PLAYER PAGE
Mika Van Der Westhuizen
2120138448Overberg (WOS)Personal
Main rating
| Rating | 1502.3 |
| K-factor | 32 |
| Floor | 1041.2 |
| Highest | 1541.2 (2025-11-30) |
| Min/Max +/- allowed | 102 |
| Rating Change () | |
| Games | 16 |
| Score | 7 |
| We | 8.33 |
| SWe | -0.12 |
| Temp +/- | -3.9 |
| Penalties | 0 |
| Weight perform | 1372.4 |
| Final +/- | -3.9 |
| New Rating () | |
| Rating | 1498.3 |
| K-factor | 32 |
| Floor | 1041.2 |
| Highest | 1541.2 (2025-11-30) |
| Min/Max +/- allowed | 102 |
Standard rating
| Rating | 1522.9 |
| K-factor | 32 |
| Floor | 1063.3 |
| Highest | 1588.3 (2025-09-01) |
| Min/Max +/- allowed | 95.4 |
| Rating Change () | |
| Games | 9 |
| Score | 5.5 |
| We | 4.72 |
| SWe | 0.78 |
| Temp +/- | 25 |
| Penalties | 0 |
| Weight perform | 1482.1 |
| Final +/- | +25 |
| New Rating () | |
| Rating | 1547.9 |
| K-factor | 32 |
| Floor | 1063.3 |
| Highest | 1588.3 (2025-09-01) |
| Min/Max +/- allowed | 95.4 |
Rapid rating
| Rating | 1366.8 |
| K-factor | 36 |
| Floor | 866.8 |
| Highest | 1539.9 (2022-06-01) |
| Min/Max +/- allowed | 102.2 |
| Rating Change () | |
| Games | 7 |
| Score | 1.5 |
| We | 2.81 |
| SWe | -1.31 |
| Temp +/- | -47.2 |
| Penalties | 0 |
| Weight perform | 1325.4 |
| Final +/- | -47.2 |
| New Rating () | |
| Rating | 1319.5 |
| K-factor | 36 |
| Floor | 866.8 |
| Highest | 1539.9 (2022-06-01) |
| Min/Max +/- allowed | 102.2 |
Blitz rating
| Rating | 1292.2 |
| K-factor | 36 |
| Floor | 792.2 |
| Highest | 1292.2 (2025-11-30) |
| Min/Max +/- allowed | 145.4 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1292.2 |
| K-factor | 36 |
| Floor | 792.2 |
| Highest | 1292.2 (2025-11-30) |
| Min/Max +/- allowed | 145.4 |
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 | 1502.3 | 7 | 1.5 | 1228.7 | -34.6 | Details |
| 2 | South African Junior Closed Chess Championship 2026 (U14 Girls) | Classical | 2026-03-28 | 2026-04-02 | Bojanala Platina (NBR) | 9 | 1502.3 | 9 | 5.5 | 1596.7 | 30.7 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Steinitz Chess Festival 2026 (Advanced) | Standard | 2026-03-20 | 2026-03-22 | Cape Town (WCT) | 6 | 1530.7 | 5 | 1.5 | 1171.3 | -61.9 | Details |
| 2 | Overberg Schools High School Closed 2026 (U15 Girls) | Standard | 2026-03-07 | 2026-03-07 | Overberg (WOS) | 5 | 1530.7 | 5 | 4.5 | 1736.3 | 33.5 | Details |
| 3 | Overberg Schools High School Trials 2026 (U15 Girls) | Rapid | 2026-02-21 | 2026-02-21 | Overberg (WOS) | 6 | 1519.4 | 6 | 5 | 1602.9 | 7.3 | Details |
| 4 | 2025 Mzansi Individual Championships (U14 Girls) | Classical | 2025-12-17 | 2025-12-20 | Nelson Mandela Bay (ENM) | 6 | 1541 | 6 | 3.5 | 1500.3 | -4 | Details |
| 5 | 2025 Mzansi Inter Provincial Team Championships (U14 Girls) | Standard | 2025-12-15 | 2025-12-17 | Nelson Mandela Bay (ENM) | 6 | 1541 | 6 | 5.5 | 1666.9 | 15.1 | Details |
| 6 | Kraaifontein Open 2025 (Junior Rapid U14) | Rapid | 2025-12-06 | 2025-12-06 | Cape Town (WCT) | 6 | 1541 | 6 | 2.5 | 1247.9 | -24.6 | Details |
| 7 | Hermanus Chess Club November Blitz 2025 (Junior) | Blitz | 2025-11-29 | 2025-11-29 | Overberg (WOS) | 9 | 1532.8 | 9 | 7 | 1631.9 | 5.1 | Details |
| 8 | Curro Chess Open Rapid 2025 (U14) | Rapid | 2025-08-23 | 2025-08-23 | Cape Town (WCT) | 6 | 1523.8 | 6 | 3 | 1355.9 | -12.6 | Details |
| 9 | Overberg Top Schools 2025 (U13) | Standard | 2025-08-02 | 2025-08-02 | Overberg (WOS) | 5 | 1523.8 | 5 | 5 | 1716 | 18.3 | Details |
| 10 | Cape Winelands Open 2025 (U14) | Standard | 2025-07-19 | 2025-07-19 | Cape Winelands (WCW) | 5 | 1490.2 | 5 | 4 | 1615.4 | 11.6 | Details |
| 11 | Western Cape Schools Individual Championship 2025 (U13 Girls) | Standard | 2025-05-17 | 2025-05-18 | Cape Winelands (WCW) | 6 | 1400.2 | 6 | 4.5 | 1725.9 | 38 | Details |
| 12 | West Coast And Mykonos Open 2025 (U14) | Standard | 2025-05-02 | 2025-05-04 | West Coast (WCU) | 5 | 1400.2 | 5 | 3 | 1446.2 | 4.3 | Details |
| 13 | South African Junior Closed Chess Championships 2025 (U14 Girls) | Classical | 2025-03-31 | 2025-04-05 | Cape Winelands (WCW) | 9 | 1391.6 | 9 | 4 | 1414 | 5.4 | Details |
| 14 | Cape Town Open Chess Festival 2025 (U14) | Standard | 2025-03-22 | 2025-03-23 | Cape Town (WCT) | 6 | 1398.9 | 5 | 2 | 1224.2 | -16.3 | Details |
| 15 | Overberg Schools - PS Closed 2025 (U13 Girls) | Standard | 2025-03-08 | 2025-03-08 | Overberg (WOS) | 5 | 1398.9 | 4 | 3 | 1531.8 | 10.5 | Details |
| 16 | Overberg Schools - PS Trials (Region 1) 2025 (U13 Girls) | Rapid | 2025-02-22 | 2025-02-22 | Overberg (WOS) | 6 | 1387.6 | 6 | 4.5 | 1481.1 | 7.1 | Details |
| 17 | Helderberg Chess Club PS Development Tournament 2025 (U13 Girls) | Standard | 2025-01-25 | 2025-01-25 | Cape Town (WCT) | 5 | 1337.4 | 5 | 3 | 1408.5 | 7.6 | Details |
| 18 | Mzansi Interprovincial Youth Chess Championships 2024 (U14 Girls Championship) | Classical | 2024-12-16 | 2024-12-19 | Capricorn (LCP) | 7 | 1379.6 | 6 | 2 | 1193.6 | -26.2 | Details |
| 19 | Overberg GP Invitational Day 2 2024 (B) | Standard | 2024-09-27 | 2024-09-27 | Overberg (WOS) | 5 | 1400.9 | 5 | 3.5 | 1437.1 | 3 | Details |
| 20 | Overberg GP Invitational Day 1 2024 (B) | Standard | 2024-09-26 | 2024-09-26 | Overberg (WOS) | 5 | 1400.9 | 5 | 3 | 1375.4 | -3.2 | Details |
| 21 | Kingsway Chess Open 2024 (U12) | Rapid | 2024-09-14 | 2024-09-14 | Overberg (WOS) | 6 | 1400.9 | 6 | 3 | 1434.3 | 1.3 | Details |
| 22 | Western Cape Top Schools Championship 2024 (U13 Mixed) | Standard | 2024-08-30 | 2024-09-01 | Eden (WEG) | 6 | 1400.9 | 6 | 2 | 1278.1 | -14.4 | Details |
| 23 | Overberg Schools - Top Schools 2024 (U13 Mixed) | Standard | 2024-07-27 | 2024-07-27 | Overberg (WOS) | 5 | 1362.9 | 5 | 5 | 1595.9 | 23.7 | Details |
| 24 | Western Cape PS Individuals Championship 2024 (U13 Girls) | Standard | 2024-05-04 | 2024-05-05 | West Coast (WCU) | 6 | 1374.9 | 6 | 3 | 1309.5 | -7.5 | Details |
| 25 | Hermanus Chess Club Open 2024 (Intermediate) | Rapid | 2024-04-20 | 2024-04-20 | Overberg (WOS) | 7 | 1421.1 | 7 | 2 | 1041.9 | -29 | Details |
| 26 | Overberg Schools - PS Closed 2024 (U13 Girls) | Standard | 2024-03-16 | 2024-03-16 | Overberg (WOS) | 5 | 1437 | 5 | 4 | 1410.9 | -1.7 | Details |
| 27 | Overberg Schools - PS Trials Region 3 2024 (U13 Girls) | Rapid | 2024-03-02 | 2024-03-02 | Overberg (WOS) | 5 | 1437 | 5 | 3 | 1309.5 | -8.3 | Details |
| 28 | 2023 Western Cape Rural Cup (U12) | Standard | 2023-12-09 | 2023-12-10 | Cape Winelands (WCW) | 5 | 1410.4 | 4 | 3 | 1624.8 | 16.8 | Details |
| 29 | Bonnievale Open Rapid 2023 (U12) | Rapid | 2023-10-21 | 2023-10-21 | Cape Winelands (WCW) | 6 | 1411.6 | 6 | 3.5 | 1401.8 | -0.7 | Details |
| 30 | Western Cape Top Schools 2023 (U11 Mixed) | Standard | 2023-09-02 | 2023-09-03 | Cape Winelands (WCW) | 6 | 1419.3 | 6 | 3.5 | 1375.6 | -5 | Details |
| 31 | Overberg Top Schools 2023 (U11) | Standard | 2023-08-05 | 2023-08-05 | Overberg (WOS) | 5 | 1400.2 | 5 | 4.5 | 1511.9 | 11.8 | Details |
| 32 | Overberg Club Championships 2023 (A+B) | Rapid | 2023-07-29 | 2023-07-29 | Overberg (WOS) | 5 | 1384.2 | 5 | 4 | 1515 | 8.9 | Details |
| 33 | Zwelihle Chess Club Rapid 2023 (C) | Rapid | 2023-06-17 | 2023-06-17 | Overberg (WOS) | 6 | 1364.7 | 6 | 5 | 1526.5 | 10.9 | Details |
| 34 | Western Cape PS Individuals 2023 (U11 Girls) | Standard | 2023-05-05 | 2023-05-06 | Cape Town (WCT) | 6 | 1252.1 | 6 | 6 | 1768.5 | 60.4 | Details |
| 35 | Hermanus Rapid 2023 (C) | Rapid | 2023-04-22 | 2023-04-22 | Overberg (WOS) | 6 | 1280.5 | 6 | 2 | 1071.5 | -16 | Details |
| 36 | Overberg School Chess Closed Tournament 2023 (U11 Girls) | Standard | 2023-03-25 | 2023-03-25 | Overberg (WOS) | 5 | 1206.6 | 5 | 4 | 1488.1 | 28.2 | Details |
| 37 | Overberg Primary School Trials (Region 2) | Rapid | 2023-02-24 | 2023-03-10 | Overberg (WOS) | 6 | 1206.6 | 5 | 3.5 | 1401.3 | 11.2 | Details |
| 38 | Overberg Schools Open Tournament 2023 (U12) | Rapid | 2023-02-11 | 2023-02-11 | Overberg (WOS) | 5 | 1199.3 | 5 | 3 | 1259.3 | 3.8 | Details |
| 39 | OCF Youth Day Tournament 2022 (C) | Rapid | 2022-06-18 | 2022-06-18 | Overberg (WOS) | 5 | 1164.7 | 5 | 4.5 | 1549.8 | 17.2 | Details |
| 40 | Western Cape Schools 2022 (U11 Girls) | Standard | 2022-05-28 | 2022-05-29 | Cape Winelands (WCW) | 6 | 1197.3 | 5 | 1 | 1027.4 | -16.4 | Details |
| 41 | Overberg Primary Schools Closed 2022 (U11 Girls) | Standard | 2022-03-12 | 2022-03-12 | Overberg (WOS) | 5 | 1200 | 4 | 2 | 1184 | -1.2 | Details |
Game statistics ( )
| Games | 7 |
| Wins | 1 |
| Draws | 1 |
| Losses | 5 |
| White | 4 |
| Black | 3 |
| White wins | 0 |
| Black wins | 1 |
| Score | 1.5 |
| Percent | 21.4 |
| Dp | -242.9 |
| AOR | 1471.6 |
| Performance | 1228.7 |
Game statistics ()
| Games | 32 |
| Wins | 16 |
| Draws | 4 |
| Losses | 12 |
| White | 16 |
| Black | 16 |
| White wins | 7 |
| Black wins | 9 |
| Score | 18 |
| Percent | 56.2 |
| Dp | 53.1 |
| AOR | 1419.6 |
| Performance | 1472.7 |
Game statistics (History)
| Games | 244 |
| Wins | 142 |
| Draws | 21 |
| Losses | 81 |
| White | 121 |
| Black | 123 |
| White wins | 71 |
| Black wins | 71 |
| Score | 152.5 |
| Percent | 62.5 |
| Dp | 106.2 |
| AOR | 1322.8 |
| Performance | 1429 |
Rankings (Main)
| National | |
| Overall | 1855 |
| Gender | 223 |
| Age group | 200 |
| Gender/Age | 39 |
| Provincial | |
| Overall | 567 |
| Gender | 83 |
| Age group | 62 |
| Gender/Age | 11 |
| Regional | |
| Overall | 20 |
| Gender | 3 |
| Age group | 4 |
| Gender/Age | 2 |
Rankings (Standard)
| National | |
| Overall | 1499 |
| Gender | 170 |
| Age group | 167 |
| Gender/Age | 30 |
| Provincial | |
| Overall | 448 |
| Gender | 65 |
| Age group | 50 |
| Gender/Age | 9 |
| Regional | |
| Overall | 13 |
| Gender | 2 |
| Age group | 3 |
| Gender/Age | 2 |
Rankings (Rapid)
| National | |
| Overall | 1099 |
| Gender | 163 |
| Age group | 204 |
| Gender/Age | 48 |
| Provincial | |
| Overall | 538 |
| Gender | 92 |
| Age group | 97 |
| Gender/Age | 23 |
| Regional | |
| Overall | 59 |
| Gender | 16 |
| Age group | 9 |
| Gender/Age | 5 |
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 | 16 |
| Score | 7 |
| Percent | 43.8 |
| Aor | 1488.8 |
| Dp | -53.1 |
| Prat | 1435.7 |
Performance ()
| Games | 32 |
| Score | 18 |
| Percent | 56.2 |
| Aor | 1419.6 |
| Dp | 53.1 |
| Prat | 1472.7 |
Performance (12 months)
| Games | 86 |
| Score | 56 |
| Percent | 65.1 |
| Aor | 1391.1 |
| Dp | 128.5 |
| Prat | 1519.6 |
Performance (History)
| Games | 244 |
| Score | 152.5 |
| Percent | 62.5 |
| Aor | 1322.8 |
| Dp | 106.2 |
| Prat | 1429 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Stevens, DA (Danielle-Ann) | 10 | 6 | 4 | Overberg Primary Schools Closed 2022 (U11 Girls) | Overberg Schools High School Closed 2026 (U15 Girls) | Details |
| Overall | 2 | Cilliers, D (Dene) | 5 | 3 | 2 | Bonnievale Open Rapid 2023 (U12) | Cape Winelands Open 2025 (U14) | Details |
| Overall | 3 | Buhr, G (Gretchen) | 5 | 0 | 5 | Overberg Primary Schools Closed 2022 (U11 Girls) | Overberg Schools High School Closed 2026 (U15 Girls) | Details |
| Overall | 4 | Hagen, S (Sophia) | 4 | 2 | 2 | Mzansi Interprovincial Youth Chess Championships 2024 (U14 Girls Championship) | 2025 Mzansi Individual Championships (U14 Girls) | Details |
| Overall | 5 | Webb, A (Amori) | 3 | 2 | 1 | Bonnievale Open Rapid 2023 (U12) | Helderberg Chess Club PS Development Tournament 2025 (U13 Girls) | Details |
| Standard | 1 | Stevens, DA (Danielle-Ann) | 5 | 3 | 2 | Overberg Primary Schools Closed 2022 (U11 Girls) | Overberg Schools High School Closed 2026 (U15 Girls) | Details |
| Standard | 2 | Hagen, S (Sophia) | 4 | 2 | 2 | Mzansi Interprovincial Youth Chess Championships 2024 (U14 Girls Championship) | 2025 Mzansi Individual Championships (U14 Girls) | Details |
| Standard | 3 | Cilliers, D (Dene) | 3 | 2 | 1 | 2023 Western Cape Rural Cup (U12) | Cape Winelands Open 2025 (U14) | Details |
| Standard | 4 | Buhr, G (Gretchen) | 3 | 0 | 3 | Overberg Primary Schools Closed 2022 (U11 Girls) | Overberg Schools High School Closed 2026 (U15 Girls) | Details |
| Standard | 5 | Beyers, S (Skylar) | 3 | 0 | 3 | Overberg School Chess Closed Tournament 2023 (U11 Girls) | Western Cape Top Schools 2023 (U11 Mixed) | Details |
| Rapid | 1 | Stevens, DA (Danielle-Ann) | 5 | 3 | 2 | OCF Youth Day Tournament 2022 (C) | Overberg Schools High School Trials 2026 (U15 Girls) | Details |
| Rapid | 2 | Ntontelo, K (Khazimla) | 2 | 2 | 0 | Overberg Primary School Trials (Region 2) | Overberg Schools - PS Trials (Region 1) 2025 (U13 Girls) | Details |
| Rapid | 3 | Buhr, G (Gretchen) | 2 | 0 | 2 | Overberg Primary School Trials (Region 2) | Overberg Schools High School Trials 2026 (U15 Girls) | Details |
| Rapid | 4 | Cilliers, D (Dene) | 2 | 1 | 1 | Bonnievale Open Rapid 2023 (U12) | Kingsway Chess Open 2024 (U12) | Details |