Surname or Chess SA id..
Chess SA Region AOC Mzansi 2026

PLAYER PAGE

John Mostert

1200328612
Tshwane (GTP)
Personal
Main rating
Rating 907.1
K-factor 40
Floor 699
Highest 1199 (2025-09-30)
Min/Max +/- allowed 166
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 736.5
Final +/- 0
New Rating
()
Rating 907.1
K-factor 40
Floor 699
Highest 1199 (2025-09-30)
Min/Max +/- allowed 166.1
Standard rating
Rating 887.7
K-factor 40
Floor 699
Highest 1199 (2025-09-30)
Min/Max +/- allowed 166.1
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 736.5
Final +/- 0
New Rating
()
Rating 887.7
K-factor 40
Floor 699
Highest 1199 (2025-09-30)
Min/Max +/- allowed 166.1
Rapid rating
Rating 1200
K-factor 40
Floor 700
Highest 1199 (2025-09-30)
Min/Max +/- allowed 166.1
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1200
K-factor 40
Floor 700
Highest 1199 (2025-09-30)
Min/Max +/- allowed 166.1
Blitz rating
Rating 1200
K-factor 40
Floor 700
Highest 1199 (2025-09-30)
Min/Max +/- allowed 166.1
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1200
K-factor 40
Floor 700
Highest 1199 (2025-09-30)
Min/Max +/- allowed 166.1
Rating Graph
Tournaments
No tournaments found.
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 2026 Alekhine Open Chess Tournament (E) Standard 2026-08-29 2026-08-29 Tshwane (GTP) 5 907.1 4 0 620.1 -69.9 Details
2 2026 Etienne Lewis (U8) Standard 2026-08-08 2026-08-08 Tshwane (GTP) 5 907.1 5 1 835.5 -38.3 Details
3 Elise Steenkamp 2026 (Pawn) Standard 2026-06-13 2026-06-13 Tshwane (GTP) 5 1079.9 4 0 696.8 -64.6 Details
4 2026 KSNG Open Chess Tournament (U8+U10) Standard 2026-04-18 2026-04-18 Tshwane (GTP) 5 1122.7 4 0 850.7 -42.7 Details
5 2026 Lubowski Open Chess Tournament (E+F) Standard 2026-03-21 2026-03-21 Tshwane (GTP) 5 1168.4 5 1.5 1033.8 -31.4 Details
6 2026 Silver Lakes Open Chess Tournament (U8) Standard 2026-03-07 2026-03-07 Tshwane (GTP) 4 1168.4 3 1 1058.3 -14.3 Details
7 2026 Tshwane Chess Registration Tournament (U8) Standard 2026-01-31 2026-01-31 Tshwane (GTP) 5 1175.6 5 1 971.8 -19.3 Details
8 2025 Centurion Chess Open Tournament (U8) Standard 2025-09-27 2025-09-27 Tshwane (GTP) 5 1200 5 0 853.2 -33.2 Details
Game statistics ( )
Games 0
Wins 0
Draws 0
Losses 0
White 0
Black 0
White wins 0
Black wins 0
Score 0
Percent 0
Dp 0
AOR 0
Performance 0
Game statistics ()
Games 30
Wins 4
Draws 1
Losses 25
White 14
Black 16
White wins 4
Black wins 0
Score 4.5
Percent 15
Dp -297.5
AOR 1165.9
Performance 868.4
Game statistics (History)
Games 35
Wins 4
Draws 1
Losses 30
White 16
Black 19
White wins 4
Black wins 0
Score 4.5
Percent 12.9
Dp -315.7
AOR 1181.9
Performance 866.2
Rankings (Main)
National
Overall 18972
Gender 13887
Age group 266
Gender/Age 177
Provincial
Overall 6221
Gender 4481
Age group 63
Gender/Age 40
Regional
Overall 1784
Gender 1292
Age group 16
Gender/Age 9
Rankings (Standard)
National
Overall 14139
Gender 10249
Age group 204
Gender/Age 133
Provincial
Overall 4824
Gender 3454
Age group 50
Gender/Age 33
Regional
Overall 1672
Gender 1196
Age group 16
Gender/Age 9
Rankings (Rapid)
National
Overall -1
Gender -1
Age group -1
Gender/Age -1
Provincial
Overall -1
Gender -1
Age group -1
Gender/Age -1
Regional
Overall -1
Gender -1
Age group -1
Gender/Age -1
Rankings (Blitz)
National
Overall -1
Gender -1
Age group -1
Gender/Age -1
Provincial
Overall -1
Gender -1
Age group -1
Gender/Age -1
Regional
Overall -1
Gender -1
Age group -1
Gender/Age -1
Performance ( )
Games 0
Score 0
Percent 0
Aor 0
Dp 0
Prat 0
Performance ()
Games 30
Score 4.5
Percent 15
Aor 1165.9
Dp -297.5
Prat 868.4
Performance (12 months)
Games 35
Score 4.5
Percent 12.9
Aor 1181.9
Dp -315.7
Prat 866.2
Performance (History)
Games 35
Score 4.5
Percent 12.9
Aor 1181.9
Dp -315.7
Prat 866.2
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Jansen Van Vuuren, J (Jaelyn) 5 3 2 2026 Silver Lakes Open Chess Tournament (U8) 2026 Alekhine Open Chess Tournament (E) Details
Overall 2 Sekgobela, A (Adil) 3 2 1 2026 Tshwane Chess Registration Tournament (U8) 2026 Alekhine Open Chess Tournament (E) Details
Overall 3 Rampersadh, A (Ayaan) 2 0 2 2026 Tshwane Chess Registration Tournament (U8) Elise Steenkamp 2026 (Pawn) Details
Overall 4 Maswabela, L (Lethabo) 2 1 1 2026 Lubowski Open Chess Tournament (E+F) Elise Steenkamp 2026 (Pawn) Details
Overall 5 Grobbelaar, N (Nina) 2 0 2 2025 Centurion Chess Open Tournament (U8) 2026 Etienne Lewis (U8) Details
Standard 1 Jansen Van Vuuren, J (Jaelyn) 5 3 2 2026 Silver Lakes Open Chess Tournament (U8) 2026 Alekhine Open Chess Tournament (E) Details
Standard 2 Sekgobela, A (Adil) 3 2 1 2026 Tshwane Chess Registration Tournament (U8) 2026 Alekhine Open Chess Tournament (E) Details
Standard 3 Rampersadh, A (Ayaan) 2 0 2 2026 Tshwane Chess Registration Tournament (U8) Elise Steenkamp 2026 (Pawn) Details
Standard 4 Maswabela, L (Lethabo) 2 1 1 2026 Lubowski Open Chess Tournament (E+F) Elise Steenkamp 2026 (Pawn) Details
Standard 5 Grobbelaar, N (Nina) 2 0 2 2025 Centurion Chess Open Tournament (U8) 2026 Etienne Lewis (U8) Details