PLAYER PAGE
Jacqui Grobbelaar
294011237Cape Town (WCT)Personal
Main rating
| Rating | 1671.6 |
| K-factor | 28 |
| Floor | 1269.1 |
| Highest | 1769.1 (2025-09-01) |
| Min/Max +/- allowed | 74 |
| Rating Change () | |
| Games | 7 |
| Score | 2.5 |
| We | 2.75 |
| SWe | -0.12 |
| Temp +/- | -3.3 |
| Penalties | 0 |
| Weight perform | 1581.7 |
| Final +/- | -3.3 |
| New Rating () | |
| Rating | 1668.3 |
| K-factor | 28 |
| Floor | 1269.1 |
| Highest | 1769.1 (2025-09-01) |
| Min/Max +/- allowed | 73.7 |
Standard rating
| Rating | 1696.5 |
| K-factor | 28 |
| Floor | 1252.8 |
| Highest | 1772.6 (2026-01-01) |
| Min/Max +/- allowed | 73.3 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1707.2 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1696.5 |
| K-factor | 28 |
| Floor | 1252.8 |
| Highest | 1772.6 (2026-01-01) |
| Min/Max +/- allowed | 73.3 |
Rapid rating
| Rating | 1585.4 |
| K-factor | 28 |
| Floor | 1213.8 |
| Highest | 1713.8 (2018-02-01) |
| Min/Max +/- allowed | 79.7 |
| Rating Change () | |
| Games | 7 |
| Score | 2.5 |
| We | 3.02 |
| SWe | -0.52 |
| Temp +/- | -14.6 |
| Penalties | 0 |
| Weight perform | 1579.8 |
| Final +/- | -14.6 |
| New Rating () | |
| Rating | 1570.8 |
| K-factor | 28 |
| Floor | 1213.8 |
| Highest | 1713.8 (2018-02-01) |
| Min/Max +/- allowed | 79.7 |
Blitz rating
| Rating | 1653.3 |
| K-factor | 28 |
| Floor | 1223.6 |
| Highest | 1723.6 (2019-12-01) |
| Min/Max +/- allowed | 78.6 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1427.1 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1653.3 |
| K-factor | 28 |
| Floor | 1223.6 |
| Highest | 1723.6 (2019-12-01) |
| Min/Max +/- allowed | 78.6 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Hermanus Chess Club Open 2026 (Championship) | Rapid | 2026-04-18 | 2026-04-18 | Overberg (WOS) | 7 | 1671.6 | 7 | 2.5 | 1637 | -3.3 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Cape Winelands Open Rapid 2026 (Championship) | Rapid | 2026-03-14 | 2026-03-14 | Cape Winelands (WCW) | 6 | 1729.3 | 6 | 1 | 1520.6 | -19.5 | Details |
| 2 | 2026 South African Closed Chess Championships (Woman ) | Classical | 2026-02-21 | 2026-03-01 | Johannesburg Metro (GJM) | 11 | 1729.3 | 11 | 3 | 1621.6 | -38.2 | Details |
| 3 | Helderberg Chess Club Open 2026 (A) | Standard | 2026-01-17 | 2026-01-17 | Cape Town (WCT) | 5 | 1766 | 3 | 1 | 1457.1 | -18.8 | Details |
| 4 | Kraaifontein Open 2025 (Championship) | Standard | 2025-12-06 | 2025-12-07 | Cape Town (WCT) | 5 | 1723.1 | 5 | 2.5 | 1904 | 20.5 | Details |
| 5 | Cape Town Chess Federation Club League 2025 (B) | Classical | 2025-07-26 | 2025-09-27 | Cape Town (WCT) | 11 | 1769.1 | 5 | 2 | 1495 | -32.8 | Details |
| 6 | Western Cape Women’s Championship 2025 (Elite) | Standard | 2025-08-08 | 2025-08-10 | West Coast (WCU) | 6 | 1733.2 | 6 | 5.5 | 1920.5 | 25.6 | Details |
| 7 | Bellville Rapid 2025 (A) | Rapid | 2025-06-07 | 2025-06-07 | Cape Town (WCT) | 6 | 1723.4 | 6 | 3 | 1832.8 | 7.1 | Details |
| 8 | Cape Winelands Queens 2025 (Championship) | Rapid | 2025-06-21 | 2025-06-21 | Cape Winelands (WCW) | 6 | 1714.3 | 6 | 4.5 | 1797.4 | 6.5 | Details |
| 9 | Moja Chess Extravaganza 2025 (Ladies) | Classical | 2025-04-26 | 2025-05-01 | Johannesburg Metro (GJM) | 9 | 1642.4 | 9 | 7 | 1890.1 | 54.4 | Details |
| 10 | Moja Chess Extravaganza 2025 (Blitz) | Blitz | 2025-04-26 | 2025-04-26 | Johannesburg Metro (GJM) | 7 | 1642.4 | 6 | 3.5 | 1527.2 | -3.1 | Details |
| 11 | 2025 CT Chess Club Blitz Championship | Blitz | 2025-03-19 | 2025-03-19 | Cape Town (WCT) | 9 | 1636.9 | 9 | 5 | 1767.3 | 3.9 | Details |
| 12 | Western Cape Closed 2025 (A) | Standard | 2025-03-08 | 2025-03-09 | Cape Town (WCT) | 6 | 1620.3 | 6 | 2.5 | 1711.5 | 11.8 | Details |
| 13 | Cape Town Masters Challenge 2025 (Blitz) | Blitz | 2025-01-09 | 2025-01-09 | Cape Town (WCT) | 7 | 1596.4 | 7 | 4 | 1819.1 | 8 | Details |
| 14 | Cape Town Masters Challenge 2025 (Masters) | Classical | 2025-01-06 | 2025-01-11 | Cape Town (WCT) | 9 | 1596.4 | 7 | 1.5 | 1525.1 | -12.8 | Details |
| 15 | 2025 Kraaifontein Open Chess Championships (Championship) | Standard | 2025-01-04 | 2025-01-05 | Cape Town (WCT) | 5 | 1596.4 | 5 | 2.5 | 1804.7 | 22 | Details |
| 16 | 2024 Moja Chess Extravaganza (Ladies) | Classical | 2024-09-25 | 2024-09-29 | Frances Baard (NCF) | 9 | 1599.8 | 9 | 6 | 1714.1 | 23.4 | Details |
| 17 | CT League 2024 (C) | Classical | 2024-07-20 | 2024-09-07 | Cape Town (WCT) | 11 | 1599.8 | 6 | 2.5 | 1403.9 | -25.8 | Details |
| 18 | Western Cape Women’s Championship 2024 (Elite) | Classical | 2024-08-08 | 2024-08-11 | West Coast (WCU) | 6 | 1586.9 | 6 | 4 | 1651.3 | 9.2 | Details |
| 19 | Steinitz Chess Festival 2024 (Championship) | Standard | 2024-05-10 | 2024-05-12 | Cape Town (WCT) | 6 | 1601.4 | 4 | 1 | 1481.9 | -10.3 | Details |
| 20 | Hermanus Chess Club Open 2024 (Advanced) | Rapid | 2024-04-20 | 2024-04-20 | Overberg (WOS) | 7 | 1590.8 | 7 | 4 | 1530 | -4.2 | Details |
| 21 | South African Closed Chess Championship 2024 (Ladies) | Classical | 2024-03-25 | 2024-04-02 | Cape Town (WCT) | 11 | 1590.8 | 11 | 4.5 | 1635.4 | 11.8 | Details |
| 22 | Cape of Good Hope Open Chess Tournament 2024 (Championship) | Standard | 2024-02-17 | 2024-02-17 | Cape Town (WCT) | 5 | 1618.2 | 5 | 0.5 | 1436.5 | -19.5 | Details |
| 23 | Kraaifontein Open 2023 (Adanced) | Standard | 2023-12-09 | 2023-12-10 | Cape Town (WCT) | 6 | 1595.1 | 5 | 3.5 | 1750.8 | 16.8 | Details |
| 24 | Western Cape Closed Championship 2023 (Blitz) | Blitz | 2023-09-23 | 2023-09-25 | Cape Town (WCT) | 7 | 1591.7 | 7 | 4.5 | 1652.2 | 2.5 | Details |
| 25 | CW Top Schools 2023 (Elite) | Standard | 2023-08-11 | 2023-08-13 | West Coast (WCU) | 6 | 1551.7 | 6 | 4.5 | 1768.9 | 28.7 | Details |
| 26 | Hermanus Rapid 2023 (A) | Rapid | 2023-04-22 | 2023-04-22 | Overberg (WOS) | 6 | 1536.9 | 6 | 2.5 | 1677.3 | 10.6 | Details |
| 27 | Chess WP Individual Blitz 2023 (Open) | Blitz | 2023-01-03 | 2023-01-03 | Cape Town (WCT) | 7 | 1537 | 7 | 4 | 1529.7 | 0 | Details |
| 28 | Western Cape Woman`s Championship 2022 (Elite) | Standard | 2022-09-02 | 2022-09-04 | West Coast (WCU) | 5 | 1563.8 | 4 | 0 | 1348.5 | -19.1 | Details |
| 29 | South African Open 2022 (Championship) | Classical | 2022-07-09 | 2022-07-17 | Cape Town (WCT) | 11 | 1581.2 | 11 | 4 | 1617.5 | 9.8 | Details |
| 30 | Curro Durbanville Chess Open Rapid 2022 (A) | Rapid | 2022-07-02 | 2022-07-02 | Cape Town (WCT) | 6 | 1581.2 | 5 | 2 | 1218.6 | -22.5 | Details |
| 31 | 2022 South African Closed Chess Championships (Women) | Classical | 2022-05-08 | 2022-05-14 | Chess South Africa (CSA) | 7 | 1593.5 | 6 | 1.5 | 1533.4 | -8.8 | Details |
| 32 | Moja Open 2022 (Ladies) | Classical | 2022-03-19 | 2022-03-22 | Frances Baard (NCF) | 7 | 1616.7 | 7 | 4.5 | 1587.7 | -3.6 | Details |
| 33 | 2022 Chris Greyling Open (A) | Standard | 2022-03-12 | 2022-03-12 | Tshwane (GTP) | 5 | 1616.7 | 4 | 1 | 1471.5 | -12.6 | Details |
| 34 | 2022 Tshwane Chess Open Registration Tournament (A) | Standard | 2022-01-29 | 2022-01-29 | Tshwane (GTP) | 5 | 1613.7 | 5 | 2.5 | 1612.2 | 2.2 | Details |
| 35 | 2021 Milos Ristic Open (A) | Standard | 2021-10-09 | 2021-10-09 | Tshwane (GTP) | 5 | 1613.2 | 5 | 2 | 1624.3 | 0.5 | Details |
| 36 | 2021 Gauteng North Open Tournament (A) | Standard | 2021-08-28 | 2021-08-29 | Tshwane (GTP) | 5 | 1622.7 | 5 | 1 | 1560.1 | -6.9 | Details |
| 37 | 2021 Blou Bul Tournament (A) | Standard | 2021-04-10 | 2021-04-10 | Mangaung (FMB) | 5 | 1643.4 | 5 | 1.5 | 1493.5 | -14.8 | Details |
| 38 | Ekurhuleni Chess Chessa Open 2021 (A) | Standard | 2021-03-27 | 2021-03-28 | Ekurhuleni (GE) | 5 | 1597.6 | 5 | 4.5 | 1900 | 32.6 | Details |
| 39 | 2020 Waterkloof Open (A) | Standard | 2020-02-29 | 2020-03-01 | Tshwane (GTP) | 5 | 1564.1 | 4 | 2 | 1712.4 | 12.2 | Details |
| 40 | 2020 Piet Robbertse (A) | Classical | 2020-01-31 | 2020-02-02 | Cape Winelands (WCW) | 5 | 1562.7 | 5 | 2.5 | 1564.2 | 1 | Details |
| 41 | 2019 Inter Region Chess Championships | Classical | 2020-01-09 | 2020-01-12 | 4 Knights (4K) | 7 | 1510.1 | 6 | 3 | 1789.8 | 37.6 | Details |
| 42 | 2019 South African Closed Chess Championships (Women A) | Classical | 2019-12-07 | 2019-12-17 | Cape Town (WCT) | 11 | 1538.1 | 11 | 2.5 | 1460.4 | -19.8 | Details |
| 43 | 2019 Centurion Open (A) | Standard | 2019-09-28 | 2019-09-28 | Tshwane (GTP) | 5 | 1556.2 | 5 | 1.5 | 1416.4 | -12.9 | Details |
| 44 | 2019 Jacaranda Round Robin (B) | Standard | 2019-08-03 | 2019-08-03 | Tshwane (GTP) | 5 | 1571.8 | 5 | 2 | 1513.3 | -5 | Details |
| 45 | 2019 Alekhine Open (A) | Classical | 2019-08-09 | 2019-08-10 | Tshwane (GTP) | 5 | 1571.8 | 5 | 2 | 1571.5 | -5.8 | Details |
| 46 | 2019 Chris Greyling (A) | Standard | 2019-04-27 | 2019-04-27 | Tshwane (GTP) | 5 | 1578.1 | 5 | 2 | 1571.3 | -1.5 | Details |
| 47 | 2019 Capablanca Chess Festival (Swiss A) | Standard | 2019-04-19 | 2019-04-21 | Tshwane (GTP) | 7 | 1578.1 | 7 | 3.5 | 1552.4 | -3.2 | Details |
| 48 | 2019 Waterkloof Open (A) | Standard | 2019-03-02 | 2019-03-03 | Tshwane (GTP) | 5 | 1611.3 | 5 | 1.5 | 1404.5 | -23.6 | Details |
| 49 | 2018 Inter Region Chess Championships | Classical | 2018-12-21 | 2018-12-24 | 4 Knights (4K) | 7 | 1639 | 6 | 2.5 | 1508.1 | -20 | Details |
| 50 | 2018 Alekhine Open (A) | Standard | 2018-08-09 | 2018-08-11 | Tshwane (GTP) | 6 | 1680.6 | 6 | 2.5 | 1455.7 | -29.6 | Details |
Game statistics ( )
| Games | 7 |
| Wins | 2 |
| Draws | 1 |
| Losses | 4 |
| White | 3 |
| Black | 4 |
| White wins | 1 |
| Black wins | 1 |
| Score | 2.5 |
| Percent | 35.7 |
| Dp | -121.4 |
| AOR | 1758.4 |
| Performance | 1637 |
Game statistics ()
| Games | 27 |
| Wins | 7 |
| Draws | 1 |
| Losses | 19 |
| White | 13 |
| Black | 14 |
| White wins | 3 |
| Black wins | 4 |
| Score | 7.5 |
| Percent | 27.8 |
| Dp | -188.9 |
| AOR | 1773.8 |
| Performance | 1584.9 |
Game statistics (History)
| Games | 364 |
| Wins | 142 |
| Draws | 48 |
| Losses | 174 |
| White | 178 |
| Black | 186 |
| White wins | 71 |
| Black wins | 71 |
| Score | 166 |
| Percent | 45.6 |
| Dp | -37.4 |
| AOR | 1659.1 |
| Performance | 1621.8 |
Rankings (Main)
| National | |
| Overall | 611 |
| Gender | 37 |
| Age group | 339 |
| Gender/Age | 15 |
| Provincial | |
| Overall | 187 |
| Gender | 11 |
| Age group | 105 |
| Gender/Age | 6 |
| Regional | |
| Overall | 138 |
| Gender | 7 |
| Age group | 82 |
| Gender/Age | 4 |
Rankings (Standard)
| National | |
| Overall | 497 |
| Gender | 32 |
| Age group | 277 |
| Gender/Age | 14 |
| Provincial | |
| Overall | 143 |
| Gender | 9 |
| Age group | 86 |
| Gender/Age | 6 |
| Regional | |
| Overall | 112 |
| Gender | 6 |
| Age group | 68 |
| Gender/Age | 4 |
Rankings (Rapid)
| National | |
| Overall | 181 |
| Gender | 7 |
| Age group | 86 |
| Gender/Age | 2 |
| Provincial | |
| Overall | 88 |
| Gender | 5 |
| Age group | 34 |
| Gender/Age | 2 |
| Regional | |
| Overall | 54 |
| Gender | 2 |
| Age group | 26 |
| Gender/Age | 2 |
Rankings (Blitz)
| National | |
| Overall | 68 |
| Gender | 1 |
| Age group | 45 |
| Gender/Age | 1 |
| Provincial | |
| Overall | 32 |
| Gender | 1 |
| Age group | 20 |
| Gender/Age | 1 |
| Regional | |
| Overall | 21 |
| Gender | 1 |
| Age group | 14 |
| Gender/Age | 1 |
Performance ( )
| Games | 7 |
| Score | 2.5 |
| Percent | 35.7 |
| Aor | 1758.4 |
| Dp | -121.4 |
| Prat | 1637 |
Performance ()
| Games | 27 |
| Score | 7.5 |
| Percent | 27.8 |
| Aor | 1773.8 |
| Dp | -188.9 |
| Prat | 1584.9 |
Performance (12 months)
| Games | 70 |
| Score | 35.5 |
| Percent | 50.7 |
| Aor | 1697.7 |
| Dp | 6.1 |
| Prat | 1703.8 |
Performance (History)
| Games | 364 |
| Score | 166 |
| Percent | 45.6 |
| Aor | 1659.1 |
| Dp | -37.4 |
| Prat | 1621.8 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Laubscher, A (Anzel) | 8 | 6 | 2 | 2019 South African Closed Chess Championships (Women A) | 2026 South African Closed Chess Championships (Woman ) | Details |
| Overall | 2 | February, JN (Jesse Nikki) | 7 | 6 | 1 | 2019 South African Closed Chess Championships (Women A) | Moja Chess Extravaganza 2025 (Ladies) | Details |
| Overall | 3 | Klaasen, RJ (Robyn Julian) | 5 | 0 | 5 | 2019 South African Closed Chess Championships (Women A) | 2026 South African Closed Chess Championships (Woman ) | Details |
| Overall | 4 | Fourie, B (Brandon) | 4 | 2 | 2 | 2018 Piet Robbertse Chess Tournament (Prestige) | 2022 Tshwane Chess Open Registration Tournament (A) | Details |
| Overall | 5 | Joya, I (Imkhita) | 4 | 2 | 2 | South African Closed Chess Championship 2024 (Ladies) | 2026 South African Closed Chess Championships (Woman ) | Details |
| Standard | 1 | Laubscher, A (Anzel) | 8 | 6 | 2 | 2019 South African Closed Chess Championships (Women A) | 2026 South African Closed Chess Championships (Woman ) | Details |
| Standard | 2 | February, JN (Jesse Nikki) | 7 | 6 | 1 | 2019 South African Closed Chess Championships (Women A) | Moja Chess Extravaganza 2025 (Ladies) | Details |
| Standard | 3 | Klaasen, RJ (Robyn Julian) | 5 | 0 | 5 | 2019 South African Closed Chess Championships (Women A) | 2026 South African Closed Chess Championships (Woman ) | Details |
| Standard | 4 | Du Plessis, AC (Anika) | 4 | 2 | 2 | 2019 South African Closed Chess Championships (Women A) | CW Top Schools 2023 (Elite) | Details |
| Standard | 5 | Joya, I (Imkhita) | 4 | 2 | 2 | South African Closed Chess Championship 2024 (Ladies) | 2026 South African Closed Chess Championships (Woman ) | Details |
| Rapid | 1 | Mnyasta, T (Tezihano) | 2 | 0 | 2 | Bellville Rapid 2025 (A) | Cape Winelands Open Rapid 2026 (Championship) | Details |
| Rapid | 2 | Schuller, A (Ashley Marlon) | 2 | 0 | 2 | Hermanus Rapid 2023 (A) | Hermanus Chess Club Open 2024 (Advanced) | Details |
| Rapid | 3 | Louw, FWT (Frederik Wignand Terblanche) | 2 | 1 | 1 | Hermanus Chess Club Open 2024 (Advanced) | Cape Winelands Open Rapid 2026 (Championship) | Details |
| Blitz | 1 | De Villiers, AM (Ammen Mohammed) | 2 | 2 | 0 | Chess WP Individual Blitz 2023 (Open) | Western Cape Closed Championship 2023 (Blitz) | Details |
| Blitz | 2 | Braaf, J (Jiraan) | 2 | 2 | 0 | Cape Town Masters Challenge 2025 (Blitz) | 2025 CT Chess Club Blitz Championship | Details |
| Blitz | 3 | Salimu, R (Reuben) | 2 | 1 | 1 | Western Cape Closed Championship 2023 (Blitz) | Cape Town Masters Challenge 2025 (Blitz) | Details |