PLAYER PAGE
Joha Viljoen
1120316249Cape Winelands (WCW)Personal
Main rating
| Rating | 1144.2 |
| K-factor | 36 |
| Floor | 725.1 |
| Highest | 1225.1 (2026-03-01) |
| Min/Max +/- allowed | 160 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1078.7 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1144.2 |
| K-factor | 36 |
| Floor | 725.1 |
| Highest | 1225.1 (2026-03-01) |
| Min/Max +/- allowed | 160 |
Standard rating
| Rating | 1125.1 |
| K-factor | 36 |
| Floor | 709.5 |
| Highest | 1209.5 (2026-03-01) |
| Min/Max +/- allowed | 163.6 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1125.1 |
| K-factor | 36 |
| Floor | 709.5 |
| Highest | 1209.5 (2026-03-01) |
| Min/Max +/- allowed | 163.6 |
Rapid rating
| Rating | 1233.9 |
| K-factor | 36 |
| Floor | 733.9 |
| Highest | 1233.9 (2025-09-01) |
| Min/Max +/- allowed | 158 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1233.9 |
| K-factor | 36 |
| Floor | 733.9 |
| Highest | 1233.9 (2025-09-01) |
| Min/Max +/- allowed | 158 |
Blitz rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-03-01) |
| Min/Max +/- allowed | 165.8 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-03-01) |
| Min/Max +/- allowed | 165.8 |
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 | South African Open Championship 2026 (U15 Boys) | Classical | 2026-07-02 | 2026-07-05 | Cape Town (WCT) | 7 | 1209.5 | 7 | 1.5 | 992 | -65.2 | Details |
| 2 | CTCF Open Championship 2026 (U16) | Classical | 2026-06-13 | 2026-06-14 | Cape Town (WCT) | 6 | 1225.1 | 6 | 2 | 1164.3 | -15.7 | Details |
| 3 | Cape Winelands Schools - High School Trials 1 2026 (U15 Boys) | Standard | 2026-02-28 | 2026-02-28 | Cape Winelands | 5 | 1223 | 5 | 2.5 | 1242.4 | 2.1 | Details |
| 4 | Stellenbosch Primary 2025 (U13) | Rapid | 2025-08-16 | 2025-08-16 | Cape Winelands (WCW) | 5 | 1199.9 | 5 | 3 | 1356.2 | 11.6 | Details |
| 5 | Cape Winelands Schools - Trials 1 2025 (U13 Boys) | Standard | 2025-02-22 | 2025-02-22 | Cape Winelands (WCW) | 5 | 1200 | 5 | 2 | 1130.4 | -6.1 | 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 | 18 |
| Wins | 5 |
| Draws | 2 |
| Losses | 11 |
| White | 10 |
| Black | 8 |
| White wins | 3 |
| Black wins | 2 |
| Score | 6 |
| Percent | 33.3 |
| Dp | -141.7 |
| AOR | 1260.7 |
| Performance | 1119 |
Game statistics (History)
| Games | 28 |
| Wins | 10 |
| Draws | 2 |
| Losses | 16 |
| White | 14 |
| Black | 14 |
| White wins | 5 |
| Black wins | 5 |
| Score | 11 |
| Percent | 39.3 |
| Dp | -91.1 |
| AOR | 1254.5 |
| Performance | 1163.4 |
Rankings (Main)
| National | |
| Overall | 16940 |
| Gender | 12751 |
| Age group | 3037 |
| Gender/Age | 2252 |
| Provincial | |
| Overall | 4943 |
| Gender | 3642 |
| Age group | 904 |
| Gender/Age | 670 |
| Regional | |
| Overall | 804 |
| Gender | 557 |
| Age group | 178 |
| Gender/Age | 132 |
Rankings (Standard)
| National | |
| Overall | 13059 |
| Gender | 9668 |
| Age group | 2269 |
| Gender/Age | 1663 |
| Provincial | |
| Overall | 3904 |
| Gender | 2771 |
| Age group | 659 |
| Gender/Age | 476 |
| Regional | |
| Overall | 663 |
| Gender | 448 |
| Age group | 139 |
| Gender/Age | 97 |
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 | 18 |
| Score | 6 |
| Percent | 33.3 |
| Aor | 1260.7 |
| Dp | -141.7 |
| Prat | 1119 |
Performance (12 months)
| Games | 18 |
| Score | 6 |
| Percent | 33.3 |
| Aor | 1260.7 |
| Dp | -141.7 |
| Prat | 1119 |
Performance (History)
| Games | 28 |
| Score | 11 |
| Percent | 39.3 |
| Aor | 1254.5 |
| Dp | -91.1 |
| Prat | 1163.4 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Pennell, K (Kristian) | 2 | 2 | 0 | CTCF Open Championship 2026 (U16) | South African Open Championship 2026 (U15 Boys) | Details |
| Standard | 1 | Pennell, K (Kristian) | 2 | 2 | 0 | CTCF Open Championship 2026 (U16) | South African Open Championship 2026 (U15 Boys) | Details |