Sarpphaitoon, Suppachai
Current rating: 1505
Record: 28-33
| Grand Prix Bangkok 2019 (ELD limited) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 119 | Furusawa, Shu (1926) | Lost 0-2 | -111474 |
| 4sealed | 243 | Lee, Wing Tat (1572) | Won 2-1 | +201494 |
| 5sealed | 150 | Wang, Alfred (1678) | Lost 0-2 | -151479 |
| 6sealed | 173 | Park, Min Young (1609) | Won 2-1 | +211500 |
| 7sealed | 89 | Shunglor, Pakpoom (1628) | Won 2-1 | +201520 |
| 8sealed | 69 | Matsumoto, Masataka (1714) | Lost 1-2 | -151505 |
| top | average opponent: 1688record: 3-3 | new rating: 1505 | ||
| Grand Prix Kuala Lumpur 2014 (THS limited) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 84 | Loh, Chuan Han (1692) | Lost 0-2 | -141489 |
| 2sealed | 292 | Koh, Kee Leong (1355) | Won 2-1 | +151504 |
| 3sealed | 272 | Yii, Terh Kuen (1643) | Lost 1-2 | -151489 |
| 4sealed | 385 | Wun, Edwin Wu Choon (1376) | Won 2-1 | +161505 |
| 5sealed | 338 | Tunporn, Chattarin (1378) | Lost 0-2 | -201485 |
| top | average opponent: 1489record: 2-3 | new rating: 1485 | ||
| Grand Prix Bangkok 2013 (DGM limited) | starting rating: 1432 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 69 | Sirilertvorakul, Veerapat (1846) | Won 2-0 | +261458 |
| 3sealed | 15 | Techarattanakrai, Trichai (1569) | Won 2-1 | +201478 |
| 4sealed | 9 | Lei, Qiang (1655) | Won 2-0 | +211499 |
| 5sealed | 21 | Beaumer, Michael (1646) | Lost 0-2 | -161483 |
| 6sealed | 37 | Ismail, Zulkifli (1666) | Won 2-1 | +221505 |
| 7sealed | 16 | Abe, Motoki (1721) | Lost 1-2 | -141491 |
| 8sealed | 100 | Chaovarindr, Thirawat (1513) | Won 2-1 | +181509 |
| 9sealed | 73 | Maglantay, Ranier (1567) | Won 2-1 | +191528 |
| 10draft | 29 | Withtayasat, Assawin (1609) | Won 2-1 | +201548 |
| 11draft | 28 | Tantha-Obhas, Akrapol (1607) | Lost 1-2 | -171531 |
| 12draft | 32 | Lei, Qiang (1663) | Lost 1-2 | -161515 |
| 13draft | 43 | Young, Ryan (1623) | Won 2-0 | +201535 |
| 14draft | 17 | Steinaa, Peter (1789) | Lost 1-2 | -131522 |
| 15draft | 42 | Rojprasertsudh, Vahcin (1513) | Lost 0-2 | -191503 |
| top | average opponent: 1642record: 8-6 | new rating: 1503 | ||
| Grand Prix Singapore 2013 (RTR limited) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 159 | Han, Chin Yao (1575) | Won 2-0 | +201475 |
| 3sealed | 266 | Mohamed Kamal, Khairul (1499) | Won 2-0 | +181493 |
| 4sealed | 24 | Semura, Junichi (1456) | Lost 0-2 | -181475 |
| 5sealed | 175 | Lim, Tanna (1535) | Won 2-1 | +191494 |
| 6sealed | 101 | Lee, Chao Hsien (1552) | Lost 1-2 | -171477 |
| 7sealed | 128 | Kee, Eng Long Christopher (1535) | Lost 1-2 | -171460 |
| 8sealed | 148 | Chen, Liang (1775) | Lost 0-2 | -131447 |
| 9sealed | 185 | Siew, Han Liang (1620) | Lost 1-2 | -151432 |
| top | average opponent: 1568record: 3-5 | new rating: 1432 | ||
| Grand Prix Shanghai 2012 (M13 limited) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 116 | Yu, Song (1500) | Lost 1-2 | -171451 |
| 2sealed | 217 | Chen, Ziqi (1430) | Won 2-0 | +171468 |
| 3sealed | 161 | Xu, Fei (1500) | Lost 1-2 | -171451 |
| 4sealed | 305 | Deng, Jun (1547) | Lost 0-2 | -171434 |
| 5sealed | 338 | Wu, Bingjie (1464) | Won 2-1 | +191453 |
| 6sealed | 273 | Wang, Chuntao (1481) | Lost 1-2 | -171436 |
| 7sealed | 266 | Zhu, Mingshuai (1462) | Won 2-0 | +181454 |
| 8sealed | 217 | Zhang, Ying (1480) | Won 2-0 | +181472 |
| 9sealed | 155 | Han, Xiaochen (1481) | Lost 1-2 | -171455 |
| top | average opponent: 1483record: 4-5 | new rating: 1455 | ||
| Grand Prix Kuala Lumpur 2012 (DKA standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 88 | Sung, Terence S (1485) | Lost 1-2 | -191482 |
| 2standard | 166 | Tan, Wei Sau Johnathan (1448) | Won 2-1 | +181500 |
| 3standard | 209 | Myllynen, Teemu (1502) | Lost 0-2 | -181482 |
| 4standard | 240 | Indrakesuma, Taufik (1710) | Lost 1-2 | -141468 |
| top | average opponent: 1536record: 1-3 | new rating: 1468 | ||
| Grand Prix Bangkok 2009 (M10 limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 42 | Boonsil, Jedsada (1500) | Won 2-0 | +181483 |
| 2sealed | 12 | Donahoe, Chris (1627) | Won 2-0 | +211504 |
| 3sealed | 60 | Likisuliya, Sumphan (1463) | Won 2-0 | +171521 |
| 4sealed | 20 | Sakai, Yoshitoki (1633) | Won 2-1 | +201541 |
| 5sealed | 20 | Ootsuka, Koutarou (2159) | Lost 0-2 | -81533 |
| 6sealed | 71 | Leong, Ding Yuan (1809) | Lost 1-2 | -131520 |
| 7sealed | 88 | Tsai, Miller Ming Yi (1451) | Lost 0-2 | -191501 |
| top | average opponent: 1663record: 4-3 | new rating: 1501 | ||
| Grand Prix Bangkok 2007 (LRW limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 21 | Saethang, Chatchai (1535) | Lost 1-2 | -171483 |
| 2sealed | 85 | Piamrasri, Chomron (1465) | Lost 1-2 | -191464 |
| 3sealed | 102 | Pandee, Nuttawat (1482) | Lost 0-2 | -171447 |
| 4sealed | 148 | Sangtoawtim, Nontawat (1445) | Won 2-0 | +181465 |
| 5sealed | 139 | Khemaphanit, Sinchai (1464) | Lost 0-2 | -181447 |
| 6sealed | 129 | Khunmuang, Thanajet (1445) | Lost 0-2 | -181429 |
| 7sealed | 113 | Laoharuangrongkul, Tha (1427) | Won 2-0 | +181447 |
| 8sealed | 97 | Gauthier, Maxim (1446) | Won 2-1 | +181465 |
| top | average opponent: 1464record: 3-5 | new rating: 1465 | ||