PLAYER PAGE
Personal

Coertzen, J (Janco)
Chess SA id
1100160139FIDE id
?Date of birth
2010-09-23 (U16)Gender
MaleRegion
Mangaung (FMB)Citizen
RSATitles
Chess SA registered
NoLast active game
2024-05-05Personal details last changed
1900-01-01Junior GPX Games
Junior GPX Points
Item | Main | Standard | Rapid | Blitz |
---|---|---|---|---|
Rating | 1212.3 | 1216.2 | 1214.3 | 1200 |
Raw rating | 1212.3 | 1216.2 | 1214.3 | 1200 |
Weighted rating | 1211.9 | 1214.7 | 1213.9 | 1200 |
Weighted performance | 949.5 | 0 | 954.8 | 0 |
Floor | 728.9 | 716.2 | 766.6 | 700 |
K-factor | 36 | 36 | 36 | 36 |
Min/Max rating change allowed | 162.9 | 162 | 162.5 | 165.8 |
Highest rating | 1260.52024-02-01 | 1272.22024-05-01 | 1330.92024-02-01 | 12002018-10-01 |
Highest raw rating | 1228.92024-03-01 | 1216.22024-06-01 | 1266.62024-03-01 | 12002024-03-01 |
Highest weighted rating | 1211.72025-08-01 | 1213.82025-08-01 | 1266.62025-05-05 | 12002018-10-01 |
Highest weighted performance | 1260.52024-02-01 | 1272.22024-05-01 | 1330.92024-02-01 | 12002024-03-01 |
Prediction | ||||
---|---|---|---|---|
Item | Main | Standard | Rapid | Blitz |
Rating change | 0 | 0 | 0 | 0 |
New rating | 1212.3 | 1216.2 | 1214.3 | 1200 |
Analysis | ||||
Rating | 1212.3 | 1216.2 | 1214.3 | 1200 |
Raw rating | 1212.3 | 1216.2 | 1214.3 | 1200 |
Weighted rating | 1211.9 | 1214.7 | 1213.9 | |
Weighted performance | 949.5 | 0 | 954.8 | |
K-factor | 36 | 36 | 36 | 36 |
Floor | 728.9 | 716.2 | 766.6 | 700 |
Max/Min rating change allowed | 162.9 | 162 | 162.5 | 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 | 1212.3 | 1216.2 | 1214.3 | 1200 |
New weighted rating | 1212 | 1215.1 | 1213.8 | 1200 |
New weighted performance | 949.1 | 0 | 954.4 | 0 |
Temp new rating | 1212.3 | 1216.2 | 1214.3 | 1200 |
Temp new rating +/- | 0 | 0 | 0 | 0 |
Final new rating +/- | 0 | 0 | 0 | 0 |
New rating | 1212.3 | 1216.2 | 1214.3 | 1200 |
New K-factor | 36 | 36 | 36 | 36 |
New floor | 728.9 | 716.2 | 766.6 | 700 |
Item | Main | Standard | Rapid | Blitz |
---|---|---|---|---|
0 | 0 | 0 | 0 | |
0 | 0 | 0 | 0 | |
25 | 5 | 20 | 0 | |
5 | 0 | 5 | 0 | |
0 | 0 | 0 | 0 | |
0 | 0 | 0 | 0 | |
History | 30 | 5 | 25 | 0 |
Games since | |||||||||||||||||
Main25 | Standard5 | Rapid20 | Blitz0 | ||||||||||||||
Gender | Male | ||||||||||||||||
Age group | U16 | ||||||||||||||||
Region | Mangaung (FMB) | ||||||||||||||||
Province | Free State (FS) | ||||||||||||||||
Main | RSA | Province | Region | ||||||||||||||
Overall | -1 | -1 | -1 | ||||||||||||||
Male | -1 | -1 | -1 | ||||||||||||||
U16 | -1 | -1 | -1 | ||||||||||||||
U16 Male | -1 | -1 | -1 | ||||||||||||||
Standard | RSA | Province | Region | ||||||||||||||
Overall | -1 | -1 | -1 | ||||||||||||||
Male | -1 | -1 | -1 | ||||||||||||||
U16 | -1 | -1 | -1 | ||||||||||||||
U16 Male | -1 | -1 | -1 | ||||||||||||||
Rapid | RSA | Province | Region | ||||||||||||||
Overall | 1547 | 56 | 53 | ||||||||||||||
Male | 1205 | 50 | 47 | ||||||||||||||
U16 | 254 | 9 | 8 | ||||||||||||||
U16 Male | 198 | 9 | 8 | ||||||||||||||
Blitz | RSA | Province | Region | ||||||||||||||
Overall | -1 | -1 | -1 | ||||||||||||||
Male | -1 | -1 | -1 | ||||||||||||||
U16 | -1 | -1 | -1 | ||||||||||||||
U16 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 | 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 |
History | ||||||
Games | Score | % | Dp | AvgOpp | Performance | |
Main | 30 | 16 | 53.33 | 28.3 | 1221.3 | 1249.6 |
Standard | 5 | 2 | 40 | -85 | 1352.3 | 1267.3 |
Rapid | 25 | 14 | 56 | 51 | 1195.1 | 1246.1 |
Blitz | 0 | 0 | 0 | 0 | 0 | 0 |
Date | Main | Standard | Rapid | Blitz |
2025-09-30 | 1212.3 | 1216.2 | 1214.3 | 1200 |
2025-09-01 | 1212.3 | 1216.2 | 1214.3 | 1200 |
2025-08-01 | 1212.3 | 1216.2 | 1214.3 | 1200 |
2025-07-01 | 1212.3 | 1216.2 | 1214.3 | 1200 |
2025-06-01 | 1212.3 | 1216.2 | 1214.3 | 1200 |
2025-05-01 | 1212.3 | 1216.2 | 1214.3 | 1200 |
2025-04-01 | 1212.3 | 1216.2 | 1214.3 | 1200 |
2025-03-01 | 1212.3 | 1216.2 | 1214.2 | 1200 |
2025-02-01 | 1212.3 | 1216.2 | 1213.8 | 1200 |
2025-01-01 | 1212.3 | 1216.2 | 1210.4 | 1200 |
2024-12-01 | 1212.3 | 1216.2 | 1210.4 | 1200 |
2024-11-01 | 1212.3 | 1216.2 | 1210.4 | 1200 |
2024-10-01 | 1212.3 | 1216.2 | 1210.4 | 1200 |
2024-09-01 | 1212.3 | 1216.2 | 1210.4 | 1200 |
2024-08-01 | 1212.3 | 1216.2 | 1210.4 | 1200 |
2024-07-01 | 1212.3 | 1216.2 | 1210.4 | 1200 |
2024-06-01 | 1212.3 | 1216.2 | 1210.4 | 1200 |
2024-08-01 | 1199.2 | 1200 | 1210.4 | 1200 |
2024-04-01 | 1199.2 | 1200 | 1210.4 | 1200 |
2024-03-01 | 1228.9 | 1200 | 1266.6 | 1200 |
2024-02-01 | 1209 | 1200 | 1217.6 | 1200 |
2024-01-01 | 1209 | 1200 | 1217.6 | 1200 |
2023-12-01 | 1209 | 1200 | 1217.6 | 1200 |
2023-11-01 | 1209 | 1200 | 1217.6 | 1200 |
Comming soon.
Tournaments
# | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
---|
# | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
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Last 500 tournaments since 01 January 2018
# | Tournament | Start | End | Type | Host | Rounds | Games | Score | Cfr | Analysis |
---|---|---|---|---|---|---|---|---|---|---|
1 | Spartan Bishops Chess Championships 2024 (Knights) | 2024-05-04 | 2024-05-05 | Standard | Bojanala Platina (NBR) | 5 | 5 | 2 | Yes | Analysis |
2 | Bloemfontein Highschool League 2024 (U15A) | 2024-03-08 | 2024-03-08 | Rapid | Mangaung (FMB) | 5 | 5 | 3.5 | Yes | Analysis |
3 | Mangaung Metro Chess 9 March 2024 (B) | 2024-03-09 | 2024-03-09 | Rapid | Mangaung (FMB) | 5 | 5 | 1 | Yes | Analysis |
4 | Mangaung Metro Chess 10 February 2024 (B) | 2024-02-10 | 2024-02-10 | Rapid | Mangaung (FMB) | 5 | 5 | 2.5 | Yes | Analysis |
5 | Bloemfontein High School League 16 February 2024 (U15A) | 2024-02-16 | 2024-02-16 | Rapid | Mangaung (FMB) | 5 | 5 | 4 | Yes | Analysis |
6 | August Primary School Chess Festival 2023 (Grade 6+7 A) | 2023-08-04 | 2023-08-04 | Rapid | Mangaung (FMB) | 5 | 5 | 3 | Yes | Analysis |
Top 3 Streaks
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 7 | TournamentMangaung Metro Chess 10 February 2024 | TournamentBloemfontein High School League 16 February 2024 | ||||||
date2024-02-10 | rnd3 | typeRapid | result1 | date2024-02-16 | rnd4 | typeRapid | result1 | ||
OpponentVan Rooyen, CG (Conrad Gerhard) | OpponentMonaheng, P (Poloko) | ||||||||
2 | 4 | TournamentBloemfontein Highschool League 2024 | TournamentBloemfontein Highschool League 2024 | ||||||
date2024-03-08 | rnd1 | typeRapid | result1 | date2024-03-08 | rnd4 | typeRapid | result1 | ||
OpponentFumba, B (Babalo) | OpponentMitchell, T (Thomas) | ||||||||
3 | 2 | TournamentSpartan Bishops Chess Championships 2024 | TournamentSpartan Bishops Chess Championships 2024 | ||||||
date2024-05-04 | rnd3 | typeStandard | result1 | date2024-05-04 | rnd4 | typeStandard | result1 | ||
OpponentTladi, O (Ofentse) | OpponentMonare, O (Oratilwe) |
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 2 | TournamentSpartan Bishops Chess Championships 2024 | TournamentSpartan Bishops Chess Championships 2024 | ||||||
date2024-05-04 | rnd3 | typeStandard | result1 | date2024-05-04 | rnd4 | typeStandard | result1 | ||
OpponentTladi, O (Ofentse) | OpponentMonare, O (Oratilwe) |
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 7 | TournamentMangaung Metro Chess 10 February 2024 | TournamentBloemfontein High School League 16 February 2024 | ||||||
date2024-02-10 | rnd3 | typeRapid | result1 | date2024-02-16 | rnd4 | typeRapid | result1 | ||
OpponentVan Rooyen, CG (Conrad Gerhard) | OpponentMonaheng, P (Poloko) | ||||||||
2 | 4 | TournamentBloemfontein Highschool League 2024 | TournamentBloemfontein Highschool League 2024 | ||||||
date2024-03-08 | rnd1 | typeRapid | result1 | date2024-03-08 | rnd4 | typeRapid | result1 | ||
OpponentFumba, B (Babalo) | OpponentMitchell, T (Thomas) | ||||||||
3 | 2 | TournamentAugust Primary School Chess Festival 2023 | TournamentAugust Primary School Chess Festival 2023 | ||||||
date2023-08-04 | rnd1 | typeRapid | result1 | date2023-08-04 | rnd2 | typeRapid | result1 | ||
OpponentDe Gouveia, O (Oriana) | OpponentStreicher, C (Calla) |
# | Games | Start | End |
---|
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 4 | TournamentBloemfontein High School League 16 February 2024 | TournamentBloemfontein High School League 16 February 2024 | ||||||
date2024-02-16 | rnd1 | typeRapid | result1 | date2024-02-16 | rnd4 | typeRapid | result1 | ||
OpponentMokhachane, K (Kgalalelo) | OpponentMonaheng, P (Poloko) | ||||||||
2 | 2 | TournamentSpartan Bishops Chess Championships 2024 | TournamentSpartan Bishops Chess Championships 2024 | ||||||
date2024-05-04 | rnd3 | typeStandard | result1 | date2024-05-04 | rnd4 | typeStandard | result1 | ||
OpponentTladi, O (Ofentse) | OpponentMonare, O (Oratilwe) | ||||||||
3 | 2 | TournamentBloemfontein Highschool League 2024 | TournamentBloemfontein Highschool League 2024 | ||||||
date2024-03-08 | rnd3 | typeRapid | result1 | date2024-03-08 | rnd4 | typeRapid | result1 | ||
OpponentVisser, M (Micayla) | OpponentMitchell, T (Thomas) |
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 2 | TournamentSpartan Bishops Chess Championships 2024 | TournamentSpartan Bishops Chess Championships 2024 | ||||||
date2024-05-04 | rnd3 | typeStandard | result1 | date2024-05-04 | rnd4 | typeStandard | result1 | ||
OpponentTladi, O (Ofentse) | OpponentMonare, O (Oratilwe) |
# | Games | Start | End | ||||||
---|---|---|---|---|---|---|---|---|---|
1 | 4 | TournamentBloemfontein High School League 16 February 2024 | TournamentBloemfontein High School League 16 February 2024 | ||||||
date2024-02-16 | rnd1 | typeRapid | result1 | date2024-02-16 | rnd4 | typeRapid | result1 | ||
OpponentMokhachane, K (Kgalalelo) | OpponentMonaheng, P (Poloko) | ||||||||
2 | 2 | TournamentBloemfontein Highschool League 2024 | TournamentBloemfontein Highschool League 2024 | ||||||
date2024-03-08 | rnd3 | typeRapid | result1 | date2024-03-08 | rnd4 | typeRapid | result1 | ||
OpponentVisser, M (Micayla) | OpponentMitchell, T (Thomas) | ||||||||
3 | 2 | TournamentMangaung Metro Chess 10 February 2024 | TournamentMangaung Metro Chess 10 February 2024 | ||||||
date2024-02-10 | rnd3 | typeRapid | result1 | date2024-02-10 | rnd4 | typeRapid | result1 | ||
OpponentVan Rooyen, CG (Conrad Gerhard) | OpponentMohomed, E (Esa) |
# | 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 | Mitchell ,T (Thomas) | 2 | 1 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 0 |
1262.5 | 1262.5 | 0 | 0 | 1299.8 | 1262.5 | 0 | 0 | ||||||
2 | Mohomed ,E (Esa) | 2 | 2 | 425 | 0 | 0 | 0 | 2 | 2 | 425 | 0 | 0 | 0 |
1200 | 1625 | 0 | 0 | 1200 | 1625 | 0 | 0 | ||||||
3 | Tshetlhe ,B (Blessing) | 1 | 0 | -425 | 1 | 0 | -425 | 0 | 0 | 0 | 0 | 0 | 0 |
1537.4 | 1112.4 | 1544 | 1112.4 | 0 | 0 | 0 | 0 | ||||||
4 | Monare ,O (Oratilwe) | 1 | 1 | 425 | 1 | 1 | 425 | 0 | 0 | 0 | 0 | 0 | 0 |
1232.6 | 1657.6 | 1226.2 | 1657.6 | 0 | 0 | 0 | 0 | ||||||
5 | Streicher ,C (Calla) | 1 | 1 | 425 | 0 | 0 | 0 | 1 | 1 | 425 | 0 | 0 | 0 |
1321.7 | 1746.7 | 0 | 0 | 1213.2 | 1746.7 | 0 | 0 | ||||||
6 | Fumba ,B (Babalo) | 1 | 1 | 425 | 0 | 0 | 0 | 1 | 1 | 425 | 0 | 0 | 0 |
1204.7 | 1629.7 | 0 | 0 | 1265.5 | 1629.7 | 0 | 0 | ||||||
7 | De Gouveia ,O (Oriana) | 1 | 1 | 425 | 0 | 0 | 0 | 1 | 1 | 425 | 0 | 0 | 0 |
1200 | 1625 | 0 | 0 | 1200 | 1625 | 0 | 0 | ||||||
8 | Snybert ,S (Stefan) | 1 | 0.5 | 0 | 0 | 0 | 0 | 1 | 0.5 | 0 | 0 | 0 | 0 |
1207.6 | 1207.6 | 0 | 0 | 1215.8 | 1207.6 | 0 | 0 | ||||||
9 | Zhu ,E (Eric) | 1 | 0 | -425 | 0 | 0 | 0 | 1 | 0 | -425 | 0 | 0 | 0 |
1170.7 | 745.7 | 0 | 0 | 1144 | 745.7 | 0 | 0 | ||||||
10 | Melville ,J (Jason) | 1 | 0 | -425 | 0 | 0 | 0 | 1 | 0 | -425 | 0 | 0 | 0 |
1300.8 | 875.8 | 0 | 0 | 1314 | 875.8 | 0 | 0 |
Norms
# | Norm | Tournament | Start | End | Rounds | Games | Score | Details |
---|---|---|---|---|---|---|---|---|