PLAYER PAGE
Personal
Groenewald, C (Calvin)
Chess SA id
1090151521FIDE id
?Date of birth
2009-10-28 (U18)Gender
MaleRegion
Tshwane (GTP)Citizen
RSATitles
Chess SA registered
NoLast active game
2025-08-16Personal details last changed
1900-01-01Junior GPX Games
Junior GPX Points
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| Rating | 1050.5 | 1041.4 | 1200 | 1200 |
| Raw rating | 1050.5 | 1041.4 | 1200 | 1200 |
| Weighted rating | 1033.3 | 1019.1 | 1200 | 1200 |
| Weighted performance | 845.2 | 843.6 | 0 | 0 |
| Floor | 700 | 700 | 700 | 700 |
| K-factor | 36 | 36 | 36 | 36 |
| Min/Max rating change allowed | 205.2 | 207.9 | 165.8 | 165.8 |
| Highest rating | 12002018-10-01 | 12002018-10-01 | 12002018-10-01 | 12002018-10-01 |
| Highest raw rating | 12002019-12-01 | 12002019-12-01 | 12002024-03-01 | 12002024-03-01 |
| Highest weighted rating | 12002018-10-01 | 12002018-10-01 | 12002018-10-01 | 12002018-10-01 |
| Highest weighted performance | 12002019-12-01 | 12002019-12-01 | 12002024-03-01 | 12002024-03-01 |
| Prediction | ||||
|---|---|---|---|---|
| Item | Main | Standard | Rapid | Blitz |
| Rating change | 0 | 0 | 0 | 0 |
| New rating | 1050.5 | 1041.4 | 1200 | 1200 |
| Analysis | ||||
| Rating | 1050.5 | 1041.4 | 1200 | 1200 |
| Raw rating | 1050.5 | 1041.4 | 1200 | 1200 |
| Weighted rating | 1033.3 | 1019.1 | 1200 | |
| Weighted performance | 845.2 | 843.6 | 0 | |
| K-factor | 36 | 36 | 36 | 36 |
| Floor | 700 | 700 | 700 | 700 |
| Max/Min rating change allowed | 205.2 | 207.9 | 165.8 | 165.8 |
| Games | 0 | 0 | 0 | 0 |
| Score | 0 | 0 | 0 | 0 |
| Expected score | 0 | 0 | 0 | 0 |
| Score-Expected | 0 | 0 | 0 | 0 |
| Temp raw +/- | 0 | 0 | 0 | 0 |
| Final raw +/- | 0 | 0 | 0 | 0 |
| New raw rating | 1050.5 | 1041.4 | 1200 | 1200 |
| New weighted rating | 1035 | 1021.4 | 1200 | 1200 |
| New weighted performance | 839.4 | 837.8 | 0 | 0 |
| Temp new rating | 1050.5 | 1041.4 | 1200 | 1200 |
| Temp new rating +/- | 0 | 0 | 0 | 0 |
| Final new rating +/- | 0 | 0 | 0 | 0 |
| New rating | 1050.5 | 1041.4 | 1200 | 1200 |
| New K-factor | 36 | 36 | 36 | 36 |
| New floor | 700 | 700 | 700 | 700 |
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | |
| 5 | 5 | 0 | 0 | |
| 10 | 10 | 0 | 0 | |
| 22 | 22 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| History | 37 | 37 | 0 | 0 |
| Games since | |||||||||||||||||
| Main15 | Standard15 | Rapid0 | Blitz0 | ||||||||||||||
| Gender | Male | ||||||||||||||||
| Age group | U18 | ||||||||||||||||
| Region | Tshwane (GTP) | ||||||||||||||||
| Province | Gauteng (GT) | ||||||||||||||||
| Main | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Standard | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Rapid | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Blitz | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U18 | -1 | -1 | -1 | ||||||||||||||
| U18 Male | -1 | -1 | -1 | ||||||||||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 0 | 0 | 0 | 0 | 0 | 0 |
| Standard | 0 | 0 | 0 | 0 | 0 | 0 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 5 | 2 | 40 | -85 | 1233.4 | 1148.4 |
| Standard | 5 | 2 | 40 | -85 | 1233.4 | 1148.4 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| History | ||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 37 | 8.5 | 22.97 | -229.7 | 1212.7 | 982.9 |
| Standard | 37 | 8.5 | 22.97 | -229.7 | 1212.7 | 982.9 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Date | Main | Standard | Rapid | Blitz |
| 2025-11-01 | 1050.5 | 1041.4 | 1200 | 1200 |
| 2025-09-30 | 1050.5 | 1041.4 | 1200 | 1200 |
| 2025-09-01 | 1050.5 | 1041.4 | 1200 | 1200 |
| 2025-08-01 | 1028.4 | 1014.1 | 1200 | 1200 |
| 2025-07-01 | 1028.4 | 1014.1 | 1200 | 1200 |
| 2025-06-01 | 1028.4 | 1014.1 | 1200 | 1200 |
| 2025-05-01 | 1028.6 | 1012.1 | 1200 | 1200 |
| 2025-04-01 | 1028.6 | 1012.1 | 1200 | 1200 |
| 2025-03-01 | 1028.6 | 1012.1 | 1200 | 1200 |
| 2025-02-01 | 1028.6 | 1012.1 | 1200 | 1200 |
| 2025-01-01 | 1026 | 1012.1 | 1200 | 1200 |
| 2024-12-01 | 1026 | 1012.1 | 1200 | 1200 |
| 2024-11-01 | 1026 | 1012.1 | 1200 | 1200 |
| 2024-10-01 | 1026 | 1012.1 | 1200 | 1200 |
| 2024-09-01 | 1026 | 1012.1 | 1200 | 1200 |
| 2024-08-01 | 1040.3 | 1026.4 | 1200 | 1200 |
| 2024-07-01 | 1040.3 | 1026.4 | 1200 | 1200 |
| 2024-09-01 | 1040.3 | 1026.4 | 1200 | 1200 |
| 2024-05-01 | 1018.1 | 994.4 | 1200 | 1200 |
| 2024-04-01 | 1018.1 | 994.4 | 1200 | 1200 |
| 2024-03-01 | 1018.1 | 994.4 | 1200 | 1200 |
| 2024-02-01 | 1018.1 | 994.4 | 1200 | 1200 |
| 2024-01-01 | 1018.1 | 994.4 | 1200 | 1200 |
| 2023-12-01 | 1018.1 | 994.4 | 1200 | 1200 |
Comming soon.
Tournaments
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2025 Gauteng North School District CLOSED League Finals - D1 (U17) | 2025-08-16 | 2025-08-16 | Standard | Tshwane (GTP) | 3 | 1 | 1 | Yes | Analysis |
| 2 | 2025 Gauteng North School Individual Championships D1 (U18 Open) | 2025-05-17 | 2025-05-17 | Standard | Tshwane (GTP) | 5 | 4 | 1 | Yes | Analysis |
Last 500 tournaments since 01 January 2018
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2025 Gauteng North School District CLOSED League Finals - D1 (U17) | 2025-08-16 | 2025-08-16 | Standard | Tshwane (GTP) | 3 | 1 | 1 | Yes | Analysis |
| 2 | 2025 Gauteng North School Individual Championships D1 (U18 Open) | 2025-05-17 | 2025-05-17 | Standard | Tshwane (GTP) | 5 | 4 | 1 | Yes | Analysis |
| 3 | D1 Gauteng North District School Closed 2024 (U15) | 2024-08-03 | 2024-08-03 | Standard | Tshwane (GTP) | 5 | 5 | 1 | Yes | Analysis |
| 4 | 2024 Gauteng North School District Individual Championships - D1 (U15 Boys) | 2024-05-11 | 2024-05-11 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 5 | 2023 Gauteng Top Schools (U15 Mixed) | 2023-08-19 | 2023-08-19 | Standard | West Rand (GWR) | 5 | 5 | 0 | Yes | Analysis |
| 6 | 2023 Gauteng North School District CLOSED League Championships (D1) | 2023-08-05 | 2023-08-05 | Standard | Tshwane (GTP) | 3 | 3 | 1 | Yes | Analysis |
| 7 | 2023 Gauteng North School District CLOSED Individual Championships (U15 Boys) | 2023-05-13 | 2023-05-13 | Standard | Tshwane (GTP) | 5 | 4 | 1 | Yes | Analysis |
| 8 | Silver Lakes Open Chess Tournament (C) | 2023-04-15 | 2023-04-15 | Standard | Tshwane (GTP) | 5 | 5 | 0 | Yes | Analysis |
| 9 | Chris Greyling Open Tournament 2023 (D2) | 2023-03-21 | 2023-03-21 | Standard | Tshwane (GTP) | 5 | 5 | 1.5 | Yes | Analysis |
Top 3 Streaks
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | Tournament2025 Gauteng North School Individual Championships D1 | Tournament2025 Gauteng North School District CLOSED League Finals - D1 | ||||||
| date2025-05-17 | rnd5 | typeStandard | result1 | date2025-08-16 | rnd2 | typeStandard | result1 | ||
| OpponentNtshakaza, H (Hlomla) | OpponentMorumudi, R (Reatlegile Mpelegeng) | ||||||||
| 2 | 2 | Tournament2024 Gauteng North School District Individual Championships - D1 | Tournament2024 Gauteng North School District Individual Championships - D1 | ||||||
| date2024-05-11 | rnd2 | typeStandard | result1 | date2024-05-11 | rnd3 | typeStandard | result1 | ||
| OpponentMonyane, K (Kutlwano) | OpponentSehlaha, B (Blessing) | ||||||||
| 3 | 2 | TournamentChris Greyling Open Tournament 2023 | TournamentChris Greyling Open Tournament 2023 | ||||||
| date2023-03-21 | rnd3 | typeStandard | result0.5 | date2023-03-21 | rnd4 | typeStandard | result1 | ||
| OpponentDe Klerk, W (Wihan) | OpponentVan Niekerk, Z (Zani) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | Tournament2025 Gauteng North School Individual Championships D1 | Tournament2025 Gauteng North School District CLOSED League Finals - D1 | ||||||
| date2025-05-17 | rnd5 | typeStandard | result1 | date2025-08-16 | rnd2 | typeStandard | result1 | ||
| OpponentNtshakaza, H (Hlomla) | OpponentMorumudi, R (Reatlegile Mpelegeng) | ||||||||
| 2 | 2 | Tournament2024 Gauteng North School District Individual Championships - D1 | Tournament2024 Gauteng North School District Individual Championships - D1 | ||||||
| date2024-05-11 | rnd2 | typeStandard | result1 | date2024-05-11 | rnd3 | typeStandard | result1 | ||
| OpponentMonyane, K (Kutlwano) | OpponentSehlaha, B (Blessing) | ||||||||
| 3 | 2 | TournamentChris Greyling Open Tournament 2023 | TournamentChris Greyling Open Tournament 2023 | ||||||
| date2023-03-21 | rnd3 | typeStandard | result0.5 | date2023-03-21 | rnd4 | typeStandard | result1 | ||
| OpponentDe Klerk, W (Wihan) | OpponentVan Niekerk, Z (Zani) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | Tournament2025 Gauteng North School Individual Championships D1 | Tournament2025 Gauteng North School District CLOSED League Finals - D1 | ||||||
| date2025-05-17 | rnd5 | typeStandard | result1 | date2025-08-16 | rnd2 | typeStandard | result1 | ||
| OpponentNtshakaza, H (Hlomla) | OpponentMorumudi, R (Reatlegile Mpelegeng) | ||||||||
| 2 | 2 | Tournament2024 Gauteng North School District Individual Championships - D1 | Tournament2024 Gauteng North School District Individual Championships - D1 | ||||||
| date2024-05-11 | rnd2 | typeStandard | result1 | date2024-05-11 | rnd3 | typeStandard | result1 | ||
| OpponentMonyane, K (Kutlwano) | OpponentSehlaha, B (Blessing) | ||||||||
| 3 | 1 | TournamentD1 Gauteng North District School Closed 2024 | TournamentD1 Gauteng North District School Closed 2024 | ||||||
| date2024-08-03 | rnd2 | typeStandard | result1 | date2024-08-03 | rnd2 | typeStandard | result1 | ||
| OpponentDlamini, P (Palesa) | OpponentDlamini, P (Palesa) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | Tournament2025 Gauteng North School Individual Championships D1 | Tournament2025 Gauteng North School District CLOSED League Finals - D1 | ||||||
| date2025-05-17 | rnd5 | typeStandard | result1 | date2025-08-16 | rnd2 | typeStandard | result1 | ||
| OpponentNtshakaza, H (Hlomla) | OpponentMorumudi, R (Reatlegile Mpelegeng) | ||||||||
| 2 | 2 | Tournament2024 Gauteng North School District Individual Championships - D1 | Tournament2024 Gauteng North School District Individual Championships - D1 | ||||||
| date2024-05-11 | rnd2 | typeStandard | result1 | date2024-05-11 | rnd3 | typeStandard | result1 | ||
| OpponentMonyane, K (Kutlwano) | OpponentSehlaha, B (Blessing) | ||||||||
| 3 | 1 | TournamentD1 Gauteng North District School Closed 2024 | TournamentD1 Gauteng North District School Closed 2024 | ||||||
| date2024-08-03 | rnd2 | typeStandard | result1 | date2024-08-03 | rnd2 | typeStandard | result1 | ||
| OpponentDlamini, P (Palesa) | OpponentDlamini, P (Palesa) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
Top 10 opponents most often played
| # | Opponent | Main | Standard | Rapid | Blitz | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gms | Score | Dp | Gms | Score | Dp | Gms | Score | Dp | Gms | Score | Dp | ||
| Aor | Prat | Aor | Prat | Aor | Prat | Aor | Prat | ||||||
| 1 | Sithole ,N (Nkosinathi) | 2 | 0 | -425 | 2 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1291.3 | 866.3 | 1280.3 | 866.3 | 0 | 0 | 0 | 0 | ||||||
| 2 | Modiba ,K (Kamogelo) | 2 | 0 | -425 | 2 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1234.7 | 809.7 | 1241.4 | 809.7 | 0 | 0 | 0 | 0 | ||||||
| 3 | Sehlaha ,B (Blessing) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 1625 | 1200 | 1625 | 0 | 0 | 0 | 0 | ||||||
| 4 | Mahlangu ,J (Junior) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 1625 | 1200 | 1625 | 0 | 0 | 0 | 0 | ||||||
| 5 | Venter ,E (Elke) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1207.3 | 782.3 | 1200.2 | 782.3 | 0 | 0 | 0 | 0 | ||||||
| 6 | Fandisi ,S (Siyabonga) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 775 | 1200 | 775 | 0 | 0 | 0 | 0 | ||||||
| 7 | De Klerk ,W (Wihan) | 1 | 0.5 | 0 | 1 | 0.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1038 | 1038 | 1033.6 | 1038 | 0 | 0 | 0 | 0 | ||||||
| 8 | Monyane ,K (Kutlwano) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 1625 | 1200 | 1625 | 0 | 0 | 0 | 0 | ||||||
| 9 | Rapotu ,V (Vuyani) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1172.2 | 747.2 | 1165.7 | 747.2 | 0 | 0 | 0 | 0 | ||||||
| 10 | Fraser ,J (Jacobus) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1164.6 | 739.6 | 1162.8 | 739.6 | 0 | 0 | 0 | 0 | ||||||
Norms
| # | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
|---|---|---|---|---|---|---|---|---|