PLAYER PAGE

Personal

Coertzen, J (Janco)

Chess SA id

1100160139

FIDE id

?

Date of birth

2010-09-23 (U16)

Gender

Male

Region

Mangaung (FMB)

Citizen

RSA

Titles

Chess SA registered

No

Last active game

2024-05-05

Personal details last changed

1900-01-01

Junior 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 1260.5
2024-02-01
1272.2
2024-05-01
1330.9
2024-02-01
1200
2018-10-01
Highest raw rating 1228.9
2024-03-01
1216.2
2024-06-01
1266.6
2024-03-01
1200
2024-03-01
Highest weighted rating 1211.7
2025-08-01
1213.8
2025-08-01
1266.6
2025-05-05
1200
2018-10-01
Highest weighted performance 1260.5
2024-02-01
1272.2
2024-05-01
1330.9
2024-02-01
1200
2024-03-01

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
Main
25
Standard
5
Rapid
20
Blitz
0
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

No tournaments found.
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
No tournaments found.
# 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 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 Tournament
Mangaung Metro Chess 10 February 2024
Tournament
Bloemfontein High School League 16 February 2024
date
2024-02-10
rnd
3
type
Rapid
result
1
date
2024-02-16
rnd
4
type
Rapid
result
1
Opponent
Van Rooyen, CG (Conrad Gerhard)
Opponent
Monaheng, P (Poloko)
2 4 Tournament
Bloemfontein Highschool League 2024
Tournament
Bloemfontein Highschool League 2024
date
2024-03-08
rnd
1
type
Rapid
result
1
date
2024-03-08
rnd
4
type
Rapid
result
1
Opponent
Fumba, B (Babalo)
Opponent
Mitchell, T (Thomas)
3 2 Tournament
Spartan Bishops Chess Championships 2024
Tournament
Spartan Bishops Chess Championships 2024
date
2024-05-04
rnd
3
type
Standard
result
1
date
2024-05-04
rnd
4
type
Standard
result
1
Opponent
Tladi, O (Ofentse)
Opponent
Monare, O (Oratilwe)
# Games Start End
1 2 Tournament
Spartan Bishops Chess Championships 2024
Tournament
Spartan Bishops Chess Championships 2024
date
2024-05-04
rnd
3
type
Standard
result
1
date
2024-05-04
rnd
4
type
Standard
result
1
Opponent
Tladi, O (Ofentse)
Opponent
Monare, O (Oratilwe)
# Games Start End
1 7 Tournament
Mangaung Metro Chess 10 February 2024
Tournament
Bloemfontein High School League 16 February 2024
date
2024-02-10
rnd
3
type
Rapid
result
1
date
2024-02-16
rnd
4
type
Rapid
result
1
Opponent
Van Rooyen, CG (Conrad Gerhard)
Opponent
Monaheng, P (Poloko)
2 4 Tournament
Bloemfontein Highschool League 2024
Tournament
Bloemfontein Highschool League 2024
date
2024-03-08
rnd
1
type
Rapid
result
1
date
2024-03-08
rnd
4
type
Rapid
result
1
Opponent
Fumba, B (Babalo)
Opponent
Mitchell, T (Thomas)
3 2 Tournament
August Primary School Chess Festival 2023
Tournament
August Primary School Chess Festival 2023
date
2023-08-04
rnd
1
type
Rapid
result
1
date
2023-08-04
rnd
2
type
Rapid
result
1
Opponent
De Gouveia, O (Oriana)
Opponent
Streicher, C (Calla)
No games found.
# Games Start End
# Games Start End
1 4 Tournament
Bloemfontein High School League 16 February 2024
Tournament
Bloemfontein High School League 16 February 2024
date
2024-02-16
rnd
1
type
Rapid
result
1
date
2024-02-16
rnd
4
type
Rapid
result
1
Opponent
Mokhachane, K (Kgalalelo)
Opponent
Monaheng, P (Poloko)
2 2 Tournament
Spartan Bishops Chess Championships 2024
Tournament
Spartan Bishops Chess Championships 2024
date
2024-05-04
rnd
3
type
Standard
result
1
date
2024-05-04
rnd
4
type
Standard
result
1
Opponent
Tladi, O (Ofentse)
Opponent
Monare, O (Oratilwe)
3 2 Tournament
Bloemfontein Highschool League 2024
Tournament
Bloemfontein Highschool League 2024
date
2024-03-08
rnd
3
type
Rapid
result
1
date
2024-03-08
rnd
4
type
Rapid
result
1
Opponent
Visser, M (Micayla)
Opponent
Mitchell, T (Thomas)
# Games Start End
1 2 Tournament
Spartan Bishops Chess Championships 2024
Tournament
Spartan Bishops Chess Championships 2024
date
2024-05-04
rnd
3
type
Standard
result
1
date
2024-05-04
rnd
4
type
Standard
result
1
Opponent
Tladi, O (Ofentse)
Opponent
Monare, O (Oratilwe)
# Games Start End
1 4 Tournament
Bloemfontein High School League 16 February 2024
Tournament
Bloemfontein High School League 16 February 2024
date
2024-02-16
rnd
1
type
Rapid
result
1
date
2024-02-16
rnd
4
type
Rapid
result
1
Opponent
Mokhachane, K (Kgalalelo)
Opponent
Monaheng, P (Poloko)
2 2 Tournament
Bloemfontein Highschool League 2024
Tournament
Bloemfontein Highschool League 2024
date
2024-03-08
rnd
3
type
Rapid
result
1
date
2024-03-08
rnd
4
type
Rapid
result
1
Opponent
Visser, M (Micayla)
Opponent
Mitchell, T (Thomas)
3 2 Tournament
Mangaung Metro Chess 10 February 2024
Tournament
Mangaung Metro Chess 10 February 2024
date
2024-02-10
rnd
3
type
Rapid
result
1
date
2024-02-10
rnd
4
type
Rapid
result
1
Opponent
Van Rooyen, CG (Conrad Gerhard)
Opponent
Mohomed, E (Esa)
No games found.
# 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

No norms achieved.
# Norm Tournament Start End Rounds Games Score Details
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