PLAYER PAGE
Justin Oberholzer
1160151390West Coast (WCU)Personal
Main rating
| Rating | 1473.4 |
| K-factor | 32 |
| Floor | 1085.6 |
| Highest | 1585.6 (2026-01-01) |
| Min/Max +/- allowed | 96 |
| Rating Change () | |
| Games | 16 |
| Score | 7.5 |
| We | 9.47 |
| SWe | -0.29 |
| Temp +/- | -9.2 |
| Penalties | 0 |
| Weight perform | 1321.6 |
| Final +/- | -9.2 |
| New Rating () | |
| Rating | 1464.1 |
| K-factor | 32 |
| Floor | 1085.6 |
| Highest | 1585.6 (2026-01-01) |
| Min/Max +/- allowed | 95.7 |
Standard rating
| Rating | 1523.3 |
| K-factor | 32 |
| Floor | 1096.4 |
| Highest | 1596.4 (2026-03-01) |
| Min/Max +/- allowed | 94.3 |
| Rating Change () | |
| Games | 7 |
| Score | 4 |
| We | 4.38 |
| SWe | -0.38 |
| Temp +/- | -12.2 |
| Penalties | 0 |
| Weight perform | 1469.2 |
| Final +/- | -12.2 |
| New Rating () | |
| Rating | 1511.1 |
| K-factor | 32 |
| Floor | 1096.4 |
| Highest | 1596.4 (2026-03-01) |
| Min/Max +/- allowed | 94.3 |
Rapid rating
| Rating | 1406.7 |
| K-factor | 32 |
| Floor | 998.5 |
| Highest | 1498.5 (2026-01-01) |
| Min/Max +/- allowed | 108.4 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1332.7 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1406.7 |
| K-factor | 32 |
| Floor | 998.5 |
| Highest | 1498.5 (2026-01-01) |
| Min/Max +/- allowed | 108.4 |
Blitz rating
| Rating | 1162.5 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2018-10-01) |
| Min/Max +/- allowed | 165.8 |
| Rating Change () | |
| Games | 9 |
| Score | 3.5 |
| We | 4.03 |
| SWe | -0.99 |
| Temp +/- | -35.6 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | -35.6 |
| New Rating () | |
| Rating | 1127 |
| 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 | South African Open Championship 2026 (U11 Boys) | Classical | 2026-07-02 | 2026-07-05 | Cape Town (WCT) | 7 | 1473.4 | 7 | 4 | 1483.4 | 4.1 | Details |
| 2 | South African Open Championship 2026 (Blitz) | Blitz | 2026-06-27 | 2026-06-27 | Cape Town (WCT) | 9 | 1473.4 | 9 | 3.5 | 1278.2 | -12.1 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Swartland Chess Open 2026 (U11) | Rapid | 2026-06-20 | 2026-06-20 | West Coast (WCU) | 5 | 1488.8 | 5 | 3.5 | 1404.4 | -1.8 | Details |
| 2 | Lower West Coast Top Schools 2026 (U11) | Rapid | 2026-05-30 | 2026-05-30 | West Coast (WCU) | 5 | 1488.8 | 4 | 2 | 1337.3 | -13.6 | Details |
| 3 | 2026 WCSC PS Individual Championship (U11 Boys) | Standard | 2026-05-16 | 2026-05-17 | Overberg (WOS) | 6 | 1562.4 | 6 | 3 | 1454.4 | -20 | Details |
| 4 | UWC Chess Club Open Rapid 2026 (Junior) | Rapid | 2026-05-02 | 2026-05-02 | Cape Town (WCT) | 6 | 1562.4 | 6 | 3 | 1207.8 | -43.1 | Details |
| 5 | Moja Chess Extravaganza 2026 (U10) | Standard | 2026-04-25 | 2026-04-26 | Cape Town (WCT) | 5 | 1562.4 | 5 | 3 | 1487.1 | -10.5 | Details |
| 6 | South African Junior Closed Chess Championship 2026 (U10 Open) | Classical | 2026-03-28 | 2026-04-02 | Bojanala Platina (NBR) | 9 | 1585.3 | 9 | 4.5 | 1544.6 | -12.3 | Details |
| 7 | South African Junior Closed Chess Championship 2026 (Blitz) | Blitz | 2026-03-31 | 2026-03-31 | Bojanala Platina (NBR) | 9 | 1585.3 | 4 | 1 | 1192.5 | -10.6 | Details |
| 8 | West Coast Schools Prestige Individuals Championships 2026 (u11 bOYS) | Standard | 2026-02-28 | 2026-03-07 | West Coast (WCU) | 6 | 1561.2 | 6 | 5.5 | 1687.5 | 24.1 | Details |
| 9 | Lower West Coast Schools Prestige Individuals Championship 2026 (U11 Open) | Rapid | 2026-02-14 | 2026-02-14 | West Coast (WCU) | 5 | 1584.9 | 5 | 4 | 1517.9 | -5 | Details |
| 10 | West Coast League 2026 (B) | Rapid | 2026-02-07 | 2026-02-07 | West Coast (WCU) | 5 | 1584.9 | 4 | 2 | 1402.3 | -10.2 | Details |
| 11 | 2025 Mzansi Individual Championships (U10 Open) | Classical | 2025-12-17 | 2025-12-20 | Nelson Mandela Bay (ENM) | 6 | 1545.3 | 6 | 4.5 | 1675.1 | 18.4 | Details |
| 12 | 2025 Mzansi Inter Provincial Team Championships (U10 Combined) | Standard | 2025-12-15 | 2025-12-17 | Nelson Mandela Bay (ENM) | 6 | 1545.3 | 6 | 3.5 | 1533.4 | -1.3 | Details |
| 13 | WCSC Kings & Queens 2025 (Kings) | Rapid | 2025-11-29 | 2025-11-29 | Cape Winelands (WCW) | 6 | 1545.3 | 4 | 3 | 1673 | 7.7 | Details |
| 14 | West Coast Schools Chess Grand Challenge League 2025 (PS Super) | Rapid | 2025-11-08 | 2025-11-08 | West Coast (WCU) | 5 | 1540.7 | 5 | 4 | 1571.3 | 2.9 | Details |
| 15 | Western Cape Schools - Top Schools 2025 (U9) | Standard | 2025-09-06 | 2025-09-07 | Overberg (WOS) | 6 | 1543.1 | 5 | 5 | 1790.2 | 25.1 | Details |
| 16 | Rooibos Open 2025 (Intermediate) | Standard | 2025-08-30 | 2025-08-30 | West Coast (WCU) | 5 | 1543.1 | 5 | 3 | 1275.3 | -26.4 | Details |
| 17 | Pedro Booyse Top Schools 2025 (U9) | Rapid | 2025-08-23 | 2025-08-23 | West Coast (WCU) | 6 | 1553.3 | 6 | 6 | 1688.9 | 12.2 | Details |
| 18 | Western Cape Women’s Championship 2025 (U10) | Standard | 2025-08-09 | 2025-08-09 | West Coast (WCU) | 5 | 1553.3 | 5 | 3 | 1471 | -8.6 | Details |
| 19 | Western Cape Women’s Championship 2025 (Sunday Rapid) | Rapid | 2025-08-10 | 2025-08-10 | West Coast (WCU) | 5 | 1553.3 | 5 | 3 | 1375.3 | -10.1 | Details |
| 20 | Lower West Coast Top Schools 2025 (U9) | Rapid | 2025-06-12 | 2025-06-12 | West Coast (WCU) | 6 | 1578.6 | 4 | 4 | 1596.5 | 1.7 | Details |
| 21 | 4th Curro Durbanville Rapid Open 2025 (Advanced) | Rapid | 2025-07-19 | 2025-07-19 | Cape Town (WCT) | 7 | 1578.6 | 7 | 2 | 1357.5 | -17.6 | Details |
| 22 | Western Cape Schools Individual Championship 2025 (U9 Boys) | Standard | 2025-05-17 | 2025-05-18 | Cape Winelands (WCW) | 6 | 1462.9 | 6 | 5 | 1708.2 | 28.7 | Details |
| 23 | West Coast And Mykonos Open 2025 (U10) | Standard | 2025-05-02 | 2025-05-04 | West Coast (WCU) | 5 | 1462.9 | 5 | 4 | 1551.6 | 9.2 | Details |
| 24 | West Coast Schools Chess Prestige 2025 (U9 Boys) | Standard | 2025-03-08 | 2025-03-08 | West Coast (WCU) | 6 | 1370.8 | 6 | 6 | 1652.4 | 31.7 | Details |
| 25 | Lower West Coast Prestige 2025 (U9 Boys) | Rapid | 2025-02-22 | 2025-02-22 | West Coast (WCU) | 5 | 1301.6 | 5 | 5 | 1593.8 | 20.4 | Details |
| 26 | West Coast Grand Challange League 2024 (PS Champions) | Rapid | 2024-10-26 | 2024-10-26 | West Coast (WCU) | 5 | 1280.2 | 5 | 4 | 1472.4 | 11.9 | Details |
| 27 | Western Cape Top Schools Championship 2024 (U11 Mixed) | Standard | 2024-08-30 | 2024-09-01 | Eden (WEG) | 6 | 1241.7 | 6 | 4 | 1425.1 | 21.4 | Details |
| 28 | Western Cape Women’s Championship 2024 (U10) | Standard | 2024-08-09 | 2024-08-09 | West Coast (WCU) | 5 | 1181.5 | 5 | 2 | 1260.3 | 6.8 | Details |
| 29 | Pedro Booyse Top Schools Championships 2024 (U7+U9) | Rapid | 2024-07-20 | 2024-07-20 | West Coast (WCU) | 7 | 1181.5 | 6 | 5 | 1483.4 | 26.8 | Details |
| 30 | West Coast & Mykonos Open 2024 (U10) | Standard | 2024-05-18 | 2024-05-18 | West Coast (WCU) | 5 | 1123.5 | 4 | 1 | 1019 | -8.3 | Details |
| 31 | Lower West Top Schools 2024 (U9+U11) | Rapid | 2024-05-11 | 2024-05-11 | West Coast (WCU) | 5 | 1123.5 | 5 | 3 | 1333.9 | 14.4 | Details |
| 32 | Western Cape PS Individuals Championship 2024 (U9 Boys) | Standard | 2024-05-04 | 2024-05-05 | West Coast (WCU) | 6 | 1123.5 | 6 | 3.5 | 1351.6 | 26.2 | Details |
| 33 | West Coast Schools Chess Prestige Championships 2024 (U9 Boys) | Rapid | 2024-03-09 | 2024-03-09 | West Coast (WCU) | 5 | 1098.2 | 5 | 3 | 1289 | 14.1 | Details |
| 34 | Lower West Coast Schools Chess Prestige 2024 (U9 Boys) | Rapid | 2024-02-17 | 2024-02-17 | West Coast (WCU) | 5 | 1058.9 | 5 | 3.5 | 1360.8 | 21.9 | Details |
| 35 | West Coast Primary Schools Grand Challenge League 2023 (Primary School) | Rapid | 2023-10-21 | 2023-10-21 | West Coast (WCU) | 5 | 1081.4 | 5 | 0 | 819.6 | -12.3 | Details |
| 36 | Western Cape Top Schools 2023 (U7 Mixed) | Standard | 2023-09-02 | 2023-09-03 | Cape Winelands (WCW) | 5 | 1169.5 | 5 | 0 | 636.3 | -49 | Details |
| 37 | Pedro Booyse Top Schools 2023 (U7+U9) | Rapid | 2023-07-29 | 2023-07-29 | West Coast (WCU) | 5 | 1221.2 | 5 | 0 | 759.1 | -29 | Details |
| 38 | Western Cape PS Individuals 2023 (U7 Boys) | Standard | 2023-05-05 | 2023-05-06 | Cape Town (WCT) | 6 | 1237 | 6 | 2.5 | 1161.4 | -8.8 | Details |
| 39 | Lower West Coast Primary Schools Prestige Championships 2023 (U7 Boys+Girls) | Rapid | 2023-03-04 | 2023-03-04 | West Coast (WCU) | 5 | 1200 | 5 | 4 | 1455 | 18.6 | Details |
Game statistics ( )
| Games | 7 |
| Wins | 3 |
| Draws | 2 |
| Losses | 2 |
| White | 3 |
| Black | 4 |
| White wins | 2 |
| Black wins | 1 |
| Score | 4 |
| Percent | 57.1 |
| Dp | 60.7 |
| AOR | 1422.7 |
| Performance | 1483.4 |
Game statistics ()
| Games | 70 |
| Wins | 35 |
| Draws | 8 |
| Losses | 27 |
| White | 34 |
| Black | 36 |
| White wins | 21 |
| Black wins | 14 |
| Score | 39 |
| Percent | 55.7 |
| Dp | 48.6 |
| AOR | 1375.2 |
| Performance | 1423.7 |
Game statistics (History)
| Games | 223 |
| Wins | 129 |
| Draws | 13 |
| Losses | 81 |
| White | 113 |
| Black | 110 |
| White wins | 66 |
| Black wins | 63 |
| Score | 135.5 |
| Percent | 60.8 |
| Dp | 91.5 |
| AOR | 1314.2 |
| Performance | 1405.7 |
Rankings (Main)
| National | |
| Overall | 2348 |
| Gender | 2037 |
| Age group | 178 |
| Gender/Age | 146 |
| Provincial | |
| Overall | 722 |
| Gender | 603 |
| Age group | 56 |
| Gender/Age | 41 |
| Regional | |
| Overall | 43 |
| Gender | 36 |
| Age group | 4 |
| Gender/Age | 3 |
Rankings (Standard)
| National | |
| Overall | 1572 |
| Gender | 1390 |
| Age group | 123 |
| Gender/Age | 102 |
| Provincial | |
| Overall | 455 |
| Gender | 389 |
| Age group | 40 |
| Gender/Age | 31 |
| Regional | |
| Overall | 20 |
| Gender | 17 |
| Age group | 2 |
| Gender/Age | 1 |
Rankings (Rapid)
| National | |
| Overall | 870 |
| Gender | 762 |
| Age group | 103 |
| Gender/Age | 81 |
| Provincial | |
| Overall | 403 |
| Gender | 346 |
| Age group | 55 |
| Gender/Age | 38 |
| Regional | |
| Overall | 71 |
| Gender | 53 |
| Age group | 15 |
| Gender/Age | 6 |
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 | 7 |
| Score | 4 |
| Percent | 57.1 |
| Aor | 1422.7 |
| Dp | 60.7 |
| Prat | 1483.4 |
Performance ()
| Games | 70 |
| Score | 39 |
| Percent | 55.7 |
| Aor | 1375.2 |
| Dp | 48.6 |
| Prat | 1423.7 |
Performance (12 months)
| Games | 117 |
| Score | 74 |
| Percent | 63.2 |
| Aor | 1367.3 |
| Dp | 112.6 |
| Prat | 1479.9 |
Performance (History)
| Games | 223 |
| Score | 135.5 |
| Percent | 60.8 |
| Aor | 1314.2 |
| Dp | 91.5 |
| Prat | 1405.7 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Erasmus, M (Migal) | 6 | 3 | 3 | Lower West Coast Prestige 2025 (U9 Boys) | West Coast Schools Chess Grand Challenge League 2025 (PS Super) | Details |
| Overall | 2 | Heynse, D (Deraygon) | 4 | 2 | 2 | Lower West Coast Top Schools 2025 (U9) | Pedro Booyse Top Schools 2025 (U9) | Details |
| Overall | 3 | Revmatas, N (Nikolai) | 4 | 3 | 1 | Lower West Coast Primary Schools Prestige Championships 2023 (U7 Boys+Girls) | West Coast Schools Chess Grand Challenge League 2025 (PS Super) | Details |
| Overall | 4 | Erasmus, D (Daniel) | 4 | 1 | 3 | Lower West Coast Schools Chess Prestige 2024 (U9 Boys) | Lower West Coast Top Schools 2026 (U11) | Details |
| Overall | 5 | Du Toit, R (Ruvay) | 3 | 3 | 0 | Lower West Coast Schools Prestige Individuals Championship 2026 (U11 Open) | 2026 WCSC PS Individual Championship (U11 Boys) | Details |
| Standard | 1 | Rehse, N (Nathan) | 3 | 1 | 2 | Western Cape Women’s Championship 2025 (U10) | Moja Chess Extravaganza 2026 (U10) | Details |
| Standard | 2 | Ramonyaluoe, M (Madalitso) | 3 | 1 | 2 | West Coast And Mykonos Open 2025 (U10) | Moja Chess Extravaganza 2026 (U10) | Details |
| Standard | 3 | Rogova, E (Emilia) | 2 | 2 | 0 | West Coast & Mykonos Open 2024 (U10) | Western Cape Women’s Championship 2024 (U10) | Details |
| Standard | 4 | Kruger, J (Josua Baruch) | 2 | 2 | 0 | Western Cape Schools Individual Championship 2025 (U9 Boys) | South African Junior Closed Chess Championship 2026 (U10 Open) | Details |
| Standard | 5 | Gagiano, A (Anwar) | 2 | 0 | 2 | West Coast Schools Chess Prestige 2025 (U9 Boys) | West Coast Schools Prestige Individuals Championships 2026 (u11 bOYS) | Details |
| Rapid | 1 | Heynse, D (Deraygon) | 4 | 2 | 2 | Lower West Coast Top Schools 2025 (U9) | Pedro Booyse Top Schools 2025 (U9) | Details |
| Rapid | 2 | Revmatas, N (Nikolai) | 4 | 3 | 1 | Lower West Coast Primary Schools Prestige Championships 2023 (U7 Boys+Girls) | West Coast Schools Chess Grand Challenge League 2025 (PS Super) | Details |
| Rapid | 3 | Erasmus, M (Migal) | 4 | 1 | 3 | Lower West Coast Prestige 2025 (U9 Boys) | West Coast Schools Chess Grand Challenge League 2025 (PS Super) | Details |
| Rapid | 4 | Erasmus, D (Daniel) | 3 | 1 | 2 | Lower West Coast Schools Chess Prestige 2024 (U9 Boys) | Lower West Coast Top Schools 2026 (U11) | Details |
| Rapid | 5 | Swartz, R (Rowan) | 2 | 1 | 1 | Pedro Booyse Top Schools 2023 (U7+U9) | West Coast Primary Schools Grand Challenge League 2023 (Primary School) | Details |