Pietikainen, Viljami
Current rating: 1553
Record: 23-20-1
| Grand Prix Bangkok 2019 (ELD limited) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 22 | Arunrattananukul, Chakrit (1446) | Draw 1-1 | -11538 |
| 2sealed | 176 | Toh, Rui Huang (1552) | Lost 0-1 | -181520 |
| 3sealed | 329 | Feng, Wei (1766) | Lost 1-2 | -141506 |
| 4sealed | 357 | Promtangtrakul, Chatchai (1464) | Won 2-0 | +181524 |
| 5sealed | 303 | Jang, Hyun-il (1464) | Lost 1-2 | -191505 |
| 6sealed | 283 | Thongmee, Wikanes (1432) | Won 2-0 | +161521 |
| 7sealed | 219 | Hu, Guangzheng (1421) | Won 2-0 | +161537 |
| 8sealed | 163 | Qian, Zhengrui (1400) | Won 2-0 | +161553 |
| top | average opponent: 1493record: 4-3-1 | new rating: 1553 | ||
| Grand Prix Strasbourg 2019 (RNA limited) | starting rating: 1538 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 394 | Kunzler, Gabriel (1500) | Won 2-0 | +171555 |
| 2sealed | 126 | Mellado, Pierre Antoine (1439) | Won 2-1 | +161571 |
| 3sealed | 243 | Gil, Karel (1530) | Won 2-0 | +171588 |
| 4sealed | 39 | Cohen, Brendan (1858) | Lost 1-2 | -131575 |
| 5sealed | 330 | Behrens, Kai (1776) | Lost 0-2 | -141561 |
| 6sealed | 270 | Fontaine, Jerome (1453) | Lost 1-2 | -201541 |
| 7sealed | 374 | Leadley, Alexandre (1506) | Won 2-0 | +171558 |
| 8sealed | 311 | Vanel, Julien (1523) | Lost 0-2 | -191539 |
| top | average opponent: 1573record: 4-4 | new rating: 1539 | ||
| Grand Prix Warsaw 2018 (GRN limited) | starting rating: 1583 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 58 | Staelens, Kenney (1500) | Lost 0-2 | -201563 |
| 2sealed | 606 | Hartmann, Michael (1578) | Won 2-0 | +181581 |
| 3sealed | 660 | Sanz, Alex (1288) | Lost 0-2 | -231558 |
| 4sealed | 737 | Diserud, Oystein (1427) | Lost 1-2 | -201538 |
| top | average opponent: 1448record: 1-3 | new rating: 1538 | ||
| Grand Prix Liverpool 2017 (XLN limited) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 223 | Gregory, Matthew (1623) | Won 2-1 | +201539 |
| 2sealed | 97 | Lazarevas, Lukas (1525) | Lost 1-2 | -191520 |
| 3sealed | 448 | Foxall, Graham (1448) | Won 2-0 | +171537 |
| 4sealed | 197 | Rousseau, Maxime (1548) | Won 2-1 | +181555 |
| 5sealed | 92 | Montesi, Marco (1766) | Lost 0-2 | -141541 |
| 6sealed | 209 | Zeal, Dominic (1536) | Won 2-0 | +181559 |
| 7sealed | 111 | Boucetta, Joackim (1683) | Won 2-1 | +201579 |
| 8sealed | 64 | Madden, Stephen (1770) | Lost 1-2 | -141565 |
| 9sealed | 158 | Andrew, James (1630) | Won 2-1 | +191584 |
| 10draft | 180 | Aaliste, Emil Samuel (1520) | Lost 0-2 | -191565 |
| 11draft | 76 | Garus, Henning (1584) | Lost 1-2 | -181547 |
| 12draft | 110 | Farnell, Paul (1568) | Lost 1-2 | -181529 |
| 13draft | 156 | Tutill, Chris (1513) | Won 2-1 | +181547 |
| 14draft | 113 | Roberts, Martin (1508) | Won 2-1 | +171564 |
| 15draft | 126 | Buse, Jan (1581) | Won 2-1 | +191583 |
| top | average opponent: 1587record: 9-6 | new rating: 1583 | ||
| Grand Prix Stockholm 2016 (EMN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 16 | Dister, Herve (1430) | Won 2-0 | +171517 |
| 2sealed | 235 | Ravagli, Michael (1466) | Won 2-0 | +171534 |
| 3sealed | 114 | Sha, Chris (1565) | Lost 0-2 | -181516 |
| 4sealed | 348 | Muller, Benjamin (1498) | Won 2-0 | +181534 |
| 5sealed | 147 | Soderberg, Johannes (1538) | Lost 0-2 | -181516 |
| 6sealed | 335 | Mori, Roger (1395) | Won 2-0 | +161532 |
| 7sealed | 127 | Anttila, Markku (1674) | Lost 0-2 | -161516 |
| 8sealed | 250 | Riabokon, Natalia (1454) | Lost 0-2 | -191497 |
| 9sealed | 271 | Steinaa, Daniel (1687) | Won 2-1 | +221519 |
| top | average opponent: 1523record: 5-4 | new rating: 1519 | ||