Player record

Kosan, Martin

ID 28380CAMaleInactive
Current rating2,290
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Wins

83

Indexed tournament wins

Losses

25

Indexed tournament losses

Matches

108

Decisive results

Win rate

76.9%

Across indexed matches

Peak rating

2,379

Highest rating in the available history.

Biggest upset

Zheng, Jiaqi

Sacramento Spring Open · May 31, 2008 · +143 rating

Open →

Biggest loss

Tu, Truong Manh

Sacramento Spring Open · May 12, 2007 · -312 rating

Open →

Most frequent opponent

Auria Malek

5 matches

Open →

Rating trajectory

Published rating movement across recorded events.

Tournament history

18 tournament appearances · synced Aug 11, 2026, 2:16 AM

DateTournamentRating inRating afterPoints changedRecord
Sep 20, 2008Sacramento Summer OpenTournament · View matches2,3252,290-35+3 / -384W / 2L
May 31, 2008Sacramento Spring OpenTournament · View matches2,2942,325+31+64 / -337W / 3L
Mar 1, 2008Sacramento Winter OpenTournament · View matches2,3042,294-10+0 / -103W / 2L
Nov 3, 2007Sacramento Fall OpenTournament · View matches2,3462,304-42+3 / -453W / 2L
May 12, 2007Sacramento Spring OpenTournament · View matches2,3712,346-25+0 / -251W / 1L
Sep 30, 2006Biggest Little Reno-Sparks OpenTournament · View matches2,3742,371-3+0 / -34W / 1L
Jul 22, 2006Sacramento Summer OpenTournament · View matches2,3682,374+6+13 / -77W / 2L
Apr 22, 2006Sacramento Spring OpenTournament · View matches2,3792,368-11+2 / -132W / 1L
Sep 17, 2005Biggest Little Reno-Sparks OpeTournament · View matches2,3682,379+11+11 / 04W / 0L
Aug 6, 2005Sacramento Summer OpenTournament · View matches2,3432,368+25+32 / -710W / 1L
Jun 12, 2005Golden State OpenTournament · View matches2,3452,343-2+6 / -86W / 2L
Apr 30, 2005Sacramento Spring OpenTournament · View matches2,3432,345+2+3 / -13W / 1L
Oct 2, 2004Sacramento October OpenTournament · View matches2,3372,343+6+18 / -125W / 2L
Sep 18, 2004Reno-Sparks TT TournamentTournament · View matches2,3302,337+7+11 / -43W / 1L
Aug 15, 2004San Francisco Summer OpenTournament · View matches2,3502,330-20+6 / -264W / 2L
May 3, 2003Sacramento Spring OpenTournament · View matches2,3392,350+11+15 / -45W / 1L
Feb 15, 2003Sacramento Winter OpenTournament · View matches2,3032,339+36+36 / 04W / 0L
Nov 16, 2002Sacramento Fall OpenTournament · View matches · Initial rating 2,303Unrated2,303+21+29 / -88W / 1L