PLAYER PAGE
Pieter Viljoen
1110138431Overberg (WOS)Personal
Main rating
| Rating | 1486.6 |
| K-factor | 32 |
| Floor | 999.9 |
| Highest | 1520.6 (2024-09-01) |
| Min/Max +/- allowed | 105 |
| Rating Change () | |
| Games | 6 |
| Score | 0.5 |
| We | 3.24 |
| SWe | -1.29 |
| Temp +/- | -41.4 |
| Penalties | 0 |
| Weight perform | 1314 |
| Final +/- | -41.4 |
| New Rating () | |
| Rating | 1445.3 |
| K-factor | 32 |
| Floor | 999.9 |
| Highest | 1520.6 (2024-09-01) |
| Min/Max +/- allowed | 105 |
Standard rating
| Rating | 1508.4 |
| K-factor | 32 |
| Floor | 997.8 |
| Highest | 1511 (2024-09-01) |
| Min/Max +/- allowed | 106.5 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1463.2 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1508.4 |
| K-factor | 32 |
| Floor | 997.8 |
| Highest | 1511 (2024-09-01) |
| Min/Max +/- allowed | 106.5 |
Rapid rating
| Rating | 1393.9 |
| K-factor | 32 |
| Floor | 934.2 |
| Highest | 1434.2 (2025-03-01) |
| Min/Max +/- allowed | 118.8 |
| Rating Change () | |
| Games | 6 |
| Score | 0.5 |
| We | 2.75 |
| SWe | -2.25 |
| Temp +/- | -72 |
| Penalties | 0 |
| Weight perform | 1254.4 |
| Final +/- | -72 |
| New Rating () | |
| Rating | 1321.9 |
| K-factor | 32 |
| Floor | 934.2 |
| Highest | 1434.2 (2025-03-01) |
| Min/Max +/- allowed | 118.8 |
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 | Hermanus Chess Club Open 2026 (Advanced) | Rapid | 2026-04-18 | 2026-04-18 | Overberg (WOS) | 7 | 1486.6 | 6 | 0.5 | 1110.2 | -41.4 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Overberg Schools High School Closed 2026 (U15 Boys) | Standard | 2026-03-07 | 2026-03-07 | Overberg (WOS) | 5 | 1470.5 | 5 | 4 | 1579.4 | 16.1 | Details |
| 2 | Overberg Schools High School Trials 2026 (U15 Boys) | Rapid | 2026-02-21 | 2026-02-21 | Overberg (WOS) | 6 | 1465.4 | 6 | 5 | 1499.8 | 3.2 | Details |
| 3 | Curro Hermanus Spring Open 2025 (High School) | Rapid | 2025-10-18 | 2025-10-18 | Overberg (WOS) | 6 | 1483.5 | 6 | 3 | 1360.3 | -11.3 | Details |
| 4 | Western Cape Schools - Top Schools 2025 (U15) | Standard | 2025-09-06 | 2025-09-07 | Overberg (WOS) | 6 | 1443.7 | 6 | 5 | 1655.3 | 24.9 | Details |
| 5 | Overberg Top Schools 2025 (U15-U19) | Standard | 2025-08-02 | 2025-08-02 | Overberg (WOS) | 5 | 1440.3 | 5 | 4 | 1452.5 | 2.2 | Details |
| 6 | Western Cape Schools Individual Championship 2025 (U15 Boys) | Standard | 2025-04-26 | 2025-04-27 | West Coast (WCU) | 6 | 1495 | 6 | 3 | 1444.8 | -5.8 | Details |
| 7 | Hermanus Chess Club Open 2025 (Intermediate) | Rapid | 2025-04-12 | 2025-04-12 | Overberg (WOS) | 7 | 1495 | 7 | 2 | 1171.5 | -28.4 | Details |
| 8 | Overberg Schools - HS Closed 2025 (U15 Boys) | Standard | 2025-03-22 | 2025-03-22 | Overberg (WOS) | 5 | 1499.9 | 4 | 3 | 1458.3 | -3 | Details |
| 9 | Overberg Schools - HS Trials 2025 (U15 Boys) | Rapid | 2025-02-22 | 2025-02-22 | Overberg (WOS) | 6 | 1475.5 | 6 | 5 | 1584.5 | 9.4 | Details |
| 10 | Overberg Schools & Federation Open 2025 (U15) | Rapid | 2025-02-01 | 2025-02-01 | Overberg (WOS) | 6 | 1475.5 | 6 | 5 | 1540.9 | 5.8 | Details |
| 11 | Mzansi Interprovincial Youth Chess Championships 2024 (U14 Open Championship) | Classical | 2024-12-16 | 2024-12-19 | Capricorn (LCP) | 7 | 1489.6 | 7 | 3.5 | 1439.9 | -9 | Details |
| 12 | Overberg GP Invitational Day 2 2024 (B) | Standard | 2024-09-27 | 2024-09-27 | Overberg (WOS) | 5 | 1401.9 | 5 | 4.5 | 1654.2 | 23.9 | Details |
| 13 | Overberg GP Invitational Day 1 2024 (B) | Standard | 2024-09-26 | 2024-09-26 | Overberg (WOS) | 5 | 1401.9 | 5 | 3 | 1384.1 | -1.2 | Details |
| 14 | Kleinmond Chess Club Open 2024 (U14) | Rapid | 2024-09-07 | 2024-09-07 | Overberg (WOS) | 6 | 1401.9 | 6 | 4.5 | 1556.5 | 12.1 | Details |
| 15 | Western Cape Top Schools Championship 2024 (U13 Mixed) | Standard | 2024-08-30 | 2024-09-01 | Eden (WEG) | 6 | 1401.9 | 6 | 3.5 | 1414.3 | 1.5 | Details |
| 16 | Overberg Schools - Top Schools 2024 (U13 Mixed) | Standard | 2024-07-27 | 2024-07-27 | Overberg (WOS) | 5 | 1354.4 | 5 | 5 | 1626.7 | 25.9 | Details |
| 17 | Western Cape PS Individuals Championship 2024 (U13 Boys) | Standard | 2024-05-04 | 2024-05-05 | West Coast (WCU) | 6 | 1320.3 | 6 | 3.5 | 1495.6 | 18.9 | Details |
| 18 | Hermanus Chess Club Open 2024 (Intermediate) | Rapid | 2024-04-20 | 2024-04-20 | Overberg (WOS) | 7 | 1327.4 | 7 | 4 | 1269.7 | -4 | Details |
| 19 | Western Cape Inter Region Cup 2024 (U14 Boys) | Standard | 2024-03-23 | 2024-03-24 | Overberg (WOS) | 5 | 1292.2 | 4 | 1 | 1252.3 | -3.8 | Details |
| 20 | Overberg Schools - PS Closed 2024 (U13 Boys) | Standard | 2024-03-16 | 2024-03-16 | Overberg (WOS) | 5 | 1292.2 | 5 | 3.5 | 1476.6 | 18.8 | Details |
| 21 | Overberg Schools - PS Trials Region 3 2024 (U13 Boys) | Rapid | 2024-03-02 | 2024-03-02 | Overberg (WOS) | 5 | 1292.2 | 5 | 3 | 1351.1 | 4.6 | Details |
| 22 | Overberg Top Schools 2023 (U13) | Standard | 2023-08-05 | 2023-08-05 | Overberg (WOS) | 5 | 1283.8 | 5 | 3 | 1336.8 | 4.5 | Details |
| 23 | Western Cape PS Individuals 2023 (U13 Boys) | Standard | 2023-05-05 | 2023-05-06 | Cape Town (WCT) | 6 | 1265.9 | 6 | 3 | 1340.1 | 10 | Details |
| 24 | Hermanus Rapid 2023 (C) | Rapid | 2023-04-22 | 2023-04-22 | Overberg (WOS) | 6 | 1265.3 | 6 | 3 | 1268.6 | 0.2 | Details |
| 25 | Overberg School Chess Closed Tournament 2023 (U13 Boys) | Standard | 2023-03-25 | 2023-03-25 | Overberg (WOS) | 5 | 1191.2 | 5 | 4 | 1475.8 | 27.1 | Details |
| 26 | Overberg Primary School Trials (Region 2) | Rapid | 2023-02-24 | 2023-03-10 | Overberg (WOS) | 6 | 1191.2 | 6 | 4 | 1403.1 | 14.1 | Details |
| 27 | Overberg Schools Open Tournament 2023 (U12) | Rapid | 2023-02-11 | 2023-02-11 | Overberg (WOS) | 5 | 1176.8 | 5 | 3 | 1313.1 | 7.9 | Details |
| 28 | The Hermanus Open 2022 (U12) | Blitz | 2022-05-14 | 2022-05-14 | Overberg (WOS) | 6 | 1216.6 | 6 | 3 | 1223 | 0.2 | Details |
| 29 | Western Cape Schools 2022 (U11 Boys) | Standard | 2022-05-28 | 2022-05-29 | Cape Winelands (WCW) | 6 | 1216.6 | 5 | 1 | 1001.4 | -22.3 | Details |
| 30 | Overberg Primary Schools Closed 2022 (U11 Boys) | Standard | 2022-03-12 | 2022-03-12 | Overberg (WOS) | 5 | 1200 | 5 | 3 | 1277.5 | 8.3 | Details |
Game statistics ( )
| Games | 6 |
| Wins | 0 |
| Draws | 1 |
| Losses | 5 |
| White | 4 |
| Black | 2 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0.5 |
| Percent | 8.3 |
| Dp | -354.2 |
| AOR | 1464.4 |
| Performance | 1110.2 |
Game statistics ()
| Games | 17 |
| Wins | 9 |
| Draws | 1 |
| Losses | 7 |
| White | 10 |
| Black | 7 |
| White wins | 6 |
| Black wins | 3 |
| Score | 9.5 |
| Percent | 55.9 |
| Dp | 50 |
| AOR | 1335.7 |
| Performance | 1385.7 |
Game statistics (History)
| Games | 173 |
| Wins | 102 |
| Draws | 7 |
| Losses | 64 |
| White | 88 |
| Black | 85 |
| White wins | 58 |
| Black wins | 44 |
| Score | 105.5 |
| Percent | 61 |
| Dp | 93.4 |
| AOR | 1305.7 |
| Performance | 1399.1 |
Rankings (Main)
| National | |
| Overall | 2027 |
| Gender | 1771 |
| Age group | 224 |
| Gender/Age | 181 |
| Provincial | |
| Overall | 615 |
| Gender | 517 |
| Age group | 69 |
| Gender/Age | 56 |
| Regional | |
| Overall | 30 |
| Gender | 24 |
| Age group | 6 |
| Gender/Age | 4 |
Rankings (Standard)
| National | |
| Overall | 1672 |
| Gender | 1467 |
| Age group | 186 |
| Gender/Age | 153 |
| Provincial | |
| Overall | 500 |
| Gender | 420 |
| Age group | 57 |
| Gender/Age | 47 |
| Regional | |
| Overall | 17 |
| Gender | 15 |
| Age group | 5 |
| Gender/Age | 3 |
Rankings (Rapid)
| National | |
| Overall | 861 |
| Gender | 753 |
| Age group | 162 |
| Gender/Age | 133 |
| Provincial | |
| Overall | 426 |
| Gender | 363 |
| Age group | 79 |
| Gender/Age | 64 |
| Regional | |
| Overall | 43 |
| Gender | 34 |
| Age group | 5 |
| Gender/Age | 3 |
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 | 6 |
| Score | 0.5 |
| Percent | 8.3 |
| Aor | 1464.4 |
| Dp | -354.2 |
| Prat | 1110.2 |
Performance ()
| Games | 17 |
| Score | 9.5 |
| Percent | 55.9 |
| Aor | 1335.7 |
| Dp | 50 |
| Prat | 1385.7 |
Performance (12 months)
| Games | 40 |
| Score | 24.5 |
| Percent | 61.2 |
| Aor | 1343.9 |
| Dp | 95.6 |
| Prat | 1439.6 |
Performance (History)
| Games | 173 |
| Score | 105.5 |
| Percent | 61 |
| Aor | 1305.7 |
| Dp | 93.4 |
| Prat | 1399.1 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Van Der Linde, L (Luandi) | 4 | 3 | 1 | Kleinmond Chess Club Open 2024 (U14) | Overberg Schools & Federation Open 2025 (U15) | Details |
| Overall | 2 | Foye, L (Logan) | 4 | 2 | 2 | Overberg Primary Schools Closed 2022 (U11 Boys) | Curro Hermanus Spring Open 2025 (High School) | Details |
| Overall | 3 | Scholtz, F (Francois) | 3 | 1 | 2 | Overberg Primary Schools Closed 2022 (U11 Boys) | Overberg School Chess Closed Tournament 2023 (U13 Boys) | Details |
| Overall | 4 | Smal, R (Riley) | 3 | 1 | 2 | Overberg Schools - HS Trials 2025 (U15 Boys) | Western Cape Schools Individual Championship 2025 (U15 Boys) | Details |
| Overall | 5 | Roux, C (Charl) | 3 | 0 | 3 | Western Cape PS Individuals Championship 2024 (U13 Boys) | Overberg Schools & Federation Open 2025 (U15) | Details |
| Standard | 1 | Foye, L (Logan) | 3 | 1 | 2 | Overberg Primary Schools Closed 2022 (U11 Boys) | Western Cape PS Individuals 2023 (U13 Boys) | Details |
| Standard | 2 | Prinsloo, L (Lyle) | 2 | 1 | 1 | Overberg Schools - PS Closed 2024 (U13 Boys) | Western Cape PS Individuals Championship 2024 (U13 Boys) | Details |
| Standard | 3 | Scholtz, F (Francois) | 2 | 1 | 1 | Overberg Primary Schools Closed 2022 (U11 Boys) | Overberg School Chess Closed Tournament 2023 (U13 Boys) | Details |
| Standard | 4 | Ngidi, N (Ndumiso) | 2 | 1 | 1 | Western Cape Inter Region Cup 2024 (U14 Boys) | Western Cape PS Individuals Championship 2024 (U13 Boys) | Details |
| Standard | 5 | Smal, R (Riley) | 2 | 1 | 1 | Overberg Schools - HS Closed 2025 (U15 Boys) | Western Cape Schools Individual Championship 2025 (U15 Boys) | Details |
| Rapid | 1 | Du Plessis, J (Jan-Dawid) | 3 | 1 | 2 | Overberg Primary School Trials (Region 2) | Overberg Schools High School Trials 2026 (U15 Boys) | Details |
| Rapid | 2 | Ntontelo, K (Khazimla) | 2 | 1 | 1 | The Hermanus Open 2022 (U12) | Kleinmond Chess Club Open 2024 (U14) | Details |
| Rapid | 3 | Roux, C (Charl) | 2 | 0 | 2 | Kleinmond Chess Club Open 2024 (U14) | Overberg Schools & Federation Open 2025 (U15) | Details |
| Rapid | 4 | Van Zyl, E (Ethan) | 2 | 0 | 2 | Hermanus Rapid 2023 (C) | Hermanus Chess Club Open 2025 (Intermediate) | Details |
| Rapid | 5 | Van Der Linde, L (Luandi) | 2 | 1 | 1 | Kleinmond Chess Club Open 2024 (U14) | Overberg Schools & Federation Open 2025 (U15) | Details |