Wins
232
Indexed tournament wins
Player record
Sean Koster
Losses
316
Indexed tournament losses
Matches
548
Decisive results
Win rate
42.3%
Across indexed matches
Peak rating
1,907
Highest rating in the available history.
Biggest upset
Connell, Grant
2017 Arizona Open & Giant RR · Feb 18, 2017 · +529 rating
Open →Biggest loss
Shikhare, Rudra
North-West La Open 2** Sanctioned Tournament · Nov 18, 2018 · -601 rating
Open →Most frequent opponent
Mike Burg
13 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
62 tournament appearances · synced Aug 8, 2026, 2:52 PM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| May 5, 2018 | 2018 Arizona ClosedTournament · View matches · USATT readjusted 1,564 → 1,658 | 1,564 | 1,669 | +11+59 / -48 | 9W / 11L |
| Apr 29, 2018 | North West LA Open 2 Tournament · View matches | 1,521 | 1,564 | +43+65 / -22 | 4W / 4L |
| Apr 28, 2018 | LATTA Open AprilTournament · View matches | 1,598 | 1,521 | -77+1 / -78 | 4W / 5L |
| Mar 31, 2018 | OCTTA April 2018 OpenTournament · View matches | 1,612 | 1,598 | -14+0 / -14 | 1W / 9L |
| Mar 24, 2018 | 2018 TT&M March MadnessTournament · View matches | 1,634 | 1,612 | -22+8 / -30 | 7W / 7L |
| Feb 24, 2018 | 2018 Arizona Open & Giant Round RobinTournament · View matches | 1,587 | 1,634 | +47+50 / -3 | 6W / 6L |
| Dec 17, 2017 | US OpenTournament · View matches | 1,604 | 1,587 | -17+29 / -46 | 6W / 8L |
| Dec 2, 2017 | 2017 Valley of the Sun OpenTournament · View matches | 1,589 | 1,604 | +15+19 / -4 | 4W / 7L |
| Oct 28, 2017 | TT&M 2017 Spooky OpenTournament · View matches | 1,578 | 1,589 | +11+11 / 0 | 8W / 2L |
| Sep 23, 2017 | 2017 Best of the West OpenTournament · View matches | 1,566 | 1,578 | +12+34 / -22 | 5W / 7L |
| Sep 2, 2017 | 2017 JOOLA LA Open TournamentTournament · View matches | 1,740 | 1,566 | -174+7 / -181 | 4W / 5L |
| Aug 26, 2017 | Lee Rittenburg Memorial Cup August 2017Tournament · View matches · USATT readjusted 1,461 → 1,704 | 1,461 | 1,740 | +36+46 / -10 | 3W / 4L |
| Aug 19, 2017 | TT&M August Open 2017Tournament · View matches | 1,485 | 1,461 | -24+4 / -28 | 4W / 3L |
| Jul 22, 2017 | 2017 Arizona Sizzler OpenTournament · View matches | 1,497 | 1,485 | -12+29 / -41 | 4W / 10L |
| Jun 24, 2017 | TT&M June OpenTournament · View matches | 1,523 | 1,497 | -26+5 / -31 | 5W / 5L |
| May 27, 2017 | San Diego Open III 10K TournamentTournament · View matches | 1,553 | 1,523 | -30+35 / -65 | 2W / 2L |
| Apr 29, 2017 | 2017 Arizona ClosedTournament · View matches | 1,567 | 1,553 | -14+32 / -46 | 5W / 5L |
| Mar 19, 2017 | TT&M March MadnessTournament · View matches | 1,566 | 1,567 | +1+20 / -19 | 3W / 4L |
| Feb 18, 2017 | 2017 Arizona Open & Giant RRTournament · View matches · USATT readjusted 1,251 → 1,512 | 1,251 | 1,566 | +54+76 / -22 | 4W / 5L |
| Dec 3, 2016 | 2016 Valley of the Sun OpenTournament · View matches · USATT readjusted 1,167 → 1,218 | 1,167 | 1,251 | +33+42 / -9 | 8W / 6L |