Player record

Hiroshi Koshimoto

ID 59772CAMaleActive
Current rating1,519
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Wins

350

Indexed tournament wins

Losses

981

Indexed tournament losses

Matches

1,331

Decisive results

Win rate

26.3%

Across indexed matches

Peak rating

1,672

Highest rating in the available history.

Biggest upset

Rowe, Larry

US Nationals · Dec 18, 1994 · +662 rating

Open →

Biggest loss

Trudell, Robert

Colorado River Open · Mar 28, 1999 · -658 rating

Open →

Most frequent opponent

Al Miller

9 matches

Open →

Rating trajectory

Published rating movement across recorded events.

Tournament history

113 tournament appearances · synced Aug 9, 2026, 4:22 AM

DateTournamentRating inRating afterPoints changedRecord
Mar 12, 1995Hawthorne/Northrop OpenTournament · View matches1,5981,5980+0 / 00W / 1L
Feb 5, 1995Dr. Wang Chinese New Year OpenTournament · View matches1,6351,598-37+0 / -370W / 4L
Jan 28, 1995Calvary Chapel OpenTournament · View matches1,6701,635-35+0 / -350W / 2L
Dec 18, 1994US NationalsTournament · View matches1,4181,670+2528W / 7L
Nov 27, 1994Rialto Fall OpenTournament · View matches1,3871,418+31+77 / -464W / 6L
Nov 20, 1994Pacific Coast OpenTournament · View matches1,3651,387+22+22 / 02W / 4L
Jul 4, 1994US OpenTournament · View matches1,3251,365+40+53 / -132W / 8L
Jun 27, 1994Meikle John National Seniors OTournament · View matches1,2821,325+43+50 / -74W / 5L
Jun 5, 1994West Covina 1994 OpenTournament · View matches1,3281,282-46+10 / -561W / 5L
Apr 24, 1994Thousand Oaks ClassicTournament · View matches1,3731,328-45+0 / -451W / 5L
Apr 9, 1994Rialto Spring OpenTournament · View matches1,3241,373+49+64 / -153W / 6L
Mar 20, 19941994 Chinese New Year All StarTournament · View matches1,3501,324-260W / 4L
Mar 13, 1994Hawthorne/Northrop OpenTournament · View matches1,3651,350-150W / 5L