PLAYER PAGE
Johandre Viljoen
1110158449West Rand (GWR)Personal
Main rating
| Rating | 1423 |
| K-factor | 32 |
| Floor | 931.2 |
| Highest | 1431.2 (2026-06-01) |
| Min/Max +/- allowed | 119 |
| Rating Change () | |
| Games | 10 |
| Score | 5 |
| We | 6.53 |
| SWe | -1.48 |
| Temp +/- | -47.4 |
| Penalties | 0 |
| Weight perform | 1341.9 |
| Final +/- | -47.4 |
| New Rating () | |
| Rating | 1375.6 |
| K-factor | 32 |
| Floor | 931.2 |
| Highest | 1431.2 (2026-06-01) |
| Min/Max +/- allowed | 119.3 |
Standard rating
| Rating | 1424.1 |
| K-factor | 32 |
| Floor | 931.2 |
| Highest | 1431.2 (2026-06-01) |
| Min/Max +/- allowed | 119.3 |
| Rating Change () | |
| Games | 5 |
| Score | 2 |
| We | 2.28 |
| SWe | -0.28 |
| Temp +/- | -9.1 |
| Penalties | 0 |
| Weight perform | 1392.8 |
| Final +/- | -9.1 |
| New Rating () | |
| Rating | 1415 |
| K-factor | 32 |
| Floor | 931.2 |
| Highest | 1431.2 (2026-06-01) |
| Min/Max +/- allowed | 119.3 |
Rapid rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
| Rating Change () | |
| Games | 5 |
| Score | 3 |
| We | 3.25 |
| SWe | -1.08 |
| Temp +/- | -39 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | -39 |
| New Rating () | |
| Rating | 1161 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
Blitz rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| 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 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Gauteng Closed Chess Championships 2026 (U16 Open) | Standard | 2026-10-17 | 2026-10-17 | Ekurhuleni (GE) | 5 | 1423 | 5 | 2 | 1373.9 | -8.8 | Details |
| 2 | Gauteng Top Schools Teams 2026 (U17) | Rapid | 2026-08-28 | 2026-08-28 | Ekurhuleni (GE) | 5 | 1423 | 5 | 3 | 1167.9 | -28.4 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | West Rand Trials 2026 (U16) | Standard | 2026-09-05 | 2026-09-05 | West Rand (GWR) | 5 | 1401.4 | 5 | 3.5 | 1531.8 | 21.6 | Details |
| 2 | 2026 D2 Schools League Finals (U17) | Standard | 2026-08-15 | 2026-08-15 | West Rand (GWR) | 5 | 1401.4 | 5 | 3 | 1303.6 | -14.4 | Details |
| 3 | West Rand Womens Day Open 2026 (Rooks) | Standard | 2026-08-08 | 2026-08-08 | West Rand (GWR) | 5 | 1401.4 | 5 | 4 | 1451.5 | 11 | Details |
| 4 | 2026 D2 Top 20 Schools Individuals (U15) | Standard | 2026-07-25 | 2026-07-25 | West Rand (GWR) | 5 | 1408.8 | 5 | 2.5 | 1375.8 | -4 | Details |
| 5 | 2026 West Rand Open 2.0 (Rooks) | Standard | 2026-06-06 | 2026-06-06 | West Rand (GWR) | 5 | 1431.2 | 5 | 2.5 | 1293 | -22.5 | Details |
| 6 | 2026 D2 Schools Individuals (U15 Boys) | Standard | 2026-05-15 | 2026-05-16 | West Rand (GWR) | 5 | 1376.9 | 5 | 4 | 1477.3 | 14.8 | Details |
| 7 | West Rand goes to Monnas 2026 (Rooks) | Standard | 2026-05-02 | 2026-05-02 | West Rand (GWR) | 5 | 1376.9 | 5 | 3 | 1422.6 | 8.3 | Details |
| 8 | FIDE in the West 2026 (Rooks) | Standard | 2026-04-11 | 2026-04-11 | West Rand (GWR) | 5 | 1353.8 | 5 | 3 | 1385 | 6.1 | Details |
| 9 | West Rand Juniors 2026 (U16) | Standard | 2026-03-07 | 2026-03-07 | West Rand (GWR) | 5 | 1319.1 | 5 | 3.5 | 1561.4 | 34.7 | Details |
| 10 | West Rand Open 2026 (Rooks) | Standard | 2026-02-07 | 2026-02-07 | West Rand (GWR) | 5 | 1321.3 | 5 | 3 | 1367.2 | 2.4 | Details |
| 11 | Gauteng Inter-Region at Emerald Resort 2025 (U16 Championship) | Standard | 2025-12-06 | 2025-12-07 | Sedibeng (GSV) | 5 | 1326 | 5 | 0 | 1105.5 | -26.5 | Details |
| 12 | West Rand Closed 2025 (U16) | Standard | 2025-10-18 | 2025-10-18 | West Rand (GWR) | 5 | 1402.3 | 5 | 3.5 | 1560.2 | 16.1 | Details |
| 13 | 2025 Gauteng Schools Provincial Individual Chess Championship (U15 Boys) | Standard | 2025-09-27 | 2025-09-27 | Tshwane (GTP) | 5 | 1402.3 | 5 | 2 | 1276.3 | -11.6 | Details |
| 14 | Bojanala's FIDE On The Orion Express 2025 (Rooks) | Classical | 2025-10-03 | 2025-10-05 | Bojanala Platina (NBR) | 6 | 1402.3 | 6 | 1 | 959.8 | -62.2 | Details |
| 15 | West Rand Trials 2025 (U16) | Standard | 2025-09-06 | 2025-09-06 | West Rand (GWR) | 5 | 1412.9 | 5 | 2.5 | 1337.5 | -6.6 | Details |
| 16 | West Rand Women's Day Open 2025 (Rooks) | Standard | 2025-08-09 | 2025-08-09 | West Rand (GWR) | 5 | 1391.7 | 5 | 3.5 | 1533.8 | 13.3 | Details |
| 17 | 2025 D2 Schools League Finals (U15) | Standard | 2025-07-26 | 2025-07-26 | West Rand (GWR) | 5 | 1401.9 | 5 | 3 | 1342.5 | -6.3 | Details |
| 18 | West Rand Open 2.0 2025 (Rooks) | Standard | 2025-06-07 | 2025-06-07 | West Rand (GWR) | 5 | 1411.6 | 5 | 3 | 1341 | -6 | Details |
| 19 | 2025 D2 Schools Individuals (U15 Open) | Standard | 2025-05-10 | 2025-05-10 | West Rand (GWR) | 5 | 1362.4 | 5 | 4 | 1497.3 | 13.9 | Details |
| 20 | FIDE in The West 2025 (Rooks) | Standard | 2025-04-12 | 2025-04-12 | West Rand (GWR) | 5 | 1300.8 | 5 | 3 | 1474.1 | 17.6 | Details |
| 21 | West Rand Juniors 2025 (U16) | Standard | 2025-03-08 | 2025-03-08 | West Rand (GWR) | 5 | 1280.8 | 5 | 3 | 1412.8 | 11.1 | Details |
| 22 | 2025 West Rand Open (Rooks) | Standard | 2025-02-08 | 2025-02-08 | West Rand (GWR) | 5 | 1276.2 | 5 | 2 | 1310.6 | 2.5 | Details |
| 23 | D2 School League Finals 2024 (U13) | Standard | 2024-07-20 | 2024-07-20 | West Rand (GWR) | 5 | 1232.9 | 5 | 4 | 1472.1 | 24.1 | Details |
| 24 | 2024 D2 Schools Individuals (U13 Boys) | Standard | 2024-05-04 | 2024-05-04 | West Rand (GWR) | 5 | 1222.1 | 5 | 3 | 1276.2 | 6 | Details |
| 25 | D2 School League Finals 2023 (U13) | Standard | 2023-07-22 | 2023-07-22 | West Rand (GWR) | 5 | 1200 | 5 | 3 | 1333.7 | 12.3 | Details |
Game statistics ( )
| Games | 5 |
| Wins | 2 |
| Draws | 0 |
| Losses | 3 |
| White | 3 |
| Black | 2 |
| White wins | 1 |
| Black wins | 1 |
| Score | 2 |
| Percent | 40 |
| Dp | -85 |
| AOR | 1458.9 |
| Performance | 1373.9 |
Game statistics ()
| Games | 60 |
| Wins | 35 |
| Draws | 4 |
| Losses | 21 |
| White | 31 |
| Black | 29 |
| White wins | 16 |
| Black wins | 19 |
| Score | 37 |
| Percent | 61.7 |
| Dp | 99.2 |
| AOR | 1293.4 |
| Performance | 1392.6 |
Game statistics (History)
| Games | 136 |
| Wins | 73 |
| Draws | 9 |
| Losses | 54 |
| White | 68 |
| Black | 68 |
| White wins | 33 |
| Black wins | 40 |
| Score | 77.5 |
| Percent | 57 |
| Dp | 59.4 |
| AOR | 1305.9 |
| Performance | 1365.3 |
Rankings (Main)
| National | |
| Overall | 3133 |
| Gender | 2665 |
| Age group | 416 |
| Gender/Age | 331 |
| Provincial | |
| Overall | 1081 |
| Gender | 922 |
| Age group | 145 |
| Gender/Age | 113 |
| Regional | |
| Overall | 79 |
| Gender | 66 |
| Age group | 11 |
| Gender/Age | 9 |
Rankings (Standard)
| National | |
| Overall | 2745 |
| Gender | 2307 |
| Age group | 386 |
| Gender/Age | 305 |
| Provincial | |
| Overall | 987 |
| Gender | 838 |
| Age group | 137 |
| Gender/Age | 108 |
| Regional | |
| Overall | 74 |
| Gender | 61 |
| Age group | 9 |
| Gender/Age | 7 |
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 | 5 |
| Score | 2 |
| Percent | 40 |
| Aor | 1458.9 |
| Dp | -85 |
| Prat | 1373.9 |
Performance ()
| Games | 60 |
| Score | 37 |
| Percent | 61.7 |
| Aor | 1293.4 |
| Dp | 99.2 |
| Prat | 1392.6 |
Performance (12 months)
| Games | 65 |
| Score | 37 |
| Percent | 56.9 |
| Aor | 1311.7 |
| Dp | 58.8 |
| Prat | 1370.5 |
Performance (History)
| Games | 136 |
| Score | 77.5 |
| Percent | 57 |
| Aor | 1305.9 |
| Dp | 59.4 |
| Prat | 1365.3 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Mtsweni, T (Thapelo) | 4 | 2 | 2 | 2025 D2 Schools Individuals (U15 Open) | 2026 D2 Top 20 Schools Individuals (U15) | Details |
| Overall | 2 | Willemse, H (Hans) | 3 | 2 | 1 | West Rand Open 2.0 2025 (Rooks) | West Rand Womens Day Open 2026 (Rooks) | Details |
| Overall | 3 | Marx, EF (Ethen Frederik) | 3 | 2 | 1 | West Rand Women's Day Open 2025 (Rooks) | West Rand Open 2026 (Rooks) | Details |
| Overall | 4 | Mosesi, O (Omphile Sicelo) | 3 | 3 | 0 | West Rand Juniors 2026 (U16) | 2026 D2 Top 20 Schools Individuals (U15) | Details |
| Overall | 5 | Fourie, C (Caitlin) | 3 | 2 | 1 | West Rand Juniors 2025 (U16) | FIDE in the West 2026 (Rooks) | Details |
| Standard | 1 | Mtsweni, T (Thapelo) | 4 | 2 | 2 | 2025 D2 Schools Individuals (U15 Open) | 2026 D2 Top 20 Schools Individuals (U15) | Details |
| Standard | 2 | Marx, EF (Ethen Frederik) | 3 | 2 | 1 | West Rand Women's Day Open 2025 (Rooks) | West Rand Open 2026 (Rooks) | Details |
| Standard | 3 | Mosesi, O (Omphile Sicelo) | 3 | 3 | 0 | West Rand Juniors 2026 (U16) | 2026 D2 Top 20 Schools Individuals (U15) | Details |
| Standard | 4 | Fourie, C (Caitlin) | 3 | 2 | 1 | West Rand Juniors 2025 (U16) | FIDE in the West 2026 (Rooks) | Details |
| Standard | 5 | Willemse, H (Hans) | 3 | 2 | 1 | West Rand Open 2.0 2025 (Rooks) | West Rand Womens Day Open 2026 (Rooks) | Details |