PLAYER PAGE
Olenka Shai Nelson
2070096496Cape Town (WCT)Personal
Main rating
| Rating | 1280 |
| K-factor | 36 |
| Floor | 850.1 |
| Highest | 1350.1 (2025-09-01) |
| Min/Max +/- allowed | 134 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1251 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1280 |
| K-factor | 36 |
| Floor | 850.1 |
| Highest | 1350.1 (2025-09-01) |
| Min/Max +/- allowed | 133.9 |
Standard rating
| Rating | 1260.3 |
| K-factor | 36 |
| Floor | 790 |
| Highest | 1290 (2025-09-30) |
| Min/Max +/- allowed | 145.9 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1251 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1260.3 |
| K-factor | 36 |
| Floor | 790 |
| Highest | 1290 (2025-09-30) |
| Min/Max +/- allowed | 145.9 |
Rapid rating
| Rating | 1279.9 |
| K-factor | 36 |
| Floor | 779.9 |
| Highest | 1279.9 (2026-01-01) |
| Min/Max +/- allowed | 148 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1153.7 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1279.9 |
| K-factor | 36 |
| Floor | 779.9 |
| Highest | 1279.9 (2026-01-01) |
| Min/Max +/- allowed | 148 |
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 | South African Open Championship 2026 (Intermediate) | Classical | 2026-06-28 | 2026-07-05 | Cape Town (WCT) | 9 | 1310.4 | 9 | 4 | 1226.3 | -30.4 | Details |
| 2 | CTCF Open Championship 2026 (Intermediate) | Classical | 2026-06-13 | 2026-06-14 | Cape Town (WCT) | 6 | 1225.7 | 6 | 3.5 | 1549.8 | 84.7 | Details |
| 3 | Four Seasons Chess Club Autumn Slam 2026 (Intermediate) | Rapid | 2026-05-16 | 2026-05-16 | Cape Town (WCT) | 6 | 1225.7 | 0 | 0 | 500 | 0 | Details |
| 4 | South African Junior Closed Chess Championship 2026 (U20 Girls) | Classical | 2026-03-28 | 2026-04-02 | Bojanala Platina (NBR) | 9 | 1182.8 | 8 | 3.5 | 1311.5 | 43 | Details |
| 5 | Steinitz Chess Festival 2026 (Intermediate) | Standard | 2026-03-21 | 2026-03-22 | Cape Town (WCT) | 6 | 1237.2 | 5 | 1 | 935.8 | -54.4 | Details |
| 6 | COGH 2026 (Intermediate) | Standard | 2026-01-31 | 2026-02-01 | Cape Town (WCT) | 6 | 1233.8 | 6 | 3 | 1249.6 | 1 | Details |
| 7 | Helderberg Chess Club Open 2026 (B) | Standard | 2026-01-17 | 2026-01-17 | Cape Town (WCT) | 5 | 1229.5 | 5 | 2 | 1248 | 0.7 | Details |
| 8 | Four Seasons Summer Slam 2025 (Open) | Rapid | 2025-12-10 | 2025-12-10 | Cape Town (WCT) | 6 | 1272.1 | 6 | 4 | 1372.7 | 6.7 | Details |
| 9 | 2025 Mzansi Inter Provincial Team Championships (U20 Girls) | Standard | 2025-12-15 | 2025-12-17 | Nelson Mandela Bay (ENM) | 6 | 1272.1 | 6 | 2 | 1326.9 | 6.1 | Details |
| 10 | Kraaifontein Open 2025 (Intermediate) | Standard | 2025-12-06 | 2025-12-07 | Cape Town (WCT) | 6 | 1272.1 | 5 | 1 | 920.8 | -36.5 | Details |
| 11 | UCT Open Chess Championship 2025 (Intermediate) | Standard | 2025-10-11 | 2025-10-12 | Cape Town (WCT) | 6 | 1345.2 | 5 | 1 | 939.9 | -40.5 | Details |
| 12 | Western Cape Schools - Top Schools 2025 (U19 Girls) | Standard | 2025-09-06 | 2025-09-07 | Overberg (WOS) | 6 | 1350.1 | 6 | 4 | 1324.9 | -2.8 | Details |
| 13 | CT Metro District East Top Schools Chess 2025 (U15-U19 Girls) | Standard | 2025-08-02 | 2025-08-03 | Cape Town (WCT) | 6 | 1330.9 | 6 | 4.5 | 1420.7 | 10.6 | Details |
| 14 | 4th Curro Durbanville Rapid Open 2025 (Intermediate) | Rapid | 2025-07-19 | 2025-07-19 | Cape Town (WCT) | 7 | 1333.5 | 7 | 4 | 1309.3 | -1.4 | Details |
| 15 | Cape Winelands Queens 2025 (Open) | Rapid | 2025-06-21 | 2025-06-21 | Cape Winelands (WCW) | 6 | 1124 | 6 | 4 | 1531 | 31 | Details |
| 16 | Cape Town Chess Junior League 2025 (U18) | Standard | 2025-05-10 | 2025-05-31 | Cape Town (WCT) | 6 | 1124 | 2 | 1.5 | 1542.7 | 14.9 | Details |
| 17 | Cape Town Open Chess Festival 2025 (C) | Standard | 2025-03-22 | 2025-03-23 | Cape Town (WCT) | 6 | 1118.8 | 6 | 2 | 1164.8 | 5.8 | Details |
| 18 | Western Cape Closed 2025 (C) | Standard | 2025-03-08 | 2025-03-09 | Cape Town (WCT) | 6 | 1118.8 | 6 | 2.5 | 1189.1 | 9.2 | Details |
| 19 | CT Metro Schools Individual Closed 2025 (U19 Girls) | Standard | 2025-03-01 | 2025-03-02 | Cape Town (WCT) | 6 | 1118.8 | 6 | 1 | 1032 | -12.1 | Details |
| 20 | CT Metro District East Schools Chess Individuals Trials 2025 (U18+U20 Girls) | Standard | 2025-02-01 | 2025-02-02 | Cape Town (WCT) | 6 | 1101.1 | 6 | 2.5 | 1198.8 | 9.8 | Details |
| 21 | Cape Town Junior League Finals 2024 (U18 Open A) | Rapid | 2024-05-18 | 2024-05-18 | Cape Town (WCT) | 5 | 1120.4 | 5 | 0 | 861.8 | -17.2 | Details |
| 22 | Cape Town Junior League Qualifier 2024 (U18 Open) | Rapid | 2024-04-06 | 2024-04-06 | Cape Town (WCT) | 6 | 1102.3 | 4 | 2 | 1300.5 | 9.1 | Details |
| 23 | Cape Town Open Chess Championship 2024 (Beginner) | Standard | 2024-03-16 | 2024-03-17 | Cape Town (WCT) | 6 | 1127 | 6 | 2 | 1026.1 | -12.4 | Details |
| 24 | Cape Town Open 2023 (Intermediate) | Standard | 2023-03-25 | 2023-03-26 | Cape Town (WCT) | 6 | 1145.4 | 5 | 1 | 1051.8 | -9.1 | Details |
| 25 | Stellenbosch Primary 2018 (U12) | Rapid | 2018-09-15 | 2018-09-15 | Cape Winelands (WCW) | 7 | 1118.3 | 6 | 4 | 1279 | 13.7 | Details |
| 26 | District East Schools Chess Open Trials 2018 (U11) | Standard | 2018-02-02 | 2018-02-03 | Cape Town (WCT) | 6 | 1200 | 5 | 1 | 665 | -40.7 | 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 | 39 |
| Wins | 16 |
| Draws | 2 |
| Losses | 21 |
| White | 17 |
| Black | 22 |
| White wins | 7 |
| Black wins | 9 |
| Score | 17 |
| Percent | 43.6 |
| Dp | -54.5 |
| AOR | 1317.2 |
| Performance | 1262.7 |
Game statistics (History)
| Games | 143 |
| Wins | 58 |
| Draws | 6 |
| Losses | 79 |
| White | 72 |
| Black | 71 |
| White wins | 32 |
| Black wins | 26 |
| Score | 61 |
| Percent | 42.7 |
| Dp | -62.4 |
| AOR | 1265.8 |
| Performance | 1203.4 |
Rankings (Main)
| National | |
| Overall | 7086 |
| Gender | 1327 |
| Age group | 809 |
| Gender/Age | 127 |
| Provincial | |
| Overall | 2074 |
| Gender | 471 |
| Age group | 227 |
| Gender/Age | 43 |
| Regional | |
| Overall | 896 |
| Gender | 165 |
| Age group | 98 |
| Gender/Age | 23 |
Rankings (Standard)
| National | |
| Overall | 6903 |
| Gender | 1401 |
| Age group | 774 |
| Gender/Age | 128 |
| Provincial | |
| Overall | 1964 |
| Gender | 486 |
| Age group | 222 |
| Gender/Age | 45 |
| Regional | |
| Overall | 863 |
| Gender | 178 |
| Age group | 96 |
| Gender/Age | 24 |
Rankings (Rapid)
| National | |
| Overall | 2514 |
| Gender | 463 |
| Age group | 192 |
| Gender/Age | 20 |
| Provincial | |
| Overall | 1006 |
| Gender | 210 |
| Age group | 70 |
| Gender/Age | 7 |
| Regional | |
| Overall | 392 |
| Gender | 51 |
| Age group | 28 |
| 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 | 0 |
| Score | 0 |
| Percent | 0 |
| Aor | 0 |
| Dp | 0 |
| Prat | 0 |
Performance ()
| Games | 39 |
| Score | 17 |
| Percent | 43.6 |
| Aor | 1317.2 |
| Dp | -54.5 |
| Prat | 1262.7 |
Performance (12 months)
| Games | 61 |
| Score | 25 |
| Percent | 41 |
| Aor | 1302 |
| Dp | -76.6 |
| Prat | 1225.3 |
Performance (History)
| Games | 143 |
| Score | 61 |
| Percent | 42.7 |
| Aor | 1265.8 |
| Dp | -62.4 |
| Prat | 1203.4 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Smit, M (Mario) | 3 | 3 | 0 | Cape Town Open Chess Festival 2025 (C) | COGH 2026 (Intermediate) | Details |
| Overall | 2 | Thorpe, C (Claire) | 2 | 1 | 1 | Cape Winelands Queens 2025 (Open) | Western Cape Schools - Top Schools 2025 (U19 Girls) | Details |
| Overall | 3 | Mutumbi, M (Melisa) | 2 | 1 | 1 | CT Metro District East Top Schools Chess 2025 (U15-U19 Girls) | CT Metro District East Top Schools Chess 2025 (U15-U19 Girls) | Details |
| Overall | 4 | De La Rey, C (Callum) | 2 | 2 | 0 | Steinitz Chess Festival 2026 (Intermediate) | South African Open Championship 2026 (Intermediate) | Details |
| Overall | 5 | Kuyler, L (Luzandri) | 2 | 1 | 1 | 2025 Mzansi Inter Provincial Team Championships (U20 Girls) | 2025 Mzansi Inter Provincial Team Championships (U20 Girls) | Details |
| Standard | 1 | Netshimbupfe, W (Wanga) | 2 | 1 | 1 | 2025 Mzansi Inter Provincial Team Championships (U20 Girls) | 2025 Mzansi Inter Provincial Team Championships (U20 Girls) | Details |
| Standard | 2 | Fortuin, S (Sharonique) | 2 | 1 | 1 | CT Metro District East Top Schools Chess 2025 (U15-U19 Girls) | CT Metro District East Top Schools Chess 2025 (U15-U19 Girls) | Details |
| Standard | 3 | De La Rey, C (Callum) | 2 | 2 | 0 | Steinitz Chess Festival 2026 (Intermediate) | South African Open Championship 2026 (Intermediate) | Details |
| Standard | 4 | Menqe, S (Sinesipho) | 2 | 1 | 1 | CT Metro District East Top Schools Chess 2025 (U15-U19 Girls) | CT Metro District East Top Schools Chess 2025 (U15-U19 Girls) | Details |
| Standard | 5 | Shordries, N (Nkiyasi) | 2 | 1 | 1 | 2025 Mzansi Inter Provincial Team Championships (U20 Girls) | 2025 Mzansi Inter Provincial Team Championships (U20 Girls) | Details |
| Rapid | 1 | Kruger, D (Daniel) | 2 | 2 | 0 | Cape Town Junior League Qualifier 2024 (U18 Open) | Cape Town Junior League Finals 2024 (U18 Open A) | Details |