Wins
78
Indexed tournament wins
Player record
Ko, Sean
Losses
78
Indexed tournament losses
Matches
156
Decisive results
Win rate
50.0%
Across indexed matches
Peak rating
1,506
Highest rating in the available history.
Biggest upset
Chartrand, Rick
2014 Fall Open · Nov 22, 2014 · +335 rating
Open →Biggest loss
Larrazabal, Gabriel
2nd Annual Mac Horn Memorial · Aug 12, 2023 · -507 rating
Open →Most frequent opponent
Longpre, Luc
15 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
17 tournament appearances · synced Aug 8, 2026, 2:19 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Nov 11, 2023 | 7th Annual Mark Nordby MemorialTournament · View matches | 1,309 | 1,303 | -6+44 / -50 | 5W / 5L |
| Aug 12, 2023 | 2nd Annual Mac Horn MemorialTournament · View matches | 1,369 | 1,309 | -60+35 / -95 | 7W / 3L |
| Dec 3, 2022 | 6th Annual Mark Nordby MemorialTournament · View matches | 1,331 | 1,369 | +38 | 7W / 3L |
| Jul 23, 2022 | 1st Annual Mac Horn MemorialTournament · View matches | 1,456 | 1,331 | -125 | 5W / 5L |
| Aug 25, 2018 | 6th Annual Robert Bluestone Memorial Tournament · View matches | 1,463 | 1,456 | -7+0 / -7 | 0W / 6L |
| Nov 5, 2016 | 1st Annual Mark Nordby MemorialTournament · View matches | 1,486 | 1,463 | -23+11 / -34 | 4W / 4L |
| Feb 27, 2016 | 2016 U.S. Recession Fighter Open VIITournament · View matches | 1,506 | 1,486 | -20+7 / -27 | 3W / 5L |
| Nov 21, 2015 | 7th Annual 2015 Fall OpenTournament · View matches | 1,505 | 1,506 | +1+24 / -23 | 5W / 3L |
| Nov 22, 2014 | 2014 Fall OpenTournament · View matches | 1,280 | 1,505 | +225 | 3W / 5L |
| May 10, 2014 | 3rd Annual Robert Bluestone Memorial EventTournament · View matches | 1,279 | 1,280 | +1+7 / -6 | 1W / 6L |
| Feb 15, 2014 | US Recession Fighter Open VTournament · View matches | 1,251 | 1,279 | +28+44 / -16 | 4W / 6L |
| Nov 9, 2013 | 2013 Fall OpenTournament · View matches | 1,255 | 1,251 | -4+21 / -25 | 6W / 3L |
| Aug 17, 2013 | 2013 Summer Slam VTournament · View matches | 1,275 | 1,255 | -20+10 / -30 | 5W / 3L |
| Nov 10, 2012 | El Paso Fall OpenTournament · View matches | 1,322 | 1,275 | -47+2 / -49 | 2W / 5L |
| May 12, 2012 | The Robert Bluestone Memorial Spring Open IVTournament · View matches | 1,090 | 1,322 | +232 | 4W / 5L |
| Feb 4, 2012 | Recession Fighter IIITournament · View matches | 930 | 1,090 | +160 | 6W / 6L |
| Feb 20, 2010 | US Recession Fighter OpenTournament · View matches · Initial rating 930 | Unrated | 930 | — | 11W / 5L |
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