PLAYER PAGE
Personal
Vorster, J (James)
Chess SA id
1150149187FIDE id
?Date of birth
2015-11-26 (U12)Gender
MaleRegion
Tshwane (GTP)Citizen
RSATitles
Chess SA registered
YesLast active game
2025-12-07Personal details last changed
1900-01-01Junior GPX Games
Junior GPX Points
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| Rating | 1331.7 | 1327.3 | 1200 | 1200 |
| Raw rating | 1318.8 | 1324.8 | 1200 | 1200 |
| Weighted rating | 1229.6 | 1230.7 | 1200 | 1200 |
| Weighted performance | 1331.7 | 1327.3 | 0 | 0 |
| Floor | 818.8 | 824.8 | 700 | 700 |
| K-factor | 36 | 36 | 36 | 36 |
| Min/Max rating change allowed | 140 | 138.8 | 165.8 | 165.8 |
| Highest rating | 1331.72026-01-01 | 1327.32026-01-01 | 12002018-10-01 | 12002018-10-01 |
| Highest raw rating | 1318.82026-01-01 | 1324.82026-01-01 | 12002024-03-01 | 12002024-03-01 |
| Highest weighted rating | 1229.62026-01-01 | 1230.72026-01-01 | 12002018-10-01 | 12002018-10-01 |
| Highest weighted performance | 1331.72026-01-01 | 1327.32026-01-01 | 12002024-03-01 | 12002024-03-01 |
| Prediction | ||||
|---|---|---|---|---|
| Item | Main | Standard | Rapid | Blitz |
| Rating change | -9 | -2.5 | 0 | 0 |
| New rating | 1322.8 | 1324.8 | 1200 | 1200 |
| Analysis | ||||
| Rating | 1331.7 | 1327.3 | 1200 | 1200 |
| Raw rating | 1318.8 | 1324.8 | 1200 | 1200 |
| Weighted rating | 1229.6 | 1230.7 | 1200 | |
| Weighted performance | 1331.7 | 1327.3 | 0 | |
| K-factor | 36 | 36 | 36 | 36 |
| Floor | 818.8 | 824.8 | 700 | 700 |
| Max/Min rating change allowed | 140 | 138.8 | 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 | 1318.8 | 1324.8 | 1200 | 1200 |
| New weighted rating | 1238.8 | 1240.4 | 1200 | 1200 |
| New weighted performance | 1322.8 | 1318.4 | 0 | 0 |
| Temp new rating | 1322.8 | 1324.8 | 1200 | 1200 |
| Temp new rating +/- | -9 | -2.5 | 0 | 0 |
| Final new rating +/- | -9 | -2.5 | 0 | 0 |
| New rating | 1322.8 | 1324.8 | 1200 | 1200 |
| New K-factor | 36 | 36 | 36 | 36 |
| New floor | 818.8 | 824.8 | 700 | 700 |
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | |
| 41 | 41 | 0 | 0 | |
| 20 | 20 | 0 | 0 | |
| 36 | 36 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| History | 97 | 97 | 0 | 0 |
| Games since | |||||||||||||||||
| Main61 | Standard61 | Rapid0 | Blitz0 | ||||||||||||||
| Gender | Male | ||||||||||||||||
| Age group | U12 | ||||||||||||||||
| Region | Tshwane (GTP) | ||||||||||||||||
| Province | Gauteng (GT) | ||||||||||||||||
| Main | RSA | Province | Region | ||||||||||||||
| Overall | 3562 | 1180 | 411 | ||||||||||||||
| Male | 2744 | 908 | 315 | ||||||||||||||
| U12 | 557 | 187 | 67 | ||||||||||||||
| U12 Male | 391 | 132 | 42 | ||||||||||||||
| Standard | RSA | Province | Region | ||||||||||||||
| Overall | 3407 | 1229 | 466 | ||||||||||||||
| Male | 2641 | 960 | 358 | ||||||||||||||
| U12 | 511 | 197 | 77 | ||||||||||||||
| U12 Male | 366 | 142 | 50 | ||||||||||||||
| Rapid | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U12 | -1 | -1 | -1 | ||||||||||||||
| U12 Male | -1 | -1 | -1 | ||||||||||||||
| Blitz | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Male | -1 | -1 | -1 | ||||||||||||||
| U12 | -1 | -1 | -1 | ||||||||||||||
| U12 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 | 41 | 18 | 43.9 | -51.8 | 1328.7 | 1276.9 |
| Standard | 41 | 18 | 43.9 | -51.8 | 1328.7 | 1276.9 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| History | ||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 97 | 42 | 43.3 | -57 | 1264.1 | 1207.1 |
| Standard | 97 | 42 | 43.3 | -57 | 1264.1 | 1207.1 |
| Rapid | 0 | 0 | 0 | 0 | 0 | 0 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Date | Main | Standard | Rapid | Blitz |
| 2026-01-01 | 1318.8 | 1324.8 | 1200 | 1200 |
| 2025-11-30 | 1270.1 | 1275.1 | 1200 | 1200 |
| 2025-11-01 | 1270.1 | 1275.1 | 1200 | 1200 |
| 2025-09-30 | 1270.1 | 1275.1 | 1200 | 1200 |
| 2025-09-01 | 1270.1 | 1275.1 | 1200 | 1200 |
| 2025-08-01 | 1230.8 | 1232.1 | 1200 | 1200 |
| 2025-07-01 | 1219.9 | 1220.9 | 1200 | 1200 |
| 2025-06-01 | 1217.5 | 1218.4 | 1200 | 1200 |
| 2025-05-01 | 1214.8 | 1217.1 | 1200 | 1200 |
| 2025-04-01 | 1214.8 | 1217.1 | 1200 | 1200 |
| 2025-03-01 | 1204.5 | 1206.8 | 1200 | 1200 |
| 2025-02-01 | 1184.9 | 1181.1 | 1200 | 1200 |
| 2025-01-01 | 1184.9 | 1181.1 | 1200 | 1200 |
| 2024-12-01 | 1184.9 | 1181.1 | 1200 | 1200 |
| 2024-11-01 | 1184.9 | 1181.1 | 1200 | 1200 |
| 2024-10-01 | 1184.9 | 1181.1 | 1200 | 1200 |
| 2024-09-01 | 1184.9 | 1181.1 | 1200 | 1200 |
| 2024-11-01 | 1184.9 | 1181.1 | 1200 | 1200 |
| 2024-07-01 | 1184.9 | 1181.1 | 1200 | 1200 |
| 2024-06-01 | 1173.8 | 1166 | 1200 | 1200 |
| 2024-05-01 | 1173.8 | 1166 | 1200 | 1200 |
| 2024-04-01 | 1173.8 | 1166 | 1200 | 1200 |
| 2024-03-01 | 1103.4 | 1088.2 | 1200 | 1200 |
| 2024-02-01 | 1103.4 | 1088.2 | 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 |
|---|
Last 500 tournaments since 01 January 2018
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Gauteng Inter-Region at Emerald Resort 2025 (U12 Candidates) | 2025-12-06 | 2025-12-07 | Standard | Sedibeng (GSV) | 5 | 4 | 3 | Yes | Analysis |
| 2 | 2025 Midstream Open Chess Tournament (U12) | 2025-08-25 | 2025-08-25 | Standard | Tshwane (GTP) | 5 | 4 | 1 | Yes | Analysis |
| 3 | 2025 Tshwane South School District CLOSED League Championship (U11A) | 2025-08-15 | 2025-08-15 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 4 | 2025 Etienne Lewis Closed Chess Tournament (U12) | 2025-08-08 | 2025-08-10 | Standard | Tshwane (GTP) | 7 | 7 | 3 | Yes | Analysis |
| 5 | 2025 Wynie Robbertse Chess Tournament (U12) | 2025-07-19 | 2025-07-19 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 6 | 2025 JMCA Open Chess Tournament (U12) | 2025-06-07 | 2025-06-07 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 7 | 2025 Tshwane South School District Individual Finals (D4) (U11 Boys) | 2025-05-10 | 2025-05-10 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 8 | Lubowski Open 2025 (D2) | 2025-03-21 | 2025-03-22 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 9 | Constantiapark Open 2025 (U12) | 2025-02-15 | 2025-02-15 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 10 | 2024 Johannes Mabusela's 40th Birthday Chess Tournament F Section (D) | 2024-06-01 | 2024-06-01 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 11 | 2024 Lubowski Open Chess Tournament (D2) | 2024-03-23 | 2024-03-24 | Standard | Tshwane (GTP) | 5 | 5 | 4 | Yes | Analysis |
| 12 | 2024 Tshwane Chess OPEN Registration Tournament (D1) | 2024-01-27 | 2024-01-27 | Standard | Tshwane (GTP) | 5 | 5 | 1 | Yes | Analysis |
| 13 | 2024 Gauteng Inter-Region Chess Championship (U12C) | 2024-01-13 | 2024-01-14 | Standard | Tshwane (GTP) | 5 | 5 | 1 | Yes | Analysis |
| 14 | 2023 Alekhine Open Tournament (E+F) | 2023-09-09 | 2023-09-09 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 15 | 2023 Woman's Day Open Chess Tournament (Bishop) | 2023-08-09 | 2023-08-09 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 16 | 2023 Jacaranda Round Robin (K) | 2023-08-12 | 2023-08-12 | Standard | Tshwane (GTP) | 7 | 6 | 2 | Yes | Analysis |
| 17 | 2023 Etienne Lewis Closed Tournament (U10) | 2023-08-25 | 2023-08-27 | Standard | Tshwane (GTP) | 7 | 6 | 2.5 | Yes | Analysis |
| 18 | 2023 Milos Ristic Open Tournament (E) | 2023-04-27 | 2023-04-27 | Standard | Tshwane (GTP) | 5 | 5 | 1.5 | Yes | Analysis |
| 19 | 2023 Afrikaans Hoër Seunskool Open Chess Tournament (E) | 2023-03-04 | 2023-03-04 | Standard | Tshwane (GTP) | 5 | 5 | 2 | Yes | Analysis |
| 20 | Laerskool Constantiapark Open Chess Tournament 2023 (U10) | 2023-02-18 | 2023-02-18 | Standard | Tshwane (GTP) | 5 | 4 | 2 | Yes | Analysis |
Top 3 Streaks
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 3 | Tournament2025 Etienne Lewis Closed Chess Tournament | Tournament2025 Tshwane South School District CLOSED League Championship | ||||||
| date2025-08-10 | rnd6 | typeStandard | result1 | date2025-08-15 | rnd1 | typeStandard | result1 | ||
| OpponentLeshabane, L (Lesego) | OpponentChidi, M (Mohau) | ||||||||
| 2 | 3 | TournamentConstantiapark Open 2025 | TournamentConstantiapark Open 2025 | ||||||
| date2025-02-15 | rnd3 | typeStandard | result1 | date2025-02-15 | rnd5 | typeStandard | result1 | ||
| OpponentBarnes, D (Derek) | OpponentDe Beer, L (Lily) | ||||||||
| 3 | 3 | Tournament2023 Milos Ristic Open Tournament | Tournament2023 Milos Ristic Open Tournament | ||||||
| date2023-04-27 | rnd1 | typeStandard | result0.5 | date2023-04-27 | rnd3 | typeStandard | result0.5 | ||
| OpponentOttermann, A (Ayla) | OpponentDanzfuss, E (Edrich) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 3 | Tournament2025 Etienne Lewis Closed Chess Tournament | Tournament2025 Tshwane South School District CLOSED League Championship | ||||||
| date2025-08-10 | rnd6 | typeStandard | result1 | date2025-08-15 | rnd1 | typeStandard | result1 | ||
| OpponentLeshabane, L (Lesego) | OpponentChidi, M (Mohau) | ||||||||
| 2 | 3 | TournamentConstantiapark Open 2025 | TournamentConstantiapark Open 2025 | ||||||
| date2025-02-15 | rnd3 | typeStandard | result1 | date2025-02-15 | rnd5 | typeStandard | result1 | ||
| OpponentBarnes, D (Derek) | OpponentDe Beer, L (Lily) | ||||||||
| 3 | 3 | Tournament2023 Milos Ristic Open Tournament | Tournament2023 Milos Ristic Open Tournament | ||||||
| date2023-04-27 | rnd1 | typeStandard | result0.5 | date2023-04-27 | rnd3 | typeStandard | result0.5 | ||
| OpponentOttermann, A (Ayla) | OpponentDanzfuss, E (Edrich) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 3 | Tournament2025 Etienne Lewis Closed Chess Tournament | Tournament2025 Tshwane South School District CLOSED League Championship | ||||||
| date2025-08-10 | rnd6 | typeStandard | result1 | date2025-08-15 | rnd1 | typeStandard | result1 | ||
| OpponentLeshabane, L (Lesego) | OpponentChidi, M (Mohau) | ||||||||
| 2 | 3 | TournamentConstantiapark Open 2025 | TournamentConstantiapark Open 2025 | ||||||
| date2025-02-15 | rnd3 | typeStandard | result1 | date2025-02-15 | rnd5 | typeStandard | result1 | ||
| OpponentBarnes, D (Derek) | OpponentDe Beer, L (Lily) | ||||||||
| 3 | 3 | TournamentLaerskool Constantiapark Open Chess Tournament 2023 | Tournament2023 Afrikaans Hoër Seunskool Open Chess Tournament | ||||||
| date2023-02-18 | rnd5 | typeStandard | result1 | date2023-03-04 | rnd2 | typeStandard | result1 | ||
| OpponentDanzfuss, E (Edrich) | OpponentFourie, E (Ernest) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 3 | Tournament2025 Etienne Lewis Closed Chess Tournament | Tournament2025 Tshwane South School District CLOSED League Championship | ||||||
| date2025-08-10 | rnd6 | typeStandard | result1 | date2025-08-15 | rnd1 | typeStandard | result1 | ||
| OpponentLeshabane, L (Lesego) | OpponentChidi, M (Mohau) | ||||||||
| 2 | 3 | TournamentConstantiapark Open 2025 | TournamentConstantiapark Open 2025 | ||||||
| date2025-02-15 | rnd3 | typeStandard | result1 | date2025-02-15 | rnd5 | typeStandard | result1 | ||
| OpponentBarnes, D (Derek) | OpponentDe Beer, L (Lily) | ||||||||
| 3 | 3 | TournamentLaerskool Constantiapark Open Chess Tournament 2023 | Tournament2023 Afrikaans Hoër Seunskool Open Chess Tournament | ||||||
| date2023-02-18 | rnd5 | typeStandard | result1 | date2023-03-04 | rnd2 | typeStandard | result1 | ||
| OpponentDanzfuss, E (Edrich) | OpponentFourie, E (Ernest) | ||||||||
| # | 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 | Marais ,L (Luke) | 4 | 0 | -425 | 4 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1301.1 | 876.1 | 1304.2 | 876.1 | 0 | 0 | 0 | 0 | ||||||
| 2 | Westermann ,I (Inge) | 4 | 1 | -212.5 | 4 | 1 | -212.5 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1225.1 | 1012.6 | 1221.5 | 1012.6 | 0 | 0 | 0 | 0 | ||||||
| 3 | Danzfuss ,E (Edrich) | 3 | 2.5 | 283.3 | 3 | 2.5 | 283.3 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1235.2 | 1518.6 | 1229.6 | 1518.6 | 0 | 0 | 0 | 0 | ||||||
| 4 | Rahlaga ,K (Kaelo Alupheli) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1332.8 | 1332.8 | 1326 | 1332.8 | 0 | 0 | 0 | 0 | ||||||
| 5 | Simao ,A (Arya) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1299.2 | 1299.2 | 1311.5 | 1299.2 | 0 | 0 | 0 | 0 | ||||||
| 6 | Ebersohn ,C (Christiaan) | 2 | 2 | 425 | 2 | 2 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1287.3 | 1712.3 | 1282.4 | 1712.3 | 0 | 0 | 0 | 0 | ||||||
| 7 | Bailey ,K (Keanu) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1195.6 | 1195.6 | 1195.2 | 1195.6 | 0 | 0 | 0 | 0 | ||||||
| 8 | Erwee ,HP (Hermanus Philipus) | 2 | 1.5 | 212.5 | 2 | 1.5 | 212.5 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1305.8 | 1518.3 | 1301.1 | 1518.3 | 0 | 0 | 0 | 0 | ||||||
| 9 | Potgieter ,R (Raven) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1140.8 | 1140.8 | 1131.6 | 1140.8 | 0 | 0 | 0 | 0 | ||||||
| 10 | Coetzee ,A (Adriaan) | 2 | 1 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1146.4 | 1146.4 | 1139.6 | 1146.4 | 0 | 0 | 0 | 0 | ||||||
Norms
| # | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
|---|---|---|---|---|---|---|---|---|