PLAYER PAGE
John Mostert
1200328612Tshwane (GTP)Personal
Main rating
| Rating | 1122.7 |
| K-factor | 40 |
| Floor | 699 |
| Highest | 1199 (2025-09-30) |
| Min/Max +/- allowed | 166 |
| Rating Change () | |
| Games | 4 |
| Score | 0 |
| We | 1.29 |
| SWe | -1.07 |
| Temp +/- | -42.7 |
| Penalties | 0 |
| Weight perform | 945.6 |
| Final +/- | -42.7 |
| New Rating () | |
| Rating | 1079.9 |
| K-factor | 40 |
| Floor | 699 |
| Highest | 1199 (2025-09-30) |
| Min/Max +/- allowed | 166.1 |
Standard rating
| Rating | 1114 |
| K-factor | 40 |
| Floor | 699 |
| Highest | 1199 (2025-09-30) |
| Min/Max +/- allowed | 166.1 |
| Rating Change () | |
| Games | 4 |
| Score | 0 |
| We | 1.25 |
| SWe | -1.25 |
| Temp +/- | -49.8 |
| Penalties | 0 |
| Weight perform | 945.6 |
| Final +/- | -49.8 |
| New Rating () | |
| Rating | 1064.2 |
| K-factor | 40 |
| Floor | 699 |
| Highest | 1199 (2025-09-30) |
| Min/Max +/- allowed | 166.1 |
Rapid rating
| Rating | 1200 |
| K-factor | 40 |
| Floor | 700 |
| Highest | 1199 (2025-09-30) |
| Min/Max +/- allowed | 166.1 |
| 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 | 40 |
| Floor | 700 |
| Highest | 1199 (2025-09-30) |
| Min/Max +/- allowed | 166.1 |
Blitz rating
| Rating | 1200 |
| K-factor | 40 |
| Floor | 700 |
| Highest | 1199 (2025-09-30) |
| Min/Max +/- allowed | 166.1 |
| 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 | 40 |
| Floor | 700 |
| Highest | 1199 (2025-09-30) |
| Min/Max +/- allowed | 166.1 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | 2026 KSNG Open Chess Tournament (U8+U10) | Standard | 2026-04-18 | 2026-04-18 | Tshwane (GTP) | 5 | 1122.7 | 4 | 0 | 850.7 | -42.7 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | 2026 Lubowski Open Chess Tournament (E+F) | Standard | 2026-03-21 | 2026-03-21 | Tshwane (GTP) | 5 | 1168.4 | 5 | 1.5 | 1033.8 | -31.4 | Details |
| 2 | 2026 Silver Lakes Open Chess Tournament (U8) | Standard | 2026-03-07 | 2026-03-07 | Tshwane (GTP) | 4 | 1168.4 | 3 | 1 | 1058.3 | -14.3 | Details |
| 3 | 2026 Tshwane Chess Registration Tournament (U8) | Standard | 2026-01-31 | 2026-01-31 | Tshwane (GTP) | 5 | 1175.6 | 5 | 1 | 971.8 | -19.3 | Details |
| 4 | 2025 Centurion Chess Open Tournament (U8) | Standard | 2025-09-27 | 2025-09-27 | Tshwane (GTP) | 5 | 1200 | 5 | 0 | 853.2 | -33.2 | Details |
Game statistics ( )
| Games | 4 |
| Wins | 0 |
| Draws | 0 |
| Losses | 4 |
| White | 2 |
| Black | 2 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | -425 |
| AOR | 1275.7 |
| Performance | 850.7 |
Game statistics ()
| Games | 17 |
| Wins | 3 |
| Draws | 1 |
| Losses | 13 |
| White | 9 |
| Black | 8 |
| White wins | 3 |
| Black wins | 0 |
| Score | 3.5 |
| Percent | 20.6 |
| Dp | -250 |
| AOR | 1226.8 |
| Performance | 976.8 |
Game statistics (History)
| Games | 22 |
| Wins | 3 |
| Draws | 1 |
| Losses | 18 |
| White | 11 |
| Black | 11 |
| White wins | 3 |
| Black wins | 0 |
| Score | 3.5 |
| Percent | 15.9 |
| Dp | -289.8 |
| AOR | 1238.5 |
| Performance | 948.7 |
Rankings (Main)
| National | |
| Overall | 18296 |
| Gender | 13660 |
| Age group | 151 |
| Gender/Age | 104 |
| Provincial | |
| Overall | 5738 |
| Gender | 4268 |
| Age group | 26 |
| Gender/Age | 20 |
| Regional | |
| Overall | 1719 |
| Gender | 1294 |
| Age group | 5 |
| Gender/Age | 3 |
Rankings (Standard)
| National | |
| Overall | 13900 |
| Gender | 10297 |
| Age group | 106 |
| Gender/Age | 77 |
| Provincial | |
| Overall | 4722 |
| Gender | 3482 |
| Age group | 24 |
| Gender/Age | 18 |
| Regional | |
| Overall | 1644 |
| Gender | 1237 |
| Age group | 5 |
| Gender/Age | 3 |
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 | 4 |
| Score | 0 |
| Percent | 0 |
| Aor | 1275.7 |
| Dp | -425 |
| Prat | 850.7 |
Performance ()
| Games | 17 |
| Score | 3.5 |
| Percent | 20.6 |
| Aor | 1226.8 |
| Dp | -250 |
| Prat | 976.8 |
Performance (12 months)
| Games | 22 |
| Score | 3.5 |
| Percent | 15.9 |
| Aor | 1238.5 |
| Dp | -289.8 |
| Prat | 948.7 |
Performance (History)
| Games | 22 |
| Score | 3.5 |
| Percent | 15.9 |
| Aor | 1238.5 |
| Dp | -289.8 |
| Prat | 948.7 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Jansen Van Vuuren, J (Jaelyn) | 2 | 1 | 1 | 2026 Silver Lakes Open Chess Tournament (U8) | 2026 Lubowski Open Chess Tournament (E+F) | Details |
| Standard | 1 | Jansen Van Vuuren, J (Jaelyn) | 2 | 1 | 1 | 2026 Silver Lakes Open Chess Tournament (U8) | 2026 Lubowski Open Chess Tournament (E+F) | Details |