PLAYER PAGE
Johandre Viljoen
1110158449West Rand (GWR)Personal
Main rating
| Rating | 1319.1 |
| K-factor | 32 |
| Floor | 912.9 |
| Highest | 1412.9 (2025-09-01) |
| Min/Max +/- allowed | 122 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1244.1 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1319.1 |
| K-factor | 32 |
| Floor | 912.9 |
| Highest | 1412.9 (2025-09-01) |
| Min/Max +/- allowed | 122.4 |
Standard rating
| Rating | 1321.6 |
| K-factor | 32 |
| Floor | 915.1 |
| Highest | 1415.1 (2025-09-01) |
| Min/Max +/- allowed | 122 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1244.1 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1321.6 |
| K-factor | 32 |
| Floor | 915.1 |
| Highest | 1415.1 (2025-09-01) |
| Min/Max +/- allowed | 122 |
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 |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | West Rand Open 2026 (Rooks) | Standard | 2026-02-07 | 2026-02-07 | West Rand (GWR) | 5 | 1321.3 | 5 | 3 | 1367.2 | 0 | Details |
| 2 | Gauteng Inter-Region at Emerald Resort 2025 (U16 Championship) | Standard | 2025-12-06 | 2025-12-07 | Sedibeng (GSV) | 5 | 1326 | 5 | 0 | 1105.5 | 0 | Details |
| 3 | West Rand Closed 2025 (U16) | Standard | 2025-10-18 | 2025-10-18 | West Rand (GWR) | 5 | 1402.3 | 5 | 3.5 | 1560.2 | 0 | Details |
| 4 | 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 | 0 | Details |
| 5 | 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 | 0 | Details |
| 6 | West Rand Trials 2025 (U16) | Standard | 2025-09-06 | 2025-09-06 | West Rand (GWR) | 5 | 1412.9 | 5 | 2.5 | 1337.5 | 0 | Details |
| 7 | 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 | 0 | Details |
| 8 | 2025 D2 Schools League Finals (U15) | Standard | 2025-07-26 | 2025-07-26 | West Rand (GWR) | 5 | 1401.9 | 5 | 3 | 1342.5 | 0 | Details |
| 9 | West Rand Open 2.0 2025 (Rooks) | Standard | 2025-06-07 | 2025-06-07 | West Rand (GWR) | 5 | 1411.6 | 5 | 3 | 1341 | 0 | Details |
| 10 | 2025 D2 Schools Individuals (U15 Open) | Standard | 2025-05-10 | 2025-05-10 | West Rand (GWR) | 5 | 1362.4 | 5 | 4 | 1497.3 | 0 | Details |
| 11 | FIDE in The West 2025 (Rooks) | Standard | 2025-04-12 | 2025-04-12 | West Rand (GWR) | 5 | 1300.8 | 5 | 3 | 1474.1 | 0 | Details |
| 12 | West Rand Juniors 2025 (U16) | Standard | 2025-03-08 | 2025-03-08 | West Rand (GWR) | 5 | 1280.8 | 5 | 3 | 1412.8 | 0 | Details |
| 13 | 2025 West Rand Open (Rooks) | Standard | 2025-02-08 | 2025-02-08 | West Rand (GWR) | 5 | 1276.2 | 5 | 2 | 1310.6 | 0 | Details |
| 14 | D2 School League Finals 2024 (U13) | Standard | 2024-07-20 | 2024-07-20 | West Rand (GWR) | 5 | 1232.9 | 5 | 4 | 1472.1 | 0 | Details |
| 15 | 2024 D2 Schools Individuals (U13 Boys) | Standard | 2024-05-04 | 2024-05-04 | West Rand (GWR) | 5 | 1222.1 | 5 | 3 | 1276.2 | 0 | Details |
| 16 | D2 School League Finals 2023 (U13) | Standard | 2023-07-22 | 2023-07-22 | West Rand (GWR) | 5 | 1200 | 5 | 3 | 1333.7 | 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 | 5 |
| Wins | 3 |
| Draws | 0 |
| Losses | 2 |
| White | 3 |
| Black | 2 |
| White wins | 2 |
| Black wins | 1 |
| Score | 3 |
| Percent | 60 |
| Dp | 85 |
| AOR | 1282.2 |
| Performance | 1367.2 |
Game statistics (History)
| Games | 81 |
| Wins | 41 |
| Draws | 5 |
| Losses | 35 |
| White | 40 |
| Black | 41 |
| White wins | 19 |
| Black wins | 22 |
| Score | 43.5 |
| Percent | 53.7 |
| Dp | 31.5 |
| AOR | 1313.7 |
| Performance | 1345.2 |
Rankings (Main)
| National | |
| Overall | 5357 |
| Gender | 4455 |
| Age group | 870 |
| Gender/Age | 675 |
| Provincial | |
| Overall | 1811 |
| Gender | 1509 |
| Age group | 301 |
| Gender/Age | 232 |
| Regional | |
| Overall | 142 |
| Gender | 113 |
| Age group | 23 |
| Gender/Age | 20 |
Rankings (Standard)
| National | |
| Overall | 4723 |
| Gender | 3921 |
| Age group | 762 |
| Gender/Age | 593 |
| Provincial | |
| Overall | 1686 |
| Gender | 1405 |
| Age group | 286 |
| Gender/Age | 222 |
| Regional | |
| Overall | 137 |
| Gender | 110 |
| Age group | 21 |
| Gender/Age | 18 |
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 | 5 |
| Score | 3 |
| Percent | 60 |
| Aor | 1282.2 |
| Dp | 85 |
| Prat | 1367.2 |
Performance (12 months)
| Games | 61 |
| Score | 31.5 |
| Percent | 51.6 |
| Aor | 1330.3 |
| Dp | 13.9 |
| Prat | 1344.3 |
Performance (History)
| Games | 81 |
| Score | 43.5 |
| Percent | 53.7 |
| Aor | 1313.7 |
| Dp | 31.5 |
| Prat | 1345.2 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Marx, EF (Ethen Frederik) | 3 | 2 | 1 | West Rand Women's Day Open 2025 (Rooks) | West Rand Open 2026 (Rooks) | Details |
| Overall | 2 | Mtsweni, T (Thapelo) | 3 | 2 | 1 | 2025 D2 Schools Individuals (U15 Open) | West Rand Closed 2025 (U16) | Details |
| Overall | 3 | Lekgoba, R (Rethabile Ellen) | 2 | 0 | 2 | FIDE in The West 2025 (Rooks) | West Rand Women's Day Open 2025 (Rooks) | Details |
| Overall | 4 | Maritz, W (Waldo Hermann) | 2 | 1 | 1 | West Rand Juniors 2025 (U16) | West Rand Closed 2025 (U16) | Details |
| Overall | 5 | Fourie, C (Caitlin) | 2 | 1 | 1 | West Rand Juniors 2025 (U16) | West Rand Open 2026 (Rooks) | Details |
| Standard | 1 | Marx, EF (Ethen Frederik) | 3 | 2 | 1 | West Rand Women's Day Open 2025 (Rooks) | West Rand Open 2026 (Rooks) | Details |
| Standard | 2 | Mtsweni, T (Thapelo) | 3 | 2 | 1 | 2025 D2 Schools Individuals (U15 Open) | West Rand Closed 2025 (U16) | Details |
| Standard | 3 | Lekgoba, R (Rethabile Ellen) | 2 | 0 | 2 | FIDE in The West 2025 (Rooks) | West Rand Women's Day Open 2025 (Rooks) | Details |
| Standard | 4 | Maritz, W (Waldo Hermann) | 2 | 1 | 1 | West Rand Juniors 2025 (U16) | West Rand Closed 2025 (U16) | Details |
| Standard | 5 | Fourie, C (Caitlin) | 2 | 1 | 1 | West Rand Juniors 2025 (U16) | West Rand Open 2026 (Rooks) | Details |