Player record

Mandelbaum, Sean

ID 85869ORMaleInactive
Current rating1,582
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Wins

58

Indexed tournament wins

Losses

39

Indexed tournament losses

Matches

97

Decisive results

Win rate

59.8%

Across indexed matches

Peak rating

1,582

Highest rating in the available history.

Biggest upset

Frank Correa

2011 Pacific Rim Open · Nov 6, 2011 · +404 rating

Open →

Biggest loss

Bunker, Michael

2013 Pacific Rim Open · Nov 3, 2013 · -271 rating

Open →

Most frequent opponent

Bi, Alan

3 matches

Open →

Rating trajectory

Published rating movement across recorded events.

Tournament history

8 tournament appearances · synced Aug 10, 2026, 2:20 AM

DateTournamentRating inRating afterPoints changedRecord
Nov 3, 20132013 Pacific Rim OpenTournament · View matches1,3901,582+19213W / 4L
Jun 9, 20132013 Rose City OpenTournament · View matches1,3511,390+397W / 4L
Mar 16, 20137th Annual Bill Mason Memorial OpenTournament · View matches1,3471,351+46W / 1L
Nov 4, 20122012 Pacific Rim OpenTournament · View matches1,3201,347+277W / 7L
Jun 10, 20122012 Rose City OpenTournament · View matches · USATT readjusted 1,213 → 1,2641,2131,320+56+91 / -359W / 4L
Nov 6, 20112011 Pacific Rim OpenTournament · View matches · USATT readjusted 920 → 1,1379201,213+76+92 / -168W / 7L
Aug 13, 2011Under 1200 Open Ratings TournamentTournament · View matches922920-2+11 / -135W / 3L
Jun 12, 20112011 Rose City OpenTournament · View matches · Initial rating 922Unrated922—3W / 9L