Berka, David
Current rating: 1508
Record: 17-18-1
| Grand Prix Shizuoka 2015 (KTK limited) | starting rating: 1480 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 368 | Takeshita, Yuuki (1500) | Won 2-0 | +191499 |
| 2sealed | 218 | Matsumura, Takehiko (1460) | Won 2-1 | +171516 |
| 3sealed | 125 | Karita, Toyohisa (1501) | Won 2-1 | +181534 |
| 4sealed | 91 | Zhang, Meng Qiu (2015) | Lost 0-2 | -101524 |
| 5sealed | 66 | Higuchi, Makoto (1635) | Lost 0-2 | -161508 |
| 6sealed | 152 | Ogawa, Ryou (1683) | Won 2-0 | +211529 |
| 7sealed | 189 | Ikeda, Naoto (1336) | Lost 0-2 | -221507 |
| 8sealed | 201 | Adachi, Ryosuke (1524) | Lost 0-2 | -171490 |
| 9sealed | 174 | Jinbo, Takashi (1482) | Won 2-1 | +181508 |
| top | average opponent: 1571record: 5-4 | new rating: 1508 | ||
| Grand Prix Manila 2015 (KTK standard) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 545 | Mendoza, Norbie (1500) | Won 2-1 | +181491 |
| 2standard | 221 | Salay, Raymond (1529) | Won 2-0 | +191510 |
| 3standard | 99 | Balot, Eugene Patrick (1520) | Lost 0-2 | -181492 |
| 4standard | 360 | Vicencio, Wyngard (1517) | Draw 1-1 | +11493 |
| 5standard | 245 | Chua, Jeremiah (1657) | Won 2-0 | +211514 |
| 6standard | 160 | Tud, Joshua (1591) | Lost 0-2 | -171497 |
| 7standard | 266 | Cequina, Japoi (1517) | Lost 1-2 | -171480 |
| 8standard | 338 | Macaranas, John (1501) | Won 2-0 | +181498 |
| 9standard | 228 | Regalado, Franco Antonio (1517) | Lost 1-2 | -181480 |
| top | average opponent: 1539record: 4-4-1 | new rating: 1480 | ||
| Grand Prix Strasbourg 2014 (KTK limited) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 59 | Coissin, Jeremie (1518) | Won 2-1 | +191507 |
| 3sealed | 134 | van Oene, Cedric (1467) | Lost 1-2 | -191488 |
| 4sealed | 235 | de Jonge, Rob (1478) | Won 2-1 | +181506 |
| 5sealed | 175 | Beck, Daniel (1538) | Lost 0-2 | -181488 |
| 6sealed | 226 | Fenton, Christopher (1420) | Lost 1-2 | -191469 |
| 7sealed | 229 | Escudero Mendoza, Enrique (1615) | Won 2-0 | +211490 |
| 8sealed | 182 | Nienhaus, Jens (1565) | Lost 1-2 | -171473 |
| top | average opponent: 1514record: 3-4 | new rating: 1473 | ||
| Grand Prix Prague 2011 (NPH limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 578 | Suurna, Reivo (1501) | Lost 1-2 | -181464 |
| 2sealed | 664 | Abed, Arasch (1559) | Won 2-0 | +201484 |
| 3sealed | 678 | Wolder, Claus Bo (1499) | Won 2-1 | +181502 |
| 4sealed | 683 | Gajewski, Michal (1577) | Lost 1-2 | -161486 |
| 5sealed | 641 | Nemeth, Laszlo (1420) | Won 2-0 | +161502 |
| 6sealed | 624 | Bailly-Maitre, Gael (1704) | Lost 0-2 | -141488 |
| top | average opponent: 1543record: 3-3 | new rating: 1488 | ||
| Grand Prix Prague 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 65 | Kramel, Jiri (1500) | Won 2-1 | +181518 |
| 2sealed | 65 | Schmittbuettner, Markus (1404) | Lost 0-2 | -201498 |
| 3sealed | 65 | Andrzejewski, Jakub (1485) | Won 2-1 | +181516 |
| 4sealed | 65 | Hajnisz, Aleksander (1633) | Lost 0-2 | -161500 |
| 5sealed | 65 | Gruschevoi, Kirill (1500) | Lost 0-2 | -181482 |
| top | average opponent: 1504record: 2-3 | new rating: 1482 | ||