | Charlotte USA | 7.2 | Joshua Posthuma | Eric Li | 1/2-1/2 | 42 | Open |
| 207 | 2020-11-28 | CCCSA Thanksgiving IM | Charlotte USA | 6.4 | Robert Shlyakhtenko | Joshua Posthuma | 1-0 | 46 | Open |
| 208 | 2020-11-27 | CCCSA Thanksgiving IM | Charlotte USA | 5.1 | Joshua Posthuma | Lev Paciorkowski | 0-1 | 48 | Open |
| 209 | 2020-11-27 | CCCSA Thanksgiving IM | Charlotte USA | 4.3 | Anthony Atanasov | Joshua Posthuma | 0-1 | 70 | Open |
| 210 | 2020-11-26 | CCCSA Thanksgiving IM | Charlotte USA | 3.4 | Joshua Posthuma | Aaron Jacobson | 1/2-1/2 | 64 | Open |
| 211 | 2020-11-26 | CCCSA Thanksgiving IM | Charlotte USA | 2.2 | Nikhil Kumar | Joshua Posthuma | 1-0 | 51 | Open |
| 212 | 2020-11-25 | CCCSA Thanksgiving IM | Charlotte USA | 1.5 | Joshua Posthuma | Roberto Abel Martin Del Campo Cardenas | 1-0 | 42 | Open |
| 213 | 2020-11-01 | US Class Master 2020 | Dulles USA | 5 | Joshua Posthuma | Evan Park | 1-0 | 48 | Open |
| 214 | 2020-11-01 | US Class Master 2020 | Dulles USA | 4 | Hans Moke Niemann | Joshua Posthuma | 1-0 | 87 | Open |
| 215 | 2020-11-01 | US Class Master 2020 | Dulles USA | 3 | Andrey Stukopin | Joshua Posthuma | 1/2-1/2 | 27 | Open |
| 216 | 2020-10-31 | US Class Master 2020 | Dulles USA | 2 | Joshua Posthuma | Ryan Amburgy | 1-0 | 30 | Open |
| 217 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 9 | Joshua Posthuma | Peter Svidler | 0-1 | 47 | Open |
| 218 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 8 | Ori Kobo | Joshua Posthuma | 1-0 | 32 | Open |
| 219 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 7 | Maksim Chigaev | Joshua Posthuma | 0-1 | 34 | Open |
| 220 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 6 | Joshua Posthuma | Kevin Bordi | 0-1 | 39 | Open |
| 221 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 5 | Levan Pantsulaia | Joshua Posthuma | 0-1 | 45 | Open |
| 222 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 4 | Joshua Posthuma | Dawid Czerw | 1-0 | 59 | Open |
| 223 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 3 | Joshua Posthuma | Pierre Villegas | 1-0 | 55 | Open |
| 224 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 2 | Nodirbek Abdusattorov | Joshua Posthuma | 1-0 | 43 | Open |
| 225 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 1 | Joshua Posthuma | Paulo Cesar Costa | 1-0 | 49 | Open |
| 226 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 15 | Joshua Posthuma | Pedro Ramon Martinez Reyes | 1-0 | 33 | Open |
| 227 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 14 | Nils Grandelius | Joshua Posthuma | 1-0 | 61 | Open |
| 228 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 13 | Joshua Posthuma | Balazs Csonka | 1-0 | 25 | Open |
| 229 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 12 | Kacper Piorun | Joshua Posthuma | 1-0 | 65 | Open |
| 230 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 11 | Jonathan Carlstedt | Joshua Posthuma | 0-1 | 29 | Open |
| 231 | 2020-10-03 | Speed Chess Super Swiss | chess.com INT | 10 | Joshua Posthuma | Viktor Skliarov | 1-0 | 49 | Open |
| 232 | 2020-09-29 | Titled Tuesday 29th Sept | chess.com INT | 1 | Aziz Degenbaev | Joshua Posthuma | 1-0 | 38 | Open |
| 233 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 9 | Cristi Machidon | Joshua Posthuma | 0-1 | 31 | Open |
| 234 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 7 | Dmitry Goltsev | Joshua Posthuma | 1-0 | 57 | Open |
| 235 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 6 | Joshua Posthuma | Tuan Minh Le | 0-1 | 53 | Open |
| 236 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 5 | Samuel-Timotei Ghimpu | Joshua Posthuma | 0-1 | 15 | Open |
| 237 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 4 | Joshua Posthuma | Juan Cruz Arias | 1-0 | 48 | Open |
| 238 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 3 | Giga Quparadze | Joshua Posthuma | 1-0 | 18 | Open |
| 239 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 2 | Ali Mortazavi | Joshua Posthuma | 0-1 | 52 | Open |
| 240 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 1 | Joshua Posthuma | Vinicius Tine Martins | 1-0 | 64 | Open |
| 241 | 2020-09-22 | Titled Tuesday 22nd Sept | chess.com INT | 10 | Joshua Posthuma | Arghyadip Das | 0-1 | 35 | Open |
| 242 | 2020-04-28 | Titled Tuesday 28th Apr | chess.com INT | 7 | Joshua Posthuma | Erik Obgolts | 0-1 | 29 | Open |
| 243 | 2020-04-28 | Titled Tuesday 28th Apr | chess.com INT | 2 | Quang Liem Le | Joshua Posthuma | 1-0 | 30 | Open |
| 244 | 2020-03-06 | Montreal Winter IM 2020 | Montreal CAN | 9.4 | Raymond Kaufman | Joshua Posthuma | 0-1 | 36 | Open |
| 245 | 2020-03-06 | Montreal Winter IM 2020 | Montreal CAN | 8.3 | Joshua Posthuma | Jason Liang | 1/2-1/2 | 82 | Open |
| 246 | 2020-03-05 | Montreal Winter IM 2020 | Montreal CAN | 7.3 | David Vigorito | Joshua Posthuma | 0-1 | 37 | Open |
| 247 | 2020-03-05 | Montreal Winter IM 2020 | Montreal CAN | 6.4 | Joshua Posthuma | Rohan Talukdar | 1/2-1/2 | 47 | Open |
| 248 | 2020-03-04 | Montreal Winter IM 2020 | Montreal CAN | 5.2 | Justus Williams | Joshua Posthuma | 1-0 | 55 | Open |
| 249 | 2020-03-04 | Montreal Winter IM 2020 | Montreal CAN | 4.5 | Joshua Posthuma | Dagur Ragnarsson | 1-0 | 50 | Open |
| 250 | 2020-03-03 | Montreal Winter IM 2020 | Montreal CAN | 3.1 | Joshua Posthuma | Shawn Rodrigue-Lemieux | 1/2-1/2 | 59 | Open |
| 251 | 2020-03-03 | Montreal Winter IM 2020 | Montreal CAN | 2.5 | Doug Eckert | Joshua Posthuma | 1-0 | 53 | Open |
| 252 | 2020-03-02 | Montreal Winter IM 2020 | Montreal CAN | 1.2 | Joshua Posthuma | Thanh Nha Duong | 0-1 | 78 | Open |
| 253 | 2020-02-23 | Elevate My Chess Feb IM | Oakville CAN | 9.3 | Joshua Posthuma | Jordan Clyde | 1-0 | 30 | Open |
| 254 | 2020-02-23 | Elevate My Chess Feb IM | Oakville CAN | 8.3 | Silas Lund | Joshua Posthuma | 0-1 | 37 | Open |
| 255 | 2020-02-22 | Elevate My Chess Feb IM | Oakville CAN | 7.4 | Joshua Posthuma | Mark Plotkin | 0-1 | 66 | Open |
| 256 | 2020-02-22 | Elevate My Chess Feb IM | Oakville CAN | 6.2 | Nicholas Vettese | Joshua Posthuma | 0-1 | 50 | Open |
| 257 | 2020-02-21 | Elevate My Chess Feb IM | Oakville CAN | 5.1 | Joshua Posthuma | Tangi Migot | 1/2-1/2 | 32 | Open |
| 258 | 2020-02-21 | Elevate My Chess Feb IM | Oakville CAN | 4.1 | Eugene Hua | Joshua Posthuma | 1/2-1/2 | 71 | Open |
| 259 | 2020-02-20 | Elevate My Chess Feb IM | Oakville CAN | 3.5 | Jason Liang | Joshua Posthuma | 1/2-1/2 | 166 | Open |
| 260 | 2020-02-20 | Elevate My Chess Feb IM | Oakville CAN | 2.2 | Joshua Posthuma | Tomas Krnan | 1/2-1/2 | 25 | Open |
| 261 | 2020-02-19 | Elevate My Chess Feb IM | Oakville CAN | 1.2 | Liran Zhou | Joshua Posthuma | 1-0 | 57 | Open |
| 262 | 2019-07-31 | 8th Washington Int 2019 | Rockville USA | 9.9 | Jason Wang | Joshua Posthuma | 0-1 | 59 | Open |
| 263 | 2019-07-30 | 8th Washington Int 2019 | Rockville USA | 7.7 | Jennifer Yu | Joshua Posthuma | 1-0 | 50 | Open |
| 264 | 2019-07-05 | 47th Annual World Open | Philadelphia USA | 5 | Emilio Cordova | Joshua Posthuma | 1/2-1/2 | 11 | Open |
| 265 | 2019-07-04 | 47th Annual World Open | Philadelphia USA | 3 | Yuniesky Quesada Perez | Joshua Posthuma | 1-0 | 35 | Open |
| 266 | 2019-05-27 | 28th Chicago Open 2019 | Chicago USA | 9 | Joshua Posthuma | Gabriel Eidelman | 1-0 | 39 | Open |
| 267 | 2019-05-27 | 28th Chicago Open 2019 | Chicago USA | 8 | Carlos Antonio Hevia Alejano | Joshua Posthuma | 1-0 | 36 | Open |
| 268 | 2019-05-26 | 28th Chicago Open 2019 | Chicago USA | 7 | Joshua Posthuma | Joshua Sheng | 1/2-1/2 | 28 | Open |
| 269 | 2019-05-26 | 28th Chicago Open 2019 | Chicago USA | 6 | Joshua Posthuma | Aiden Zhou | 1-0 | 57 | Open |
| 270 | 2019-05-25 | 28th Chicago Open 2019 | Chicago USA | 5 | Nikola Mitkov | Joshua Posthuma | 1-0 | 59 | Open |
| 271 | 2018-05-28 | 27th Chicago Open 2018 | Chicago USA | 9 | Joshua Posthuma | Nickolas Moore | 1-0 | 26 | Open |
| 272 | 2017-05-28 | 26th Chicago Open 2017 | Chicago USA | 7.2 | Justin Sarkar | Joshua Posthuma | 1-0 | 33 | Open |
| 273 | 2017-05-27 | 26th Chicago Open 2017 | Chicago USA | 4.17 | Michael Song | Joshua Posthuma | 1/2-1/2 | 59 | Open |
| 274 | 2017-05-26 | 26th Chicago Open 2017 | Chicago USA | 3.38 | Joshua Posthuma | Steve Wongso | 1-0 | 27 | Open |
| 275 | 2017-05-26 | 26th Chicago Open 2017 | Chicago USA | 2.4 | Joshua Posthuma | Arthur Guo | 1-0 | 50 | Open |
| 276 | 2017-05-25 | 26th Chicago Open 2017 | Chicago USA | 1.6 | Ruifeng Li | Joshua Posthuma | 1-0 | 59 | Open |
| 277 | 2017-03-05 | Schwarzenegger Open 2017 | Columbus USA | 5 | Joshua Posthuma | James Mills | 1/2-1/2 | 41 | Open |
| 278 | 2017-03-05 | Schwarzenegger Open 2017 | Columbus USA | 4 | Vincent Baker | Joshua Posthuma | 0-1 | 46 | Open |
| 279 | 2017-03-04 | Schwarzenegger Open 2017 | Columbus USA | 3 | Awonder Liang | Joshua Posthuma | 1-0 | 27 | Open |
| 280 | 2017-03-04 | Schwarzenegger Open 2017 | Columbus USA | 2 | Joshua Posthuma | Scott Ramer | 1/2-1/2 | 37 | Open |
| 281 | 2017-03-03 | Schwarzenegger Open 2017 | Columbus USA | 1 | Aryan Balyan | Joshua Posthuma | 0-1 | 34 | Open |
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