Kostelny, Martin
Current rating: 1328
Record: 7-18-2
| Grand Prix Krakow 2015 (DTK standard) | starting rating: 1331 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 233 | Klimek, Jakub (1545) | Won 2-0 | +221353 |
| 2standard | 119 | Mioe, Maciej (1517) | Lost 0-2 | -151338 |
| 3standard | 412 | LI, MIN (1501) | Lost 0-2 | -151323 |
| 4standard | 65 | Zubovich, Stanislau (1465) | Won 2-0 | +201343 |
| 5standard | 432 | Csente, David (1471) | Lost 0-2 | -151328 |
| top | average opponent: 1500record: 2-3 | new rating: 1328 | ||
| Grand Prix Strasbourg 2014 (KTK limited) | starting rating: 1337 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 927 | Pieters, Yorick (1669) | Lost 1-2 | -121325 |
| 2sealed | 943 | Buhler, Friedel (1482) | Draw 1-1 | +31328 |
| 3sealed | 1113 | Michon, Christophe (1485) | Won 2-0 | +211349 |
| 4sealed | 1027 | Demots, Antoine (1376) | Lost 0-2 | -181331 |
| top | average opponent: 1503record: 1-2-1 | new rating: 1331 | ||
| Grand Prix Vienna 2014 (BNG limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 21 | Jakobsmeyer, Tim (1500) | Draw 1-1 | +11447 |
| 2sealed | 284 | Abraham, Daniel (1416) | Lost 0-2 | -191428 |
| 3sealed | 481 | Pashley, Stephen (1375) | Lost 1-2 | -191409 |
| 4sealed | 540 | Kiss, Jan (1462) | Lost 1-2 | -171392 |
| 5sealed | 517 | Deleuran Poulsen, Emil (1429) | Lost 1-2 | -171375 |
| 6sealed | 473 | Ben-Yami, Jotham (1410) | Lost 0-2 | -181357 |
| 7sealed | 422 | Zorner, Mathias (1395) | Won 2-1 | +191376 |
| 8sealed | 370 | Aigner, Peter (1186) | Lost 1-2 | -211355 |
| 9sealed | 330 | Hruska, Jakub (1370) | Lost 1-2 | -181337 |
| top | average opponent: 1394record: 1-7-1 | new rating: 1337 | ||
| Grand Prix Vienna 2013 (THS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 86 | Thomas, Michael [ENG] (1500) | Lost 0-2 | -181482 |
| 2standard | 348 | Portele, Patrick (1462) | Lost 1-2 | -181464 |
| 3standard | 648 | Kotzurek, Jaromir (1464) | Won 2-1 | +181482 |
| 4standard | 568 | Streith, Roman (1486) | Won 2-1 | +181500 |
| 5standard | 519 | Eberharter, Daniel (1491) | Lost 1-2 | -181482 |
| 6standard | 482 | Quercetani, Massimiliano (1535) | Lost 1-2 | -171465 |
| 7standard | 517 | Krenn, Marcel (1466) | Lost 0-2 | -181447 |
| 8standard | 484 | Nawrocka, Justyna (1451) | Lost 0-2 | -181429 |
| 9standard | 430 | Tschernegg, Thomas (1379) | Won 2-0 | +171446 |
| top | average opponent: 1470record: 3-6 | new rating: 1446 | ||