Wins
598
Indexed tournament wins
Player record
Mark Kobernick
Losses
433
Indexed tournament losses
Matches
1,031
Decisive results
Win rate
58.0%
Across indexed matches
Peak rating
1,857
Highest rating in the available history.
Biggest upset
Tan, Rendinald
Tri-Cities Fall Open Double RR · Oct 19, 2008 · +436 rating
Open →Biggest loss
Pifer, Fletcher
2009 Rose City Open · Jun 28, 2009 · -910 rating
Open →Most frequent opponent
Mason, William
21 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
104 tournament appearances · synced Aug 8, 2026, 3:32 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Apr 16, 2000 | Tri-City Open Spring Double RRTournament · View matches | 1,814 | 1,799 | -15+6 / -21 | 5W / 4L |
| Mar 25, 2000 | Portland Double RR OpenTournament · View matches | 1,800 | 1,814 | +14+24 / -10 | 7W / 3L |
| Dec 19, 1999 | US NationalsTournament · View matches | 1,687 | 1,800 | +113 | 13W / 9L |
| Dec 4, 1999 | Portland Double RR OpenTournament · View matches | 1,667 | 1,687 | +20+25 / -5 | 6W / 2L |
| Aug 7, 1999 | Portland Summer Double RR OpenTournament · View matches | 1,673 | 1,667 | -6+0 / -6 | 0W / 4L |
| Jul 4, 1999 | 1999 US OpenTournament · View matches | 1,656 | 1,673 | +17+29 / -12 | 7W / 13L |
| Jun 19, 1999 | 3-Man Team OpenTournament · View matches | 1,646 | 1,656 | +10+14 / -4 | 6W / 2L |
| Apr 24, 1999 | 1999 Overseas Chinese OpenTournament · View matches | 1,679 | 1,646 | -33 | 2W / 4L |
| Jan 23, 1999 | Portland Giant RRTournament · View matches | 1,644 | 1,679 | +35+39 / -4 | 11W / 3L |
| Oct 18, 1998 | Tri-Cities Fall Open RRTournament · View matches | 1,689 | 1,644 | -45+5 / -50 | 5W / 5L |
| Sep 12, 1998 | Portland Late Summer Double RRTournament · View matches | 1,642 | 1,689 | +47+53 / -6 | 5W / 3L |
| Jul 18, 1998 | Portland Open July 98 Double RTournament · View matches | 1,664 | 1,642 | -22+31 / -53 | 5W / 4L |
| Jun 6, 1998 | Portland Double RR, U.S. Open Tournament · View matches | 1,677 | 1,664 | -13+7 / -20 | 3W / 4L |
| May 2, 1998 | Portland Double RRTournament · View matches | 1,711 | 1,677 | -34+22 / -56 | 6W / 4L |
| Apr 19, 1998 | Tri-Cities Spring RRTournament · View matches | 1,732 | 1,711 | -21+8 / -29 | 7W / 3L |
| Apr 4, 1998 | '98 Overseas Chinese OpenTournament · View matches | 1,748 | 1,732 | -16 | 2W / 4L |
| Mar 29, 1998 | Portland TT March BashTournament · View matches | 1,797 | 1,748 | -49 | 6W / 5L |
| Feb 28, 1998 | Two-Man Team RRTournament · View matches | 1,857 | 1,797 | -60+0 / -60 | 2W / 3L |
| Jan 24, 1998 | Portland Giant RRTournament · View matches | 1,837 | 1,857 | +20 | 13W / 3L |
| Dec 21, 1997 | US NationalsTournament · View matches · USATT readjusted 1,684 → 1,808 | 1,684 | 1,837 | +29+95 / -66 | 7W / 8L |