Olszowy, John h
Current rating: 1493
Record: 34-38-1
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1490 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 553 | Kafka, Kyle (1611) | Draw 1-1 | +21492 |
| 2sealed | 422 | Beemer, Gregory (1500) | Won 2-0 | +181510 |
| 3sealed | 387 | Bowers, Joseph (1608) | Lost 0-2 | -161494 |
| 4sealed | 582 | Shreve, Bradley (1451) | Won 2-0 | +171511 |
| 5sealed | 408 | McKay, Mike (1501) | Lost 0-2 | -181493 |
| top | average opponent: 1534record: 2-2-1 | new rating: 1493 | ||
| Grand Prix Detroit 2013 (modern) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 14 | Piazza, John (1525) | Lost 1-2 | -171454 |
| 2modern | 438 | Gill, Jack (1482) | Lost 0-0 | -181436 |
| 3modern | 603 | McGarry, John K (1463) | Won 2-0 | +191455 |
| 4modern | 499 | Jardine, Kevin (1448) | Won 2-0 | +181473 |
| 5modern | 516 | Grosteffon, Josh (1500) | Won 2-0 | +181491 |
| 6modern | 431 | Schwab, Jason (1376) | Won 2-1 | +161507 |
| 7modern | 184 | King, Brady (1539) | Lost 0-2 | -171490 |
| top | average opponent: 1476record: 4-3 | new rating: 1490 | ||
| Grand Prix Pittsburgh 2013 (GTC limited) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 434 | Greiner, Jeremy (1500) | Lost 0-2 | -191491 |
| 2sealed | 566 | Sheets, Nicholas (1428) | Lost 1-2 | -191472 |
| 3sealed | 627 | Urban, Matthew (1532) | Won 2-0 | +191491 |
| 4sealed | 599 | Foley, Thomas (1345) | Lost 0-2 | -201471 |
| top | average opponent: 1451record: 1-3 | new rating: 1471 | ||
| Grand Prix Indianapolis 2013 (RTR limited) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 60 | Boehm, Christopher (1551) | Won 2-0 | +191545 |
| 4sealed | 1 | Payton, Tony (1556) | Lost 1-2 | -181527 |
| 5sealed | 173 | Morton, Philip (1540) | Won 2-0 | +181545 |
| 6sealed | 128 | Maine, Andrew (1585) | Lost 0-2 | -171528 |
| 7sealed | 175 | Myatt, Jason (1383) | Won 2-1 | +151543 |
| 8sealed | 129 | Troiano, Francesco (1544) | Lost 1-2 | -181525 |
| 9sealed | 122 | Wauer, Carl (1662) | Lost 0-2 | -151510 |
| top | average opponent: 1546record: 3-4 | new rating: 1510 | ||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 156 | Castro Mahoney, Roberto (1500) | Lost 0-2 | -181445 |
| 4sealed | 378 | Popp, Ryan (1526) | Lost 0-2 | -161429 |
| 5sealed | 575 | Duprez, Dean (1485) | Won 2-0 | +191448 |
| 6sealed | 345 | Zampierollo, Giorgio (1522) | Won 2-1 | +191467 |
| 7sealed | 364 | Gagnon Paradis, Ulysse (1570) | Won 2-0 | +201487 |
| 8sealed | 182 | Barone, Nicholas (1541) | Won 2-0 | +191506 |
| 9sealed | 79 | Carignan, Jay M (1577) | Won 2-1 | +191525 |
| 10sealed | 67 | Duke, Reid (1938) | Won 2-1 | +261551 |
| 11draft | 104 | Nezin, Alec (1787) | Lost 1-2 | -141537 |
| 12draft | 11 | Kramer, Daniel (1793) | Won 2-1 | +221559 |
| 13draft | 48 | Rasmussen, Ben (1759) | Lost 0-2 | -141545 |
| 14draft | 23 | Stone, Matt (1501) | Lost 1-2 | -191526 |
| top | average opponent: 1625record: 7-5 | new rating: 1526 | ||
| Grand Prix Columbus 2012 (modern) | starting rating: 1421 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 242 | Burgess, Ryan (1504) | Won 2-1 | +201441 |
| 3modern | 141 | Higginbottom, James (1536) | Lost 0-2 | -161425 |
| 4modern | 342 | Willis, Scott (1468) | Lost 0-2 | -181407 |
| 5modern | 307 | Vasil, Jeremy (1449) | Won 2-1 | +191426 |
| 6modern | 237 | Amrhein, Robert (1515) | Won 2-0 | +201446 |
| 7modern | 140 | Rowan, Matthew (1536) | Won 2-0 | +191465 |
| 8modern | 117 | Hulings, Brandon (1542) | Won 2-0 | +201485 |
| 9modern | 44 | Jacob, Maxwell (1596) | Won 2-1 | +201505 |
| 10modern | 28 | Baylock, Deshaun (1577) | Lost 1-2 | -171488 |
| 11modern | 72 | Blegen, Eric (1593) | Won 2-1 | +201508 |
| 12modern | 43 | Mcclain, Josh (1865) | Lost 0-2 | -121496 |
| 13modern | 60 | Beecher, Mike (1567) | Lost 1-2 | -161480 |
| 14modern | 60 | Applegate, David (1539) | Lost 0-2 | -171463 |
| top | average opponent: 1561record: 7-6 | new rating: 1463 | ||
| Grand Prix Pittsburgh 2011 (M12 standard) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 319 | Martinez, Micheal S (1500) | Lost 1-2 | -171414 |
| 2standard | 423 | Montanaro Jr, William (1482) | Lost 1-2 | -171397 |
| 3standard | 586 | Russell, Melody (1481) | Won 2-0 | +201417 |
| 4standard | 638 | Huntzinger, Alex (1482) | Won 2-0 | +191436 |
| 5standard | 389 | Caplan, David (1631) | Lost 0-2 | -151421 |
| top | average opponent: 1515record: 2-3 | new rating: 1421 | ||
| Grand Prix Los Angeles 2009 (extended) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 25 | Riccardi, Joseph (1500) | Won 2-1 | +191483 |
| 2extended | 67 | Halavais, Arthur (1465) | Lost 1-2 | -191464 |
| 3extended | 211 | Bulkowski, Jason M (1492) | Lost 1-2 | -171447 |
| 4extended | 318 | Maas, Jared (1480) | Lost 0-2 | -171430 |
| 5extended | 348 | Tangtam, Krisada (1460) | Won 2-0 | +181448 |
| 6extended | 275 | Zheng, Alan (1482) | Lost 1-2 | -171431 |
| top | average opponent: 1480record: 2-4 | new rating: 1431 | ||
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 288 | Jones, Nathan (1500) | Lost 0-1 | -181500 |
| 2sealed | 416 | McCown, Monica (1447) | Lost 0-2 | -191481 |
| 3sealed | 462 | Dryan, Jason (1464) | Lost 1-2 | -191462 |
| 4sealed | 481 | Smith, Justin (1504) | Won 2-1 | +191481 |
| 5sealed | 384 | Hayrynen, Andrei (1528) | Lost 0-2 | -171464 |
| top | average opponent: 1488record: 1-4 | new rating: 1464 | ||
| Grand Prix Columbus 2007 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 266 | Smith, Palmer (1500) | Lost 0-2 | -181482 |
| 2legacy | 375 | Palmer, Josh (1481) | Won 2-1 | +181500 |
| 3legacy | 304 | Mancinelli, Matthew (1500) | Lost 0-2 | -181482 |
| 4legacy | 290 | horn, matt (1482) | Won 2-0 | +181500 |
| 5legacy | 240 | Hartten, Chris (1500) | Lost 1-2 | -181482 |
| 6legacy | 299 | Rodriguez, Juan C (1483) | Won 2-1 | +181500 |
| 7legacy | 224 | Minch, Michael (1501) | Won 2-0 | +181518 |
| 8legacy | 168 | Wongtawon, Suracheat (1520) | Won 2-0 | +181536 |
| 9legacy | 139 | Pederson, Michael w (1537) | Lost 0-2 | -181518 |
| top | average opponent: 1501record: 5-4 | new rating: 1518 | ||