Colobong, John
Current rating: 1417
Record: 30-40
| Grand Prix Kyoto 2019 (RNA standard) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 374 | Taga, Arito (1500) | Lost 1-2 | -181436 |
| 2standard | 729 | Okada, Takuya 2317 (1491) | Won 2-0 | +191455 |
| 3standard | 787 | Kitagawa, Tomohiro (1311) | Won 2-0 | +161471 |
| 4standard | 395 | Tanaka, Syunya (1560) | Lost 1-2 | -171454 |
| 5standard | 778 | Tamaru, Daisuke (1428) | Lost 1-2 | -181436 |
| 6standard | 711 | Shimoyama, Kazuma (1388) | Lost 0-2 | -191417 |
| top | average opponent: 1446record: 2-4 | new rating: 1417 | ||
| Grand Prix Shizuoka 2018 (standard) (GRN standard) | starting rating: 1400 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 421 | Takeyama, Maya (1441) | Lost 1-2 | -171383 |
| 2standard | 684 | Emori, Shinichi (1576) | Won 2-0 | +221405 |
| 3standard | 712 | Yin, Hongrui (1669) | Won 2-1 | +221427 |
| 4standard | 568 | Yokoyama, Takaya (1621) | Won 2-1 | +221449 |
| 5standard | 402 | Shimizu, Yuji (1536) | Lost 0-2 | -171432 |
| 6standard | 636 | Kai, Masatoshi (1404) | Won 2-1 | +181450 |
| 7standard | 425 | Tinen, Kousuke (1595) | Lost 0-2 | -161434 |
| 8standard | 498 | Onishi, Akira (1496) | Won 2-1 | +201454 |
| top | average opponent: 1542record: 5-3 | new rating: 1454 | ||
| Grand Prix Shizuoka 2018 (legacy) (legacy) | starting rating: 1385 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 310 | Houseki, Hisayuki (1519) | Lost 0-2 | -161369 |
| 2legacy | 416 | Kawara, Hiroshi (1511) | Lost 0-2 | -151354 |
| 3legacy | 662 | Zhu, Junfei (1465) | Lost 0-2 | -161338 |
| 4legacy | 667 | Higashimura, Kazuya (1426) | Won 2-0 | +201358 |
| 5legacy | 582 | Satou, Ryota (1466) | Won 2-0 | +201378 |
| 6legacy | 501 | Maeda, Yoshitaka (1436) | Won 2-0 | +191397 |
| 7legacy | 348 | Okada, Taro (1548) | Won 2-0 | +201417 |
| 8legacy | 305 | Obata, Koji (1469) | Lost 1-2 | -171400 |
| top | average opponent: 1480record: 4-4 | new rating: 1400 | ||
| Grand Prix Chiba 2018 (M19 limited) | starting rating: 1394 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 469 | Itou, Kuninosuke (1415) | Won 2-0 | +191413 |
| 2sealed | 144 | Iino, Ryuji (1562) | Lost 1-2 | -161397 |
| 3sealed | 722 | Yabata, Kenichi (1499) | Lost 0-2 | -161381 |
| 4sealed | 813 | Takase, Junpei (1486) | Won 2-1 | +201401 |
| 5sealed | 664 | Moriya, Taiki (1508) | Lost 1-2 | -161385 |
| top | average opponent: 1494record: 2-3 | new rating: 1385 | ||
| Grand Prix Chiba 2016 (legacy) | starting rating: 1416 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 129 | Iijima, Shin (1535) | Lost 0-2 | -161400 |
| 4legacy | 443 | Noguchi, Hiromasa (1372) | Won 2-1 | +181418 |
| 5legacy | 460 | Cho, Jeong Woo (1807) | Lost 0-2 | -121406 |
| 6legacy | 496 | Ukyou, Kazuma (1404) | Lost 1-2 | -181388 |
| 7legacy | 791 | Kagami, Gen (1515) | Won 2-1 | +211409 |
| 8legacy | 420 | Takahashi, Daiki (1608) | Lost 1-2 | -151394 |
| top | average opponent: 1540record: 2-4 | new rating: 1394 | ||
| Grand Prix Chiba 2015 (MM2 limited) | starting rating: 1429 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 2218 | Ohtsu, Minami (1454) | Won 2-0 | +181447 |
| 3sealed | 2029 | Seo, Kenta (1535) | Lost 0-2 | -161431 |
| 4sealed | 2254 | Irie, Daiki (1510) | Lost 1-2 | -171414 |
| 5sealed | 2307 | Cole, Lewis (1460) | Won 2-0 | +191433 |
| 6sealed | 2262 | Izawa, Kazuki (1482) | Lost 1-2 | -171416 |
| top | average opponent: 1488record: 2-3 | new rating: 1416 | ||
| Grand Prix Kyoto 2015 (legacy) | starting rating: 1452 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 561 | Yoshioka, Norisato (1539) | Won 2-1 | +201472 |
| 3legacy | 702 | Omori, Wataru (1467) | Won 2-1 | +181490 |
| 4legacy | 567 | Okada, Wataru (1649) | Lost 0-2 | -151475 |
| 5legacy | 641 | Kitamura, Takuya (1512) | Lost 1-2 | -181457 |
| 6legacy | 737 | Miyamoto, Sou (1519) | Lost 0-2 | -171440 |
| 7legacy | 771 | Tawada, Kazuya (1497) | Won 2-1 | +201460 |
| 8legacy | 696 | Kawamata, Norio (1521) | Lost 1-2 | -171443 |
| 9legacy | 697 | Setya, Steven Dirga (1676) | Lost 0-2 | -141429 |
| top | average opponent: 1547record: 3-5 | new rating: 1429 | ||
| Grand Prix Nagoya 2014 (BNG limited) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 534 | Bradford, Chris S (1539) | Lost 0-2 | -171468 |
| 3sealed | 836 | Kousaka, Shinichi (1500) | Lost 0-2 | -181450 |
| 4sealed | 848 | Horiuchi, Taisuke (1469) | Won 2-1 | +191469 |
| 5sealed | 790 | Kuroda, Aki (1503) | Won 2-0 | +181487 |
| 6sealed | 732 | Mathumoto, Naoya (1522) | Lost 0-2 | -171470 |
| 7sealed | 741 | Sasaoka, Hirohito (1482) | Lost 0-2 | -181452 |
| top | average opponent: 1503record: 2-4 | new rating: 1452 | ||
| Grand Prix Shizuoka 2013 (THS standard) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 644 | Ishida, Shoichi (1477) | Lost 1-2 | -181444 |
| 2standard | 727 | Misawa, Kota (1482) | Lost 1-2 | -171427 |
| 3standard | 877 | Dapat, Clyde (1349) | Lost 1-2 | -201407 |
| 4standard | 905 | Yamashita, Hiroshi (1448) | Lost 1-2 | -171390 |
| 5standard | 891 | Osuga, Hiroaki (1433) | Won 2-0 | +191409 |
| 6standard | 843 | Tani, Chiharu (1448) | Won 2-1 | +191428 |
| 7standard | 779 | Matsubara, Tohru (1542) | Won 2-1 | +201448 |
| 8standard | 733 | Ehara, Daisuke (1480) | Won 2-0 | +181466 |
| 9standard | 791 | Koizumi, Hiroki (1499) | Won 2-1 | +191485 |
| top | average opponent: 1462record: 5-4 | new rating: 1485 | ||
| Grand Prix Yokohama 2013 (GTC limited) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 127 | Satou, Chika (1531) | Won 2-1 | +191508 |
| 3sealed | 61 | Taya, Kentaro (1567) | Lost 0-2 | -171491 |
| 4sealed | 161 | Shimizu, Naoki (1843) | Lost 0-2 | -121479 |
| 5sealed | 283 | Mizuno, Nobuyoshi (1520) | Lost 1-2 | -171462 |
| top | average opponent: 1615record: 1-3 | new rating: 1462 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 132 | Butler, Thomas (1533) | Lost 1-2 | -171483 |
| 5sealed | 169 | Garcia, Andrew (1535) | Won 2-0 | +191502 |
| 6sealed | 107 | Humphreys, Richard (1499) | Won 2-1 | +181520 |
| 7sealed | 62 | Jackson, Allen (1792) | Lost 0-2 | -141506 |
| 8sealed | 145 | Holzworth, Michael (1545) | Lost 1-2 | -171489 |
| top | average opponent: 1581record: 2-3 | new rating: 1489 | ||