PLAYER PAGE
Personal
Chen, Z (Zoey)
Chess SA id
2130192097FIDE id
?Date of birth
2013-09-04 (U14)Gender
FemaleRegion
Johannesburg Metro (GJM)Citizen
RSATitles
Chess SA registered
NoLast active game
2025-09-27Personal details last changed
1900-01-01Junior GPX Games
31.8Junior GPX Points
1187.6| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| Rating | 1285 | 1304.7 | 1186.3 | 1200 |
| Raw rating | 1285 | 1304.7 | 1186.3 | 1200 |
| Weighted rating | 1218.6 | 1226.5 | 1185.3 | 1200 |
| Weighted performance | 1275.3 | 1272.1 | 0 | 0 |
| Floor | 785 | 804.7 | 700 | 700 |
| K-factor | 36 | 36 | 36 | 36 |
| Min/Max rating change allowed | 146.9 | 142.8 | 169.1 | 165.8 |
| Highest rating | 12852025-11-01 | 1324.12024-06-01 | 12002024-02-01 | 12002024-02-01 |
| Highest raw rating | 12852025-11-01 | 1304.72025-11-01 | 12002024-02-01 | 12002024-02-01 |
| Highest weighted rating | 1225.42025-02-01 | 1233.72025-05-05 | 12002024-02-01 | 12002024-02-01 |
| Highest weighted performance | 1275.32025-11-01 | 1324.12024-06-01 | 12002024-12-01 | 12002024-02-01 |
| Prediction | ||||
|---|---|---|---|---|
| Item | Main | Standard | Rapid | Blitz |
| Rating change | 0 | 0 | 0 | 0 |
| New rating | 1285 | 1304.7 | 1186.3 | 1200 |
| Analysis | ||||
| Rating | 1285 | 1304.7 | 1186.3 | 1200 |
| Raw rating | 1285 | 1304.7 | 1186.3 | 1200 |
| Weighted rating | 1218.6 | 1226.5 | 1185.3 | |
| Weighted performance | 1275.3 | 1272.1 | 0 | |
| K-factor | 36 | 36 | 36 | 36 |
| Floor | 785 | 804.7 | 700 | 700 |
| Max/Min rating change allowed | 146.9 | 142.8 | 169.1 | 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 | 1285 | 1304.7 | 1186.3 | 1200 |
| New weighted rating | 1224.3 | 1233.3 | 1185.3 | 1200 |
| New weighted performance | 1267.7 | 1264.5 | 0 | 0 |
| Temp new rating | 1285 | 1304.7 | 1186.3 | 1200 |
| Temp new rating +/- | 0 | 0 | 0 | 0 |
| Final new rating +/- | 0 | 0 | 0 | 0 |
| New rating | 1285 | 1304.7 | 1186.3 | 1200 |
| New K-factor | 36 | 36 | 36 | 36 |
| New floor | 785 | 804.7 | 700 | 700 |
| Item | Main | Standard | Rapid | Blitz |
|---|---|---|---|---|
| 0 | 0 | 0 | 0 | |
| 37 | 30 | 7 | 0 | |
| 20 | 15 | 5 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| 0 | 0 | 0 | 0 | |
| History | 57 | 45 | 12 | 0 |
| Games since | |||||||||||||||||
| Main57 | Standard45 | Rapid12 | Blitz0 | ||||||||||||||
| Gender | Female | ||||||||||||||||
| Age group | U14 | ||||||||||||||||
| Region | Johannesburg Metro (GJM) | ||||||||||||||||
| Province | Gauteng (GT) | ||||||||||||||||
| Main | RSA | Province | Region | ||||||||||||||
| Overall | 3403 | 1139 | 319 | ||||||||||||||
| Female | 713 | 244 | 51 | ||||||||||||||
| U14 | 645 | 211 | 51 | ||||||||||||||
| U14 Female | 173 | 59 | 13 | ||||||||||||||
| Standard | RSA | Province | Region | ||||||||||||||
| Overall | 3130 | 1128 | 309 | ||||||||||||||
| Female | 629 | 224 | 50 | ||||||||||||||
| U14 | 583 | 199 | 48 | ||||||||||||||
| U14 Female | 160 | 54 | 12 | ||||||||||||||
| Rapid | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Female | -1 | -1 | -1 | ||||||||||||||
| U14 | -1 | -1 | -1 | ||||||||||||||
| U14 Female | -1 | -1 | -1 | ||||||||||||||
| Blitz | RSA | Province | Region | ||||||||||||||
| Overall | -1 | -1 | -1 | ||||||||||||||
| Female | -1 | -1 | -1 | ||||||||||||||
| U14 | -1 | -1 | -1 | ||||||||||||||
| U14 Female | -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 | 37 | 15.5 | 41.89 | -68.9 | 1274.7 | 1205.7 |
| Standard | 30 | 14 | 46.67 | -28.3 | 1264.7 | 1236.4 |
| Rapid | 7 | 1.5 | 21.43 | -242.9 | 1317.3 | 1074.4 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| History | ||||||
| Games | Score | % | Dp | AvgOpp | Performance | |
| Main | 57 | 26 | 45.61 | -37.3 | 1255.6 | 1218.3 |
| Standard | 45 | 22.5 | 50 | 0 | 1246.7 | 1246.7 |
| Rapid | 12 | 3.5 | 29.17 | -177.1 | 1288.9 | 1111.8 |
| Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
| Date | Main | Standard | Rapid | Blitz |
| 2025-11-01 | 1285 | 1304.7 | 1186.3 | 1200 |
| 2025-09-30 | 1211.5 | 1217.9 | 1186.3 | 1200 |
| 2025-09-01 | 1211.5 | 1217.9 | 1186.3 | 1200 |
| 2025-08-01 | 1211.5 | 1217.9 | 1186.3 | 1200 |
| 2025-07-01 | 1211.6 | 1218.2 | 1186.3 | 1200 |
| 2025-06-01 | 1209.6 | 1215.1 | 1186.3 | 1200 |
| 2025-05-01 | 1211.2 | 1217.6 | 1186.3 | 1200 |
| 2025-04-01 | 1210.5 | 1216.8 | 1186.3 | 1200 |
| 2025-03-01 | 1209.1 | 1216.2 | 1183.2 | 1200 |
| 2025-02-01 | 1225.4 | 1233.7 | 1187.3 | 1200 |
| 2025-01-01 | 1225.4 | 1233.7 | 1182.8 | 1200 |
| 2024-12-01 | 1225.4 | 1233.7 | 1182.8 | 1200 |
| 2024-11-01 | 1225.4 | 1233.7 | 1182.8 | 1200 |
| 2024-10-01 | 1225.4 | 1233.7 | 1182.8 | 1200 |
| 2024-09-01 | 1197.6 | 1202.4 | 1182.8 | 1200 |
| 2024-08-01 | 1220.6 | 1230.8 | 1182.8 | 1200 |
| 2024-07-01 | 1220.6 | 1230.8 | 1182.8 | 1200 |
| 2024-09-01 | 1193.4 | 1200 | 1182.8 | 1200 |
| 2024-05-01 | 1193.4 | 1200 | 1182.8 | 1200 |
| 2024-04-01 | 1193.4 | 1200 | 1182.8 | 1200 |
| 2024-03-01 | 1193.4 | 1200 | 1182.8 | 1200 |
| 2024-02-01 | 1200 | 1200 | 1200 | 1200 |
| 2024-01-01 | 1200 | 1200 | 1200 | 1200 |
| 2023-12-01 | 1200 | 1200 | 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 Top Schools Teams (U13) | 2025-08-29 | 2025-08-29 | Standard | Tshwane (GTP) | 5 | 5 | 3.5 | Yes | Analysis |
| 2 | 2025 Gauteng Schools Provincial Individual Chess Championship (U13 Girls) | 2025-09-27 | 2025-09-27 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 3 | MCA Winter Chill Classic 2025 (Junior) | 2025-07-19 | 2025-07-19 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 2 | Yes | Analysis |
| 4 | JMC Crawford Sandton 2025 (D) | 2025-05-10 | 2025-05-10 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 2 | Yes | Analysis |
| 5 | MCA Summer March 2025 (Intermediate) | 2025-03-08 | 2025-03-08 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 1.5 | Yes | Analysis |
| 6 | JMC Rapid The Bridge School 2025 (Open) | 2025-02-23 | 2025-02-23 | Rapid | Johannesburg Metro (GJM) | 7 | 7 | 1.5 | Yes | Analysis |
| 7 | MCA Welcome 2025 (Junior) | 2025-02-15 | 2025-02-15 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 2 | Yes | Analysis |
Last 500 tournaments since 01 January 2018
| # | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 2025 Gauteng Top Schools Teams (U13) | 2025-08-29 | 2025-08-29 | Standard | Tshwane (GTP) | 5 | 5 | 3.5 | Yes | Analysis |
| 2 | 2025 Gauteng Schools Provincial Individual Chess Championship (U13 Girls) | 2025-09-27 | 2025-09-27 | Standard | Tshwane (GTP) | 5 | 5 | 3 | Yes | Analysis |
| 3 | MCA Winter Chill Classic 2025 (Junior) | 2025-07-19 | 2025-07-19 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 2 | Yes | Analysis |
| 4 | JMC Crawford Sandton 2025 (D) | 2025-05-10 | 2025-05-10 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 2 | Yes | Analysis |
| 5 | MCA Summer March 2025 (Intermediate) | 2025-03-08 | 2025-03-08 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 1.5 | Yes | Analysis |
| 6 | JMC Rapid The Bridge School 2025 (Open) | 2025-02-23 | 2025-02-23 | Rapid | Johannesburg Metro (GJM) | 7 | 7 | 1.5 | Yes | Analysis |
| 7 | MCA Welcome 2025 (Junior) | 2025-02-15 | 2025-02-15 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 2 | Yes | Analysis |
| 8 | Gauteng Schools Individuals Finals 2024 (U11 Girls) | 2024-08-16 | 2024-08-16 | Standard | Ekurhuleni (GE) | 5 | 5 | 3 | Yes | Analysis |
| 9 | JMC Closed 2024 (D) | 2024-08-09 | 2024-08-11 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 2.5 | Yes | Analysis |
| 10 | JMC Trinityhouse Little Falls 2024 (D) | 2024-06-02 | 2024-06-02 | Standard | Johannesburg Metro (GJM) | 5 | 5 | 3 | Yes | Analysis |
| 11 | Gear Up Mzansi Rapid 2024 (Junior) | 2024-02-17 | 2024-02-17 | Rapid | Johannesburg Metro (GJM) | 5 | 5 | 2 | Yes | Analysis |
Top 3 Streaks
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | Tournament2025 Gauteng Top Schools Teams | Tournament2025 Gauteng Top Schools Teams | ||||||
| date2025-08-29 | rnd2 | typeStandard | result1 | date2025-08-29 | rnd5 | typeStandard | result0.5 | ||
| OpponentDhladhla, O (Owami) | OpponentRamonyathi, P (Phenyo) | ||||||||
| 2 | 3 | TournamentMCA Welcome 2025 | TournamentJMC Rapid The Bridge School 2025 | ||||||
| date2025-02-15 | rnd4 | typeStandard | result1 | date2025-02-23 | rnd1 | typeRapid | result0.5 | ||
| OpponentMoyo, M (Musawenkosi) | OpponentPienaar, LA (Amadeus Leonard) | ||||||||
| 3 | 3 | TournamentJMC Closed 2024 | TournamentGauteng Schools Individuals Finals 2024 | ||||||
| date2024-08-10 | rnd4 | typeStandard | result1 | date2024-08-16 | rnd1 | typeStandard | result1 | ||
| OpponentChikwava, R (Ronald) | OpponentRudolph, L (Leane') | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 4 | TournamentMCA Welcome 2025 | TournamentMCA Summer March 2025 | ||||||
| date2025-02-15 | rnd4 | typeStandard | result1 | date2025-03-08 | rnd2 | typeStandard | result1 | ||
| OpponentMoyo, M (Musawenkosi) | OpponentVenter, J (Jaco) | ||||||||
| 2 | 3 | TournamentJMC Closed 2024 | TournamentGauteng Schools Individuals Finals 2024 | ||||||
| date2024-08-10 | rnd4 | typeStandard | result1 | date2024-08-16 | rnd1 | typeStandard | result1 | ||
| OpponentChikwava, R (Ronald) | OpponentRudolph, L (Leane') | ||||||||
| 3 | 2 | TournamentMCA Winter Chill Classic 2025 | TournamentMCA Winter Chill Classic 2025 | ||||||
| date2025-07-19 | rnd1 | typeStandard | result1 | date2025-07-19 | rnd2 | typeStandard | result1 | ||
| OpponentNganga, A (Alfred) | OpponentSteyn, M (Mari-Louise) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | TournamentGear Up Mzansi Rapid 2024 | TournamentJMC Rapid The Bridge School 2025 | ||||||
| date2024-02-17 | rnd5 | typeRapid | result1 | date2025-02-23 | rnd1 | typeRapid | result0.5 | ||
| OpponentMolaba, O (Oagile) | OpponentPienaar, LA (Amadeus Leonard) | ||||||||
| 2 | 1 | TournamentJMC Rapid The Bridge School 2025 | TournamentJMC Rapid The Bridge School 2025 | ||||||
| date2025-02-23 | rnd4 | typeRapid | result1 | date2025-02-23 | rnd4 | typeRapid | result1 | ||
| OpponentManganyi, X (Xitlhangu) | OpponentManganyi, X (Xitlhangu) | ||||||||
| 3 | 1 | TournamentGear Up Mzansi Rapid 2024 | TournamentGear Up Mzansi Rapid 2024 | ||||||
| date2024-02-17 | rnd3 | typeRapid | result1 | date2024-02-17 | rnd3 | typeRapid | result1 | ||
| OpponentJansen Van Rensburg, W (Wicus) | OpponentJansen Van Rensburg, W (Wicus) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | TournamentMCA Winter Chill Classic 2025 | TournamentMCA Winter Chill Classic 2025 | ||||||
| date2025-07-19 | rnd1 | typeStandard | result1 | date2025-07-19 | rnd2 | typeStandard | result1 | ||
| OpponentNganga, A (Alfred) | OpponentSteyn, M (Mari-Louise) | ||||||||
| 2 | 2 | TournamentMCA Welcome 2025 | TournamentMCA Welcome 2025 | ||||||
| date2025-02-15 | rnd4 | typeStandard | result1 | date2025-02-15 | rnd5 | typeStandard | result1 | ||
| OpponentMoyo, M (Musawenkosi) | OpponentNaidoo, T (Talin) | ||||||||
| 3 | 2 | TournamentGauteng Schools Individuals Finals 2024 | TournamentGauteng Schools Individuals Finals 2024 | ||||||
| date2024-08-16 | rnd3 | typeStandard | result1 | date2024-08-16 | rnd4 | typeStandard | result1 | ||
| OpponentRahube, R (Remolebogile) | OpponentKeyter, A (Alissa) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2 | TournamentMCA Winter Chill Classic 2025 | TournamentMCA Winter Chill Classic 2025 | ||||||
| date2025-07-19 | rnd1 | typeStandard | result1 | date2025-07-19 | rnd2 | typeStandard | result1 | ||
| OpponentNganga, A (Alfred) | OpponentSteyn, M (Mari-Louise) | ||||||||
| 2 | 2 | TournamentMCA Welcome 2025 | TournamentMCA Welcome 2025 | ||||||
| date2025-02-15 | rnd4 | typeStandard | result1 | date2025-02-15 | rnd5 | typeStandard | result1 | ||
| OpponentMoyo, M (Musawenkosi) | OpponentNaidoo, T (Talin) | ||||||||
| 3 | 2 | TournamentGauteng Schools Individuals Finals 2024 | TournamentGauteng Schools Individuals Finals 2024 | ||||||
| date2024-08-16 | rnd3 | typeStandard | result1 | date2024-08-16 | rnd4 | typeStandard | result1 | ||
| OpponentRahube, R (Remolebogile) | OpponentKeyter, A (Alissa) | ||||||||
| # | Games | Start | End | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1 | TournamentJMC Rapid The Bridge School 2025 | TournamentJMC Rapid The Bridge School 2025 | ||||||
| date2025-02-23 | rnd4 | typeRapid | result1 | date2025-02-23 | rnd4 | typeRapid | result1 | ||
| OpponentManganyi, X (Xitlhangu) | OpponentManganyi, X (Xitlhangu) | ||||||||
| 2 | 1 | TournamentGear Up Mzansi Rapid 2024 | TournamentGear Up Mzansi Rapid 2024 | ||||||
| date2024-02-17 | rnd5 | typeRapid | result1 | date2024-02-17 | rnd5 | typeRapid | result1 | ||
| OpponentMolaba, O (Oagile) | OpponentMolaba, O (Oagile) | ||||||||
| 3 | 1 | TournamentGear Up Mzansi Rapid 2024 | TournamentGear Up Mzansi Rapid 2024 | ||||||
| date2024-02-17 | rnd3 | typeRapid | result1 | date2024-02-17 | rnd3 | typeRapid | result1 | ||
| OpponentJansen Van Rensburg, W (Wicus) | OpponentJansen Van Rensburg, W (Wicus) | ||||||||
| # | 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 | Gokool ,N (Nishka) | 2 | 0 | -425 | 0 | 0 | 0 | 2 | 0 | -425 | 0 | 0 | 0 |
| 1327.6 | 902.6 | 0 | 0 | 1255.2 | 902.6 | 0 | 0 | ||||||
| 2 | Ramonyai ,M (Motshabo) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1388.8 | 963.8 | 1389.2 | 963.8 | 0 | 0 | 0 | 0 | ||||||
| 3 | Jennings ,K (Kayleigh) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 1625 | 1200 | 1625 | 0 | 0 | 0 | 0 | ||||||
| 4 | Moletsane ,O (Oabile) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1244.7 | 819.7 | 1254.6 | 819.7 | 0 | 0 | 0 | 0 | ||||||
| 5 | Steyn ,A (Anneke) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1289.1 | 864.1 | 1297.2 | 864.1 | 0 | 0 | 0 | 0 | ||||||
| 6 | Dube ,S (Siphekonke) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1156.2 | 1581.2 | 1146.8 | 1581.2 | 0 | 0 | 0 | 0 | ||||||
| 7 | Tshabalala ,H (Happy) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1021.6 | 1446.6 | 1001.6 | 1446.6 | 0 | 0 | 0 | 0 | ||||||
| 8 | Prakash ,M (Maisha) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1250.6 | 825.6 | 1246.4 | 825.6 | 0 | 0 | 0 | 0 | ||||||
| 9 | Moyo ,M (Musawenkosi) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1200 | 1625 | 1200 | 1625 | 0 | 0 | 0 | 0 | ||||||
| 10 | Msiza ,C (Collen) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1277 | 1702 | 1286.5 | 1702 | 0 | 0 | 0 | 0 | ||||||
Norms
| # | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
|---|---|---|---|---|---|---|---|---|

