Concha, Joshua
Current rating: 1437
Record: 24-30-3
| Grand Prix Sao Paulo 2018 (modern) | starting rating: 1530 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 400 | Martianez, Hernan (1507) | Lost 0-2 | -191511 |
| 2modern | 556 | Flores Junior, Luiz Carlos (1482) | Draw 1-1 | 01511 |
| 3modern | 584 | Araujo, Emerson (1532) | Lost 0-2 | -181493 |
| 4modern | 641 | Paoliello, Thiago Cezar (1464) | Lost 0-1 | -181475 |
| 5modern | 613 | Del Re, Gabriel (1448) | Lost 0-2 | -191456 |
| 6modern | 537 | Souza, Leone (1379) | Lost 0-2 | -191437 |
| top | average opponent: 1469record: 0-5-1 | new rating: 1437 | ||
| Grand Prix Santiago 2017 (AKH standard) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 160 | Rognoli Arango, Gabriel Rodrigo (1519) | Won 2-1 | +181507 |
| 2standard | 17 | Passanante, Sebastian (1562) | Won 2-1 | +191526 |
| 3standard | 7 | Mohor, Carlos (1592) | Won 2-0 | +201546 |
| 4standard | 87 | Collado, Jorge (1660) | Won 2-0 | +201566 |
| 5standard | 33 | Ferro Valdivia, Daniel (1651) | Won 2-0 | +191585 |
| 6standard | 20 | Carmona, Sebastian (1498) | Lost 1-2 | -191566 |
| 7standard | 15 | Epstein, Nicolas (1545) | Lost 0-2 | -191547 |
| 8standard | 104 | Marin, Boris (1541) | Lost 1-2 | -181529 |
| 9standard | 86 | Vejar, Fernando (1408) | Won 2-1 | +161545 |
| 10standard | 353 | Delbuono, Umberto (1557) | Won 2-0 | +181563 |
| 11standard | 321 | Strasky, Ondrej (1934) | Lost 1-2 | -111552 |
| 12standard | 347 | Chong, Cristian (1734) | Lost 1-2 | -151537 |
| 13standard | 366 | Sittner, Alex (1920) | Won 2-0 | +251562 |
| 14standard | 365 | Scasserra, Alejandro Tomas (1504) | Lost 1-2 | -191543 |
| 15standard | 356 | Virula, Christopher (1832) | Lost 1-2 | -131530 |
| top | average opponent: 1631record: 8-7 | new rating: 1530 | ||
| Grand Prix Santiago 2016 (KLD standard) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 159 | Jilberto Otarola, Eduardo (1490) | Won 2-0 | +191474 |
| 2standard | 103 | Nunez, Felipe (1483) | Won 2-0 | +181492 |
| 3standard | 40 | Monsalve, Andres (1647) | Lost 0-2 | -151477 |
| 4standard | 186 | Gonzalez Satt, Nicolas (1492) | Draw 1-1 | 01477 |
| 5standard | 168 | Latorraca, Walter Bruno (1649) | Won 2-0 | +211498 |
| 6standard | 94 | Souza, Joao Claudio (1593) | Won 2-1 | +201518 |
| 7standard | 66 | Lauria, Pedro (1555) | Lost 0-2 | -171501 |
| 8standard | 117 | Ramirez, Jon (1518) | Won 0-0 | +181519 |
| 9standard | 77 | Yaksic Carrasco, Fernando (1552) | Won 2-0 | +191538 |
| 10standard | 40 | Guerrero, Alvaro (1659) | Draw 1-1 | +21540 |
| 11standard | 66 | Kurohane, Cesar (1550) | Lost 0-2 | -181522 |
| 12standard | 81 | Ojeda, Juan Pablo (1568) | Lost 0-2 | -171505 |
| 13standard | 88 | Castillo, Felipe (1540) | Lost 0-2 | -181487 |
| 14standard | 88 | Gajardo, Matias (1507) | Lost 0-1 | -171470 |
| 15standard | 87 | Salgado, Patricio (1525) | Won 2-0 | +191489 |
| top | average opponent: 1555record: 7-6-2 | new rating: 1489 | ||
| Grand Prix Santiago 2015 (ORI limited) | starting rating: 1428 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 64 | Gonzalez Pizarro, Loreto Mercedes (1500) | Won 2-1 | +191447 |
| 2sealed | 67 | Ubillo, Agustin (1517) | Won 2-0 | +201467 |
| 3sealed | 12 | Espinoza, Roberto (1612) | Won 2-1 | +201487 |
| 4sealed | 19 | Pena Congregado, Nahuel (1462) | Won 2-1 | +181505 |
| 5sealed | 13 | Barros, Victor (1629) | Lost 1-2 | -161489 |
| 6sealed | 20 | Cifuentes, Diego (1499) | Lost 1-2 | -181471 |
| 7sealed | 131 | Quiroga, Mariano (1586) | Lost 1-2 | -161455 |
| top | average opponent: 1544record: 4-3 | new rating: 1455 | ||
| Grand Prix Santiago 2014 (KTK standard) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 25 | Calcagno, Leonardo (1658) | Lost 1-2 | -161500 |
| 3standard | 251 | Mendez, Victor (1545) | Lost 0-2 | -171483 |
| 4standard | 270 | Pinto, Fernando (1491) | Lost 0-2 | -181465 |
| 5standard | 275 | Dos Santos, Maria Emil (1462) | Lost 0-2 | -181447 |
| 6standard | 251 | Valdivia, Alexis (1396) | Lost 0-2 | -191428 |
| top | average opponent: 1510record: 0-5 | new rating: 1428 | ||
| Grand Prix Santiago 2013 (THS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 186 | Coronado Gonzalez, Jonathan (1500) | Won 2-1 | +181518 |
| 2modern | 161 | Nunez Fernandez, Rodrigo Antonio (1500) | Lost 1-2 | -181500 |
| 3modern | 195 | Hochman, Sabrina (1425) | Won 2-1 | +161516 |
| 4modern | 223 | Oyarzo, Cristhian (1517) | Won 2-1 | +181534 |
| 5modern | 61 | Martinez, Felipe (1505) | Lost 1-2 | -181516 |
| 6modern | 157 | Cordova, Camilo (1518) | Won 2-0 | +181534 |
| 7modern | 132 | castro, cristobal (1535) | Lost 1-2 | -181516 |
| 8modern | 133 | Parra, Pablo (1513) | Lost 0-2 | -181498 |
| 9modern | 144 | Vargas, Luis 2 (1481) | Won 2-1 | +181516 |
| top | average opponent: 1499record: 5-4 | new rating: 1516 | ||