Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Klerk, AJ (Abraham Jacobus)

Chess SA id

108078407

FIDE id

Date of birth

2008-05-17 (U18)

Gender

Male

Region

Bojanala Platina (NBR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2020-03-14

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1140.8	1125.9	719.4	719.4
Raw rating	1140.8	1125.9	719.4	719.4
Weighted rating	1140.8	1125.9	719.4	719.4
Weighted performance	328.7	325.1	0	0
Floor	707.7	692.3	500	500
K-factor	36	40	40	40
Min/Max rating change allowed	180.4	184.3	328.8	328.8
Highest rating	1220.3 2019-06-01	1204.7 2019-06-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1207.7 2019-07-01	1192.3 2019-07-01	719.4 2024-02-01	719.4 2024-02-01
Highest weighted rating	1207.7 2024-11-01	1192.3 2024-11-01	719.4 2024-11-01	719.4 2024-11-01
Highest weighted performance	1220.3 2019-06-01	1204.7 2019-06-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1140.8	1125.9	719.4	719.4
Analysis
Rating	1140.8	1125.9	719.4	719.4
Raw rating	1140.8	1125.9	719.4	719.4
Weighted rating	1140.8	1125.9	719.4
Weighted performance	328.7	325.1	0
K-factor	36	40	40	40
Floor	707.7	692.3	500	500
Max/Min rating change allowed	180.4	184.3	328.8	328.8
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	1140.8	1125.9	719.4	719.4
New weighted rating	1140.8	1125.9	719.4	719.4
New weighted performance	328.3	324.7	0	0
Temp new rating	1140.8	1125.9	719.4	719.4
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1140.8	1125.9	719.4	719.4
New K-factor	36	40	40	40
New floor	707.7	692.3	500	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	200	195	5

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Bojanala Platina (NBR)
Province	Northwest (NW)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	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	108	52	48.15	-15.7	978.5	962.8
Standard	108	52	48.15	-15.7	978.5	962.8
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1140.8	1125.9	719.4	719.4
2025-09-01	1140.8	1125.9	719.4	719.4
2025-08-01	1140.8	1125.9	719.4	719.4
2025-07-01	1140.8	1125.9	719.4	719.4
2025-06-01	1140.8	1125.9	719.4	719.4
2025-05-01	1140.8	1125.9	719.4	719.4
2025-04-01	1140.8	1125.9	719.4	719.4
2025-03-01	1140.8	1125.9	719.4	719.4
2025-02-01	1140.8	1125.9	719.4	719.4
2025-01-01	1140.8	1125.9	719.4	719.4
2024-12-01	1140.8	1125.9	719.4	719.4
2024-11-01	1140.8	1125.9	719.4	719.4
2024-10-01	1140.8	1125.9	719.4	719.4
2024-09-01	1140.8	1125.9	719.4	719.4
2024-08-01	1140.8	1125.9	719.4	719.4
2024-07-01	1140.8	1125.9	719.4	719.4
2024-06-01	1140.8	1125.9	719.4	719.4
2024-08-01	1140.8	1125.9	719.4	719.4
2024-04-01	1140.8	1125.9	719.4	719.4
2024-03-01	1140.8	1125.9	719.4	719.4
2024-02-01	1140.8	1125.9	719.4	719.4
2024-01-01	1140.8	1125.9	719.4	719.4
2023-12-01	1140.8	1125.9	719.4	719.4
2023-11-01	1140.8	1125.9	719.4	719.4

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	Hoerskool Brits Toernooi 2020 (U14)	2020-03-14	2020-03-14	Standard	Bojanala Platina (NBR)	5	4	2	Yes	Analysis
2	Laerskool Proteapark 2020 (B)	2020-02-29	2020-02-29	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
3	2019 South African Junior Team Championships (U12B)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	6	1	Yes	Analysis
4	Inter Region 2019 (U12 Open)	2019-10-19	2019-10-19	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
5	Lebone II 2019 (U12)	2019-09-14	2019-09-14	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
6	Laerskool Brits 2019 (U12)	2019-08-31	2019-08-31	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
7	Laerskool Rustenburg 2019 (U12)	2019-08-17	2019-08-17	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
8	Grenville 2019 (U12)	2019-06-08	2019-06-08	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
9	2019 RMS Laerskole (U11)	2019-06-01	2019-06-01	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
10	Inter Regional Chess Championship 2019 (U12)	2019-05-10	2019-05-11	Standard	Mangaung (FMB)	5	5	3	Yes	Analysis
11	Laerskool Olienpark 2019 (U12)	2019-04-06	2019-04-06	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
12	Hoerskool Rustenburg Skaak 2019 (U12)	2019-04-13	2019-04-13	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
13	Hoerskool Brits Tournament 2019 (U12)	2019-02-09	2019-02-09	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
14	South African Junior Team Championships 2018 (U12C)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	3	Yes	Analysis
15	Bojanala Regionals 2018 (U12)	2018-09-15	2018-09-15	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
16	Laerskool Brits Tournament 2018 (U12)	2018-08-04	2018-08-04	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
17	Laerskool Proteapark Chess 2018 (D)	2018-05-19	2018-05-19	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
18	Laerskool Olienpark 2018 (U12)	2018-04-21	2018-04-21	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
19	Hoerskool Brits 2018 (U12)	2018-03-17	2018-03-17	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
20	Laerskool Vastrap 2018 (U12)	2018-02-03	2018-02-03	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
21	South African Junior Team Championships 2017 (U10B)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	2	Yes	Analysis

#	Games	Start				End
1	4	Tournament 2019 RMS Laerskole				Tournament Grenville 2019
		date 2019-06-01	rnd 5	type Standard	result 1	date 2019-06-08	rnd 3	type Standard	result 1
		Opponent Gulume, J (Jayden)				Opponent Morake, O (Orefile)
2	4	Tournament Inter Regional Chess Championship 2019				Tournament 2019 RMS Laerskole
		date 2019-05-11	rnd 5	type Standard	result 1	date 2019-06-01	rnd 3	type Standard	result 1
		Opponent Makine, L (Lebogang)				Opponent Sayers, E (Elijah Arthur)
3	3	Tournament Inter Region 2019				Tournament Inter Region 2019
		date 2019-10-19	rnd 1	type Standard	result 1	date 2019-10-19	rnd 3	type Standard	result 1
		Opponent Pedersen, J (Jj)				Opponent Byliefeldt, L (Leroux)

#	Games	Start				End
1	4	Tournament 2019 RMS Laerskole				Tournament Grenville 2019
		date 2019-06-01	rnd 5	type Standard	result 1	date 2019-06-08	rnd 3	type Standard	result 1
		Opponent Gulume, J (Jayden)				Opponent Morake, O (Orefile)
2	4	Tournament Inter Regional Chess Championship 2019				Tournament 2019 RMS Laerskole
		date 2019-05-11	rnd 5	type Standard	result 1	date 2019-06-01	rnd 3	type Standard	result 1
		Opponent Makine, L (Lebogang)				Opponent Sayers, E (Elijah Arthur)
3	3	Tournament Inter Region 2019				Tournament Inter Region 2019
		date 2019-10-19	rnd 1	type Standard	result 1	date 2019-10-19	rnd 3	type Standard	result 1
		Opponent Pedersen, J (Jj)				Opponent Byliefeldt, L (Leroux)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament 2019 RMS Laerskole				Tournament Grenville 2019
		date 2019-06-01	rnd 5	type Standard	result 1	date 2019-06-08	rnd 3	type Standard	result 1
		Opponent Gulume, J (Jayden)				Opponent Morake, O (Orefile)
2	4	Tournament Inter Regional Chess Championship 2019				Tournament 2019 RMS Laerskole
		date 2019-05-11	rnd 5	type Standard	result 1	date 2019-06-01	rnd 3	type Standard	result 1
		Opponent Makine, L (Lebogang)				Opponent Sayers, E (Elijah Arthur)
3	3	Tournament Inter Region 2019				Tournament Inter Region 2019
		date 2019-10-19	rnd 1	type Standard	result 1	date 2019-10-19	rnd 3	type Standard	result 1
		Opponent Pedersen, J (Jj)				Opponent Byliefeldt, L (Leroux)

#	Games	Start				End
1	4	Tournament 2019 RMS Laerskole				Tournament Grenville 2019
		date 2019-06-01	rnd 5	type Standard	result 1	date 2019-06-08	rnd 3	type Standard	result 1
		Opponent Gulume, J (Jayden)				Opponent Morake, O (Orefile)
2	4	Tournament Inter Regional Chess Championship 2019				Tournament 2019 RMS Laerskole
		date 2019-05-11	rnd 5	type Standard	result 1	date 2019-06-01	rnd 3	type Standard	result 1
		Opponent Makine, L (Lebogang)				Opponent Sayers, E (Elijah Arthur)
3	3	Tournament Inter Region 2019				Tournament Inter Region 2019
		date 2019-10-19	rnd 1	type Standard	result 1	date 2019-10-19	rnd 3	type Standard	result 1
		Opponent Pedersen, J (Jj)				Opponent Byliefeldt, L (Leroux)

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	Difotso ,LR (Lebogang Rotondwa)	5	1	-255	5	1	-255	0	0	0	0	0	0
1	Difotso ,LR (Lebogang Rotondwa)	5	1225.9	970.9	5	1215	970.9	0	0	0	0	0	0
2	Diale ,O (Ompile)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
2	Diale ,O (Ompile)	4	944.2	1156.7	4	928.5	1156.7	0	0	0	0	0	0
3	Van Der Walt ,JHT (Jean Hendrik T)	3	0	-425	3	0	-425	0	0	0	0	0	0
3	Van Der Walt ,JHT (Jean Hendrik T)	3	1199.8	774.8	3	1198.5	774.8	0	0	0	0	0	0
4	Byliefeldt ,L (Leroux)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
4	Byliefeldt ,L (Leroux)	3	1326.9	1468.5	3	1318.6	1468.5	0	0	0	0	0	0
5	Mostert ,GS (Gideon Smit)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
5	Mostert ,GS (Gideon Smit)	3	879	737.3	3	880.2	737.3	0	0	0	0	0	0
6	Nke ,RB (Rebaone Bokang)	3	0	-425	3	0	-425	0	0	0	0	0	0
6	Nke ,RB (Rebaone Bokang)	3	909.5	484.5	3	905.5	484.5	0	0	0	0	0	0
7	Morake ,O (Orefile)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
7	Morake ,O (Orefile)	3	1153.9	1012.3	3	1151.5	1012.3	0	0	0	0	0	0
8	Redelinghuys ,G (Giano)	2	2	425	2	2	425	0	0	0	0	0	0
8	Redelinghuys ,G (Giano)	2	1163.7	1588.7	2	1151.8	1588.7	0	0	0	0	0	0
9	Melville ,J (Jason)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Melville ,J (Jason)	2	891.5	466.5	2	889.2	466.5	0	0	0	0	0	0
10	Myaka ,S (Silungile)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Myaka ,S (Silungile)	2	1010.7	585.7	2	1002.8	585.7	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

De Klerk, AJ (Abraham Jacobus)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms