| 2342.6 | 2254.5 | 16 | 16 | Dinham, J (James) | NM | NBR | 2130.6 | 2048.6 | Rustique Chess Challenge 2026 (Rapid Platinum) | 4 | 2026-07-01 | R | B | 1 | 0.68 | 0.32 | 1.4 | 0.77 | 0.23 | 1.7 |
| 2342.6 | 2269.1 | 16 | 16 | Dinham, J (James) | NM | NBR | 2130.6 | 2069.4 | Rustique Chess Challenge 2026 (Blitz) | 4 | 2026-07-01 | B | B | 0.5 | 0.68 | -0.18 | -0.5 | 0.69 | -0.19 | -3 |
| 2293.6 | 2254.2 | 16 | 16 | Dinham, J (James) | NM | NBR | 2204.9 | 1964.4 | 3rd KHELO INDIA - LCA Chess Tournament 2026 (Blitz) | 4 | 2026-04-18 | B | B | 0.5 | 0.56 | -0.06 | -0.2 | 0.8 | -0.3 | -4.7 |
| 2293.6 | 2306.1 | 16 | 16 | Dinham, J (James) | NM | NBR | 2204.9 | 2215.4 | Eastern Cape Open 2026 (Open) | 5 | 2026-04-11 | S | B | 1 | 0.56 | 0.44 | 6.6 | 0.56 | 0.44 | 7 |
| 2278 | 2284.3 | 16 | 16 | Dinham, J (James) | NM | NBR | 2163.7 | 2175.2 | Chess Power House Boksburg Open 2026 (Prestige) | 5 | 2026-03-13 | S | B | 0 | 0.59 | -0.59 | -7.9 | 0.59 | -0.59 | -9.4 |
| 2278 | 2284.3 | 16 | 16 | Dinham, J (James) | NM | NBR | 2163.7 | 2175.2 | 2026 South African Closed Chess Championships (Open) | 2 | 2026-02-21 | S | W | 0 | 0.67 | -0.67 | -10.8 | 0.67 | -0.67 | -10.7 |
| 2288.6 | 2294.6 | 20 | 20 | Dinham, J (James) | RM | NBR | 2176.7 | 2194.2 | Chess Power House Aug Open 2025 (Prestige) | 4 | 2025-08-16 | S | B | 0.5 | 0.59 | -0.09 | -1.5 | 0.58 | -0.08 | -1.6 |
| 2272.5 | 2276.4 | 20 | 20 | Dinham, J (James) | RM | NBR | 2133.6 | 2151.5 | South African Open 2025 (Championship) | 3 | 2025-06-29 | S | B | 0.5 | 0.62 | -0.12 | -2.4 | 0.6 | -0.1 | -2 |
| 2272.6 | 2283 | 20 | 20 | Dinham, J (James) | RM | NBR | 2130.2 | 2145.7 | 2025 JMCA Open Chess Tournament (A) | 3 | 2025-06-07 | S | W | 1 | 0.71 | 0.29 | 4.8 | 0.7 | 0.3 | 6 |
| 2269.2 | 2270.5 | 20 | 20 | Dinham, J (James) | RM | NBR | 2006.8 | 2022.5 | Mzansi Africa Classic 2025 (Expert) | 1 | 2025-05-17 | S | B | 1 | 0.76 | 0.24 | 4 | 0.75 | 0.25 | 5 |
| 2269.2 | 2264.2 | 20 | 20 | Dinham, J (James) | RM | NBR | 2006.8 | 1875.3 | Moja Chess Extravaganza 2025 (Blitz) | 7 | 2025-04-26 | B | W | 1 | 0.85 | 0.15 | 0.5 | 0.99 | 0.01 | 0.2 |
| 2269.2 | 2270.5 | 20 | 20 | Dinham, J (James) | RM | NBR | 2006.8 | 2022.5 | JMC Crawford Sandton 2025 (A) | 2 | 2025-05-10 | S | B | 1 | 0.76 | 0.24 | 4 | 0.75 | 0.25 | 5 |
| 2293.2 | 2306.9 | 20 | 20 | Dinham, J (James) | | NBR | 2003.5 | 2018.5 | MCA Summer March 2025 (Expert) | 1 | 2025-03-08 | S | B | 1 | 0.8 | 0.2 | 3.3 | 0.79 | 0.21 | 4.2 |
| 2236.4 | 2221.4 | 20 | 20 | Dinham, J (James) | | GE | 2011.4 | 2033.5 | South African Open Chess Championship 2024 (A) | 9 | 2024-07-06 | S | W | 0.5 | 0.8 | -0.3 | -6 | 0.76 | -0.26 | -5.2 |
| 2236.4 | 2271.9 | 20 | 20 | Dinham, J (James) | | GE | 2011.4 | 1830.7 | South African Open Chess Championship 2024 (Blitz) | 5 | 2024-07-04 | B | W | 0 | 0.8 | -0.8 | -2.9 | 1 | -1 | -20 |
| 2250.7 | 2226 | 20 | 20 | Dinham, J (James) | | GE | 2017 | 2041.9 | Chess Power House June Open 2024 (A) | 2 | 2024-06-23 | S | W | 1 | 0.81 | 0.19 | 3.2 | 0.76 | 0.24 | 4.8 |
| 2181.3 | 2183.8 | 20 | 20 | Dinham, J (James) | | GE | 1929.1 | 1915.2 | 2023 Moja Chess Extravaganza (Prestige) | 7 | 2023-10-03 | S | W | 1 | 0.84 | 0.16 | 3.2 | 0.85 | 0.15 | 3 |
| 2155.8 | 2053.9 | 20 | 20 | Dinham, J (James) | | GE | 1886.8 | 1632 | Mzansi Rapid 2023 (Advanced) | 6 | 2023-02-04 | R | B | 1 | 0.77 | 0.23 | 2.5 | 0.95 | 0.05 | 1 |
| 2190.7 | 1947.8 | 20 | 20 | Dinham, J (James) | | GE | 1941.4 | 1475.3 | South African Open 2022 (Blitz) | 10 | 2022-07-14 | B | W | 1 | 0.83 | 0.17 | 0.6 | 1 | 0 | 0 |
| 2105.7 | 2108.6 | 20 | 20 | Dinham, J (James) | | GE | 1954.1 | 1957.4 | Piet Robertse 2022 (A) | 5 | 2022-02-05 | S | B | 1 | 0.63 | 0.37 | 6.1 | 0.63 | 0.37 | 7.4 |
| 2134.5 | 2134.6 | 20 | 20 | Dinham, J (James) | | GE | 1915.2 | 1914 | Pinnacle College Waterfall Open (Premier) | 2 | 2021-10-02 | S | W | 0.5 | 0.8 | -0.3 | -5.6 | 0.8 | -0.3 | -6 |
| 2015.6 | 1977.4 | 20 | 20 | Dinham, J (James) | | GE | 1731 | 1732.8 | 2019 South African Junior Team Championships (U18B) | 5 | 2020-01-06 | S | W | 0.5 | 0.87 | -0.37 | -7.4 | 0.83 | -0.33 | -6.6 |
| 1830.4 | 1842.7 | 20 | 20 | Dinham, J (James) | | GE | 1390.9 | 1381.9 | 2018 South African Junior Closed Chess Championships (U16 Open) | 9 | 2018-04-06 | S | B | 1 | 0.97 | 0.03 | 0.6 | 0.99 | 0.01 | 0.2 |
| 1786 | 1786 | 20 | 20 | Dinham, J (James) | | GE | 1458.2 | 1458.2 | South African Junior Blitz 2017 Championships (A) | 3 | 2018-01-07 | B | W | 1 | 0.92 | 0.08 | 0.3 | 0.92 | 0.08 | 1.6 |
| 1321 | 1321 | 20 | 20 | Dinham, J (James) | | GE | 1272 | 1272 | South African Junior Team Championships 2016 (U14 B) | 3 | 2016-12-17 | S | B | 1 | 0.57 | 0.43 | 8.6 | 0.43 | 0.57 | 11.4 |
