Koson, Todd
Current rating: 1636
Record: 23-13
| Grand Prix Indianapolis 2015 (BFZ standard) | starting rating: 1637 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 146 | Dehlin, Eric (1518) | Won 2-0 | +161653 |
| 2standard | 178 | Yeh, Chih-Cheng (1689) | Lost 0-2 | -171636 |
| 3standard | 425 | Connelly, Sebastian (1500) | Lost 1-2 | -211615 |
| 4standard | 399 | Hobbs, Calvin (1483) | Lost 0-2 | -201595 |
| 5standard | 452 | Angel, Jeffrey (1368) | Won 2-1 | +141609 |
| 6standard | 380 | Brouke, Cody (1429) | Won 2-1 | +151624 |
| 7standard | 292 | Steele, CJ (1585) | Lost 0-2 | -191605 |
| 8standard | 257 | Raz, Wesley (1417) | Won 2-0 | +151620 |
| 9standard | 195 | Rasch, Will (1504) | Won 0-0 | +161636 |
| top | average opponent: 1499record: 5-4 | new rating: 1636 | ||
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1599 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1028 | Barnes, David [USA] (1500) | Lost 1-2 | -201579 |
| 2modern | 1067 | Livingston, Justin (1502) | Lost 0-2 | -201559 |
| 3modern | 1078 | NACCI, ERIC (1464) | Lost 0-0 | -191540 |
| 4modern | 1078 | Parker, Marshall (1447) | Won 2-1 | +161556 |
| 5modern | 1067 | Martin, Reggie (1465) | Won 2-0 | +161572 |
| 6modern | 1047 | Hulsey, Jessica (1453) | Won 2-1 | +161588 |
| 7modern | 1036 | Shovar, Philip (1442) | Won 2-1 | +151603 |
| 8modern | 1021 | Crooks, Louis (1612) | Won 2-1 | +191622 |
| 9modern | 1019 | Clyburn, Brandon (1500) | Won 2-1 | +151637 |
| top | average opponent: 1487record: 6-3 | new rating: 1637 | ||
| Grand Prix Memphis 2015 (FRF standard) | starting rating: 1551 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 95 | Young, Levi (1528) | Lost 1-2 | -191532 |
| 2standard | 320 | Patterson, Darren (1482) | Won 2-1 | +171549 |
| 3standard | 282 | Tang, Fredy (1554) | Won 2-0 | +191568 |
| 4standard | 249 | Osborne, Zachary (1468) | Won 2-1 | +161584 |
| 5standard | 152 | Butler, Jessie (1696) | Lost 1-2 | -161568 |
| 6standard | 178 | Hamilton, William (1495) | Won 2-0 | +161584 |
| 7standard | 111 | Steadman, Tyler (1455) | Lost 1-2 | -201564 |
| 8standard | 187 | Goldsmith, Eric (1524) | Won 2-0 | +171581 |
| 9standard | 151 | Goodwin, Brett (1537) | Won 2-0 | +181599 |
| top | average opponent: 1526record: 6-3 | new rating: 1599 | ||
| Grand Prix Omaha 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 375 | Connor, John (1553) | Lost 1-2 | -171483 |
| 2modern | 348 | King, James (1345) | Won 2-0 | +151498 |
| 3modern | 398 | Bylander, Jeremy (1543) | Lost 1-2 | -171481 |
| 4modern | 459 | Morrow, Jacob (1480) | Won 2-1 | +181499 |
| 5modern | 414 | Switzer, Brian (1481) | Won 2-0 | +181517 |
| 6modern | 209 | McNeilly, Jacob (1519) | Won 2-1 | +181535 |
| 7modern | 190 | Engelen, Jessica (1444) | Won 2-1 | +161551 |
| 8modern | 111 | Chilen, Joseph (1525) | Won 2-1 | +181569 |
| 9modern | 93 | Meier, Gregory (1566) | Lost 1-2 | -181551 |
| top | average opponent: 1495record: 6-3 | new rating: 1551 | ||