Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Klerk, J (Jason)

Chess SA id

1090096276

FIDE id

Date of birth

2009-11-11 (U18)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-06-03

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1271.4	1186.7	1356.7	1094.6
Raw rating	1271.4	1186.7	1356.7	1094.6
Weighted rating	1271.1	1186.3	1356.7	1094.5
Weighted performance	822	462.6	879.5	350.1
Floor	829.4	785.7	856.7	700
K-factor	36	36	36	36
Min/Max rating change allowed	149.8	169	132.6	192.7
Highest rating	1329.4 2023-06-01	1352.3 2018-03-01	1462.5 2018-06-01	1200 2018-02-01
Highest raw rating	1329.4 2023-06-01	1285.7 2019-05-01	1356.7 2024-02-01	1200 2018-02-01
Highest weighted rating	1329.4 2023-06-01	1285.7 2019-05-01	1356.7 2025-04-01	1200 2018-02-01
Highest weighted performance	1281.2 2019-04-01	1352.3 2018-03-01	1462.5 2018-06-01	1200 2024-12-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1271.4	1186.7	1356.7	1094.6
Analysis
Rating	1271.4	1186.7	1356.7	1094.6
Raw rating	1271.4	1186.7	1356.7	1094.6
Weighted rating	1271.1	1186.3	1356.7
Weighted performance	822	462.6	879.5
K-factor	36	36	36	36
Floor	829.4	785.7	856.7	700
Max/Min rating change allowed	149.8	169	132.6	192.7
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	1271.4	1186.7	1356.7	1094.6
New weighted rating	1271.1	1186.3	1356.7	1094.5
New weighted performance	821.6	462.2	879	349.7
Temp new rating	1271.4	1186.7	1356.7	1094.6
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1271.4	1186.7	1356.7	1094.6
New K-factor	36	36	36	36
New floor	829.4	785.7	856.7	700

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	0	0	0	0
	0	0	0	0
	15	5	5	5
	10	0	10	0
	11	0	11	0
History	143	54	58	31

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	West Coast (WCU)
Province	Western Cape (WC)
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	143	79.5	55.59	47.6	1208.9	1256.5
Standard	54	30.5	56.48	55.1	1194.2	1249.3
Rapid	58	36.5	62.93	109.9	1218.9	1328.8
Blitz	31	12.5	40.32	-82.3	1215.8	1133.6

Date	Main	Standard	Rapid	Blitz
2025-09-30	1271.4	1186.7	1356.7	1094.6
2025-09-01	1271.4	1186.7	1356.7	1094.6
2025-08-01	1271.4	1186.7	1356.7	1094.6
2025-07-01	1271.4	1186.7	1356.7	1094.6
2025-06-01	1271.4	1186.7	1356.7	1094.6
2025-05-01	1271.4	1186.7	1356.7	1094.6
2025-04-01	1271.4	1186.7	1356.7	1094.6
2025-03-01	1271.4	1186.7	1356.7	1094.6
2025-02-01	1271.4	1186.7	1356.7	1094.6
2025-01-01	1270.6	1185.7	1356.7	1094.4
2024-12-01	1270.6	1185.7	1356.7	1094.4
2024-11-01	1270.6	1185.7	1356.7	1094.4
2024-10-01	1270.6	1185.7	1356.7	1094.4
2024-09-01	1270.6	1185.7	1356.7	1094.4
2024-08-01	1270.6	1185.7	1356.7	1094.4
2024-07-01	1270.6	1185.7	1356.7	1094.4
2024-06-01	1270.6	1185.7	1356.7	1094.4
2024-08-01	1270.6	1185.7	1356.7	1094.4
2024-04-01	1270.6	1185.7	1356.7	1094.4
2024-03-01	1270.6	1185.7	1356.7	1094.4
2024-02-01	1270.6	1185.7	1356.7	1094.4
2024-01-01	1270.6	1185.7	1356.7	1094.4
2023-12-01	1270.6	1185.7	1356.7	1094.4
2023-11-01	1270.6	1185.7	1356.7	1094.4

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	West Coast Open 2023 (Elite)	2023-05-20	2023-06-03	Standard	West Coast (WCU)	5	5	1	Yes	Analysis
2	St Helenabaai Open 2023 (Open)	2023-05-13	2023-05-13	Rapid	West Coast (WCU)	5	5	4.5	Yes	Analysis
3	WCCI Open 2023 (Blitz)	2023-04-29	2023-04-29	Blitz	West Coast (WCU)	5	5	1	Yes	Analysis
4	Deep Blue Chess Club 2022 (Open)	2022-08-20	2022-08-20	Rapid	West Coast (WCU)	5	5	3.5	Yes	Analysis
5	Onder-Weskus Top Skole 2022 (O13 Seuns)	2022-06-04	2022-06-04	Rapid	West Coast (WCU)	5	5	3.5	Yes	Analysis
6	West Coast Open 2021 (Open)	2021-06-26	2021-06-26	Rapid	West Coast (WCU)	6	6	3	Yes	Analysis
7	Lower West Coast Schools Chess Prestige 2021 (U13 Boys)	2021-05-15	2021-05-15	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
8	West Coast Schools Prestige 2020 (U11 Boys)	2020-03-07	2020-03-07	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
9	Onder Weskus Prestige 2020 (U11 Boys)	2020-02-15	2020-02-22	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
10	Back to School Rapid 2020 (Boys)	2020-02-01	2020-02-01	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
11	West Coast Youth Open 2019 (C)	2019-11-30	2019-11-30	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
12	West Coast Youth Open Langebaanweg Club Blitz 2019	2019-11-29	2019-11-29	Blitz	West Coast (WCU)	5	4	2	Yes	Analysis
13	West Coast Club Champs 2019 (A)	2019-09-13	2019-09-14	Standard	West Coast (WCU)	5	5	1	Yes	Analysis
14	Weskus Topskole 2019 (U11)	2019-07-20	2019-07-20	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis
15	Weskus Mall Rapid 2019 (U10)	2019-07-15	2019-07-15	Rapid	West Coast (WCU)	5	4	2	Yes	Analysis
16	Western Cape Schools Individuals 2019 (U11 Boys)	2019-05-18	2019-05-19	Standard	Eden (WEG)	6	6	2.5	Yes	Analysis
17	West Coast Open 2019 (C)	2019-04-27	2019-04-27	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
18	Weskus Skole Prestige Skaak Kampioenskappe 2019 (O11 Seuns)	2019-03-02	2019-04-06	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
19	St Helenabaai Open 2019 (U10)	2019-02-09	2019-02-09	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
20	Onder-Weskus Skole Proewe 2019 (O11 Seuns)	2019-02-16	2019-02-23	Rapid	West Coast (WCU)	8	8	5	Yes	Analysis
21	West Coast Blits Invitational 2018 (Junior)	2018-10-27	2018-10-27	Blitz	West Coast (WCU)	5	5	2.5	Yes	Analysis
22	Woman`s Month Blitz Tournament 2018 (U10+U12)	2018-08-11	2018-08-11	Blitz	West Coast (WCU)	5	5	2	Yes	Analysis
23	Basil Ellman Tournament 2018 (U10+U12)	2018-06-16	2018-06-16	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
24	West Coast Open 2018 (C)	2018-04-28	2018-04-28	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
25	Freedom Day Blitz 2018 (Men)	2018-04-27	2018-04-27	Blitz	West Coast (WCU)	7	7	3	Yes	Analysis
26	West Coast Schools Prestige Individual Championship 2018 (U9 Boys)	2018-03-10	2018-03-24	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
27	Mykonos Blitz U8 (U10+U12)	2018-02-04	2018-02-04	Blitz	West Coast (WCU)	5	5	2	Yes	Analysis

#	Games	Start				End
1	5	Tournament St Helenabaai Open 2023				Tournament St Helenabaai Open 2023
		date 2023-05-13	rnd 1	type Rapid	result 1	date 2023-05-13	rnd 5	type Rapid	result 1
		Opponent Conradie, Q (Quewin)				Opponent Love, C (Celine)
2	4	Tournament Onder-Weskus Top Skole 2022				Tournament Deep Blue Chess Club 2022
		date 2022-06-04	rnd 4	type Rapid	result 1	date 2022-08-20	rnd 2	type Rapid	result 0.5
		Opponent De Wee, N (Noah)				Opponent De Vos, L (Lemar)
3	4	Tournament West Coast Youth Open Langebaanweg Club Blitz 2019				Tournament West Coast Youth Open 2019
		date 2019-11-29	rnd 5	type Blitz	result 1	date 2019-11-30	rnd 3	type Standard	result 1
		Opponent Ocks, K (Keano)				Opponent Mcguire, C (Craig)

#	Games	Start				End
1	5	Tournament West Coast Open 2018				Tournament St Helenabaai Open 2019
		date 2018-04-28	rnd 5	type Standard	result 1	date 2019-02-09	rnd 4	type Standard	result 1
		Opponent Blaauw, E (Elrich)				Opponent Solomons, C (Caywin)
2	3	Tournament West Coast Youth Open 2019				Tournament West Coast Youth Open 2019
		date 2019-11-30	rnd 1	type Standard	result 1	date 2019-11-30	rnd 3	type Standard	result 1
		Opponent Mabaso, S (Sicelo)				Opponent Mcguire, C (Craig)
3	3	Tournament Weskus Skole Prestige Skaak Kampioenskappe 2019				Tournament West Coast Open 2019
		date 2019-04-06	rnd 6	type Standard	result 1	date 2019-04-27	rnd 2	type Standard	result 1
		Opponent Van Wyk, C (Christiaan)				Opponent Boois, C (Conzay)

#	Games	Start				End
1	7	Tournament Deep Blue Chess Club 2022				Tournament St Helenabaai Open 2023
		date 2022-08-20	rnd 4	type Rapid	result 1	date 2023-05-13	rnd 5	type Rapid	result 1
		Opponent Sauls, J (Jada)				Opponent Love, C (Celine)
2	4	Tournament Onder-Weskus Top Skole 2022				Tournament Deep Blue Chess Club 2022
		date 2022-06-04	rnd 4	type Rapid	result 1	date 2022-08-20	rnd 2	type Rapid	result 0.5
		Opponent De Wee, N (Noah)				Opponent De Vos, L (Lemar)
3	4	Tournament Basil Ellman Tournament 2018				Tournament Onder-Weskus Skole Proewe 2019
		date 2018-06-16	rnd 4	type Rapid	result 1	date 2019-02-16	rnd 2	type Rapid	result 1
		Opponent Brandt, A (Ashwin)				Opponent Theron, W (Wian)

#	Games	Start				End
1	3	Tournament Woman`s Month Blitz Tournament 2018				Tournament West Coast Blits Invitational 2018
		date 2018-08-11	rnd 5	type Blitz	result 1	date 2018-10-27	rnd 2	type Blitz	result 0.5
		Opponent Roman, H (Hubert)				Opponent Mitchells, J (Jamie-Lee)
2	2	Tournament Freedom Day Blitz 2018				Tournament Freedom Day Blitz 2018
		date 2018-04-27	rnd 5	type Blitz	result 1	date 2018-04-27	rnd 6	type Blitz	result 1
		Opponent Visagie, C (Christopher)				Opponent Theron, M (Martin)
3	2	Tournament Mykonos Blitz U8				Tournament Mykonos Blitz U8
		date 2018-02-04	rnd 2	type Blitz	result 1	date 2018-02-04	rnd 3	type Blitz	result 1
		Opponent Ring, J (Jason)				Opponent Machelm, B (Braiden)

#	Games	Start				End
1	4	Tournament West Coast Youth Open Langebaanweg Club Blitz 2019				Tournament West Coast Youth Open 2019
		date 2019-11-29	rnd 5	type Blitz	result 1	date 2019-11-30	rnd 3	type Standard	result 1
		Opponent Ocks, K (Keano)				Opponent Mcguire, C (Craig)
2	4	Tournament St Helenabaai Open 2019				Tournament St Helenabaai Open 2019
		date 2019-02-09	rnd 1	type Standard	result 1	date 2019-02-09	rnd 4	type Standard	result 1
		Opponent Olivier, K (Kaylene)				Opponent Solomons, C (Caywin)
3	3	Tournament St Helenabaai Open 2023				Tournament St Helenabaai Open 2023
		date 2023-05-13	rnd 1	type Rapid	result 1	date 2023-05-13	rnd 3	type Rapid	result 1
		Opponent Conradie, Q (Quewin)				Opponent Hess, C (Caleb)

#	Games	Start				End
1	5	Tournament West Coast Open 2018				Tournament St Helenabaai Open 2019
		date 2018-04-28	rnd 5	type Standard	result 1	date 2019-02-09	rnd 4	type Standard	result 1
		Opponent Blaauw, E (Elrich)				Opponent Solomons, C (Caywin)
2	3	Tournament West Coast Youth Open 2019				Tournament West Coast Youth Open 2019
		date 2019-11-30	rnd 1	type Standard	result 1	date 2019-11-30	rnd 3	type Standard	result 1
		Opponent Mabaso, S (Sicelo)				Opponent Mcguire, C (Craig)
3	3	Tournament Weskus Skole Prestige Skaak Kampioenskappe 2019				Tournament West Coast Open 2019
		date 2019-04-06	rnd 6	type Standard	result 1	date 2019-04-27	rnd 2	type Standard	result 1
		Opponent Van Wyk, C (Christiaan)				Opponent Boois, C (Conzay)

#	Games	Start				End
1	5	Tournament Deep Blue Chess Club 2022				Tournament St Helenabaai Open 2023
		date 2022-08-20	rnd 4	type Rapid	result 1	date 2023-05-13	rnd 3	type Rapid	result 1
		Opponent Sauls, J (Jada)				Opponent Hess, C (Caleb)
2	4	Tournament Basil Ellman Tournament 2018				Tournament Onder-Weskus Skole Proewe 2019
		date 2018-06-16	rnd 4	type Rapid	result 1	date 2019-02-16	rnd 2	type Rapid	result 1
		Opponent Brandt, A (Ashwin)				Opponent Theron, W (Wian)
3	3	Tournament West Coast Open 2021				Tournament Onder-Weskus Top Skole 2022
		date 2021-06-26	rnd 6	type Rapid	result 1	date 2022-06-04	rnd 2	type Rapid	result 1
		Opponent Vaaltyn, A (Ash-Jade)				Opponent Mana, I (Ikhona)

#	Games	Start				End
1	2	Tournament Woman`s Month Blitz Tournament 2018				Tournament West Coast Blits Invitational 2018
		date 2018-08-11	rnd 5	type Blitz	result 1	date 2018-10-27	rnd 1	type Blitz	result 1
		Opponent Roman, H (Hubert)				Opponent Oncke, R (Ralph)
2	2	Tournament Freedom Day Blitz 2018				Tournament Freedom Day Blitz 2018
		date 2018-04-27	rnd 5	type Blitz	result 1	date 2018-04-27	rnd 6	type Blitz	result 1
		Opponent Visagie, C (Christopher)				Opponent Theron, M (Martin)
3	2	Tournament Mykonos Blitz U8				Tournament Mykonos Blitz U8
		date 2018-02-04	rnd 2	type Blitz	result 1	date 2018-02-04	rnd 3	type Blitz	result 1
		Opponent Ring, J (Jason)				Opponent Machelm, B (Braiden)

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	Visagie ,C (Christopher)	8	1	-318.8	4	0	-425	2	0	-425	2	1	0
1	Visagie ,C (Christopher)	8	1230.8	912.1	4	1222	805.8	2	1160.1	805.8	2	1200	1230.8
2	Schroeder ,L (Liam)	6	0.5	-354.2	2	0	-425	4	0.5	-318.8	0	0	0
2	Schroeder ,L (Liam)	6	1345.2	991	2	1259.3	920.2	4	1292.6	1026.4	0	0	0
3	Lu ,DTX (Daniel Ting Xu)	4	1	-212.5	0	0	0	3	1	-141.7	1	0	-425
3	Lu ,DTX (Daniel Ting Xu)	4	1291	1078.5	0	0	0	3	1144.9	1149.3	1	1133	866
4	Van Wyk ,C (Christiaan)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
4	Van Wyk ,C (Christiaan)	2	1200.2	1412.8	2	1198.2	1412.8	0	0	0	0	0	0
5	Opperman ,M (Matthew)	2	0	-425	1	0	-425	1	0	-425	0	0	0
5	Opperman ,M (Matthew)	2	1238.8	813.8	1	1212.8	813.8	1	922.4	813.8	0	0	0
6	Burger ,J (Jalem)	2	2	425	1	1	425	1	1	425	0	0	0
6	Burger ,J (Jalem)	2	1190.6	1615.6	1	1200	1615.6	1	1200	1615.6	0	0	0
7	Mabaso ,S (Sicelo)	2	2	425	1	1	425	1	1	425	0	0	0
7	Mabaso ,S (Sicelo)	2	1144.4	1569.4	1	1140.4	1569.4	1	1170	1569.4	0	0	0
8	Van Zyl ,M (Mea)	2	0	-425	1	0	-425	1	0	-425	0	0	0
8	Van Zyl ,M (Mea)	2	1403.9	978.9	1	1496	978.9	1	1180	978.9	0	0	0
9	Njokweni ,L (Llyabona)	2	1	0	1	1	425	0	0	0	1	0	-425
9	Njokweni ,L (Llyabona)	2	1170.1	1170.1	1	1158.6	1595.1	0	0	0	1	1224.2	745.1
10	Ellman ,A (Anne-Belle)	2	1	0	1	0	-425	0	0	0	1	1	425
10	Ellman ,A (Anne-Belle)	2	1104.9	1104.9	1	951.6	679.9	0	0	0	1	1011.6	1529.9

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

De Klerk, J (Jason)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms