Chess South Africa Ratings Database

PLAYER PAGE

Personal

Onyemah, C (Chioma)

Chess SA id

2080103444

FIDE id

Date of birth

2008-06-25 (U20)

Gender

Female

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2020-02-29

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1275.3	1265.1	1258.4	1200
Raw rating	1275.3	1265.1	1258.4	1200
Weighted rating	1275.3	1265.1	1258.4	1200
Weighted performance	330.3	329.1	0	0
Floor	798.6	788.9	758.4	700
K-factor	36	36	36	36
Min/Max rating change allowed	148.9	151.1	152.6	165.8
Highest rating	1306.2 2020-01-01	1295.3 2020-01-01	1464 2019-05-01	1200 2018-10-01
Highest raw rating	1298.6 2020-02-01	1288.9 2020-02-01	1258.4 2024-03-01	1200 2024-03-01
Highest weighted rating	1298.6 2022-01-01	1288.9 2022-01-01	1258.4 2024-03-01	1200 2018-10-01
Highest weighted performance	1306.2 2020-01-01	1295.3 2020-01-01	1464 2019-05-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1275.3	1265.1	1258.4	1200
Analysis
Rating	1275.3	1265.1	1258.4	1200
Raw rating	1275.3	1265.1	1258.4	1200
Weighted rating	1275.3	1265.1	1258.4
Weighted performance	330.3	329.1	0
K-factor	36	36	36	36
Floor	798.6	788.9	758.4	700
Max/Min rating change allowed	148.9	151.1	152.6	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	1275.3	1265.1	1258.4	1200
New weighted rating	1275.3	1265.1	1258.4	1200
New weighted performance	321.9	320.8	0	0
Temp new rating	1275.3	1265.1	1258.4	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1275.3	1265.1	1258.4	1200
New K-factor	36	36	36	36
New floor	798.6	788.9	758.4	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	92	87	5

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Female
Age group	U18
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 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	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	92	46.5	50.54	4.6	1162.2	1166.8
Standard	87	42.5	48.85	-9.8	1159.9	1150.1
Rapid	5	4	80	255	1202.4	1457.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1275.3	1265.1	1258.4	1200
2025-11-30	1275.3	1265.1	1258.4	1200
2025-11-01	1275.3	1265.1	1258.4	1200
2025-09-30	1275.3	1265.1	1258.4	1200
2025-09-01	1275.3	1265.1	1258.4	1200
2025-08-01	1275.3	1265.1	1258.4	1200
2025-07-01	1275.3	1265.1	1258.4	1200
2025-06-01	1275.3	1265.1	1258.4	1200
2025-05-01	1275.3	1265.1	1258.4	1200
2025-04-01	1275.3	1265.1	1258.4	1200
2025-03-01	1275.3	1265.1	1258.4	1200
2025-02-01	1275.3	1265.1	1258.4	1200
2025-01-01	1275.3	1265.1	1258.4	1200
2024-12-01	1275.3	1265.1	1258.4	1200
2024-11-01	1275.3	1265.1	1258.4	1200
2024-10-01	1275.3	1265.1	1258.4	1200
2024-09-01	1275.3	1265.1	1258.4	1200
2024-11-01	1275.3	1265.1	1258.4	1200
2024-07-01	1275.3	1265.1	1258.4	1200
2024-06-01	1275.3	1265.1	1258.4	1200
2024-05-01	1275.3	1265.1	1258.4	1200
2024-04-01	1275.3	1265.1	1258.4	1200
2024-03-01	1275.3	1265.1	1258.4	1200
2024-02-01	1275.3	1265.1	1258.4	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	JNW Club - Bryanston Open1 2020 (C)	2020-02-01	2020-02-01	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
2	Chessnuts 1 - 29 February 2020 (Kings)	2020-02-29	2020-02-29	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	2019 Wild Card Chess Championship (U12 Girls)	2020-01-09	2020-01-12	Standard	4 Knights (4K)	7	7	4.5	Yes	Analysis
4	2019 South African Junior Team Championships (U12 Girls)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	5	Yes	Analysis
5	Chessnuts November Tournament 2019 (Knights)	2019-11-08	2019-11-08	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
6	GJM vs GE Inter Region 2019 (U12 Reserve)	2019-10-05	2019-10-05	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
7	JNW Club - Maragon Open 2019 (C)	2019-08-03	2019-08-03	Standard	Johannesburg Metro (GJM)	5	5	1.5	Yes	Analysis
8	2019 Alekhine Open (C)	2019-08-09	2019-08-10	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
9	JHB Metro Closed 2019 (U12)	2019-07-27	2019-07-28	Standard	Johannesburg Metro (GJM)	6	6	3	Yes	Analysis
10	JNW Club - Hoerskool Linden 2019 (C)	2019-06-15	2019-06-15	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis
11	Fonties Challange 2019 (U11)	2019-06-08	2019-06-08	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
12	2019 Gauteng Primary Schools Individual Chess Championships (U11 Girls)	2019-05-25	2019-05-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
13	The Metro Open 2019 (Masters)	2019-05-25	2019-05-26	Standard	Johannesburg Metro (GJM)	6	4	1.5	Yes	Analysis
14	Gauteng D9 Finals 2019 (U11 Girls)	2019-05-19	2019-05-19	Rapid	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
15	JNW Club - Trinityhouse Little Falls Open 2019 (D)	2019-02-23	2019-02-23	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
16	JNW Club - Bryanston Open 1 2019 (D)	2019-01-26	2019-01-26	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
17	Boksburg Open 2019 (C)	2019-01-19	2019-01-19	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
18	GoForChess Grayston Junior Chess Championship 2018 (U12)	2018-06-10	2018-06-10	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis

#	Games	Start				End
1	4	Tournament 2019 South African Junior Team Championships				Tournament 2019 Wild Card Chess Championship
		date 2020-01-06	rnd 5	type Standard	result 1	date 2020-01-09	rnd 1	type Standard	result 1
		Opponent Pillay, M (Mishka)				Opponent Janssen, D (Danelle)
2	4	Tournament GJM vs GE Inter Region 2019				Tournament GJM vs GE Inter Region 2019
		date 2019-10-05	rnd 2	type Standard	result 1	date 2019-10-05	rnd 5	type Standard	result 1
		Opponent Mhambi, N (Nomsa)				Opponent Mhlakaza, O (Oko)
3	4	Tournament JHB Metro Closed 2019				Tournament JHB Metro Closed 2019
		date 2019-07-27	rnd 2	type Standard	result 0.5	date 2019-07-28	rnd 5	type Standard	result 1
		Opponent Viviers, C (Cara)				Opponent Pretorius, A (Arnold)

#	Games	Start				End
1	4	Tournament 2019 South African Junior Team Championships				Tournament 2019 Wild Card Chess Championship
		date 2020-01-06	rnd 5	type Standard	result 1	date 2020-01-09	rnd 1	type Standard	result 1
		Opponent Pillay, M (Mishka)				Opponent Janssen, D (Danelle)
2	4	Tournament GJM vs GE Inter Region 2019				Tournament GJM vs GE Inter Region 2019
		date 2019-10-05	rnd 2	type Standard	result 1	date 2019-10-05	rnd 5	type Standard	result 1
		Opponent Mhambi, N (Nomsa)				Opponent Mhlakaza, O (Oko)
3	4	Tournament JHB Metro Closed 2019				Tournament JHB Metro Closed 2019
		date 2019-07-27	rnd 2	type Standard	result 0.5	date 2019-07-28	rnd 5	type Standard	result 1
		Opponent Viviers, C (Cara)				Opponent Pretorius, A (Arnold)

#	Games	Start				End
1	3	Tournament Gauteng D9 Finals 2019				Tournament Gauteng D9 Finals 2019
		date 2019-05-19	rnd 3	type Rapid	result 1	date 2019-05-19	rnd 5	type Rapid	result 1
		Opponent Ditshego, K (Kedibone)				Opponent Mulovhedzi, H (Hope)
2	1	Tournament Gauteng D9 Finals 2019				Tournament Gauteng D9 Finals 2019
		date 2019-05-19	rnd 1	type Rapid	result 1	date 2019-05-19	rnd 1	type Rapid	result 1
		Opponent Morenyane, D (Dimpho)				Opponent Morenyane, D (Dimpho)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament 2019 South African Junior Team Championships				Tournament 2019 Wild Card Chess Championship
		date 2020-01-06	rnd 5	type Standard	result 1	date 2020-01-09	rnd 1	type Standard	result 1
		Opponent Pillay, M (Mishka)				Opponent Janssen, D (Danelle)
2	4	Tournament GJM vs GE Inter Region 2019				Tournament GJM vs GE Inter Region 2019
		date 2019-10-05	rnd 2	type Standard	result 1	date 2019-10-05	rnd 5	type Standard	result 1
		Opponent Mhambi, N (Nomsa)				Opponent Mhlakaza, O (Oko)
3	3	Tournament Chessnuts November Tournament 2019				Tournament 2019 South African Junior Team Championships
		date 2019-11-08	rnd 4	type Standard	result 1	date 2020-01-04	rnd 1	type Standard	result 1
		Opponent Deysel, H (Hannah)				Opponent Combrink, H (Helen)

#	Games	Start				End
1	4	Tournament 2019 South African Junior Team Championships				Tournament 2019 Wild Card Chess Championship
		date 2020-01-06	rnd 5	type Standard	result 1	date 2020-01-09	rnd 1	type Standard	result 1
		Opponent Pillay, M (Mishka)				Opponent Janssen, D (Danelle)
2	4	Tournament GJM vs GE Inter Region 2019				Tournament GJM vs GE Inter Region 2019
		date 2019-10-05	rnd 2	type Standard	result 1	date 2019-10-05	rnd 5	type Standard	result 1
		Opponent Mhambi, N (Nomsa)				Opponent Mhlakaza, O (Oko)
3	3	Tournament Chessnuts November Tournament 2019				Tournament 2019 South African Junior Team Championships
		date 2019-11-08	rnd 4	type Standard	result 1	date 2020-01-04	rnd 1	type Standard	result 1
		Opponent Deysel, H (Hannah)				Opponent Combrink, H (Helen)

#	Games	Start				End
1	3	Tournament Gauteng D9 Finals 2019				Tournament Gauteng D9 Finals 2019
		date 2019-05-19	rnd 3	type Rapid	result 1	date 2019-05-19	rnd 5	type Rapid	result 1
		Opponent Ditshego, K (Kedibone)				Opponent Mulovhedzi, H (Hope)
2	1	Tournament Gauteng D9 Finals 2019				Tournament Gauteng D9 Finals 2019
		date 2019-05-19	rnd 1	type Rapid	result 1	date 2019-05-19	rnd 1	type Rapid	result 1
		Opponent Morenyane, D (Dimpho)				Opponent Morenyane, D (Dimpho)

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	Naicker ,GC (Gabriel Christian)	3	0	-425	3	0	-425	0	0	0	0	0	0
1	Naicker ,GC (Gabriel Christian)	3	1308.4	883.4	3	1309.8	883.4	0	0	0	0	0	0
2	French ,D (Daniel)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	French ,D (Daniel)	2	1216.9	791.9	2	1217.6	791.9	0	0	0	0	0	0
3	Pillay ,M (Mishka)	2	1	0	2	1	0	0	0	0	0	0	0
3	Pillay ,M (Mishka)	2	1151.6	1151.6	2	1148.8	1151.6	0	0	0	0	0	0
4	De Villiers ,J (Juan)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
4	De Villiers ,J (Juan)	2	1156.8	1369.3	2	1146.7	1369.3	0	0	0	0	0	0
5	Morenyane ,D (Dimpho)	2	2	425	1	1	425	1	1	425	0	0	0
5	Morenyane ,D (Dimpho)	2	1200	1625	1	1200	1625	1	1200	1625	0	0	0
6	Vermaak ,T (Talita)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Vermaak ,T (Talita)	1	1128.7	703.7	1	1130.8	703.7	0	0	0	0	0	0
7	Swart ,L (Linzey)	1	1	425	1	1	425	0	0	0	0	0	0
7	Swart ,L (Linzey)	1	1187.8	1612.8	1	1185.1	1612.8	0	0	0	0	0	0
8	De Wet ,B (Brandon)	1	1	425	1	1	425	0	0	0	0	0	0
8	De Wet ,B (Brandon)	1	1274.5	1699.5	1	1317.7	1699.5	0	0	0	0	0	0
9	Smith ,L (Leyla)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Smith ,L (Leyla)	1	1151.2	726.2	1	1144.8	726.2	0	0	0	0	0	0
10	Sandenbergh ,RF (Francois)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Sandenbergh ,RF (Francois)	1	1082.5	657.5	1	1070.3	657.5	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Onyemah, C (Chioma)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms