Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Klerk, O (Oliver)

Chess SA id

1150143864

FIDE id

Date of birth

2015-04-30 (U12)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-15

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1144.7

Item	Main	Standard	Rapid	Blitz
Rating	1178.1	1175.9	1200	1200
Raw rating	1178.1	1175.9	1200	1200
Weighted rating	1168	1163.9	1200	1200
Weighted performance	999.1	997.9	0	0
Floor	733.8	733.2	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	171.1	171.6	165.8	165.8
Highest rating	1247 2023-08-01	1246.4 2023-08-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1233.8 2023-10-01	1233.2 2023-10-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1233.8 2018-10-01	1233.2 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1247 2023-08-01	1246.4 2023-08-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1178.1	1175.9	1200	1200
Analysis
Rating	1178.1	1175.9	1200	1200
Raw rating	1178.1	1175.9	1200	1200
Weighted rating	1168	1163.9	1200
Weighted performance	999.1	997.9	0
K-factor	36	36	36	36
Floor	733.8	733.2	700	700
Max/Min rating change allowed	171.1	171.6	165.8	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	1178.1	1175.9	1200	1200
New weighted rating	1168.1	1164.1	1200	1200
New weighted performance	998.8	997.5	0	0
Temp new rating	1178.1	1175.9	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1178.1	1175.9	1200	1200
New K-factor	36	36	36	36
New floor	733.8	733.2	700	700

Item	Main	Standard
	0	0
	5	5
	46	46
	37	37
	10	10
	0	0
History	98	98

Games since
	Main 51	Standard 51		Rapid 0		Blitz 0
Gender	Male
Age group	U12
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	4150		1325		472
Male	3095		1003		355
U12	708		218		82
U12 Male	480		153		55
Standard
	RSA		Province		Region
Overall	4099		1428		555
Male	3047		1084		420
U12	672		234		93
U12 Male	459		164		61
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-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	5	2.5	50	0	1197	1197
Standard	5	2.5	50	0	1197	1197
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	98	40	40.82	-78.1	1226.4	1148.4
Standard	98	40	40.82	-78.1	1226.4	1148.4
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1178.1	1175.9	1200	1200
2025-09-01	1178.1	1175.9	1200	1200
2025-08-01	1172.6	1168.6	1200	1200
2025-07-01	1172.6	1168.6	1200	1200
2025-06-01	1172.6	1168.6	1200	1200
2025-05-01	1172.6	1168.6	1200	1200
2025-04-01	1172.6	1168.6	1200	1200
2025-03-01	1172.6	1168.6	1200	1200
2025-02-01	1168.6	1164.3	1200	1200
2025-01-01	1105.6	1097.8	1200	1200
2024-12-01	1117.4	1108.2	1200	1200
2024-11-01	1117.4	1108.2	1200	1200
2024-10-01	1117.4	1108.2	1200	1200
2024-09-01	1174.3	1168.3	1200	1200
2024-08-01	1213.7	1216.5	1200	1200
2024-07-01	1198.8	1198.9	1200	1200
2024-06-01	1198.8	1198.9	1200	1200
2024-08-01	1198.8	1198.9	1200	1200
2024-04-01	1177.6	1173	1200	1200
2024-03-01	1183.9	1178.8	1200	1200
2024-02-01	1190.8	1186.4	1200	1200
2024-01-01	1233.8	1233.2	1200	1200
2023-12-01	1233.8	1233.2	1200	1200
2023-11-01	1233.8	1233.2	1200	1200

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane South School District CLOSED League Championship (U11B)	2025-08-15	2025-08-15	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane South School District CLOSED League Championship (U11B)	2025-08-15	2025-08-15	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
2	Gauteng Inter-Region at UJ 2024 (U10 Candidates)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
3	2024 Etienne Lewis (U10)	2024-08-30	2024-09-01	Standard	Tshwane (GTP)	7	7	1.5	Yes	Analysis
4	D4 Tshwane South District Schools Teams Chess Tournament 2024 (U9A)	2024-08-03	2024-08-03	Standard	Tshwane (GTP)	5	5	0.5	Yes	Analysis
5	Menlopark Open Chess Tournament 2024 (U10)	2024-07-13	2024-07-13	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
6	2024 Milos Ristic Open Chess Tournament (U10)	2024-04-27	2024-04-27	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
7	2024 Lubowski Open Chess Tournament (D2)	2024-03-23	2024-03-24	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
8	2024 Wynie Robbertse Chess Tournament (E)	2024-03-02	2024-03-02	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
9	2024 Blou Bul Open Chess Tournament (D)	2024-02-10	2024-02-10	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
10	2024 Gauteng Inter-Region Chess Championship (U10B)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	4	1	Yes	Analysis
11	2023 Gauteng Top Schools (U9 Mixed)	2023-08-18	2023-08-18	Standard	West Rand (GWR)	5	5	4	Yes	Analysis
12	2023 Etienne Lewis Closed Tournament (U10)	2023-08-25	2023-08-27	Standard	Tshwane (GTP)	7	7	2	Yes	Analysis
13	2023 Tshwane South School District CLOSED League Championship (U9)	2023-07-29	2023-07-29	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
14	2023 Menlo Open Tournament (E)	2023-07-22	2023-07-22	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
15	2023 Elize Steenkamp Open Tournament (E)	2023-06-16	2023-06-16	Standard	Tshwane (GTP)	6	6	3	Yes	Analysis
16	Silver Lakes Open Chess Tournament (E)	2023-04-15	2023-04-15	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
17	Laerskool Constantiapark Open Chess Tournament 2023 (U10)	2023-02-18	2023-02-18	Standard	Tshwane (GTP)	5	4	1	Yes	Analysis
18	Lardies Tournament 2022 (U8)	2022-10-29	2022-10-29	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
19	2022 Menlo Open Tournament (F)	2022-07-23	2022-07-23	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis

#	Games	Start				End
1	6	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Gauteng Top Schools
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-08-18	rnd 4	type Standard	result 1
		Opponent Oosthuizen, V (Vaughn)				Opponent Chaves, X (Xavier)
2	4	Tournament 2023 Elize Steenkamp Open Tournament				Tournament 2023 Menlo Open Tournament
		date 2023-06-16	rnd 5	type Standard	result 0.5	date 2023-07-22	rnd 2	type Standard	result 1
		Opponent Mathabathe, K (Kgosi)				Opponent Stelloh, A (Alexander)
3	3	Tournament 2022 Menlo Open Tournament				Tournament 2022 Menlo Open Tournament
		date 2022-07-23	rnd 2	type Standard	result 0.5	date 2022-07-23	rnd 4	type Standard	result 0.5
		Opponent Du Plessis, A (Anya)				Opponent Coetzee, A (Adriaan)

#	Games	Start				End
1	6	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Gauteng Top Schools
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-08-18	rnd 4	type Standard	result 1
		Opponent Oosthuizen, V (Vaughn)				Opponent Chaves, X (Xavier)
2	4	Tournament 2023 Elize Steenkamp Open Tournament				Tournament 2023 Menlo Open Tournament
		date 2023-06-16	rnd 5	type Standard	result 0.5	date 2023-07-22	rnd 2	type Standard	result 1
		Opponent Mathabathe, K (Kgosi)				Opponent Stelloh, A (Alexander)
3	3	Tournament 2022 Menlo Open Tournament				Tournament 2022 Menlo Open Tournament
		date 2022-07-23	rnd 2	type Standard	result 0.5	date 2022-07-23	rnd 4	type Standard	result 0.5
		Opponent Du Plessis, A (Anya)				Opponent Coetzee, A (Adriaan)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Gauteng Top Schools
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-08-18	rnd 4	type Standard	result 1
		Opponent Oosthuizen, V (Vaughn)				Opponent Chaves, X (Xavier)
2	2	Tournament Menlopark Open Chess Tournament 2024				Tournament Menlopark Open Chess Tournament 2024
		date 2024-07-13	rnd 4	type Standard	result 1	date 2024-07-13	rnd 5	type Standard	result 1
		Opponent Wang, Z (Zhihao)				Opponent Gauche, K (Kian)
3	2	Tournament 2024 Lubowski Open Chess Tournament				Tournament 2024 Lubowski Open Chess Tournament
		date 2024-03-23	rnd 2	type Standard	result 1	date 2024-03-23	rnd 3	type Standard	result 1
		Opponent Scholtz, I (Imke)				Opponent Gohain, S (Samhridhy)

#	Games	Start				End
1	6	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Gauteng Top Schools
		date 2023-07-29	rnd 4	type Standard	result 1	date 2023-08-18	rnd 4	type Standard	result 1
		Opponent Oosthuizen, V (Vaughn)				Opponent Chaves, X (Xavier)
2	2	Tournament Menlopark Open Chess Tournament 2024				Tournament Menlopark Open Chess Tournament 2024
		date 2024-07-13	rnd 4	type Standard	result 1	date 2024-07-13	rnd 5	type Standard	result 1
		Opponent Wang, Z (Zhihao)				Opponent Gauche, K (Kian)
3	2	Tournament 2024 Lubowski Open Chess Tournament				Tournament 2024 Lubowski Open Chess Tournament
		date 2024-03-23	rnd 2	type Standard	result 1	date 2024-03-23	rnd 3	type Standard	result 1
		Opponent Scholtz, I (Imke)				Opponent Gohain, S (Samhridhy)

No games found.

#	Games	Start				End

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	Wolvaardt ,J (Jonathan)	4	0	-425	4	0	-425	0	0	0	0	0	0
1	Wolvaardt ,J (Jonathan)	4	1321	896	4	1323.3	896	0	0	0	0	0	0
2	De Beer ,L (Lily)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
2	De Beer ,L (Lily)	3	1063.9	1205.6	3	1049.5	1205.6	0	0	0	0	0	0
3	Jansen Van Vuuren ,G (Griffin)	2	2	425	2	2	425	0	0	0	0	0	0
3	Jansen Van Vuuren ,G (Griffin)	2	1118	1543	2	1108.9	1543	0	0	0	0	0	0
4	Simao ,A (Arya)	2	1	0	2	1	0	0	0	0	0	0	0
4	Simao ,A (Arya)	2	1167.6	1167.6	2	1163.4	1167.6	0	0	0	0	0	0
5	Malan ,D (Divan)	2	2	425	2	2	425	0	0	0	0	0	0
5	Malan ,D (Divan)	2	1163.4	1588.4	2	1159.5	1588.4	0	0	0	0	0	0
6	Kleynhans ,M (Magnus)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Kleynhans ,M (Magnus)	2	1268.7	843.7	2	1274.8	843.7	0	0	0	0	0	0
7	Mabuza ,O (Oluhle)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Mabuza ,O (Oluhle)	2	1193.1	768.1	2	1190.8	768.1	0	0	0	0	0	0
8	Langeveldt ,R (Reynardt)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Langeveldt ,R (Reynardt)	2	1252.1	827.1	2	1260.4	827.1	0	0	0	0	0	0
9	Minny ,L (Lunka)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Minny ,L (Lunka)	2	1211.1	786.1	2	1208.1	786.1	0	0	0	0	0	0
10	Rahlaga ,K (Kaelo Alupheli)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Rahlaga ,K (Kaelo Alupheli)	2	1246.5	821.5	2	1245.9	821.5	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

De Klerk, O (Oliver)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms