Surname or Chess SA id..
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Zachary Choonoo Johnson

1130137320
Cape Town (WCT)
Personal
Main rating
Rating 1297.1
K-factor 36
Floor 797.1
Highest 1297.1 (2026-02-28)
Min/Max +/- allowed 144
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1188.6
Final +/- 0
New Rating
()
Rating 1297.1
K-factor 36
Floor 797.1
Highest 1297.1 (2026-02-28)
Min/Max +/- allowed 144.4
Standard rating
Rating 1296.3
K-factor 36
Floor 800.2
Highest 1396.5 (2024-03-01)
Min/Max +/- allowed 125.3
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1296.3
K-factor 36
Floor 800.2
Highest 1396.5 (2024-03-01)
Min/Max +/- allowed 125.3
Rapid rating
Rating 1228.8
K-factor 36
Floor 734.2
Highest 1292.9 (2022-02-01)
Min/Max +/- allowed 145.3
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1228.8
K-factor 36
Floor 734.2
Highest 1292.9 (2022-02-01)
Min/Max +/- allowed 145.3
Blitz rating
Rating 1200
K-factor 36
Floor 700
Highest 1200 (2018-10-01)
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 (2018-10-01)
Min/Max +/- allowed 165.8
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 District Central Schools Chess Individual Trials 2026 (U13 Open) Standard 2026-02-07 2026-02-07 Cape Town (WCT) 6 1296.8 5 2.5 1303.2 0 Details
2 2025 District Central Schools Chess Individual Trials (U13 Open) Standard 2025-01-31 2025-02-01 Cape Town (WCT) 6 1274.6 6 4 1379.4 0 Details
3 CT Metro Central District Top Schools 2024 (U13 Mixed) Rapid 2024-07-26 2024-07-26 Cape Town (WCT) 5 1270.3 5 3 1297.2 0 Details
4 Cape Town Metro Schools Chess Closed Individuals 2024 (U11 Boys) Standard 2024-03-02 2024-03-03 Cape Town (WCT) 6 1220.1 6 4 1458.8 0 Details
5 CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Boys) Standard 2024-02-03 2024-02-03 Cape Town (WCT) 5 1209.3 5 3 1278.5 0 Details
6 Cape of Good Hope Open 2023 (U12) Rapid 2023-01-28 2023-01-28 Cape Town (WCT) 6 1222.1 6 2 1118.4 0 Details
7 Summer Slam 2022 (C) Rapid 2022-12-13 2022-12-13 Cape Town (WCT) 6 1215.8 6 3.5 1269.3 0 Details
8 Laerskool Welgemoed 12th Annual Chess Challenge 2022 (U8+U10) Rapid 2022-02-19 2022-02-19 Cape Town (WCT) 5 1200 5 3 1304.3 0 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 5
Wins 2
Draws 1
Losses 2
White 3
Black 2
White wins 1
Black wins 1
Score 2.5
Percent 50
Dp 0
AOR 1303.2
Performance 1303.2
Game statistics (History)
Games 44
Wins 24
Draws 2
Losses 18
White 21
Black 23
White wins 11
Black wins 13
Score 25
Percent 56.8
Dp 58
AOR 1243.7
Performance 1301.6
Rankings (Main)
National
Overall 6108
Gender 5045
Age group 840
Gender/Age 620
Provincial
Overall 1827
Gender 1438
Age group 283
Gender/Age 189
Regional
Overall 836
Gender 698
Age group 109
Gender/Age 78
Rankings (Standard)
National
Overall 5465
Gender 4474
Age group 768
Gender/Age 553
Provincial
Overall 1563
Gender 1203
Age group 242
Gender/Age 156
Regional
Overall 732
Gender 594
Age group 99
Gender/Age 68
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 5
Score 2.5
Percent 50
Aor 1303.2
Dp 0
Prat 1303.2
Performance (12 months)
Games 5
Score 2.5
Percent 50
Aor 1303.2
Dp 0
Prat 1303.2
Performance (History)
Games 44
Score 25
Percent 56.8
Aor 1243.7
Dp 58
Prat 1301.6
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Nel, C (Charles Paul) 3 1 2 Laerskool Welgemoed 12th Annual Chess Challenge 2022 (U8+U10) Cape Town Metro Schools Chess Closed Individuals 2024 (U11 Boys) Details
Overall 2 Mngqibisa, P (Phila) 2 0 2 CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Boys) 2025 District Central Schools Chess Individual Trials (U13 Open) Details
Overall 3 Ismail, R (Razeen) 2 1 1 Cape Town Metro Schools Chess Closed Individuals 2024 (U11 Boys) District Central Schools Chess Individual Trials 2026 (U13 Open) Details
Overall 4 Resnekov, O (Oliver) 2 1 1 Laerskool Welgemoed 12th Annual Chess Challenge 2022 (U8+U10) District Central Schools Chess Individual Trials 2026 (U13 Open) Details
Standard 1 Mngqibisa, P (Phila) 2 0 2 CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Boys) 2025 District Central Schools Chess Individual Trials (U13 Open) Details
Standard 2 Ismail, R (Razeen) 2 1 1 Cape Town Metro Schools Chess Closed Individuals 2024 (U11 Boys) District Central Schools Chess Individual Trials 2026 (U13 Open) Details
Rapid 1 Nel, C (Charles Paul) 2 1 1 Laerskool Welgemoed 12th Annual Chess Challenge 2022 (U8+U10) Cape of Good Hope Open 2023 (U12) Details