PLAYER PAGE
Isabelle de Villiers
2160314888Overberg (WOS)Personal
Main rating
| Rating | 1311.4 |
| K-factor | 36 |
| Floor | 884.8 |
| Highest | 1384.8 (2026-02-28) |
| Min/Max +/- allowed | 127 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1221.4 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1311.4 |
| K-factor | 36 |
| Floor | 884.8 |
| Highest | 1384.8 (2026-02-28) |
| Min/Max +/- allowed | 127.4 |
Standard rating
| Rating | 1325.1 |
| K-factor | 36 |
| Floor | 898.2 |
| Highest | 1398.2 (2026-01-01) |
| Min/Max +/- allowed | 125 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1263.8 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1325.1 |
| K-factor | 36 |
| Floor | 898.2 |
| Highest | 1398.2 (2026-01-01) |
| Min/Max +/- allowed | 125 |
Rapid rating
| Rating | 1317.2 |
| K-factor | 36 |
| Floor | 817 |
| Highest | 1323.6 (2025-09-30) |
| Min/Max +/- allowed | 139 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1263.4 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1317.2 |
| K-factor | 36 |
| Floor | 817 |
| Highest | 1323.6 (2025-09-30) |
| Min/Max +/- allowed | 139 |
Blitz rating
| Rating | 1110.9 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-03-01) |
| 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 | 1110.9 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-03-01) |
| 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 | 2026 WCSC PS Individual Championship (U11 Girls) | Standard | 2026-05-16 | 2026-05-17 | Overberg (WOS) | 6 | 1329.6 | 6 | 3 | 1338 | 1.7 | Details |
| 2 | Moja Chess Extravaganza 2026 (U10) | Standard | 2026-04-25 | 2026-04-26 | Cape Town (WCT) | 5 | 1329.6 | 4 | 1 | 1190.5 | -19.9 | Details |
| 3 | South African Junior Closed Chess Championship 2026 (U10 Girls) | Classical | 2026-03-28 | 2026-04-02 | Bojanala Platina (NBR) | 9 | 1371.1 | 9 | 4 | 1295.3 | -30.3 | Details |
| 4 | South African Junior Closed Chess Championship 2026 (Blitz) | Blitz | 2026-03-31 | 2026-03-31 | Bojanala Platina (NBR) | 9 | 1371.1 | 9 | 2 | 1204.6 | -11.2 | Details |
| 5 | Overberg Schools Primary School Closed 2026 (U11 Girls) | Standard | 2026-03-21 | 2026-03-21 | Overberg (WOS) | 5 | 1384.8 | 5 | 3 | 1304.3 | -12.6 | Details |
| 6 | Overberg Schools Primary School Trials (Region 1) 2026 (U11 Girls) | Rapid | 2026-02-28 | 2026-02-28 | Overberg | 6 | 1384.8 | 6 | 4 | 1375.7 | -1.2 | Details |
| 7 | Overberg Schools Open Championship 2026 (U11) | Rapid | 2026-01-31 | 2026-01-31 | Overberg (WOS) | 6 | 1383.9 | 6 | 4 | 1386.9 | 0.3 | Details |
| 8 | 2025 Mzansi Inter Provincial Team Championships (U10 Combined) | Standard | 2025-12-15 | 2025-12-17 | Nelson Mandela Bay (ENM) | 6 | 1330.4 | 6 | 5 | 1571.9 | 29.7 | Details |
| 9 | UCT Open Chess Championship 2025 (U10) | Rapid | 2025-10-11 | 2025-10-11 | Cape Town (WCT) | 6 | 1353.8 | 6 | 2 | 1182.5 | -13.1 | Details |
| 10 | Kingsway Chess Open 2025 (U10) | Rapid | 2025-09-20 | 2025-09-20 | Overberg (WOS) | 6 | 1346 | 6 | 4 | 1410.8 | 4.3 | Details |
| 11 | De Villiers PS 2025 (U10 Boys+Girls) | Rapid | 2025-08-16 | 2025-08-16 | Cape Winelands (WCW) | 5 | 1343.6 | 5 | 3 | 1353.5 | 1.3 | Details |
| 12 | Cape Winelands Open 2025 (U10) | Standard | 2025-07-19 | 2025-07-19 | Cape Winelands (WCW) | 5 | 1323.1 | 5 | 3 | 1447.6 | 11.5 | Details |
| 13 | Cape Winelands Queens 2025 (U9) | Rapid | 2025-06-21 | 2025-06-21 | Cape Winelands (WCW) | 6 | 1313.2 | 6 | 4 | 1384 | 5.5 | Details |
| 14 | Western Cape Schools Individual Championship 2025 (U9 Girls) | Standard | 2025-05-17 | 2025-05-18 | Cape Winelands (WCW) | 6 | 1262.5 | 6 | 4 | 1457.5 | 22.7 | Details |
| 15 | Brave Knights Rapid 2025 (U9) | Rapid | 2025-05-03 | 2025-05-03 | Cape Winelands (WCW) | 6 | 1262.5 | 6 | 3 | 1335.8 | 5.4 | Details |
| 16 | Hermanus Chess Club Open 2025 (U10) | Rapid | 2025-04-12 | 2025-04-12 | Overberg (WOS) | 7 | 1262.5 | 0 | 0 | 0 | 0 | Details |
| 17 | Overberg Schools - PS Closed 2025 (U9 Girls) | Standard | 2025-03-08 | 2025-03-08 | Overberg (WOS) | 5 | 1221.2 | 5 | 4 | 1449 | 22.9 | Details |
| 18 | Overberg Schools - PS Trials (Region 1) 2025 (U9 Girls) | Rapid | 2025-02-22 | 2025-02-22 | Overberg (WOS) | 6 | 1200 | 6 | 4.5 | 1393.9 | 16.6 | Details |
| 19 | Curro Hermanus Summer Open 2025 (U9) | Rapid | 2025-02-08 | 2025-02-08 | Overberg (WOS) | 6 | 1200 | 6 | 2.5 | 1130.1 | -5.9 | 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 | 45 |
| Wins | 21 |
| Draws | 0 |
| Losses | 24 |
| White | 22 |
| Black | 23 |
| White wins | 9 |
| Black wins | 12 |
| Score | 21 |
| Percent | 46.7 |
| Dp | -28.3 |
| AOR | 1325.8 |
| Performance | 1297.5 |
Game statistics (History)
| Games | 108 |
| Wins | 59 |
| Draws | 2 |
| Losses | 47 |
| White | 53 |
| Black | 55 |
| White wins | 27 |
| Black wins | 32 |
| Score | 60 |
| Percent | 55.6 |
| Dp | 47.2 |
| AOR | 1293.9 |
| Performance | 1341.1 |
Rankings (Main)
| National | |
| Overall | 6067 |
| Gender | 1087 |
| Age group | 605 |
| Gender/Age | 134 |
| Provincial | |
| Overall | 1845 |
| Gender | 408 |
| Age group | 207 |
| Gender/Age | 61 |
| Regional | |
| Overall | 122 |
| Gender | 40 |
| Age group | 17 |
| Gender/Age | 6 |
Rankings (Standard)
| National | |
| Overall | 4986 |
| Gender | 887 |
| Age group | 508 |
| Gender/Age | 111 |
| Provincial | |
| Overall | 1467 |
| Gender | 329 |
| Age group | 170 |
| Gender/Age | 50 |
| Regional | |
| Overall | 74 |
| Gender | 26 |
| Age group | 11 |
| Gender/Age | 4 |
Rankings (Rapid)
| National | |
| Overall | 1811 |
| Gender | 294 |
| Age group | 249 |
| Gender/Age | 51 |
| Provincial | |
| Overall | 773 |
| Gender | 137 |
| Age group | 117 |
| Gender/Age | 32 |
| Regional | |
| Overall | 88 |
| Gender | 27 |
| 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 | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance ()
| Games | 45 |
| Score | 21 |
| Percent | 46.7 |
| Aor | 1325.8 |
| Dp | -28.3 |
| Prat | 1297.5 |
Performance (12 months)
| Games | 68 |
| Score | 35 |
| Percent | 51.5 |
| Aor | 1313.2 |
| Dp | 12.5 |
| Prat | 1325.7 |
Performance (History)
| Games | 108 |
| Score | 60 |
| Percent | 55.6 |
| Aor | 1293.9 |
| Dp | 47.2 |
| Prat | 1341.1 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Klopper, E (Elbe) | 3 | 2 | 1 | Western Cape Schools Individual Championship 2025 (U9 Girls) | South African Junior Closed Chess Championship 2026 (U10 Girls) | Details |
| Overall | 2 | Marais, J (Janli) | 3 | 3 | 0 | Overberg Schools - PS Trials (Region 1) 2025 (U9 Girls) | Overberg Schools Primary School Closed 2026 (U11 Girls) | Details |
| Overall | 3 | Edons, M (Mihandro) | 3 | 1 | 2 | Cape Winelands Open 2025 (U10) | South African Junior Closed Chess Championship 2026 (Blitz) | Details |
| Overall | 4 | Stevens, L (Legion) | 2 | 1 | 1 | Brave Knights Rapid 2025 (U9) | De Villiers PS 2025 (U10 Boys+Girls) | Details |
| Overall | 5 | Pekeer, C (Charlotte) | 2 | 1 | 1 | Overberg Schools Primary School Trials (Region 1) 2026 (U11 Girls) | Overberg Schools Primary School Closed 2026 (U11 Girls) | Details |
| Standard | 1 | Klopper, E (Elbe) | 3 | 2 | 1 | Western Cape Schools Individual Championship 2025 (U9 Girls) | South African Junior Closed Chess Championship 2026 (U10 Girls) | Details |
| Standard | 2 | Whyatt, C (Charles) | 2 | 2 | 0 | Cape Winelands Open 2025 (U10) | Moja Chess Extravaganza 2026 (U10) | Details |
| Rapid | 1 | Lourens, L (Lihan) | 2 | 2 | 0 | Brave Knights Rapid 2025 (U9) | UCT Open Chess Championship 2025 (U10) | Details |
| Rapid | 2 | Stevens, L (Legion) | 2 | 1 | 1 | Brave Knights Rapid 2025 (U9) | De Villiers PS 2025 (U10 Boys+Girls) | Details |
| Rapid | 3 | Beukes, B (Benjamin) | 2 | 2 | 0 | Kingsway Chess Open 2025 (U10) | UCT Open Chess Championship 2025 (U10) | Details |
| Rapid | 4 | Marais, J (Janli) | 2 | 2 | 0 | Overberg Schools - PS Trials (Region 1) 2025 (U9 Girls) | Overberg Schools Primary School Trials (Region 1) 2026 (U11 Girls) | Details |
| Rapid | 5 | Snyman, J (Jovanni) | 2 | 2 | 0 | Brave Knights Rapid 2025 (U9) | De Villiers PS 2025 (U10 Boys+Girls) | Details |