Jacobo, Roman
Current rating: 1540
Record: 20-19-1
| Grand Prix Dallas-Fort Worth 2018 (DOM limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 185 | Zaalo, Zaalo (1500) | Won 2-0 | +191500 |
| 2sealed | 118 | Ronan, Thomas (1518) | Won 2-0 | +181518 |
| 3sealed | 32 | Dallmeyer, Dustin (1538) | Won 2-0 | +181536 |
| 4sealed | 121 | Ritner, Ronnie (1912) | Lost 1-2 | -111525 |
| 5sealed | 172 | Fernando, Ronald (1475) | Won 2-0 | +171542 |
| 6sealed | 127 | Swarowski, Robert (1956) | Lost 0-2 | -111531 |
| 7sealed | 128 | Ho, William (1721) | Won 2-0 | +221553 |
| 8sealed | 85 | Solis, Julian (1600) | Won 2-1 | +181571 |
| 9sealed | 38 | Delmarter, Raymond (1519) | Won 2-0 | +171588 |
| 10draft | 104 | Batow, Timothy (1614) | Lost 0-2 | -171571 |
| 11draft | 80 | Nguyen, David (1845) | Lost 1-2 | -131558 |
| 12draft | 17 | Jowers, Kenneth (1547) | Lost 0-2 | -181540 |
| top | average opponent: 1645record: 7-5 | new rating: 1540 | ||
| Grand Prix Houston 2016 (OGW standard) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 294 | Lima, Edgardo (1500) | Lost 0-2 | -181465 |
| 2standard | 486 | DeRosa-Grund, Trevor (1480) | Won 2-0 | +181483 |
| 3standard | 504 | Keller, Israel (1441) | Won 2-1 | +181501 |
| 4standard | 459 | Keathley, Zach (1400) | Lost 0-2 | -201481 |
| 5standard | 473 | Bass, Michael (1498) | Won 2-0 | +181499 |
| 6standard | 355 | Ochoa, Aaron (1503) | Won 2-0 | +181517 |
| 7standard | 264 | Rozell, Ross (1537) | Lost 1-2 | -171500 |
| 8standard | 420 | Makholm, Patrick (1486) | Lost 0-2 | -191481 |
| top | average opponent: 1481record: 4-4 | new rating: 1481 | ||
| Grand Prix San Antonio 2014 (KTK standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 15 | Cinotto, Chuck (1469) | Won 2-0 | +181482 |
| 2standard | 280 | Corgey, Hillary (1517) | Won 2-0 | +181500 |
| 3standard | 72 | Brown, Jacob (1611) | Lost 0-2 | -161484 |
| 4standard | 241 | Patton, Ariel (1519) | Won 2-0 | +191503 |
| 5standard | 198 | High, Rodney (1379) | Lost 0-2 | -201483 |
| top | average opponent: 1499record: 3-2 | new rating: 1483 | ||
| Grand Prix San Antonio 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 112 | Ricker, Charles (1500) | Won 2-1 | +181518 |
| 2standard | 142 | Britt, John Marshall (1518) | Lost 1-2 | -181500 |
| 3standard | 169 | Saba, Adam (1500) | Lost 1-2 | -181482 |
| 4standard | 300 | Cervantes, Chris (1478) | Lost 0-2 | -181464 |
| top | average opponent: 1499record: 1-3 | new rating: 1464 | ||
| Grand Prix Austin 2012 (ISD limited) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 21 | Sellars, Richard M (1518) | Lost 0-2 | -191518 |
| 3sealed | 241 | Bruno, David (1502) | Lost 0-2 | -181500 |
| 4sealed | 413 | Rawdah, Nabilah (1481) | Draw 1-1 | 01500 |
| top | average opponent: 1500record: 0-2-1 | new rating: 1500 | ||
| Grand Prix Dallas-Fort Worth 2011 (MBS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 100 | Martin, Ruben (1500) | Won 2-0 | +181518 |
| 2standard | 187 | Hill Jr., Jerry (1483) | Lost 0-1 | -191499 |
| 3standard | 288 | Starkey, Brandon (1502) | Won 2-1 | +181517 |
| 4standard | 222 | Pettit, Terry (1521) | Won 2-1 | +181535 |
| 5standard | 131 | Blanco, Cristopher L (1489) | Won 2-1 | +181553 |
| 6standard | 153 | Miller, Jake C (1670) | Won 2-0 | +201573 |
| 7standard | 86 | Bogucki, Woodrow (1535) | Lost 1-2 | -191554 |
| 8standard | 99 | Pieper, Charles (1592) | Lost 0-2 | -171537 |
| top | average opponent: 1536record: 5-3 | new rating: 1537 | ||