Joshua Posthuma
Country
USA
Birth Year
2000
Gender
M
Title
International Master
FIDE ID
2096889
USCF ID
13856778
USCF Rating
2465
FIDE rating history
View rating lists
USCF rating history
View rating lists
Available Games
Published games available in our archive; coverage varies by tournament. Archive last checked: 2026-10-07 (UTC).
| # | Date | Event | Site | Round | White | Black | Result | Moves | View |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2026-08-09 | 126th US Open 2026 | Grand Rapids, MI USA | 9.9 | Alvarez Albo,Ch | Posthuma,Joshua | 0-1 | 57 | Open |
| 2 | 2026-08-08 | 126th US Open 2026 | Grand Rapids, MI USA | 8.18 | Karthik,Aarav | Posthuma,Joshua | 0-1 | 58 | Open |
| 3 | 2026-05-24 | 35th Chicago Open 2026 | Chicago USA | 6.21 | Posthuma,Joshua | Sam,Gabriel | 1/2-1/2 | 79 | Open |
| 4 | 2026-05-23 | 35th Chicago Open 2026 | Chicago USA | 5.5 | Jacobson,Brandon | Posthuma,Joshua | 1-0 | 49 | Open |
| 5 | 2026-05-23 | 35th Chicago Open 2026 | Chicago USA | 4.9 | Posthuma,Joshua | Sonis,Francesco | 1/2-1/2 | 32 | Open |
| 6 | 2025-11-30 | US Chess Masters 2025 | Charlotte USA | 8.21 | Joshua Posthuma | Luka Budisavljevic | 1/2-1/2 | 47 | Open |
| 7 | 2025-11-28 | US Chess Masters 2025 | Charlotte USA | 4.18 | Yair Parkhov | Joshua Posthuma | 1-0 | 40 | Open |
| 8 | 2025-08-06 | Royal City Masters 2025 | Guelph CAN | 9.4 | Joshua Posthuma | Edward Song | 1/2-1/2 | 35 | Open |
| 9 | 2025-08-05 | Royal City Masters 2025 | Guelph CAN | 8.1 | Toms Kantans | Joshua Posthuma | 1-0 | 40 | Open |
| 10 | 2025-08-05 | Royal City Masters 2025 | Guelph CAN | 7.5 | Larry Yang | Joshua Posthuma | 0-1 | 40 | Open |
| 11 | 2025-08-04 | Royal City Masters 2025 | Guelph CAN | 6.4 | Joshua Posthuma | Raja Panjwani | 1/2-1/2 | 36 | Open |
| 12 | 2025-08-03 | Royal City Masters 2025 | Guelph CAN | 5.7 | Joshua Posthuma | Luis Manuel Perez Rodriguez | 1-0 | 47 | Open |
| 13 | 2025-08-03 | Royal City Masters 2025 | Guelph CAN | 4.11 | Koosha Jaferian | Joshua Posthuma | 0-1 | 24 | Open |
| 14 | 2025-08-02 | Royal City Masters 2025 | Guelph CAN | 3.4 | Nikolay Noritsyn | Joshua Posthuma | 1-0 | 79 | Open |
| 15 | 2025-08-02 | Royal City Masters 2025 | Guelph CAN | 2.1 | Joshua Posthuma | Jesse Ren | 1-0 | 48 | Open |
| 16 | 2025-07-13 | Marshall Summer Inv GMA | New York USA | 9.1 | Viktor Matviishen | Joshua Posthuma | 1/2-1/2 | 15 | Open |
| 17 | 2025-07-12 | Marshall Summer Inv GMA | New York USA | 8.1 | Joshua Posthuma | Joseph Zeltsan | 1-0 | 31 | Open |
| 18 | 2025-07-12 | Marshall Summer Inv GMA | New York USA | 7.1 | Kyron Griffith | Joshua Posthuma | 1-0 | 49 | Open |
| 19 | 2025-07-11 | Marshall Summer Inv GMA | New York USA | 6.1 | Joshua Posthuma | Samrug Narayanan | 0-1 | 53 | Open |
| 20 | 2025-07-10 | Marshall Summer Inv GMA | New York USA | 5.1 | Eddy Tian | Joshua Posthuma | 1/2-1/2 | 29 | Open |
| 21 | 2025-07-10 | Marshall Summer Inv GMA | New York USA | 4.1 | Joshua Posthuma | Emilio Cordova | 1-0 | 41 | Open |
| 22 | 2025-07-09 | Marshall Summer Inv GMA | New York USA | 3.1 | Luis Carlos Torres Rosas | Joshua Posthuma | 0-1 | 49 | Open |
| 23 | 2025-07-09 | Marshall Summer Inv GMA | New York USA | 2.1 | Joshua Posthuma | Robby Kevlishvili | 0-1 | 59 | Open |
| 24 | 2025-07-08 | Marshall Summer Inv GMA | New York USA | 1.1 | Liam Putnam | Joshua Posthuma | 1/2-1/2 | 27 | Open |
| 25 | 2024-09-14 | FSGM September 2024 | Budapest HUN | 9.3 | Joshua Posthuma | Edoardo Di Benedetto | 1/2-1/2 | 30 | Open |
| 26 | 2024-09-13 | FSGM September 2024 | Budapest HUN | 8.3 | Valeriy Neverov | Joshua Posthuma | 1-0 | 49 | Open |
| 27 | 2024-09-12 | FSGM September 2024 | Budapest HUN | 7.4 | Joshua Posthuma | Marco Dobrikov | 0-1 | 49 | Open |
| 28 | 2024-09-12 | FSGM September 2024 | Budapest HUN | 6.2 | Sai Krishna G V | Joshua Posthuma | 1-0 | 39 | Open |
| 29 | 2024-09-11 | FSGM September 2024 | Budapest HUN | 5.5 | Joshua Posthuma | Lajos Seres | 1-0 | 43 | Open |
| 30 | 2024-09-10 | FSGM September 2024 | Budapest HUN | 4.1 | Khamparia Akshat | Joshua Posthuma | 1-0 | 72 | Open |
| 31 | 2024-09-09 | FSGM September 2024 | Budapest HUN | 3.5 | Emin Ohanyan | Joshua Posthuma | 1/2-1/2 | 59 | Open |
| 32 | 2024-09-08 | FSGM September 2024 | Budapest HUN | 2.2 | Joshua Posthuma | Sathvik Adiga | 1/2-1/2 | 74 | Open |
| 33 | 2024-09-07 | FSGM September 2024 | Budapest HUN | 1.4 | Selim Citak | Joshua Posthuma | 1/2-1/2 | 77 | Open |
| 34 | 2024-09-05 | Vezerkepzo GM Kluger Mem | Budapest HUN | 9.2 | Adithya A Chullikkad | Joshua Posthuma | 0-1 | 21 | Open |
| 35 | 2024-09-04 | Vezerkepzo GM Kluger Mem | Budapest HUN | 8.5 | Joshua Posthuma | Sai Krishna G V | 1/2-1/2 | 77 | Open |
| 36 | 2024-09-03 | Vezerkepzo GM Kluger Mem | Budapest HUN | 7.1 | Joshua Posthuma | Felix Xie | 1-0 | 54 | Open |
| 37 | 2024-09-02 | Vezerkepzo GM Kluger Mem | Budapest HUN | 6.5 | Tamas Jr. Fodor | Joshua Posthuma | 1-0 | 34 | Open |
| 38 | 2024-09-01 | Vezerkepzo GM Kluger Mem | Budapest HUN | 5.2 | Joshua Posthuma | Sathvik Adiga | 0-1 | 66 | Open |
| 39 | 2024-08-30 | Vezerkepzo GM Kluger Mem | Budapest HUN | 4.4 | Endre Csiki | Joshua Posthuma | 1-0 | 51 | Open |
| 40 | 2024-08-30 | Vezerkepzo GM Kluger Mem | Budapest HUN | 3.3 | Joshua Posthuma | Roberto Garcia Pantoja | 1-0 | 54 | Open |
| 41 | 2024-08-29 | Vezerkepzo GM Kluger Mem | Budapest HUN | 2.3 | Jose Gabriel Cardoso Cardoso | Joshua Posthuma | 1-0 | 49 | Open |
| 42 | 2024-08-28 | Vezerkepzo GM Kluger Mem | Budapest HUN | 1.4 | Joshua Posthuma | Levente Papp | 1/2-1/2 | 52 | Open |
| 43 | 2024-08-20 | Budapest 1 Week Aug GMA | Budapest HUN | 9.1 | Misa Pap | Joshua Posthuma | 1/2-1/2 | 80 | Open |
| 44 | 2024-08-19 | Budapest 1 Week Aug GMA | Budapest HUN | 8.1 | Joshua Posthuma | Sahaj Grover | 1-0 | 40 | Open |
| 45 | 2024-08-18 | Budapest 1 Week Aug GMA | Budapest HUN | 7.1 | Artem Tyurin | Joshua Posthuma | 1/2-1/2 | 64 | Open |
| 46 | 2024-08-18 | Budapest 1 Week Aug GMA | Budapest HUN | 6.1 | Joshua Posthuma | Sultan Chubakov | 1-0 | 29 | Open |
| 47 | 2024-08-17 | Budapest 1 Week Aug GMA | Budapest HUN | 5.1 | Azarya Jodi Setyaki | Joshua Posthuma | 1/2-1/2 | 74 | Open |
| 48 | 2024-08-16 | Budapest 1 Week Aug GMA | Budapest HUN | 4.1 | Joshua Posthuma | Vuk Damjanovic | 0-1 | 47 | Open |
| 49 | 2024-08-16 | Budapest 1 Week Aug GMA | Budapest HUN | 3.1 | Ferenc Jr. Gombocz | Joshua Posthuma | 1/2-1/2 | 64 | Open |
| 50 | 2024-08-15 | Budapest 1 Week Aug GMA | Budapest HUN | 2.1 | Joshua Posthuma | Huynh Minh Huy Nguyen | 0-1 | 44 | Open |
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