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

PLAYER PAGE

Joha Viljoen

1120316249
Cape Winelands (WCW)
Personal
Main rating
Rating 1209.5
K-factor 36
Floor 725.1
Highest 1225.1 (2026-03-01)
Min/Max +/- allowed 160
Rating Change
()
Games 7
Score 1.5
We 3.31
SWe -1.81
Temp +/- -65.2
Penalties 0
Weight perform 1094
Final +/- -65.2
New Rating
()
Rating 1144.2
K-factor 36
Floor 725.1
Highest 1225.1 (2026-03-01)
Min/Max +/- allowed 160
Standard rating
Rating 1189.5
K-factor 36
Floor 709.5
Highest 1209.5 (2026-03-01)
Min/Max +/- allowed 163.6
Rating Change
()
Games 7
Score 1.5
We 3.29
SWe -1.79
Temp +/- -64.4
Penalties 0
Weight perform 0
Final +/- -64.4
New Rating
()
Rating 1125.1
K-factor 36
Floor 709.5
Highest 1209.5 (2026-03-01)
Min/Max +/- allowed 163.6
Rapid rating
Rating 1233.9
K-factor 36
Floor 733.9
Highest 1233.9 (2025-09-01)
Min/Max +/- allowed 158
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1233.9
K-factor 36
Floor 733.9
Highest 1233.9 (2025-09-01)
Min/Max +/- allowed 158
Blitz rating
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2025-03-01)
Min/Max +/- allowed 165.8
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 36
Floor 700
Highest 1200 (2025-03-01)
Min/Max +/- allowed 165.8
Rating Graph
Tournaments
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 South African Open Championship 2026 (U15 Boys) Classical 2026-07-02 2026-07-05 Cape Town (WCT) 7 1209.5 7 1.5 992 -65.2 Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 CTCF Open Championship 2026 (U16) Classical 2026-06-13 2026-06-14 Cape Town (WCT) 6 1225.1 6 2 1164.3 -15.7 Details
2 Cape Winelands Schools - High School Trials 1 2026 (U15 Boys) Standard 2026-02-28 2026-02-28 Cape Winelands 5 1223 5 2.5 1242.4 2.1 Details
3 Stellenbosch Primary 2025 (U13) Rapid 2025-08-16 2025-08-16 Cape Winelands (WCW) 5 1199.9 5 3 1356.2 11.6 Details
4 Cape Winelands Schools - Trials 1 2025 (U13 Boys) Standard 2025-02-22 2025-02-22 Cape Winelands (WCW) 5 1200 5 2 1130.4 -6.1 Details
Game statistics ( )
Games 7
Wins 1
Draws 1
Losses 5
White 4
Black 3
White wins 1
Black wins 0
Score 1.5
Percent 21.4
Dp -242.9
AOR 1234.9
Performance 992
Game statistics ()
Games 18
Wins 5
Draws 2
Losses 11
White 10
Black 8
White wins 3
Black wins 2
Score 6
Percent 33.3
Dp -141.7
AOR 1260.7
Performance 1119
Game statistics (History)
Games 28
Wins 10
Draws 2
Losses 16
White 14
Black 14
White wins 5
Black wins 5
Score 11
Percent 39.3
Dp -91.1
AOR 1254.5
Performance 1163.4
Rankings (Main)
National
Overall 12416
Gender 9785
Age group 2287
Gender/Age 1740
Provincial
Overall 3487
Gender 2673
Age group 635
Gender/Age 478
Regional
Overall 546
Gender 402
Age group 124
Gender/Age 93
Rankings (Standard)
National
Overall 11467
Gender 8763
Age group 2045
Gender/Age 1515
Provincial
Overall 3336
Gender 2443
Age group 583
Gender/Age 420
Regional
Overall 550
Gender 391
Age group 118
Gender/Age 85
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 7
Score 1.5
Percent 21.4
Aor 1234.9
Dp -242.9
Prat 992
Performance ()
Games 18
Score 6
Percent 33.3
Aor 1260.7
Dp -141.7
Prat 1119
Performance (12 months)
Games 23
Score 9
Percent 39.1
Aor 1262.9
Dp -92.4
Prat 1170.6
Performance (History)
Games 28
Score 11
Percent 39.3
Aor 1254.5
Dp -91.1
Prat 1163.4
Top 5 opponents most often played
Player not found.
Type # Opponent Games White Black First tournament Last tournament Details