PLAYER PAGE
Marlo Grobbelaar
1160159271Overberg (WOS)Personal
Main rating
| Rating | 1217.1 |
| K-factor | 36 |
| Floor | 739.6 |
| Highest | 1447.3 (2023-09-01) |
| Min/Max +/- allowed | 117 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1170.4 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1217.1 |
| K-factor | 36 |
| Floor | 739.6 |
| Highest | 1447.3 (2023-09-01) |
| Min/Max +/- allowed | 116.6 |
Standard rating
| Rating | 1205.9 |
| K-factor | 36 |
| Floor | 748.2 |
| Highest | 1477.4 (2023-09-01) |
| Min/Max +/- allowed | 111.7 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1180.8 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1205.9 |
| K-factor | 36 |
| Floor | 748.2 |
| Highest | 1477.4 (2023-09-01) |
| Min/Max +/- allowed | 111.7 |
Rapid rating
| Rating | 1213.8 |
| K-factor | 36 |
| Floor | 716.9 |
| Highest | 1229.7 (2023-10-01) |
| Min/Max +/- allowed | 159 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1122.7 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1213.8 |
| K-factor | 36 |
| Floor | 716.9 |
| Highest | 1229.7 (2023-10-01) |
| Min/Max +/- allowed | 159 |
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 |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | 2026 WCSC PS Individual Championship (U11 Boys) | Standard | 2026-05-16 | 2026-05-17 | Overberg (WOS) | 6 | 1234 | 6 | 2 | 1154.5 | -16.9 | Details |
| 2 | Overberg Schools Primary School Closed 2026 (U11 Boys) | Standard | 2026-03-21 | 2026-03-21 | Overberg (WOS) | 5 | 1195 | 5 | 3 | 1365.5 | 31.1 | Details |
| 3 | Overberg Schools Primary School Trials (Region 1) 2026 (U11 Boys) | Rapid | 2026-02-28 | 2026-02-28 | Overberg | 6 | 1195 | 6 | 3 | 1247 | 7.9 | Details |
| 4 | Overberg Schools Open Championship 2026 (U11) | Rapid | 2026-01-31 | 2026-01-31 | Overberg (WOS) | 6 | 1200.7 | 6 | 2 | 1091.6 | -10.3 | Details |
| 5 | Curro Hermanus Spring Open 2025 (U9) | Rapid | 2025-10-18 | 2025-10-18 | Overberg (WOS) | 6 | 1210.3 | 6 | 2 | 1148.4 | -5.3 | Details |
| 6 | Kingsway Chess Open 2025 (U10) | Rapid | 2025-09-20 | 2025-09-20 | Overberg (WOS) | 6 | 1218.5 | 5 | 2 | 1222.5 | 0.6 | Details |
| 7 | Western Cape Schools - Top Schools 2025 (U9) | Standard | 2025-09-06 | 2025-09-07 | Overberg (WOS) | 6 | 1218.5 | 6 | 2 | 1175.8 | -5.1 | Details |
| 8 | Overberg Top Schools 2025 (U7+U9) | Standard | 2025-08-02 | 2025-08-02 | Overberg (WOS) | 5 | 1205.1 | 5 | 3 | 1288.4 | 7.5 | Details |
| 9 | Western Cape Schools Individual Championship 2025 (U9 Boys) | Standard | 2025-05-17 | 2025-05-18 | Cape Winelands (WCW) | 6 | 1223.9 | 6 | 2 | 1135.2 | -10.5 | Details |
| 10 | Overberg Schools - PS Closed 2025 (U9 Boys) | Standard | 2025-03-08 | 2025-03-08 | Overberg (WOS) | 5 | 1194.1 | 5 | 3 | 1357.5 | 16.6 | Details |
| 11 | Overberg Schools - PS Trials (Region 1) 2025 (U9 Boys) | Rapid | 2025-02-22 | 2025-02-22 | Overberg (WOS) | 6 | 1182.9 | 6 | 3 | 1231.5 | 4.1 | Details |
| 12 | Curro Hermanus Summer Open 2025 (U9) | Rapid | 2025-02-08 | 2025-02-08 | Overberg (WOS) | 6 | 1182.9 | 6 | 3 | 1233.4 | 4.2 | Details |
| 13 | Overberg Schools & Federation Open 2025 (U9) | Rapid | 2025-02-01 | 2025-02-01 | Overberg (WOS) | 6 | 1182.9 | 5 | 2 | 1160.2 | -2.2 | Details |
| 14 | Kingsway Chess Open 2024 (U8) | Rapid | 2024-09-14 | 2024-09-14 | Overberg (WOS) | 6 | 1187.9 | 5 | 2 | 1189.3 | 0.4 | Details |
| 15 | Western Cape Top Schools Championship 2024 (U9 Mixed) | Standard | 2024-08-30 | 2024-09-01 | Eden (WEG) | 6 | 1187.9 | 5 | 0 | 866.4 | -32.2 | Details |
| 16 | Overberg Schools - Top Schools 2024 (U7+U9 Mixed) | Standard | 2024-07-27 | 2024-07-27 | Overberg (WOS) | 5 | 1210.3 | 5 | 2 | 1075.2 | -12.4 | Details |
| 17 | Western Cape PS Individuals Championship 2024 (U9 Boys) | Standard | 2024-05-04 | 2024-05-05 | West Coast (WCU) | 6 | 1239.6 | 5 | 1 | 1069.8 | -16.3 | Details |
| 18 | Overberg Schools - PS Closed 2024 (U9 Boys) | Standard | 2024-03-16 | 2024-03-16 | Overberg (WOS) | 5 | 1218.3 | 5 | 3 | 1291.7 | 8 | Details |
| 19 | Overberg Schools - PS Trials Region 3 2024 (U9 Boys) | Rapid | 2024-03-02 | 2024-03-02 | Overberg (WOS) | 5 | 1218.3 | 5 | 3 | 1278.7 | 3.9 | Details |
| 20 | Overberg Open Rapid 2024 (U7+U9) | Rapid | 2024-01-27 | 2024-01-27 | Overberg (WOS) | 5 | 1222.5 | 5 | 2 | 1171.7 | -2.4 | Details |
| 21 | Kingsway Open 2023 (U8) | Rapid | 2023-10-28 | 2023-10-28 | Overberg (WOS) | 5 | 1223.3 | 5 | 2.5 | 1209.1 | -0.4 | Details |
| 22 | Western Cape Top Schools 2023 (U7 Mixed) | Standard | 2023-09-02 | 2023-09-03 | Cape Winelands (WCW) | 5 | 1198.8 | 2 | 2 | 1582.3 | 13.6 | Details |
| 23 | Overberg Top Schools 2023 (U7+U9) | Standard | 2023-08-05 | 2023-08-05 | Overberg (WOS) | 5 | 1200 | 5 | 2.5 | 1186.2 | -0.7 | 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 | 23 |
| Wins | 10 |
| Draws | 0 |
| Losses | 13 |
| White | 12 |
| Black | 11 |
| White wins | 4 |
| Black wins | 6 |
| Score | 10 |
| Percent | 43.5 |
| Dp | -55.4 |
| AOR | 1263.5 |
| Performance | 1208.1 |
Game statistics (History)
| Games | 120 |
| Wins | 50 |
| Draws | 4 |
| Losses | 66 |
| White | 59 |
| Black | 61 |
| White wins | 27 |
| Black wins | 23 |
| Score | 52 |
| Percent | 43.3 |
| Dp | -56.7 |
| AOR | 1251.1 |
| Performance | 1194.4 |
Rankings (Main)
| National | |
| Overall | 11513 |
| Gender | 9131 |
| Age group | 1484 |
| Gender/Age | 1115 |
| Provincial | |
| Overall | 3247 |
| Gender | 2479 |
| Age group | 448 |
| Gender/Age | 317 |
| Regional | |
| Overall | 228 |
| Gender | 155 |
| Age group | 36 |
| Gender/Age | 27 |
Rankings (Standard)
| National | |
| Overall | 10016 |
| Gender | 7761 |
| Age group | 1316 |
| Gender/Age | 963 |
| Provincial | |
| Overall | 2866 |
| Gender | 2101 |
| Age group | 417 |
| Gender/Age | 277 |
| Regional | |
| Overall | 184 |
| Gender | 114 |
| Age group | 31 |
| Gender/Age | 21 |
Rankings (Rapid)
| National | |
| Overall | 4060 |
| Gender | 3209 |
| Age group | 652 |
| Gender/Age | 487 |
| Provincial | |
| Overall | 1587 |
| Gender | 1224 |
| Age group | 266 |
| Gender/Age | 192 |
| Regional | |
| Overall | 222 |
| Gender | 146 |
| Age group | 40 |
| Gender/Age | 29 |
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 | 23 |
| Score | 10 |
| Percent | 43.5 |
| Aor | 1263.5 |
| Dp | -55.4 |
| Prat | 1208.1 |
Performance (12 months)
| Games | 45 |
| Score | 19 |
| Percent | 42.2 |
| Aor | 1272.5 |
| Dp | -66.1 |
| Prat | 1206.4 |
Performance (History)
| Games | 120 |
| Score | 52 |
| Percent | 43.3 |
| Aor | 1251.1 |
| Dp | -56.7 |
| Prat | 1194.4 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Kuhn, D (Dian) | 6 | 4 | 2 | Overberg Open Rapid 2024 (U7+U9) | Curro Hermanus Spring Open 2025 (U9) | Details |
| Overall | 2 | Faasen, C (Charles) | 6 | 3 | 3 | Overberg Top Schools 2023 (U7+U9) | Overberg Schools Open Championship 2026 (U11) | Details |
| Overall | 3 | Du Preez, J (Janco) | 5 | 2 | 3 | Kingsway Open 2023 (U8) | Kingsway Chess Open 2025 (U10) | Details |
| Overall | 4 | Grieb, N (Nathan) | 4 | 3 | 1 | Overberg Schools - PS Trials Region 3 2024 (U9 Boys) | Overberg Schools - PS Closed 2025 (U9 Boys) | Details |
| Overall | 5 | Lingenfelder, S (Stephanus) | 3 | 2 | 1 | Curro Hermanus Summer Open 2025 (U9) | Overberg Schools Primary School Trials (Region 1) 2026 (U11 Boys) | Details |
| Standard | 1 | Wood, J (James) | 2 | 0 | 2 | Overberg Schools - PS Closed 2025 (U9 Boys) | Western Cape Schools Individual Championship 2025 (U9 Boys) | Details |
| Standard | 2 | Buhr, W (Wilhelm) | 2 | 1 | 1 | Overberg Schools - PS Closed 2024 (U9 Boys) | Overberg Schools Primary School Closed 2026 (U11 Boys) | Details |
| Standard | 3 | Bruiners, J (Jeanne) | 2 | 1 | 1 | Western Cape Schools Individual Championship 2025 (U9 Boys) | Western Cape Schools - Top Schools 2025 (U9) | Details |
| Standard | 4 | Du Plessis, E (Eben) | 2 | 2 | 0 | Overberg Schools - Top Schools 2024 (U7+U9 Mixed) | Western Cape Top Schools Championship 2024 (U9 Mixed) | Details |
| Standard | 5 | Lourens, L (Lihan) | 2 | 0 | 2 | Overberg Schools - Top Schools 2024 (U7+U9 Mixed) | Overberg Schools - PS Closed 2025 (U9 Boys) | Details |
| Rapid | 1 | Faasen, C (Charles) | 5 | 3 | 2 | Kingsway Open 2023 (U8) | Overberg Schools Open Championship 2026 (U11) | Details |
| Rapid | 2 | Kuhn, D (Dian) | 5 | 4 | 1 | Overberg Open Rapid 2024 (U7+U9) | Curro Hermanus Spring Open 2025 (U9) | Details |
| Rapid | 3 | Du Preez, J (Janco) | 4 | 2 | 2 | Kingsway Open 2023 (U8) | Kingsway Chess Open 2025 (U10) | Details |
| Rapid | 4 | Otto, X (Xavier) | 3 | 2 | 1 | Overberg Schools - PS Trials Region 3 2024 (U9 Boys) | Overberg Schools Primary School Trials (Region 1) 2026 (U11 Boys) | Details |
| Rapid | 5 | Lingenfelder, S (Stephanus) | 3 | 2 | 1 | Curro Hermanus Summer Open 2025 (U9) | Overberg Schools Primary School Trials (Region 1) 2026 (U11 Boys) | Details |