Wins
61
Indexed tournament wins
Player record
Kostkowski, Betty
Losses
336
Indexed tournament losses
Matches
397
Decisive results
Win rate
15.4%
Across indexed matches
Peak rating
963
Highest rating in the available history.
Biggest upset
Summers, Dan
Maryland State Closed · Mar 24, 2001 · +989 rating
Open →Biggest loss
Doctolero, Jordan
Maryland May Circuit - Giant R · May 26, 2001 · -593 rating
Open →Most frequent opponent
Michael Branch
55 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
61 tournament appearances · synced Aug 13, 2026, 2:38 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Oct 27, 2001 | Maryland Oct. Circuit - Giant Tournament · View matches | 643 | 607 | -36+0 / -36 | 0W / 8L |
| Sep 22, 2001 | Maryland Sept. Circuit - GiantTournament · View matches | 674 | 643 | -31+8 / -39 | 2W / 7L |
| Aug 25, 2001 | Maryland Aug. Circuit - Giant Tournament · View matches | 687 | 674 | -13+0 / -13 | 0W / 7L |
| Jun 23, 2001 | Maryland June Circuit - Giant Tournament · View matches | 738 | 687 | -51+2 / -53 | 1W / 4L |
| Jun 17, 2001 | Matthew Murad Memorial Open - Tournament · View matches | 783 | 738 | -45+3 / -48 | 1W / 2L |
| May 26, 2001 | Maryland May Circuit - Giant RTournament · View matches | 963 | 783 | -180+0 / -180 | 2W / 5L |
| Mar 24, 2001 | Maryland State ClosedTournament · View matches | 500 | 963 | +463 | 2W / 2L |
| Feb 24, 2001 | Maryland Feb. Circuit Giant RRTournament · View matches | 506 | 500 | -6 | 3W / 5L |
| Jan 27, 2001 | Maryland Jan. Circuit Giant RRTournament · View matches | 529 | 506 | -23 | 0W / 8L |
| Oct 28, 2000 | Maryland October Circuit TeamsTournament · View matches | 504 | 529 | +25+25 / 0 | 1W / 6L |
| Apr 29, 2000 | Maryland April Circuit TeamsTournament · View matches | 507 | 504 | -3+0 / -3 | 0W / 3L |
| Jul 11, 1999 | Maryland July CircuitTournament · View matches | 569 | 507 | -62 | 0W / 6L |
| Jun 6, 1999 | Maryland June CircuitTournament · View matches | 468 | 569 | +101 | 3W / 5L |
| Apr 11, 1999 | Maryland April CircuitTournament · View matches | 446 | 468 | +22 | 2W / 2L |
| Nov 15, 1998 | MDTTC November OpenTournament · View matches | 460 | 446 | -14+0 / -14 | 0W / 3L |
| Feb 8, 1998 | Maryland CircuitTournament · View matches | 461 | 460 | -1+0 / -1 | 0W / 7L |
| Oct 5, 1997 | Maryland October CircuitTournament · View matches | 462 | 461 | -1+0 / -1 | 0W / 5L |
| Sep 14, 1997 | Maryland Sept CircuitTournament · View matches | 462 | 462 | 0+0 / 0 | 0W / 3L |
| Jun 29, 1997 | Maryland Closed ChampionshipsTournament · View matches | 462 | 462 | 0+0 / 0 | 0W / 3L |
| Apr 13, 1997 | Maryland April CircuitTournament · View matches | 495 | 462 | -33 | 1W / 3L |