Nieto, Oscar
Current rating: 1605
Record: 29-22
| Grand Prix Barcelona 2016 (SOI limited) | starting rating: 1588 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 195 | Almeida, Keith (1528) | Lost 1-2 | -191569 |
| 2sealed | 585 | Lebedev, Dmitry (1482) | Won 2-1 | +171586 |
| 3sealed | 626 | Grail, Julien (1501) | Won 2-1 | +161602 |
| 4sealed | 662 | Balcells, Josep (1652) | Won 2-1 | +191621 |
| 5sealed | 460 | Rabie, Mikael (1771) | Lost 0-2 | -151606 |
| 6sealed | 497 | Olmos, Victor (1480) | Won 2-0 | +151621 |
| 7sealed | 372 | Langer, Tomas (1714) | Lost 0-2 | -161605 |
| top | average opponent: 1590record: 4-3 | new rating: 1605 | ||
| Grand Prix Madrid 2015 (ORI limited) | starting rating: 1629 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 177 | Javier, Milan (1500) | Lost 1-2 | -201609 |
| 2sealed | 461 | Pavon Losada, Juan Antonio (1479) | Lost 1-2 | -211588 |
| top | average opponent: 1489record: 0-2 | new rating: 1588 | ||
| Grand Prix Utrecht 2015 (MM2 limited) | starting rating: 1610 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2287 | Castermans, Nicky (1455) | Won 2-0 | +151625 |
| 2sealed | 2225 | Spognardi, Francesco (1549) | Won 2-0 | +161641 |
| 3sealed | 2063 | Nguyen, Minh [UK] (1566) | Won 2-1 | +171658 |
| 4sealed | 2012 | Alhadhrami, Abdulrahman (1500) | Lost 1-2 | -211637 |
| 5sealed | 2172 | Kumok, Vadim (1474) | Won 2-0 | +151652 |
| 6sealed | 2090 | Heisel, Guido (1556) | Lost 0-2 | -191633 |
| 7sealed | 2101 | Solverod, Finn Erik (1590) | Won 2-0 | +171650 |
| 8sealed | 2125 | Lew, Kelvin (1496) | Lost 1-2 | -211629 |
| top | average opponent: 1523record: 5-3 | new rating: 1629 | ||
| Grand Prix Madrid 2012 (DKA limited) | starting rating: 1615 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 770 | Ferreres, Alvaro (1446) | Won 2-0 | +151630 |
| 2sealed | 689 | Marques, Rodolfo (1500) | Won 2-0 | +161646 |
| 3sealed | 652 | Comte, Florian (1740) | Lost 0-2 | -171629 |
| 4sealed | 709 | Salvador, Roger (1529) | Lost 0-2 | -191610 |
| top | average opponent: 1554record: 2-2 | new rating: 1610 | ||
| Grand Prix Madrid 2010 (legacy) | starting rating: 1619 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 922 | Salazar, Juan [ESP] (1500) | Won 2-0 | +161635 |
| 2legacy | 795 | Castellano, Juan Carlos (1517) | Lost 0-2 | -201615 |
| top | average opponent: 1509record: 1-1 | new rating: 1615 | ||
| Grand Prix Madrid 2008 (EVE limited) | starting rating: 1624 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 195 | Llana Ramos, Luis (1502) | Won 2-0 | +151639 |
| 2sealed | 21 | Ventura, Sergio (1608) | Lost 1-2 | -181621 |
| 3sealed | 247 | Araque, Francisco (1500) | Won 2-1 | +161637 |
| 4sealed | 117 | Panara, Bruno (1686) | Lost 0-2 | -181619 |
| top | average opponent: 1574record: 2-2 | new rating: 1619 | ||
| Grand Prix Bilbao 2005 (extended) | starting rating: 1634 | |||
| round | table | opponent (rating) | result | Δrating |
| 2extended | 362 | Tejero Hernandez, Joaqin (1516) | Won 2-1 | +161650 |
| 3extended | 386 | Clark, Matthew E (1538) | Won 2-0 | +161666 |
| 4extended | 380 | Domingo, Gonzalo (1447) | Lost 0-2 | -221644 |
| 5extended | 397 | Bordon Gonzalez, Jose Ramon (1532) | Lost 0-2 | -201624 |
| top | average opponent: 1508record: 2-2 | new rating: 1624 | ||
| Grand Prix Lisbon 2005 (BOK limited) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 24 | Bevere, Gianluca (1663) | Won 2-0 | +201559 |
| 5sealed | 14 | Ortiz, Lucas (1519) | Won 2-0 | +171576 |
| 6sealed | 7 | Levy, Raphael (1814) | Won 2-1 | +231599 |
| 7sealed | 3 | Carvalho, Marcio (1813) | Lost 0-2 | -151584 |
| 8sealed | 10 | Pichardo, Victor (1531) | Won 2-1 | +171601 |
| 9sealed | 3 | Martins, Joao (1853) | Won 2-1 | +231624 |
| 10draft | 50 | Abreu, Joao (1732) | Lost 0-2 | -161608 |
| 11draft | 46 | Gutierrez, Demetrio (1527) | Won 2-1 | +161624 |
| 12draft | 14 | Jonsson, Anton (2106) | Lost 0-2 | -91615 |
| 13draft | 56 | Company Bernal, Miquel (1616) | Won 2-1 | +181633 |
| 14draft | 52 | Blazquez, David (1637) | Lost 0-2 | -181615 |
| 15draft | 18 | Monteiro, Jorge (1669) | Won 2-0 | +191634 |
| top | average opponent: 1707record: 8-4 | new rating: 1634 | ||
| Grand Prix Madrid 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 97 | REY DEL, JUAN ANGEL (1500) | Won 2-1 | +181518 |
| 2sealed | 212 | Perez, Jose Miguel (1518) | Won 2-0 | +181536 |
| 3sealed | 41 | Sanchez Sanchez, Alfredo (1536) | Won 2-0 | +181554 |
| 4sealed | 74 | Callejas, Jesus (1557) | Won 2-0 | +181572 |
| 5sealed | 7 | Ardoino, Marco (1573) | Lost 1-2 | -181554 |
| 6sealed | 140 | Ortiz, Carlos (1553) | Won 2-0 | +181572 |
| 7sealed | 25 | Perez, Bastien (1710) | Lost 0-2 | -151557 |
| 8sealed | 148 | Vila Garcia, Miguel (1567) | Lost 0-2 | -181539 |
| top | average opponent: 1564record: 5-3 | new rating: 1539 | ||