PLAYER PAGE
Johandre Viljoen
1110158449West Rand (GWR)Personal
Main rating
| Rating | 1401.4 |
| K-factor | 32 |
| Floor | 931.2 |
| Highest | 1431.2 (2026-06-01) |
| Min/Max +/- allowed | 119 |
| Rating Change () | |
| Games | 5 |
| Score | 3.5 |
| We | 2.69 |
| SWe | 0.67 |
| Temp +/- | 21.6 |
| Penalties | 0 |
| Weight perform | 1406.2 |
| Final +/- | +21.6 |
| New Rating () | |
| Rating | 1423 |
| K-factor | 32 |
| Floor | 931.2 |
| Highest | 1431.2 (2026-06-01) |
| Min/Max +/- allowed | 119.3 |
Standard rating
| Rating | 1399.1 |
| K-factor | 32 |
| Floor | 931.2 |
| Highest | 1431.2 (2026-06-01) |
| Min/Max +/- allowed | 119.3 |
| Rating Change () | |
| Games | 5 |
| Score | 3.5 |
| We | 2.72 |
| SWe | 0.78 |
| Temp +/- | 25 |
| Penalties | 0 |
| Weight perform | 1406.2 |
| Final +/- | +25 |
| New Rating () | |
| Rating | 1424.1 |
| 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 | 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 |
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 | 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 |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | 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 |
| 2 | 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 |
| 3 | 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 |
| 4 | 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 |
| 5 | 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 |
| 6 | 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 |
| 7 | 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 |
| 8 | 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 |
| 9 | 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 |
| 10 | 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 |
| 11 | 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 |
| 12 | 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 |
| 13 | 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 |
| 14 | 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 |
| 15 | 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 |
| 16 | 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 |
| 17 | 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 |
| 18 | 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 |
| 19 | 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 |
| 20 | 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 |
| 21 | 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 |
| 22 | 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 |
| 23 | 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 |
| 24 | 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 | 3 |
| Draws | 1 |
| Losses | 1 |
| White | 2 |
| Black | 3 |
| White wins | 2 |
| Black wins | 1 |
| Score | 3.5 |
| Percent | 70 |
| Dp | 170 |
| AOR | 1361.8 |
| Performance | 1531.8 |
Game statistics ()
| Games | 50 |
| Wins | 30 |
| Draws | 4 |
| Losses | 16 |
| White | 25 |
| Black | 25 |
| White wins | 14 |
| Black wins | 16 |
| Score | 32 |
| Percent | 64 |
| Dp | 119 |
| AOR | 1297.9 |
| Performance | 1416.9 |
Game statistics (History)
| Games | 126 |
| Wins | 68 |
| Draws | 9 |
| Losses | 49 |
| White | 62 |
| Black | 64 |
| White wins | 31 |
| Black wins | 37 |
| Score | 72.5 |
| Percent | 57.5 |
| Dp | 64.1 |
| AOR | 1308.7 |
| Performance | 1372.8 |
Rankings (Main)
| National | |
| Overall | 3579 |
| Gender | 3028 |
| Age group | 489 |
| Gender/Age | 398 |
| Provincial | |
| Overall | 1238 |
| Gender | 1046 |
| Age group | 172 |
| Gender/Age | 135 |
| Regional | |
| Overall | 92 |
| Gender | 78 |
| Age group | 14 |
| Gender/Age | 11 |
Rankings (Standard)
| National | |
| Overall | 3225 |
| Gender | 2695 |
| Age group | 463 |
| Gender/Age | 373 |
| Provincial | |
| Overall | 1159 |
| Gender | 983 |
| Age group | 166 |
| Gender/Age | 133 |
| Regional | |
| Overall | 94 |
| Gender | 79 |
| Age group | 15 |
| Gender/Age | 12 |
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 | 3.5 |
| Percent | 70 |
| Aor | 1361.8 |
| Dp | 170 |
| Prat | 1531.8 |
Performance ()
| Games | 50 |
| Score | 32 |
| Percent | 64 |
| Aor | 1297.9 |
| Dp | 119 |
| Prat | 1416.9 |
Performance (12 months)
| Games | 71 |
| Score | 38.5 |
| Percent | 54.2 |
| Aor | 1320.6 |
| Dp | 35.9 |
| Prat | 1356.6 |
Performance (History)
| Games | 126 |
| Score | 72.5 |
| Percent | 57.5 |
| Aor | 1308.7 |
| Dp | 64.1 |
| Prat | 1372.8 |
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 | Willemse, H (Hans) | 3 | 2 | 1 | West Rand Open 2.0 2025 (Rooks) | West Rand Womens Day Open 2026 (Rooks) | Details |
| Standard | 3 | Marx, EF (Ethen Frederik) | 3 | 2 | 1 | West Rand Women's Day Open 2025 (Rooks) | West Rand Open 2026 (Rooks) | Details |
| Standard | 4 | Mosesi, O (Omphile Sicelo) | 3 | 3 | 0 | West Rand Juniors 2026 (U16) | 2026 D2 Top 20 Schools Individuals (U15) | Details |
| Standard | 5 | Fourie, C (Caitlin) | 3 | 2 | 1 | West Rand Juniors 2025 (U16) | FIDE in the West 2026 (Rooks) | Details |