Zonatto, Guilherme Leandro
Current rating: 1569
Record: 37-37-2
Grand Prix Rio de Janeiro 2001Grand Prix Curitiba 2001Grand Prix Porto Alegre 2004Grand Prix Tampa 2009Grand Prix Sao Paulo 2012Grand Prix Santiago 2013Grand Prix Sao Paulo 2015Grand Prix Porto Alegre 2015Grand Prix Porto Alegre 2017Grand Prix Sao Paulo 2019Regional Championships Sao Paulo 2023 Cycle 3
| Regional Championships Sao Paulo 2023 Cycle 3 (pioneer) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 27 | Pereira Melo, Anderson (1396) | Lost 0-2 | -211500 |
| 2pioneer | 65 | Fernandes, Lucas (1428) | Won 2-1 | +171517 |
| 3pioneer | 51 | Mattos, Gabriel (1479) | Won 2-0 | +171534 |
| 4pioneer | 31 | Martins, Eli (1373) | Won 2-0 | +151549 |
| 5pioneer | 8 | Carvalho, Guilherme (1539) | Draw 1-1 | 01549 |
| 6pioneer | 18 | Neto, Araken (1329) | Lost 0-2 | -221527 |
| 7pioneer | 28 | Souza Braga, Gabriel (1527) | Won 2-1 | +181545 |
| 8pioneer | 10 | Borges, Eduardo (1890) | Won 2-1 | +241569 |
| top | average opponent: 1495record: 5-2-1 | new rating: 1569 | ||
| Grand Prix Sao Paulo 2019 (modern) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 115 | Graca, Thiago (1609) | Lost 0-2 | -171541 |
| 3modern | 538 | Lima, Rafael (1435) | Lost 0-2 | -201521 |
| top | average opponent: 1522record: 0-2 | new rating: 1521 | ||
| Grand Prix Porto Alegre 2017 (AER standard) | starting rating: 1543 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 34 | Alves Bilhar, Rafael (1489) | Draw 1-1 | -11542 |
| 3standard | 146 | Brasil, Marcus (1484) | Lost 0-2 | -191523 |
| 4standard | 191 | Vieira, Marlon (1499) | Won 2-1 | +181541 |
| 5standard | 134 | De Carvalho, Eduardo (1556) | Won 2-1 | +181559 |
| 6standard | 84 | Araujo, Jose Willams (1536) | Won 2-0 | +181577 |
| 7standard | 55 | Almeida, Marcela (1468) | Lost 1-2 | -201557 |
| 8standard | 91 | Hilario Mazza Da Silva, Murilo (1589) | Won 2-0 | +181575 |
| 9standard | 59 | Levandovski, Eduardo (1595) | Lost 0-2 | -171558 |
| top | average opponent: 1527record: 4-3-1 | new rating: 1558 | ||
| Grand Prix Porto Alegre 2015 (modern) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 114 | de Magalhaes Scalli, Guilherme (1515) | Won 2-0 | +181505 |
| 3modern | 108 | Santos Navarro, Thales (1720) | Won 2-1 | +221527 |
| 4modern | 44 | Pena Congregado, Nahuel (1587) | Won 2-0 | +191546 |
| 5modern | 19 | Volpato, Bruno (1508) | Lost 0-2 | -181528 |
| 6modern | 40 | Dos Anjos, Mateus (1758) | Won 2-1 | +221550 |
| 7modern | 13 | Turello, Maximiliano (1577) | Won 2-1 | +181568 |
| 8modern | 21 | Aqel, Muhammad (1564) | Won 2-1 | +181586 |
| 9modern | 14 | Fernando Silva, Victor (1695) | Lost 1-2 | -161570 |
| 10modern | 22 | Manzoni, Pedro (1636) | Lost 0-0 | -171553 |
| 11modern | 39 | Victor Souza Vieira, J (1561) | Won 2-1 | +191572 |
| 12modern | 29 | Cortez, Paulo Ricardo (1935) | Lost 1-2 | -121560 |
| 13modern | 34 | Toro, Rafael W (1663) | Lost 0-0 | -161544 |
| 14modern | 32 | Souza, Gabriel1109 (1580) | Won 2-0 | +181562 |
| 15modern | 33 | Rosseto, Matheus (1505) | Lost 0-2 | -191543 |
| top | average opponent: 1629record: 8-6 | new rating: 1543 | ||
| Grand Prix Sao Paulo 2015 (DTK standard) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 24 | Henrique de Moraes e S, (1517) | Won 2-1 | +191503 |
| 3standard | 206 | Silva da Lima, Ramon (1539) | Won 2-1 | +181521 |
| 4standard | 10 | Ruz, Walter (1585) | Lost 1-2 | -171504 |
| 5standard | 195 | Lemos Mota, Matheus (1534) | Won 2-1 | +191523 |
| 6standard | 84 | De Araujo De Souza, Jo (1538) | Lost 1-2 | -181505 |
| 7standard | 155 | Albernaz Junior, Demostenes (1487) | Lost 1-2 | -181487 |
| top | average opponent: 1533record: 3-3 | new rating: 1487 | ||
| Grand Prix Santiago 2013 (THS standard) | starting rating: 1393 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 192 | Ferrari Spampinato, Gonzalo (1734) | Won 2-1 | +241417 |
| 2modern | 154 | Gonzalez, Marcelo (1519) | Won 2-0 | +201437 |
| 3modern | 328 | Solis Flores, Roberto Alexis (1550) | Won 2-0 | +201457 |
| 4modern | 85 | Reicherstorfer, Axel (1566) | Lost 1-2 | -161441 |
| 5modern | 84 | Freitas, Fernando Luiz (1551) | Won 2-1 | +201461 |
| 6modern | 81 | Mayer Allende, Carlos (1556) | Won 2-0 | +201481 |
| 7modern | 28 | Muller, Gonzalo Javier (1536) | Won 2-0 | +191500 |
| 8modern | 1 | Altamirano, Alejandro (1590) | Lost 0-2 | -161484 |
| 9modern | 35 | Ramos, Levi (1593) | Won 2-0 | +201504 |
| 10modern | 15 | Rodriguez, Matias (1614) | Lost 0-2 | -161488 |
| 11modern | 39 | Pereira Siqueira, Amanda Stefani (1573) | Won 2-0 | +191507 |
| 12modern | 29 | Tapia Becerra, Felipe (2031) | Won 2-0 | +271534 |
| 13modern | 25 | Otarola, Juan (1636) | Lost 0-2 | -161518 |
| 14modern | 23 | Tapia, Juan (1565) | Lost 0-2 | -171501 |
| 15modern | 35 | Vega Cuevas, Carlos Jonatan (1575) | Lost 1-2 | -171484 |
| top | average opponent: 1612record: 9-6 | new rating: 1484 | ||
| Grand Prix Sao Paulo 2012 (M13 limited) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 101 | Montanhe, Tiago de Moraes (1500) | Lost 0-2 | -171425 |
| 2sealed | 265 | de Melo Miranda, Pedro Henrique (1599) | Lost 1-2 | -141411 |
| 3sealed | 281 | Araujo Biserra Junior, Antonio (1464) | Lost 0-2 | -181393 |
| top | average opponent: 1521record: 0-3 | new rating: 1393 | ||
| Grand Prix Tampa 2009 (ZEN limited) | starting rating: 1439 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 55 | Mills, Casey (1467) | Won 2-0 | +181457 |
| 2sealed | 181 | Lepore, Frank (1503) | Lost 0-2 | -171440 |
| 3sealed | 290 | Militti, Mike J (1518) | Won 2-1 | +191459 |
| 4sealed | 254 | Velazquez, Jonathan (1516) | Lost 1-2 | -171442 |
| top | average opponent: 1501record: 2-2 | new rating: 1442 | ||
| Grand Prix Porto Alegre 2004 (COK limited) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 30 | Lautert, Marcio (1517) | Lost 0-2 | -171453 |
| 3sealed | 65 | Cruz, Jorge (1465) | Lost 1-2 | -181435 |
| 4sealed | 116 | Barbosa Correa, Leopoldo (1483) | Lost 0-2 | -171418 |
| 5sealed | 136 | De Moraes, Ricardo (1464) | Won 2-0 | +191437 |
| 6sealed | 113 | Sotres, Reinaldo (1481) | Won 2-1 | +191456 |
| 7sealed | 92 | Rios, Roque (1500) | Lost 1-2 | -171439 |
| top | average opponent: 1485record: 2-4 | new rating: 1439 | ||
| Grand Prix Curitiba 2001 (extended) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 16 | Vieira, Victor (1500) | Lost 0-0 | -171448 |
| 3extended | 84 | Pereira Melo Jr., Adilson (1502) | Won 2-0 | +191467 |
| 4extended | 87 | Ruman, Caio Jorge (1516) | Lost 1-2 | -171450 |
| 5extended | 116 | Patyk, Alberto A. (1499) | Won 2-0 | +191469 |
| 6extended | 76 | Beck, Diogo Henrique (1517) | Won 2-0 | +191488 |
| 7extended | 61 | Galimberti P. Abreu, Rurik (1517) | Lost 0-2 | -181470 |
| top | average opponent: 1509record: 3-3 | new rating: 1470 | ||
| Grand Prix Rio de Janeiro 2001 (PLS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 41 | Farias, Regis Fernandes (1518) | Lost 0-2 | -181482 |
| 3sealed | 80 | Spagolla Vehara, Pedro Henri (1500) | Lost 0-2 | -171465 |
| 4sealed | 147 | Costa Cruz, Marcelo Alexandr (1482) | Won 2-0 | +181483 |
| 5sealed | 91 | Da Silva Santos, Eric (1500) | Lost 0-2 | -181465 |
| top | average opponent: 1500record: 1-3 | new rating: 1465 | ||