Gruszka, Guillermo
Current rating: 1506
Record: 8-6 (GP) / 7-10-1 (professional)
| Grand Prix Santiago 2011 (ISD limited) | starting rating: 1460 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 129 | Sandoval, Pablo (1518) | Won 2-1 | +191479 |
| 3sealed | 27 | Bronico, Sebastian (1520) | Won 2-0 | +191498 |
| 4sealed | 67 | Pena, Andres (1554) | Won 2-0 | +191517 |
| 5sealed | 10 | Orbolato, Jefferson (1574) | Won 2-0 | +191536 |
| 6sealed | 6 | Lima Cardoso, Filipe (1674) | Lost 1-2 | -161520 |
| 7sealed | 25 | Iturra, Carlos (1571) | Lost 0-2 | -171503 |
| 8sealed | 43 | Hidalgo Araya, Felipe (1553) | Won 2-1 | +191522 |
| 9sealed | 62 | Basualdo, Exequiel (1609) | Lost 0-2 | -161506 |
| top | average opponent: 1572record: 5-3 | new rating: 1506 | ||
| 2002 World Championship (mixed) | starting rating: 1497 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 14 | Ulfarsson, Robert (1500) | Won 2-1 | +181515 |
| 2standard | 55 | Ranks, Andrew (1598) | Won 2-0 | +191534 |
| 3standard | 26 | McKeon, Robert (1478) | Lost 0-2 | -191515 |
| 4standard | 47 | Fiore, Stefano (1854) | Lost 0-2 | -121503 |
| 5standard | 69 | Khoo, Wei Ren (1658) | Lost 0-2 | -151488 |
| 6standard | 78 | Wescoe, Craig (1716) | Lost 1-2 | -141474 |
| 7draft | 53 | Grant, David (1438) | Lost 0-2 | -181456 |
| 8draft | 121 | Tang, Kai Cheong (1543) | Lost 0-2 | -171439 |
| 9draft | 109 | Penman, Douglas (1353) | Won 2-1 | +171456 |
| 10draft | 41 | Gardos, Gergely (1345) | Lost 0-2 | -201436 |
| 11draft | 88 | Limpadanai, Arvi (1454) | Draw 1-1 | 01436 |
| 12draft | 103 | Nemeth, Tibor (1323) | Won 2-0 | +161452 |
| 13block | 99 | Johannsson, Gunnar (1478) | Won 2-0 | +181470 |
| 14block | 87 | Siron, Geoffrey (1697) | Lost 0-2 | -141456 |
| 15block | 97 | Ishii, Kuniyoshi (1588) | Lost 1-2 | -151441 |
| 16block | 100 | Krejsa, Tomas (1503) | Won 2-1 | +191460 |
| 17block | 92 | Aw Yeong, Weng Kwong (1504) | Lost 0-2 | -171443 |
| 18block | 95 | Ortega Montero, Andres (1409) | Won 2-0 | +171460 |
| top | average opponent: 1524record: 7-10-1 | new rating: 1460 | ||
| Grand Prix Buenos Aires 2000 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 47 | Giovinazzo, Claudio (1518) | Won 2-0 | +181518 |
| 3extended | 6 | FAINBERG, DAVID (1536) | Won 2-0 | +191537 |
| 4extended | 23 | Gaete, Francisco (1316) | Lost 0-2 | -221515 |
| 5extended | 53 | De Gasperi, Nicolas (1482) | Lost 0-2 | -191496 |
| 6extended | 56 | Sarnago, Santiago (1518) | Lost 1-2 | -181478 |
| 7extended | 103 | Estrada, Pablo Javier (1500) | Won 2-1 | +191497 |
| top | average opponent: 1478record: 3-3 | new rating: 1497 | ||