Wins
350
Indexed tournament wins
Player record
Hiroshi Koshimoto
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 8, 2026, 3:34 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Apr 26, 1998 | Thousand Oaks TTCTournament · View matches | 1,319 | 1,404 | +85 | 4W / 7L |
| Mar 29, 1998 | Colorado River OpenTournament · View matches | 1,280 | 1,319 | +39 | 6W / 14L |
| Dec 21, 1997 | US NationalsTournament · View matches | 1,315 | 1,280 | -35+8 / -43 | 2W / 13L |
| Sep 21, 1997 | Lake HavasuTournament · View matches | 1,299 | 1,315 | +16 | 2W / 12L |
| Sep 7, 1997 | Pacific Coast OpenTournament · View matches | 1,299 | 1,299 | 0+0 / 0 | 0W / 5L |
| Jul 6, 1997 | U.S. OpenTournament · View matches | 1,393 | 1,299 | -94+0 / -94 | 1W / 13L |
| Jun 22, 1997 | California State OpenTournament · View matches | 1,406 | 1,393 | -13+0 / -13 | 0W / 5L |
| Jun 8, 1997 | Meiklejohn Nat'l Seniors TTTTournament · View matches | 1,393 | 1,406 | +13+13 / 0 | 1W / 4L |
| Apr 27, 1997 | Thousand Oaks ClassicTournament · View matches | 1,388 | 1,393 | +5+13 / -8 | 1W / 2L |
| Mar 16, 1997 | Hawthorne/Northrop OpenTournament · View matches | 1,422 | 1,388 | -34+0 / -34 | 0W / 4L |
| Feb 23, 1997 | 1997 Arizona OpenTournament · View matches | 1,488 | 1,422 | -66+2 / -68 | 1W / 15L |
| Nov 3, 1996 | Pacific Coast Memorial OpenTournament · View matches | 1,463 | 1,488 | +25+35 / -10 | 1W / 4L |
| Sep 22, 1996 | Lake Havasu Open TTTTournament · View matches | 1,392 | 1,463 | +71 | 5W / 10L |
| Jul 7, 1996 | 1996 US OpenTournament · View matches | 1,416 | 1,392 | -24+3 / -27 | 1W / 12L |
| Jun 23, 1996 | California State OpenTournament · View matches | 1,424 | 1,416 | -8 | 0W / 4L |
| Jun 9, 1996 | Meiklejohn National Seniors TTTournament · View matches | 1,476 | 1,424 | -52+0 / -52 | 0W / 4L |
| May 5, 1996 | Hawthorne TTTTournament · View matches | 1,501 | 1,476 | -25+0 / -25 | 0W / 4L |
| Dec 18, 1995 | USATT National ChampionshipsTournament · View matches | 1,585 | 1,501 | -84+0 / -84 | 2W / 11L |
| Jul 9, 1995 | US OpenTournament · View matches | 1,586 | 1,585 | -1+25 / -26 | 1W / 4L |
| Jul 3, 1995 | MeikleJohn National SeniorsTournament · View matches | 1,598 | 1,586 | -12+0 / -12 | 0W / 3L |