Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jonker, R (Ruan)

Chess SA id

1080150210

FIDE id

Date of birth

2008-06-09 (U18)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-09-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1352.8	1321.9	1366.1	1200
Raw rating	1352.8	1321.9	1366.1	1200
Weighted rating	1352	1320.3	1361.6	1200
Weighted performance	1075.6	1024.3	1114.7	0
Floor	893	868.3	866.1	700
K-factor	36	36	36	36
Min/Max rating change allowed	133.4	139.4	130.9	165.8
Highest rating	1402.3 2024-05-01	1477 2023-09-01	1369 2023-06-01	1200 2018-10-01
Highest raw rating	1393 2024-05-01	1368.3 2024-04-01	1366.1 2024-06-01	1200 2024-03-01
Highest weighted rating	1393 2025-07-01	1368.3 2025-06-01	1355.7 2025-08-01	1200 2018-10-01
Highest weighted performance	1402.3 2024-05-01	1477 2023-09-01	1369 2023-06-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1352.8	1321.9	1366.1	1200
Analysis
Rating	1352.8	1321.9	1366.1	1200
Raw rating	1352.8	1321.9	1366.1	1200
Weighted rating	1352	1320.3	1361.6
Weighted performance	1075.6	1024.3	1114.7
K-factor	36	36	36	36
Floor	893	868.3	866.1	700
Max/Min rating change allowed	133.4	139.4	130.9	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	1352.8	1321.9	1366.1	1200
New weighted rating	1351.8	1320	1363	1200
New weighted performance	1067.9	1017	1106.4	0
Temp new rating	1352.8	1321.9	1366.1	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1352.8	1321.9	1366.1	1200
New K-factor	36	36	36	36
New floor	893	868.3	866.1	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	45	35	10
	50	22	28
	0	0	0
	0	0	0
History	95	57	38

Games since
	Main 51	Standard 35		Rapid 16		Blitz 0
Gender	Male
Age group	U18
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	2685		858		373
Male	2157		658		300
U18	418		120		48
U18 Male	356		97		40
Standard
	RSA		Province		Region
Overall	2964		846		371
Male	2353		629		290
U18	471		122		53
U18 Male	398		94		42
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	95	56.5	59.47	80.5	1295.1	1375.6
Standard	57	33	57.89	67.1	1289.4	1356.5
Rapid	38	23.5	61.84	100.7	1303.6	1404.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1352.8	1321.9	1366.1	1200
2025-09-30	1352.8	1321.9	1366.1	1200
2025-09-01	1352.8	1321.9	1366.1	1200
2025-08-01	1352.8	1321.9	1366.1	1200
2025-07-01	1352.8	1321.9	1366.1	1200
2025-06-01	1352.7	1321.9	1366.1	1200
2025-05-01	1352.3	1321.8	1366.1	1200
2025-04-01	1351.7	1321.6	1366.1	1200
2025-03-01	1350.6	1320.9	1366.1	1200
2025-02-01	1349.1	1319.3	1366.1	1200
2025-01-01	1347.1	1310.7	1366.1	1200
2024-12-01	1347.1	1310.7	1366.1	1200
2024-11-01	1347.1	1310.7	1366.1	1200
2024-10-01	1347.1	1310.7	1366.1	1200
2024-09-01	1319.1	1275.8	1366.1	1200
2024-08-01	1319.1	1275.8	1366.1	1200
2024-07-01	1377.7	1342.4	1366.1	1200
2024-09-01	1377.7	1342.4	1366.1	1200
2024-05-01	1393	1368.3	1338.4	1200
2024-04-01	1373.2	1368.3	1287.3	1200
2024-03-01	1350	1331	1287.3	1200
2024-02-01	1367	1347.6	1287.3	1200
2024-01-01	1367	1347.6	1287.3	1200
2023-12-01	1367	1347.6	1287.3	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	CT League 2024 (C)	2024-07-20	2024-09-07	Standard	Cape Town (WCT)	11	3	2	Yes	Analysis
2	CT League 2024 (D)	2024-08-03	2024-08-03	Standard	Cape Town (WCT)	6	3	1	Yes	Analysis
3	CT Metro District East Top Schools Chess 2024 (U18 Mixed)	2024-07-27	2024-07-28	Standard	Cape Town (WCT)	7	6	1	Yes	Analysis
4	Cape Town Junior League Finals 2024 (U18 Open A)	2024-05-18	2024-05-18	Rapid	Cape Town (WCT)	5	4	3.5	Yes	Analysis
5	Steinitz Chess Festival 2024 (Open)	2024-05-10	2024-05-12	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
6	Cape Town Junior League Qualifier 2024 (U18 Open)	2024-04-06	2024-04-06	Rapid	Cape Town (WCT)	6	6	5	Yes	Analysis
7	Cape Town Open Chess Championship 2024 (Intermediate)	2024-03-16	2024-03-17	Standard	Cape Town (WCT)	6	6	5	Yes	Analysis
8	Cape Town Metro Schools Chess Closed Individuals 2024 (U18 Boys)	2024-03-02	2024-03-03	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
9	CT District East Schools Chess Individuals Trails 2024 (U18 Boys)	2024-02-03	2024-02-03	Standard	Cape Town (WCT)	5	5	3	Yes	Analysis
10	Kraaifontein Open 2023 (Open)	2023-12-10	2023-12-10	Rapid	Cape Town (WCT)	6	6	3	Yes	Analysis
11	Paarl Boys High Chess Festival 2023 (Elite Division)	2023-10-13	2023-10-14	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
12	Cape Town Junior Chess League Finals 2023 (U16A)	2023-09-16	2023-09-16	Rapid	Cape Town (WCT)	7	7	2.5	Yes	Analysis
13	WP Club League 2023 (D PlayOffs)	2023-09-02	2023-09-09	Standard	Cape Town (WCT)	5	4	4	Yes	Analysis
14	Cape Town Junior Chess League - Round 1 2023 (U16A)	2023-07-22	2023-07-22	Rapid	Cape Town (WCT)	7	7	5	Yes	Analysis
15	CT Metro District East Top Schools Chess 2023 (U15 Mixed)	2023-07-29	2023-07-29	Rapid	Cape Town (WCT)	3	3	1	Yes	Analysis
16	Cape Town Junior League 2nd Qualifier 2023 (U16)	2023-06-03	2023-06-03	Rapid	Cape Town (WCT)	6	5	3.5	Yes	Analysis
17	Steinitz Open 2023 (C)	2023-05-26	2023-05-28	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
18	District East Schools Chess Individual Trials 2023 (U15 Boys)	2023-02-03	2023-02-04	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis

#	Games	Start				End
1	10	Tournament Cape Town Open Chess Championship 2024				Tournament Cape Town Junior League Qualifier 2024
		date 2024-03-16	rnd 2	type Standard	result 1	date 2024-04-06	rnd 5	type Rapid	result 1
		Opponent Matthee, C (Connor)				Opponent Roux, T (Tarquin)
2	5	Tournament Cape Town Junior League Finals 2024				Tournament CT League 2024
		date 2024-05-18	rnd 1	type Rapid	result 1	date 2024-07-20	rnd 2	type Standard	result 1
		Opponent Tyokwana, K (Khayone)				Opponent Nkonyana, A (Aphelele)
3	4	Tournament WP Club League 2023				Tournament WP Club League 2023
		date 2023-09-02	rnd 1	type Standard	result 1	date 2023-09-09	rnd 4	type Standard	result 1
		Opponent Rudman, M (Mighail)				Opponent Pienaar, S (Schalk)

#	Games	Start				End
1	9	Tournament Steinitz Open 2023				Tournament Paarl Boys High Chess Festival 2023
		date 2023-05-27	rnd 4	type Standard	result 1	date 2023-10-13	rnd 2	type Standard	result 1
		Opponent Siteto, L (Lindokuhle)				Opponent Botha, L (Lika)
2	5	Tournament Cape Town Open Chess Championship 2024				Tournament Cape Town Open Chess Championship 2024
		date 2024-03-16	rnd 2	type Standard	result 1	date 2024-03-17	rnd 6	type Standard	result 1
		Opponent Matthee, C (Connor)				Opponent Kilawushe, I (Inganathi)
3	3	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament Cape Town Metro Schools Chess Closed Individuals 2024
		date 2024-03-03	rnd 4	type Standard	result 0.5	date 2024-03-03	rnd 6	type Standard	result 1
		Opponent Daniels, P (Peter)				Opponent Serekonyane, K (Khanyo)

#	Games	Start				End
1	5	Tournament Cape Town Junior League Qualifier 2024				Tournament Cape Town Junior League Qualifier 2024
		date 2024-04-06	rnd 1	type Rapid	result 1	date 2024-04-06	rnd 5	type Rapid	result 1
		Opponent Pape, J (Joshua)				Opponent Roux, T (Tarquin)
2	4	Tournament Cape Town Junior League Finals 2024				Tournament Cape Town Junior League Finals 2024
		date 2024-05-18	rnd 1	type Rapid	result 1	date 2024-05-18	rnd 4	type Rapid	result 1
		Opponent Tyokwana, K (Khayone)				Opponent Scholtz, T (Triston)
3	4	Tournament Cape Town Junior League 2nd Qualifier 2023				Tournament Cape Town Junior Chess League - Round 1 2023
		date 2023-06-03	rnd 4	type Rapid	result 1	date 2023-07-22	rnd 1	type Rapid	result 1
		Opponent Philisani, Y (Yamkela)				Opponent Palmer, J (Jesse)

No games found.

#	Games	Start				End

#	Games	Start				End
1	10	Tournament Cape Town Open Chess Championship 2024				Tournament Cape Town Junior League Qualifier 2024
		date 2024-03-16	rnd 2	type Standard	result 1	date 2024-04-06	rnd 5	type Rapid	result 1
		Opponent Matthee, C (Connor)				Opponent Roux, T (Tarquin)
2	4	Tournament WP Club League 2023				Tournament WP Club League 2023
		date 2023-09-02	rnd 1	type Standard	result 1	date 2023-09-09	rnd 4	type Standard	result 1
		Opponent Rudman, M (Mighail)				Opponent Pienaar, S (Schalk)
3	4	Tournament Cape Town Junior League 2nd Qualifier 2023				Tournament Cape Town Junior Chess League - Round 1 2023
		date 2023-06-03	rnd 4	type Rapid	result 1	date 2023-07-22	rnd 1	type Rapid	result 1
		Opponent Philisani, Y (Yamkela)				Opponent Palmer, J (Jesse)

#	Games	Start				End
1	9	Tournament Steinitz Open 2023				Tournament Paarl Boys High Chess Festival 2023
		date 2023-05-27	rnd 4	type Standard	result 1	date 2023-10-13	rnd 2	type Standard	result 1
		Opponent Siteto, L (Lindokuhle)				Opponent Botha, L (Lika)
2	5	Tournament Cape Town Open Chess Championship 2024				Tournament Cape Town Open Chess Championship 2024
		date 2024-03-16	rnd 2	type Standard	result 1	date 2024-03-17	rnd 6	type Standard	result 1
		Opponent Matthee, C (Connor)				Opponent Kilawushe, I (Inganathi)
3	2	Tournament Steinitz Chess Festival 2024				Tournament Steinitz Chess Festival 2024
		date 2024-05-11	rnd 4	type Standard	result 1	date 2024-05-12	rnd 5	type Standard	result 1
		Opponent Wilton, D (Duran)				Opponent Mcintosh, H (Hamish)

#	Games	Start				End
1	5	Tournament Cape Town Junior League Qualifier 2024				Tournament Cape Town Junior League Qualifier 2024
		date 2024-04-06	rnd 1	type Rapid	result 1	date 2024-04-06	rnd 5	type Rapid	result 1
		Opponent Pape, J (Joshua)				Opponent Roux, T (Tarquin)
2	4	Tournament Cape Town Junior League 2nd Qualifier 2023				Tournament Cape Town Junior Chess League - Round 1 2023
		date 2023-06-03	rnd 4	type Rapid	result 1	date 2023-07-22	rnd 1	type Rapid	result 1
		Opponent Philisani, Y (Yamkela)				Opponent Palmer, J (Jesse)
3	2	Tournament Cape Town Junior League Finals 2024				Tournament Cape Town Junior League Finals 2024
		date 2024-05-18	rnd 3	type Rapid	result 1	date 2024-05-18	rnd 4	type Rapid	result 1
		Opponent Nelson, OS (Olenka Shai)				Opponent Scholtz, T (Triston)

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	Daniels ,P (Peter)	2	1.5	212.5	1	0.5	0	1	1	425	0	0	0
1	Daniels ,P (Peter)	2	1174.2	1386.7	1	1235.3	1174.2	1	1117.2	1599.2	0	0	0
2	Scholtz ,T (Triston)	2	2	425	0	0	0	2	2	425	0	0	0
2	Scholtz ,T (Triston)	2	1290.3	1715.3	0	0	0	2	1184.4	1715.3	0	0	0
3	Uys ,B (Brendan)	2	1	0	0	0	0	2	1	0	0	0	0
3	Uys ,B (Brendan)	2	1255.6	1255.6	0	0	0	2	1224.3	1255.6	0	0	0
4	Goussard ,T (Tiaan)	2	1	0	0	0	0	2	1	0	0	0	0
4	Goussard ,T (Tiaan)	2	1191.4	1191.4	0	0	0	2	1184.4	1191.4	0	0	0
5	Philisani ,Y (Yamkela)	2	2	425	0	0	0	2	2	425	0	0	0
5	Philisani ,Y (Yamkela)	2	1211.4	1636.4	0	0	0	2	1219.6	1636.4	0	0	0
6	Petersen-Bizaare ,S (Shaqeel)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Petersen-Bizaare ,S (Shaqeel)	1	1311	886	1	1318	886	0	0	0	0	0	0
7	Schuch ,C (Corneel)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Schuch ,C (Corneel)	1	1200	775	1	1200	775	0	0	0	0	0	0
8	Siyo ,A (Ayabulela)	1	1	425	1	1	425	0	0	0	0	0	0
8	Siyo ,A (Ayabulela)	1	1246.8	1671.8	1	1238.9	1671.8	0	0	0	0	0	0
9	Kilawushe ,I (Inganathi)	1	1	425	1	1	425	0	0	0	0	0	0
9	Kilawushe ,I (Inganathi)	1	1191.3	1616.3	1	1176.8	1616.3	0	0	0	0	0	0
10	White ,D (Dvenerio)	1	1	425	1	1	425	0	0	0	0	0	0
10	White ,D (Dvenerio)	1	1308.8	1733.8	1	1303.5	1733.8	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Jonker, R (Ruan)

Ratings

Game statistics

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms