Concha, Ivan
Current rating: 1551
Record: 19-18-3
| Regional Championships Santiago 2023 Cycle 3 (pioneer) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 25 | Oyarzun Jimenez, Paula (1461) | Won 2-1 | +161550 |
| 2pioneer | 26 | Daruich, Maximiliano (1577) | Lost 0-2 | -171533 |
| 3pioneer | 27 | Vargas, Carlos (1549) | Won 2-1 | +181551 |
| 4pioneer | 19 | Valdivieso, Freddy (1524) | Lost 0-2 | -191532 |
| 5pioneer | 25 | Miranda, Pancho A. (1503) | Won 2-0 | +181550 |
| 6pioneer | 18 | Ardiles, Luis (1573) | Won 2-1 | +181568 |
| 7pioneer | 11 | Lopez Lagos, Marcelo (1576) | Lost 1-2 | -171551 |
| top | average opponent: 1538record: 4-3 | new rating: 1551 | ||
| Regional Championships Santiago 2023 (ONE standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 5 | Moldenhauer, Gustavo (1468) | Won 2-0 | +181484 |
| 2standard | 24 | Romero, Fernando (1465) | Won 2-1 | +171501 |
| 3standard | 9 | Marin, Boris (1596) | Won 2-1 | +201521 |
| 4standard | 25 | Salvatto, Luis (1946) | Won 2-1 | +251546 |
| 5standard | 2 | BUJONES, LEANDRO (1536) | Lost 1-2 | -181528 |
| 6standard | 7 | Alico, Christian (1643) | Lost 0-2 | -161512 |
| 7standard | 12 | Rojas, Benjamin (1726) | Won 2-0 | +221534 |
| 8standard | 28 | Flores, Matias (1503) | Draw 1-1 | 01534 |
| top | average opponent: 1610record: 5-2-1 | new rating: 1534 | ||
| Grand Prix Santiago 2016 (KLD standard) | starting rating: 1449 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 42 | Molina, Marcelo [CHL] (1500) | Won 2-0 | +191468 |
| 2standard | 66 | Pineiro, Carlos (1426) | Lost 1-2 | -191449 |
| 3standard | 191 | Arredondo, Juan Francisco (1500) | Won 2-0 | +191468 |
| 4standard | 139 | Sanchez, Maximiliano (1785) | Lost 1-2 | -121456 |
| 5standard | 235 | Bustamante, Felipe (1615) | Won 2-0 | +201476 |
| 6standard | 123 | Castillo, Marcos (1472) | Won 2-1 | +181494 |
| 7standard | 75 | Carvallo Ossa, Sebastian (1536) | Won 2-1 | +191513 |
| 8standard | 42 | Merchan, Diego (1508) | Won 0-0 | +181531 |
| 9standard | 57 | Tafo, Daniel (1575) | Lost 1-2 | -171514 |
| 10standard | 68 | Reutter, Juan (1786) | Lost 1-2 | -131501 |
| 12standard | 77 | Segura, Esteban (1511) | Lost 1-2 | -181483 |
| 13standard | 72 | Villegas, Rodrigo (1527) | Lost 1-2 | -171466 |
| top | average opponent: 1562record: 6-6 | new rating: 1466 | ||
| Grand Prix Santiago 2013 (THS standard) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 190 | Huerta, Adrian (1473) | Draw 1-1 | +11447 |
| 2modern | 174 | Araya Munoz, Carlos (1500) | Won 2-0 | +191466 |
| 3modern | 170 | Grinblat, Ezequiel (1500) | Lost 0-2 | -181448 |
| 4modern | 251 | Snaider, Jhonatan (1455) | Won 2-1 | +181466 |
| 5modern | 170 | Cejas, Diego Esteban (1486) | Lost 0-2 | -171449 |
| top | average opponent: 1483record: 2-2-1 | new rating: 1449 | ||
| Grand Prix Santiago 2011 (ISD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 206 | Osorio Parot, Javier (1500) | Lost 0-2 | -181482 |
| 2sealed | 317 | Constanzo, Javier (1482) | Lost 0-2 | -181464 |
| 3sealed | 301 | Ossandon, Joaquin R (1464) | Won 2-0 | +181482 |
| 4sealed | 260 | Gallo, Hernan (1482) | Won 2-1 | +181500 |
| 5sealed | 188 | Sandoval, Pablo (1499) | Draw 1-1 | 01500 |
| 6sealed | 215 | Gonzalez, Mauricio (1500) | Lost 1-2 | -181482 |
| 7sealed | 219 | Oliveira, Jefferson S (1497) | Lost 1-2 | -181464 |
| 8sealed | 192 | Serrano, Pablo (1463) | Lost 0-2 | -181446 |
| top | average opponent: 1486record: 2-5-1 | new rating: 1446 | ||