PLAYER PAGE
Johann Martin Fredrich Keller
195015095Nelson Mandela Bay (ENM)Personal
Main rating
| Rating | 1536.1 |
| K-factor | 32 |
| Floor | 1036.1 |
| Highest | 1536.1 (2025-11-01) |
| Min/Max +/- allowed | 103 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1536.1 |
| K-factor | 32 |
| Floor | 1036.1 |
| Highest | 1536.1 (2025-11-01) |
| Min/Max +/- allowed | 102.7 |
Standard rating
| Rating | 1533.2 |
| K-factor | 32 |
| Floor | 1033.2 |
| Highest | 1533.2 (2025-11-01) |
| Min/Max +/- allowed | 103.1 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1533.2 |
| K-factor | 32 |
| Floor | 1033.2 |
| Highest | 1533.2 (2025-11-01) |
| Min/Max +/- allowed | 103.1 |
Rapid rating
| Rating | 1491 |
| K-factor | 32 |
| Floor | 991 |
| Highest | 1491 (2024-02-01) |
| Min/Max +/- allowed | 109.5 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1491 |
| K-factor | 32 |
| Floor | 991 |
| Highest | 1491 (2024-02-01) |
| Min/Max +/- allowed | 109.5 |
Blitz rating
| Rating | 1491 |
| K-factor | 32 |
| Floor | 991 |
| Highest | 1491 (2024-02-01) |
| Min/Max +/- allowed | 109.5 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1491 |
| K-factor | 32 |
| Floor | 991 |
| Highest | 1491 (2024-02-01) |
| Min/Max +/- allowed | 109.5 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Cape Town Chess Federation Club League 2025 (C) | Classical | 2025-07-26 | 2025-09-27 | Cape Town (WCT) | 11 | 1491 | 7 | 6.5 | 1676.5 | 0 | Details |
| 2 | South African Junior Chess Championships 2009 (U 16 Boys) | Standard | 2009-12-06 | 2009-12-10 | Western Province (WP) | 9 | 1424 | 9 | 6 | 1679 | 0 | Details |
| 3 | South African Junior Team Championships 2009 (U 16 C-Section) | Standard | 2009-12-01 | 2009-12-05 | Western Province (WP) | 7 | 1392 | 5 | 5 | 1609 | 0 | Details |
| 4 | Sandy Matthews Memorial 2009 | Standard | 2009-07-20 | 2009-07-20 | Eastern Province (EP) | 7 | 1341 | 7 | 4.5 | 1462 | 0 | Details |
| 5 | 2009 Ep Trials Under 16 | Standard | 2009-06-08 | 2009-06-08 | Eastern Province (EP) | 7 | 1344 | 6 | 4 | 1340 | 0 | Details |
| 6 | 2009 Pe Under 16 | Standard | 2009-05-18 | 2009-05-18 | Eastern Province (EP) | 7 | 1382 | 7 | 3.5 | 1234 | 0 | Details |
| 7 | South African Junior Championships 2008 (U14 Boys) | Standard | 2008-12-18 | 2008-12-18 | Western Province (WP) | 9 | 1351 | 9 | 5.5 | 1370 | 0 | Details |
| 8 | South African Junior Team Championships 2008 (U14 | Standard | 2008-12-18 | 2008-12-18 | Western Province (WP) | 7 | 1351 | 7 | 5 | 1531 | 0 | Details |
| 9 | Ep Open 2008 (Open Section) | Blitz | 2008-05-14 | 2008-05-14 | 0 | 1324 | 6 | 0 | 1527 | 0 | Details | |
| 10 | Pe Under 14 (A Section) | Blitz | 2008-05-27 | 2008-05-27 | 0 | 1354 | 7 | 0 | 1247 | 0 | Details | |
| 11 | Under 14 Ep Trials 2008 | Blitz | 2008-08-02 | 2008-08-02 | 0 | 1348 | 7 | 0 | 1358 | 0 | Details |
Game statistics ( )
| Games | 0 |
| Wins | 0 |
| Draws | 0 |
| Losses | 0 |
| White | 0 |
| Black | 0 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | 0 |
| AOR | 0 |
| Performance | 0 |
Game statistics ()
| Games | 0 |
| Wins | 0 |
| Draws | 0 |
| Losses | 0 |
| White | 0 |
| Black | 0 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | 0 |
| AOR | 0 |
| Performance | 0 |
Game statistics (History)
| Games | 7 |
| Wins | 6 |
| Draws | 1 |
| Losses | 0 |
| White | 5 |
| Black | 2 |
| White wins | 5 |
| Black wins | 1 |
| Score | 6.5 |
| Percent | 92.9 |
| Dp | 364.3 |
| AOR | 1312.2 |
| Performance | 1676.5 |
Rankings (Main)
| National | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Provincial | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Regional | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
Rankings (Standard)
| National | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Provincial | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Regional | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
Rankings (Rapid)
| National | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Provincial | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Regional | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
Rankings (Blitz)
| National | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Provincial | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
| Regional | |
| Overall | -1 |
| Gender | -1 |
| Age group | -1 |
| Gender/Age | -1 |
Performance ( )
| Games | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance ()
| Games | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance (12 months)
| Games | 7 |
| Score | 6.5 |
| Percent | 92.9 |
| Aor | 1312.2 |
| Dp | 364.3 |
| Prat | 1676.5 |
Performance (History)
| Games | 7 |
| Score | 6.5 |
| Percent | 92.9 |
| Aor | 1312.2 |
| Dp | 364.3 |
| Prat | 1676.5 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |