| Tournament | Round | Khwanjai Thammaping | Barry Harridge |
| 07.05.2006 Matchplay Qualifier (VIC) | 4 | 323 | 480 |
| 06.01.2007 Marathon (VIC) | 22 | 349 | 394 |
| 12.01.2008 24 Hour Marathon (VIC) | 3 | 363 | 429 |
| 19.05.2019 Scrabble Generations (VIC) | 2 | 361 | 411 |
| 28.12.2025 Decathon 2025 (VIC) | 2 | 373 | 424 |
| Head-to-head after 5 games | 0 | 5 | |
| Average score | 353.8 | 427.6 | |
| Spread: | -369 | 369 | |