Player record

Koyama, Nobuhiko

ID 13784VAMaleInactive
Current rating1,712
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Wins

340

Indexed tournament wins

Losses

319

Indexed tournament losses

Matches

659

Decisive results

Win rate

51.6%

Across indexed matches

Peak rating

1,716

Highest rating in the available history.

Biggest upset

Tan, Carl

2010 JOOLA N. American Teams · Nov 28, 2010 · +303 rating

Open →

Biggest loss

Gomez, Ashley

2008 JOOLA American Teams Open · Nov 30, 2008 · -670 rating

Open →

Most frequent opponent

Van Dusen, Philip

15 matches

Open →

Rating trajectory

Published rating movement across recorded events.

Tournament history

73 tournament appearances · synced Aug 11, 2026, 2:19 AM

DateTournamentRating inRating afterPoints changedRecord
Mar 12, 2000Maryland March CircuitTournament · View matches1,5811,498-83+9 / -922W / 7L
Nov 28, 19991999 NA Teams 2Tournament · View matches1,3441,581+2378W / 2L
Nov 21, 1999NJTTC November OpenTournament · View matches1,3481,344-4+2 / -61W / 2L
Oct 17, 1999NJTTC October OpenTournament · View matches1,3331,348+15+18 / -35W / 2L
Sep 19, 1999NJTTC September OpenTournament · View matches1,3081,333+25+29 / -42W / 1L
Aug 1, 19991999 Champion TTC Summer OpenTournament · View matches1,2881,308+205W / 6L
Jul 4, 19991999 US OpenTournament · View matches1,2841,288+4+6 / -23W / 6L
May 23, 1999NJTTC May OpenTournament · View matches1,2641,284+20+20 / 05W / 0L
May 2, 1999NJTTC May OpenTournament · View matches1,2551,264+9+15 / -63W / 1L
Apr 4, 1999Spin OpenTournament · View matches1,2541,255+1+8 / -73W / 1L
Mar 21, 1999NJTTC March OpenTournament · View matches1,2561,254-2+0 / -21W / 1L
Feb 28, 1998Baystate Winter OpenTournament · View matches1,2591,256-33W / 2L
Apr 20, 1997Rennselaer OpenTournament · View matches · Initial rating 1,259Unrated1,259-3+6 / -91W / 2L