Chess South Africa Ratings Database

PLAYER PAGE

Personal

Joubert, Z (Zani)

Chess SA id

2170191603

FIDE id

Date of birth

2017-05-03 (U10)

Gender

Female

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-12-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1303.3	1303.7	1173.7	1200
Raw rating	1290.9	1294.1	1173.7	1200
Weighted rating	1198.6	1196.6	1170.9	1200
Weighted performance	1303.3	1303.7	0	0
Floor	790.9	794.1	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	145.7	145	172.1	165.8
Highest rating	1303.3 2026-01-01	1303.7 2026-01-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1290.9 2026-01-01	1294.1 2026-01-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1238.6 2018-10-01	1237.8 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1303.3 2026-01-01	1303.7 2026-01-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-8.9	-8.9	0	0
New rating	1294.4	1294.9	1173.7	1200
Analysis
Rating	1303.3	1303.7	1173.7	1200
Raw rating	1290.9	1294.1	1173.7	1200
Weighted rating	1198.6	1196.6	1170.9
Weighted performance	1303.3	1303.7	0
K-factor	36	36	36	36
Floor	790.9	794.1	700	700
Max/Min rating change allowed	145.7	145	172.1	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	1290.9	1294.1	1173.7	1200
New weighted rating	1207.9	1206.4	1171.1	1200
New weighted performance	1294.4	1294.9	0	0
Temp new rating	1294.4	1294.9	1173.7	1200
Temp new rating +/-	-8.9	-8.9	0	0
Final new rating +/-	-8.9	-8.9	0	0
New rating	1294.4	1294.9	1173.7	1200
New K-factor	36	36	36	36
New floor	790.9	794.1	700	700

Item	Main	Standard	Rapid
	0	0	0
	54	54	0
	68	56	12
	0	0	0
	0	0	0
	0	0	0
History	122	110	12

Games since
	Main 122	Standard 110		Rapid 12		Blitz 0
Gender	Female
Age group	U10
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	3809		1251		352
Female	856		281		63
U10	347		123		36
U10 Female	73		19		7
Standard
	RSA		Province		Region
Overall	3717		1330		351
Female	827		289		67
U10	324		132		37
U10 Female	66		19		7
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U10	-1		-1		-1
U10 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U10	-1		-1		-1
U10 Female	-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	54	21	38.89	-94.4	1313.4	1219
Standard	54	21	38.89	-94.4	1313.4	1219
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	122	48	39.34	-90.6	1250.4	1159.8
Standard	110	43	39.09	-92.7	1255.9	1163.1
Rapid	12	5	41.67	-70.8	1200.6	1129.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1290.9	1294.1	1173.7	1200
2025-11-30	1241.5	1241.9	1173.7	1200
2025-11-01	1241.5	1241.9	1173.7	1200
2025-09-30	1241.5	1241.9	1173.7	1200
2025-09-01	1241.5	1241.9	1173.7	1200
2025-08-01	1238.6	1237.8	1173.7	1200
2025-07-01	1238.6	1237.8	1173.7	1200
2025-06-01	1173.5	1163.8	1173.7	1200
2025-05-01	1235.3	1237.5	1173.7	1200
2025-04-01	1196.7	1195.5	1173.7	1200
2025-03-01	1142.9	1138.7	1173.7	1200
2025-02-01	1144.6	1141.8	1173.5	1200
2025-01-01	1128.1	1120.5	1160.8	1200
2024-12-01	1089.2	1080.2	1160.8	1200
2024-11-01	1089.2	1080.2	1160.8	1200
2024-10-01	1119.1	1115.1	1160.8	1200
2024-09-01	1119.1	1115.1	1160.8	1200
2024-11-01	1142	1141.4	1160.8	1200
2024-07-01	1142	1141.4	1160.8	1200
2024-06-01	1134.2	1129.5	1160.8	1200
2024-05-01	1147	1141	1160.8	1200
2024-04-01	1148.5	1141	1178.4	1200
2024-03-01	1161.2	1151.4	1200	1200
2024-02-01	1149.8	1137.4	1200	1200

Comming soon.

Tournaments

History

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	Gauteng Inter-Region at Emerald Resort 2025 (U8+U10 Girls)	2025-12-06	2025-12-07	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
2	JMC Closed 2025 (U10)	2025-08-09	2025-08-09	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	Third Knight Riders Junior Open 2025 (U10)	2025-06-22	2025-06-22	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
4	West Rand Open 2.0 2025 (U10)	2025-06-07	2025-06-07	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
5	JMC Helpmekaar 2025 (U10)	2025-06-01	2025-06-01	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
6	JMC Crawford Sandton 2025 (U10)	2025-05-10	2025-05-10	Standard	Johannesburg Metro (GJM)	5	5	0	Yes	Analysis
7	South African Junior Closed Chess Championships 2025 (U8 Girls)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	4.5	Yes	Analysis
8	2025 Chris Greyling Open Chess Tournament (U10)	2025-03-15	2025-03-15	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
9	MCA Summer March 2025 (Newcomer)	2025-03-08	2025-03-08	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
10	JMC Kick Off 2025 (U10)	2025-02-02	2025-02-02	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
11	2025 Tshwane Chess OPEN Registration Tournament (U10)	2025-01-25	2025-01-25	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
12	Gauteng Inter-Region at UJ 2024 (U8 Mixed)	2024-12-06	2024-12-07	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
13	Gauteng Top Schools 2024 (U13 Girls)	2024-10-04	2024-10-04	Standard	Ekurhuleni (GE)	5	4	0.5	Yes	Analysis
14	Bojanala's FIDE In The Sparkling Waters 2024 (Young Junior Champs)	2024-08-17	2024-08-17	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
15	JMC Closed 2024 (U8)	2024-08-09	2024-08-09	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis
16	Second Knight Riders Juniors Open Chess Tournament 2024 (U8)	2024-06-08	2024-06-08	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
17	JMC Trinityhouse Little Falls 2024 (U8)	2024-06-02	2024-06-02	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
18	Chess Power House May Open 2024 (E)	2024-05-25	2024-05-25	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
19	JMC Crawford International Sandton 2024 (U8)	2024-05-11	2024-05-11	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis
20	JMC Helpmekaar Kollege Tournament 2024 (U8)	2024-05-04	2024-05-04	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis
21	Hermanus Chess Club Open 2024 (Development)	2024-04-20	2024-04-20	Rapid	Overberg (WOS)	7	7	3	Yes	Analysis
22	CPH St Andrew's Rapid 2024 (D)	2024-03-30	2024-03-30	Rapid	Ekurhuleni (GE)	5	5	2	Yes	Analysis
23	2024 Chris Greyling Open Chess Tournament (F)	2024-03-16	2024-03-16	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
24	2024 Tshwane Chess AHS Open Chess Tournament (F)	2024-02-24	2024-02-24	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
25	JMC Kick Off Tournament 2024 (U8)	2024-01-28	2024-01-28	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis

#	Games	Start				End
1	4	Tournament South African Junior Closed Chess Championships 2025				Tournament South African Junior Closed Chess Championships 2025
		date 2025-04-03	rnd 6	type Standard	result 1	date 2025-04-05	rnd 9	type Standard	result 1
		Opponent Skippers, D (Devedene)				Opponent De Swardt, R (Rebecca)
2	4	Tournament Gauteng Inter-Region at UJ 2024				Tournament Gauteng Inter-Region at UJ 2024
		date 2024-12-06	rnd 1	type Standard	result 1	date 2024-12-07	rnd 4	type Standard	result 1
		Opponent Retief, L (Luc)				Opponent Roux, M (Matthew)
3	4	Tournament Chess Power House May Open 2024				Tournament Chess Power House May Open 2024
		date 2024-05-25	rnd 2	type Standard	result 1	date 2024-05-25	rnd 5	type Standard	result 0.5
		Opponent Logan, I (Irvine)				Opponent Mabugu, R (Refilwe)

#	Games	Start				End
1	4	Tournament South African Junior Closed Chess Championships 2025				Tournament South African Junior Closed Chess Championships 2025
		date 2025-04-03	rnd 6	type Standard	result 1	date 2025-04-05	rnd 9	type Standard	result 1
		Opponent Skippers, D (Devedene)				Opponent De Swardt, R (Rebecca)
2	4	Tournament Gauteng Inter-Region at UJ 2024				Tournament Gauteng Inter-Region at UJ 2024
		date 2024-12-06	rnd 1	type Standard	result 1	date 2024-12-07	rnd 4	type Standard	result 1
		Opponent Retief, L (Luc)				Opponent Roux, M (Matthew)
3	4	Tournament Chess Power House May Open 2024				Tournament Chess Power House May Open 2024
		date 2024-05-25	rnd 2	type Standard	result 1	date 2024-05-25	rnd 5	type Standard	result 0.5
		Opponent Logan, I (Irvine)				Opponent Mabugu, R (Refilwe)

#	Games	Start				End
1	2	Tournament Hermanus Chess Club Open 2024				Tournament Hermanus Chess Club Open 2024
		date 2024-04-20	rnd 6	type Rapid	result 1	date 2024-04-20	rnd 7	type Rapid	result 1
		Opponent Mkhapheni, A (Ayakha)				Opponent Truter, J (Jake)
2	2	Tournament CPH St Andrew's Rapid 2024				Tournament CPH St Andrew's Rapid 2024
		date 2024-03-30	rnd 3	type Rapid	result 1	date 2024-03-30	rnd 4	type Rapid	result 1
		Opponent Peter, B (Bulumko)				Opponent Pistorius, A (Anja)
3	1	Tournament Hermanus Chess Club Open 2024				Tournament Hermanus Chess Club Open 2024
		date 2024-04-20	rnd 2	type Rapid	result 1	date 2024-04-20	rnd 2	type Rapid	result 1
		Opponent Davids, N (Noah)				Opponent Davids, N (Noah)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Gauteng Inter-Region at UJ 2024				Tournament Gauteng Inter-Region at UJ 2024
		date 2024-12-06	rnd 1	type Standard	result 1	date 2024-12-07	rnd 4	type Standard	result 1
		Opponent Retief, L (Luc)				Opponent Roux, M (Matthew)
2	4	Tournament 2024 Tshwane Chess AHS Open Chess Tournament				Tournament 2024 Chris Greyling Open Chess Tournament
		date 2024-02-24	rnd 4	type Standard	result 1	date 2024-03-16	rnd 2	type Standard	result 1
		Opponent Haupt, D (Dawid)				Opponent Muller, L (Limay)
3	3	Tournament JMC Helpmekaar 2025				Tournament West Rand Open 2.0 2025
		date 2025-06-01	rnd 4	type Standard	result 1	date 2025-06-07	rnd 1	type Standard	result 1
		Opponent Lochner, C (Calitz)				Opponent Seome, K (Keotshepa)

#	Games	Start				End
1	4	Tournament Gauteng Inter-Region at UJ 2024				Tournament Gauteng Inter-Region at UJ 2024
		date 2024-12-06	rnd 1	type Standard	result 1	date 2024-12-07	rnd 4	type Standard	result 1
		Opponent Retief, L (Luc)				Opponent Roux, M (Matthew)
2	4	Tournament 2024 Tshwane Chess AHS Open Chess Tournament				Tournament 2024 Chris Greyling Open Chess Tournament
		date 2024-02-24	rnd 4	type Standard	result 1	date 2024-03-16	rnd 2	type Standard	result 1
		Opponent Haupt, D (Dawid)				Opponent Muller, L (Limay)
3	3	Tournament JMC Helpmekaar 2025				Tournament West Rand Open 2.0 2025
		date 2025-06-01	rnd 4	type Standard	result 1	date 2025-06-07	rnd 1	type Standard	result 1
		Opponent Lochner, C (Calitz)				Opponent Seome, K (Keotshepa)

#	Games	Start				End
1	2	Tournament Hermanus Chess Club Open 2024				Tournament Hermanus Chess Club Open 2024
		date 2024-04-20	rnd 6	type Rapid	result 1	date 2024-04-20	rnd 7	type Rapid	result 1
		Opponent Mkhapheni, A (Ayakha)				Opponent Truter, J (Jake)
2	2	Tournament CPH St Andrew's Rapid 2024				Tournament CPH St Andrew's Rapid 2024
		date 2024-03-30	rnd 3	type Rapid	result 1	date 2024-03-30	rnd 4	type Rapid	result 1
		Opponent Peter, B (Bulumko)				Opponent Pistorius, A (Anja)
3	1	Tournament Hermanus Chess Club Open 2024				Tournament Hermanus Chess Club Open 2024
		date 2024-04-20	rnd 2	type Rapid	result 1	date 2024-04-20	rnd 2	type Rapid	result 1
		Opponent Davids, N (Noah)				Opponent Davids, N (Noah)

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
		Gms	Aor	Prat	Gms	Aor	Prat	Gms	Aor	Prat	Gms	Aor	Prat
1	Mabugu ,R (Refilwe)	4	1.5	-106.2	4	1.5	-106.2	0	0	0	0	0	0
1	Mabugu ,R (Refilwe)	4	1128.4	1022.2	4	1118.1	1022.2	0	0	0	0	0	0
2	Malemane ,A (Atlehang Faith)	4	1	-212.5	4	1	-212.5	0	0	0	0	0	0
2	Malemane ,A (Atlehang Faith)	4	1324.3	1111.8	4	1341.2	1111.8	0	0	0	0	0	0
3	Stelloh ,A (Alexander)	4	0	-425	3	0	-425	1	0	-425	0	0	0
3	Stelloh ,A (Alexander)	4	1369.3	944.3	3	1392.8	944.3	1	1213.6	944.3	0	0	0
4	Kgwale ,K (Keratilwe)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
4	Kgwale ,K (Keratilwe)	3	1300.5	1158.8	3	1305.9	1158.8	0	0	0	0	0	0
5	Lochner ,C (Calitz)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
5	Lochner ,C (Calitz)	3	1235.9	1094.2	3	1234.7	1094.2	0	0	0	0	0	0
6	Bekker ,J (Jacobus)	3	0	-425	3	0	-425	0	0	0	0	0	0
6	Bekker ,J (Jacobus)	3	1254.3	829.3	3	1244.3	829.3	0	0	0	0	0	0
7	Ramonyai ,M (Mbhekeni)	2	1	0	2	1	0	0	0	0	0	0	0
7	Ramonyai ,M (Mbhekeni)	2	1376.4	1376.4	2	1369.2	1376.4	0	0	0	0	0	0
8	Sehularo ,T (Taonga Kgantsho)	2	2	425	2	2	425	0	0	0	0	0	0
8	Sehularo ,T (Taonga Kgantsho)	2	971	1395.9	2	948.4	1395.9	0	0	0	0	0	0
9	Sahoo ,S (Shaurya)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Sahoo ,S (Shaurya)	2	1282.1	857.1	2	1280.1	857.1	0	0	0	0	0	0
10	Deysel ,Z (Zachariah)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Deysel ,Z (Zachariah)	2	1276.9	851.9	2	1279.4	851.9	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

Notifications

PLAYER PAGE

Personal

Joubert, Z (Zani)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms