Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Klerk, A (Antonie)

Chess SA id

1110109352

FIDE id

Date of birth

2011-04-06 (U16)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-10-18

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1355

Item	Main	Standard	Rapid	Blitz
Rating	1377.5	1376.2	1200	1200
Raw rating	1339.5	1355.5	1200	1200
Weighted rating	1219.9	1221	1200	1200
Weighted performance	1377.5	1376.2	0	0
Floor	839.5	855.5	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	135.9	132.9	165.8	165.8
Highest rating	1377.5 2025-11-01	1376.2 2025-11-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1339.5 2025-11-01	1355.5 2025-11-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1245.3 2018-10-01	1242.6 2018-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1377.5 2025-11-01	1376.2 2025-11-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-8.2	-8.2	0	0
New rating	1369.3	1367.9	1200	1200
Analysis
Rating	1377.5	1376.2	1200	1200
Raw rating	1339.5	1355.5	1200	1200
Weighted rating	1219.9	1221	1200
Weighted performance	1377.5	1376.2	0
K-factor	36	36	36	36
Floor	839.5	855.5	700	700
Max/Min rating change allowed	135.9	132.9	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	1339.5	1355.5	1200	1200
New weighted rating	1231.5	1233.9	1200	1200
New weighted performance	1369.3	1367.9	0	0
Temp new rating	1369.3	1367.9	1200	1200
Temp new rating +/-	-8.2	-8.2	0	0
Final new rating +/-	-8.2	-8.2	0	0
New rating	1369.3	1367.9	1200	1200
New K-factor	36	36	36	36
New floor	839.5	855.5	700	700

Item	Main	Standard
	0	0
	40	40
	0	0
	0	0
	0	0
	0	0
History	60	60

Games since
	Main 40	Standard 40		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	2419		849		306
Male	1952		676		240
U16	379		132		46
U16 Male	284		96		37
Standard
	RSA		Province		Region
Overall	2354		880		338
Male	1901		709		265
U16	367		132		52
U16 Male	278		100		42
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	40	23	57.5	63.8	1284.5	1348.3
Standard	40	23	57.5	63.8	1284.5	1348.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	60	32	53.33	28.3	1235	1263.3
Standard	60	32	53.33	28.3	1235	1263.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1339.5	1355.5	1200	1200
2025-09-30	1269.6	1271.6	1200	1200
2025-09-01	1269.6	1271.6	1200	1200
2025-08-01	1245.3	1242.6	1200	1200
2025-07-01	1245.3	1242.6	1200	1200
2025-06-01	1245.3	1242.6	1200	1200
2025-05-01	1232.3	1238.6	1200	1200
2025-04-01	1232.3	1238.6	1200	1200
2025-03-01	1232.3	1240.4	1200	1200
2025-02-01	1177.2	1178.3	1200	1200
2025-01-01	1156.9	1153.6	1200	1200
2024-12-01	1156.9	1153.6	1200	1200
2024-11-01	1156.9	1153.6	1200	1200
2024-10-01	1156.9	1153.6	1200	1200
2024-09-01	1156.9	1153.6	1200	1200
2024-08-01	1156.9	1153.6	1200	1200
2024-07-01	1156.9	1153.6	1200	1200
2024-09-01	1156.9	1153.6	1200	1200
2024-05-01	1156.9	1153.6	1200	1200
2024-04-01	1156.9	1153.6	1200	1200
2024-03-01	1156.9	1153.6	1200	1200
2024-02-01	1156.9	1153.6	1200	1200
2024-01-01	1156.9	1153.6	1200	1200
2023-12-01	1156.9	1153.6	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 Gauteng Top Schools Teams (U17)	2025-08-30	2025-08-30	Standard	Tshwane (GTP)	5	4	2	Yes	Analysis
2	Paarl Boys' High School Chess Festival 2025 (B)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
3	2025 Tshwane South School District CLOSED League Championship (U15A)	2025-08-16	2025-08-16	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
4	2025 Tshwane South School District Individual Finals (D4) (U15 Boys)	2025-05-10	2025-05-10	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
5	AHS Open Chess Tournament 2025 (D)	2025-03-01	2025-03-01	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
6	Grey College Team Championship 2025 (B)	2025-02-21	2025-02-22	Standard	Mangaung (FMB)	5	5	3.5	Yes	Analysis
7	Constantiapark Open 2025 (D)	2025-02-15	2025-02-15	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
8	2025 Tshwane Chess OPEN Registration Tournament (C)	2025-01-25	2025-01-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Gauteng Top Schools Teams (U17)	2025-08-30	2025-08-30	Standard	Tshwane (GTP)	5	4	2	Yes	Analysis
2	Paarl Boys' High School Chess Festival 2025 (B)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
3	2025 Tshwane South School District CLOSED League Championship (U15A)	2025-08-16	2025-08-16	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
4	2025 Tshwane South School District Individual Finals (D4) (U15 Boys)	2025-05-10	2025-05-10	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
5	AHS Open Chess Tournament 2025 (D)	2025-03-01	2025-03-01	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
6	Grey College Team Championship 2025 (B)	2025-02-21	2025-02-22	Standard	Mangaung (FMB)	5	5	3.5	Yes	Analysis
7	Constantiapark Open 2025 (D)	2025-02-15	2025-02-15	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
8	2025 Tshwane Chess OPEN Registration Tournament (C)	2025-01-25	2025-01-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
9	2019 Lardies Open (E)	2019-10-26	2019-10-26	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
10	2019 D4 Individual Finals (U9 Mixed)	2019-03-09	2019-03-09	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
11	2019 TuksChess Open (C)	2019-02-23	2019-02-23	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
12	2019 Constantia Park Open (E)	2019-02-09	2019-02-09	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis

#	Games	Start				End
1	5	Tournament 2025 Gauteng Top Schools Teams				Tournament Paarl Boys' High School Chess Festival 2025
		date 2025-08-30	rnd 4	type Standard	result 1	date 2025-10-17	rnd 3	type Standard	result 1
		Opponent Mametja, O (Obakeng)				Opponent Njenjesi, C (Chulumanco)
2	5	Tournament 2019 Lardies Open				Tournament 2025 Tshwane Chess OPEN Registration Tournament
		date 2019-10-26	rnd 2	type Standard	result 1	date 2025-01-25	rnd 1	type Standard	result 1
		Opponent Swanepoel, R (Richter)				Opponent Zhang, Y (Yufei)
3	4	Tournament AHS Open Chess Tournament 2025				Tournament 2025 Tshwane South School District Individual Finals (D4)
		date 2025-03-01	rnd 3	type Standard	result 0.5	date 2025-05-10	rnd 1	type Standard	result 1
		Opponent Focaraccio, C (Cai)				Opponent RAMOSHABA, T (TSHIRELETSO)

#	Games	Start				End
1	5	Tournament 2019 Lardies Open				Tournament 2025 Tshwane Chess OPEN Registration Tournament
		date 2019-10-26	rnd 2	type Standard	result 1	date 2025-01-25	rnd 1	type Standard	result 1
		Opponent Swanepoel, R (Richter)				Opponent Zhang, Y (Yufei)
2	4	Tournament AHS Open Chess Tournament 2025				Tournament 2025 Tshwane South School District Individual Finals (D4)
		date 2025-03-01	rnd 3	type Standard	result 0.5	date 2025-05-10	rnd 1	type Standard	result 1
		Opponent Focaraccio, C (Cai)				Opponent RAMOSHABA, T (TSHIRELETSO)
3	3	Tournament Grey College Team Championship 2025				Tournament Grey College Team Championship 2025
		date 2025-02-21	rnd 3	type Standard	result 1	date 2025-02-22	rnd 5	type Standard	result 1
		Opponent Boshoff, C (Chene)				Opponent Kingon, J (Jonah)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament AHS Open Chess Tournament 2025				Tournament 2025 Tshwane South School District Individual Finals (D4)
		date 2025-03-01	rnd 4	type Standard	result 1	date 2025-05-10	rnd 1	type Standard	result 1
		Opponent Van Wyngaard, G (George)				Opponent RAMOSHABA, T (TSHIRELETSO)
2	3	Tournament Constantiapark Open 2025				Tournament Grey College Team Championship 2025
		date 2025-02-15	rnd 4	type Standard	result 1	date 2025-02-21	rnd 1	type Standard	result 1
		Opponent Coetzer, J (Jeann-Louis)				Opponent Ngowi, L (Leo)
3	3	Tournament 2019 Lardies Open				Tournament 2019 Lardies Open
		date 2019-10-26	rnd 2	type Standard	result 1	date 2019-10-26	rnd 4	type Standard	result 1
		Opponent Swanepoel, R (Richter)				Opponent Janse Van Rensburg, LA (Leander)

#	Games	Start				End
1	3	Tournament AHS Open Chess Tournament 2025				Tournament 2025 Tshwane South School District Individual Finals (D4)
		date 2025-03-01	rnd 4	type Standard	result 1	date 2025-05-10	rnd 1	type Standard	result 1
		Opponent Van Wyngaard, G (George)				Opponent RAMOSHABA, T (TSHIRELETSO)
2	3	Tournament Constantiapark Open 2025				Tournament Grey College Team Championship 2025
		date 2025-02-15	rnd 4	type Standard	result 1	date 2025-02-21	rnd 1	type Standard	result 1
		Opponent Coetzer, J (Jeann-Louis)				Opponent Ngowi, L (Leo)
3	3	Tournament 2019 Lardies Open				Tournament 2019 Lardies Open
		date 2019-10-26	rnd 2	type Standard	result 1	date 2019-10-26	rnd 4	type Standard	result 1
		Opponent Swanepoel, R (Richter)				Opponent Janse Van Rensburg, LA (Leander)

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	Kock ,L (Luca)	2	0	-425	2	0	-425	0	0	0	0	0	0
1	Kock ,L (Luca)	2	1508.7	1083.7	2	1510.8	1083.7	0	0	0	0	0	0
2	Focaraccio ,C (Cai)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
2	Focaraccio ,C (Cai)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
3	Mmakou ,L (Lesedi)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Mmakou ,L (Lesedi)	1	1658.3	1233.3	1	1656.5	1233.3	0	0	0	0	0	0
4	Du Toit ,U (Ulrike)	1	1	425	1	1	425	0	0	0	0	0	0
4	Du Toit ,U (Ulrike)	1	1172	1597	1	1166.6	1597	0	0	0	0	0	0
5	Attfield ,N (Neesha)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Attfield ,N (Neesha)	1	1200	775	1	1200	775	0	0	0	0	0	0
6	Senekal ,W (William)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Senekal ,W (William)	1	985.4	560.4	1	978.4	560.4	0	0	0	0	0	0
7	RAMOSHABA ,T (TSHIRELETSO)	1	1	425	1	1	425	0	0	0	0	0	0
7	RAMOSHABA ,T (TSHIRELETSO)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
8	De Jager ,J (Jandre)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	De Jager ,J (Jandre)	1	1358.2	933.2	1	1363.3	933.2	0	0	0	0	0	0
9	Karsten ,D (Daniel)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Karsten ,D (Daniel)	1	1266.3	841.3	1	1264	841.3	0	0	0	0	0	0
10	Bogaard ,FK (Franco Konrad)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Bogaard ,FK (Franco Konrad)	1	1388.2	963.2	1	1375.5	963.2	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, A (Antonie)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms