Chess South Africa Ratings Database

PLAYER PAGE

Personal

Willenberg, SR (Shaun Ralph)

Chess SA id

164042921

FIDE id

Date of birth

1964-10-15 (Adult)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1665.1	1659.2	1510.6	1510.7
Raw rating	1665.1	1659.2	1510.6	1510.7
Weighted rating	1605.3	1610.4	1509.9	1508
Weighted performance	1521.9	1475.7	1048.3	824.3
Floor	1165.1	1163.8	1142.6	1142.6
K-factor	28	28	28	28
Min/Max rating change allowed	85.5	86.2	106.5	106.5
Highest rating	1698.2 2023-09-01	1700.9 2023-09-01	1642.6 2018-01-01	1642.6 2018-11-01
Highest raw rating	1665.1 2025-11-01	1663.8 2019-05-01	1642.6 2018-01-01	1642.6 2018-01-01
Highest weighted rating	1647.1 2018-01-01	1663.8 2018-01-01	1642.6 2018-01-01	1642.6 2018-11-01
Highest weighted performance	1698.2 2023-09-01	1700.9 2023-09-01	1519.6 2018-06-01	1517.5 2019-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1665.1	1659.2	1510.6	1510.7
Analysis
Rating	1665.1	1659.2	1510.6	1510.7
Raw rating	1665.1	1659.2	1510.6	1510.7
Weighted rating	1605.3	1610.4	1509.9
Weighted performance	1521.9	1475.7	1048.3
K-factor	28	28	28	28
Floor	1165.1	1163.8	1142.6	1142.6
Max/Min rating change allowed	85.5	86.2	106.5	106.5
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	1665.1	1659.2	1510.6	1510.7
New weighted rating	1610.2	1614.3	1509.9	1508
New weighted performance	1520.2	1474	1046.7	822.9
Temp new rating	1665.1	1659.2	1510.6	1510.7
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1665.1	1659.2	1510.6	1510.7
New K-factor	28	28	28	28
New floor	1165.1	1163.8	1142.6	1142.6

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	20	15	0	5
	23	10	6	7
	22	11	11	0
	30	24	6	0
	12	6	6	0
History	629	419	98	112

Games since
	Main 43	Standard 25		Rapid 6		Blitz 12
Gender	Male
Age group	Adult
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	399		122		87
Male	372		115		81
Adult	215		72		53
Adult Male	203		68		49
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	133		62		41
Male	127		59		39
Adult	107		52		34
Adult Male	101		49		32


	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	20	13	65	127.5	1591.1	1718.6
Standard	15	11	73.33	198.3	1530.7	1729
Rapid	0	0	0	0	0	0
Blitz	5	2	40	-85	1772.1	1687.1
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	208	132.5	63.7	116.5	1456.8	1573.2
Standard	123	88.5	71.95	186.6	1424.1	1610.7
Rapid	55	30.5	55.45	46.4	1490.5	1536.9
Blitz	30	13.5	45	-42.5	1528.8	1486.3

Date	Main	Standard	Rapid	Blitz
2025-11-01	1665.1	1659.2	1510.6	1510.7
2025-09-30	1603.2	1606.8	1510.6	1510.7
2025-09-01	1603.2	1606.8	1510.6	1510.7
2025-08-01	1603.2	1606.8	1510.6	1510.7
2025-07-01	1603.2	1606.8	1510.6	1510.7
2025-06-01	1603.2	1606.8	1510.6	1510.7
2025-05-01	1603.2	1606.8	1510.6	1510.7
2025-04-01	1603.2	1606.8	1510.6	1510.7
2025-03-01	1601.1	1606.7	1510.6	1512.6
2025-02-01	1599.2	1605.9	1510.6	1512.5
2025-01-01	1591.4	1596.6	1507.1	1499.1
2024-12-01	1591.4	1596.6	1507.1	1499.1
2024-11-01	1591.4	1596.6	1507.1	1499.1
2024-10-01	1591.4	1596.6	1507.1	1499.1
2024-09-01	1594.5	1612.8	1507.1	1499.1
2024-08-01	1594.5	1612.8	1507.1	1499.1
2024-07-01	1594.5	1612.8	1507.1	1499.1
2024-09-01	1594.5	1612.8	1507.1	1499.1
2024-05-01	1605.8	1612.8	1514.1	1499.1
2024-04-01	1605.8	1612.8	1514.1	1499.1
2024-03-01	1605.8	1612.8	1514.1	1499.1
2024-02-01	1615.4	1612.8	1514.1	1557
2024-01-01	1615.4	1612.8	1514.1	1557
2023-12-01	1615.4	1612.8	1514.1	1548.2

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	Cape Town Chess Federation Club League 2025 (B)	2025-07-26	2025-09-27	Standard	Cape Town (WCT)	11	9	7.5	Yes	Analysis
2	Cape Town Open Chess Festival 2025 (Team Blitz)	2025-03-21	2025-03-21	Blitz	Cape Town (WCT)	6	5	2	Yes	Analysis
3	Cape of Good Hope Open 2025 (Advanced)	2025-02-22	2025-02-23	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
4	Cape Town Masters Challenge 2025 (Advanced)	2025-01-06	2025-01-11	Standard	Cape Town (WCT)	9	0	0	No	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Cape Town Chess Federation Club League 2025 (B)	2025-07-26	2025-09-27	Standard	Cape Town (WCT)	11	9	7.5	Yes	Analysis
2	Cape Town Open Chess Festival 2025 (Team Blitz)	2025-03-21	2025-03-21	Blitz	Cape Town (WCT)	6	5	2	Yes	Analysis
3	Cape of Good Hope Open 2025 (Advanced)	2025-02-22	2025-02-23	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
4	Cape Town Masters Challenge 2025 (Advanced)	2025-01-06	2025-01-11	Standard	Cape Town (WCT)	9	0	0	No	Analysis
5	CT League 2024 (C)	2024-07-20	2024-09-07	Standard	Cape Town (WCT)	11	10	7.5	Yes	Analysis
6	Steinitz Chess Festival 2024 (Open Rapid)	2024-05-11	2024-05-11	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
7	Steinitz Club Team Blitz Championship 2024	2024-02-15	2024-02-15	Blitz	Cape Town (WCT)	7	7	1.5	Yes	Analysis
8	WP Club League 2023 (B)	2023-07-29	2023-09-09	Standard	Cape Town (WCT)	11	5	4	Yes	Analysis
9	WP Club League 2023 (C)	2023-07-29	2023-09-09	Standard	Cape Town (WCT)	11	1	1	Yes	Analysis
10	Rylib Chess Winter Slam 2023 (A)	2023-07-06	2023-07-06	Rapid	Cape Town (WCT)	6	5	2	Yes	Analysis
11	Steinitz Open 2023 (A+B)	2023-05-26	2023-05-28	Standard	Cape Town (WCT)	6	5	4	Yes	Analysis
12	Midas Paints Chess Cup Term 2 2023 (Open)	2023-04-15	2023-04-15	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis
13	Western Cape Club Championship 2022 (Tier 2)	2022-10-07	2022-10-09	Standard	Cape Town (WCT)	6	4	3	Yes	Analysis
14	2022 Western Province Club League (B)	2022-08-20	2022-10-01	Standard	Cape Town (WCT)	11	4	3	Yes	Analysis
15	2022 Western Province Club League (D)	2022-08-27	2022-10-01	Standard	Cape Town (WCT)	7	1	0.5	Yes	Analysis
16	South African Open 2022 (B)	2022-07-09	2022-07-17	Standard	Cape Town (WCT)	11	9	6	Yes	Analysis
17	Steinitz Individual Rapid 2022	2022-06-10	2022-06-10	Rapid	Cape Town (WCT)	6	6	4.5	Yes	Analysis
18	Steinitz Open 2022 (B)	2022-05-20	2022-05-22	Standard	Cape Town (WCT)	6	6	3.5	Yes	Analysis
19	Summer Slam 2021 (Championship)	2021-12-13	2021-12-13	Rapid	Cape Town (WCT)	7	6	2	Yes	Analysis
20	Western Cape Closed 2021 (Prestige)	2021-09-24	2021-09-26	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
21	2019 National Club Chess Championships (B)	2019-09-27	2019-09-29	Standard	Cape Town (WCT)	6	6	4.5	Yes	Analysis
22	2019 Western Province League (B)	2019-07-27	2019-09-07	Standard	Cape Town (WCT)	11	7	4.5	Yes	Analysis
23	2019 Groote Schuur High School Blitz	2019-06-14	2019-06-14	Blitz	Cape Town (WCT)	9	9	5	Yes	Analysis
24	Steinitz Chess Festival 2019 (B)	2019-04-05	2019-04-07	Standard	Cape Town (WCT)	6	6	5	Yes	Analysis
25	Crossroads Open Chess Championship 2019 (Presige)	2019-04-27	2019-04-28	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
26	2019 Cape Town Classic Chess Festival (Rapid)	2019-03-30	2019-03-30	Rapid	Cape Town (WCT)	7	6	3	Yes	Analysis
27	2019 Cape Town Classic Chess Festival (Blitz)	2019-03-29	2019-03-29	Blitz	Cape Town (WCT)	9	9	5	Yes	Analysis
28	Western Cape Chess Club Championship Dec 2018	2018-12-08	2018-12-09	Standard	Eden (WEG)	6	6	5	Yes	Analysis
29	Jakes Gerwel Aurecon 2018 (B)	2018-10-13	2018-10-13	Rapid	Cape Town (WCT)	7	7	5	Yes	Analysis
30	2018 Western Province League (B)	2018-08-04	2018-09-15	Standard	Cape Town (WCT)	11	4	3.5	Yes	Analysis
31	2018 Western Province League (B)	2018-08-04	2018-09-15	Standard	Cape Town (WCT)	11	7	4.5	Yes	Analysis
32	Eldo Smart Memorial Rapid Tournament 2018	2018-06-16	2018-06-16	Rapid	Cape Town (WCT)	7	7	4	Yes	Analysis
33	Crossroads Open Chess Championship 2018 (B)	2018-04-27	2018-04-29	Standard	Cape Town (WCT)	6	4	3.5	Yes	Analysis
34	2018 Steinitz Chess Festival (B)	2018-03-21	2018-03-25	Standard	Cape Town (WCT)	7	6	4.5	Yes	Analysis
35	Steinitz Club Rapid 2018	2018-01-10	2018-01-24	Rapid	Cape Town (WCT)	6	6	3	Yes	Analysis
36	2018 Cape of Good Hope Open Chess Championships (Prestige)	2018-01-26	2018-01-28	Standard	Cape Town (WCT)	6	5	3	Yes	Analysis

#	Games	Start				End
1	13	Tournament 2018 Western Province League				Tournament Western Cape Chess Club Championship Dec 2018
		date 2018-09-08	rnd 10	type Standard	result 1	date 2018-12-08	rnd 4	type Standard	result 1
		Opponent Passensie, T (Terrence)				Opponent Booys, LI (Leatin)
2	12	Tournament 2019 Cape Town Classic Chess Festival				Tournament Crossroads Open Chess Championship 2019
		date 2019-03-30	rnd 7	type Rapid	result 1	date 2019-04-28	rnd 5	type Standard	result 1
		Opponent Jacobs, B (Brandon Lee)				Opponent Brown, SC (Shaun)
3	9	Tournament Cape Town Chess Federation Club League 2025				Tournament Cape Town Chess Federation Club League 2025
		date 2025-08-16	rnd 3	type Standard	result 1	date 2025-09-27	rnd 11	type Standard	result 1
		Opponent Steenkamp, E (Eugene)				Opponent Tom, T (Tony)

#	Games	Start				End
1	12	Tournament Western Cape Chess Club Championship Dec 2018				Tournament Crossroads Open Chess Championship 2019
		date 2018-12-09	rnd 6	type Standard	result 1	date 2019-04-28	rnd 5	type Standard	result 1
		Opponent Klaassen, GR (George)				Opponent Brown, SC (Shaun)
2	9	Tournament South African Open 2022				Tournament 2022 Western Province Club League
		date 2022-07-10	rnd 4	type Standard	result 0.5	date 2022-09-17	rnd 4	type Standard	result 0.5
		Opponent Peter, NM (Neathan)				Opponent Jaftha, J (Jeyhlin)
3	9	Tournament 2018 Steinitz Chess Festival				Tournament 2018 Western Province League
		date 2018-03-24	rnd 6	type Standard	result 0.5	date 2018-08-11	rnd 4	type Standard	result 1
		Opponent Witbooi, L (Lee-Roy)				Opponent Mapiti, T (Tshepang)

#	Games	Start				End
1	8	Tournament Eldo Smart Memorial Rapid Tournament 2018				Tournament Jakes Gerwel Aurecon 2018
		date 2018-06-16	rnd 7	type Rapid	result 1	date 2018-10-13	rnd 7	type Rapid	result 0.5
		Opponent Paulse, AL (Angelo)				Opponent Kedama, S (Sandiso)
2	4	Tournament Steinitz Individual Rapid 2022				Tournament Steinitz Individual Rapid 2022
		date 2022-06-10	rnd 3	type Rapid	result 1	date 2022-06-10	rnd 6	type Rapid	result 1
		Opponent Vermeulen, L (Leonardus)				Opponent Schuller, A (Ashley)
3	3	Tournament Steinitz Chess Festival 2024				Tournament Steinitz Chess Festival 2024
		date 2024-05-11	rnd 4	type Rapid	result 0.5	date 2024-05-11	rnd 6	type Rapid	result 1
		Opponent Abrahams, F (Faaiz)				Opponent Webber, CPS (Colin)

#	Games	Start				End
1	3	Tournament 2019 Cape Town Classic Chess Festival				Tournament 2019 Cape Town Classic Chess Festival
		date 2019-03-29	rnd 3	type Blitz	result 1	date 2019-03-29	rnd 5	type Blitz	result 1
		Opponent Kalala, A (Alladean)				Opponent Mqikela, K (Kamvalethu)
2	2	Tournament Cape Town Open Chess Festival 2025				Tournament Cape Town Open Chess Festival 2025
		date 2025-03-21	rnd 4	type Blitz	result 1	date 2025-03-21	rnd 5	type Blitz	result 1
		Opponent Zweigenthal, D (Daniel)				Opponent Mhembere, M (Munashe)
3	2	Tournament 2019 Groote Schuur High School Blitz				Tournament 2019 Groote Schuur High School Blitz
		date 2019-06-14	rnd 3	type Blitz	result 1	date 2019-06-14	rnd 4	type Blitz	result 1
		Opponent Thakersee, A (Akshay)				Opponent Jaftha, C (Chazlian)

#	Games	Start				End
1	7	Tournament Steinitz Chess Festival 2024				Tournament CT League 2024
		date 2024-05-11	rnd 5	type Rapid	result 1	date 2024-08-17	rnd 5	type Standard	result 1
		Opponent Van Der Brugge, NA (Naomi)				Opponent Rosenberg, W (Wagheed)
2	5	Tournament WP Club League 2023				Tournament WP Club League 2023
		date 2023-07-29	rnd 1	type Standard	result 1	date 2023-08-19	rnd 5	type Standard	result 1
		Opponent Mkentane, L (Lutho)				Opponent Amardien, A (Rafiek)
3	4	Tournament South African Open 2022				Tournament 2022 Western Province Club League
		date 2022-07-15	rnd 8	type Standard	result 1	date 2022-09-03	rnd 6	type Standard	result 1
		Opponent Fourie, DL (Daniel Liam)				Opponent Fredericks, J (Janine)

#	Games	Start				End
1	8	Tournament Steinitz Open 2023				Tournament WP Club League 2023
		date 2023-05-27	rnd 3	type Standard	result 1	date 2023-08-19	rnd 5	type Standard	result 1
		Opponent Lielieveld, J (Jadrian)				Opponent Amardien, A (Rafiek)
2	6	Tournament 2018 Western Province League				Tournament Western Cape Chess Club Championship Dec 2018
		date 2018-09-08	rnd 10	type Standard	result 1	date 2018-12-08	rnd 4	type Standard	result 1
		Opponent Passensie, T (Terrence)				Opponent Booys, LI (Leatin)
3	5	Tournament CT League 2024				Tournament CT League 2024
		date 2024-07-20	rnd 1	type Standard	result 1	date 2024-08-17	rnd 5	type Standard	result 1
		Opponent Dubbeld, B (Benjamin)				Opponent Rosenberg, W (Wagheed)

#	Games	Start				End
1	3	Tournament Midas Paints Chess Cup Term 2 2023				Tournament Midas Paints Chess Cup Term 2 2023
		date 2023-04-15	rnd 3	type Rapid	result 1	date 2023-04-15	rnd 5	type Rapid	result 1
		Opponent Viljoen, L (Lucca)				Opponent Oosthuizen, R (Robert)
2	2	Tournament Steinitz Chess Festival 2024				Tournament Steinitz Chess Festival 2024
		date 2024-05-11	rnd 5	type Rapid	result 1	date 2024-05-11	rnd 6	type Rapid	result 1
		Opponent Van Der Brugge, NA (Naomi)				Opponent Webber, CPS (Colin)
3	2	Tournament Rylib Chess Winter Slam 2023				Tournament Rylib Chess Winter Slam 2023
		date 2023-07-06	rnd 2	type Rapid	result 1	date 2023-07-06	rnd 3	type Rapid	result 1
		Opponent Mchontsi, A (Ayabonga)				Opponent Jansen, B (Beunay)

#	Games	Start				End
1	3	Tournament 2019 Cape Town Classic Chess Festival				Tournament 2019 Cape Town Classic Chess Festival
		date 2019-03-29	rnd 3	type Blitz	result 1	date 2019-03-29	rnd 5	type Blitz	result 1
		Opponent Kalala, A (Alladean)				Opponent Mqikela, K (Kamvalethu)
2	2	Tournament Cape Town Open Chess Festival 2025				Tournament Cape Town Open Chess Festival 2025
		date 2025-03-21	rnd 4	type Blitz	result 1	date 2025-03-21	rnd 5	type Blitz	result 1
		Opponent Zweigenthal, D (Daniel)				Opponent Mhembere, M (Munashe)
3	2	Tournament 2019 Groote Schuur High School Blitz				Tournament 2019 Groote Schuur High School Blitz
		date 2019-06-14	rnd 3	type Blitz	result 1	date 2019-06-14	rnd 4	type Blitz	result 1
		Opponent Thakersee, A (Akshay)				Opponent Jaftha, C (Chazlian)

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	Mkentane ,L (Lutho)	5	4.5	340	4	3.5	318.8	1	1	425	0	0	0
1	Mkentane ,L (Lutho)	5	1386.8	1726.8	4	1404.8	1705.5	1	1337	1811.8	0	0	0
2	Jacobs ,B (Brandon Lee)	5	3	85	1	0.5	0	2	1.5	212.5	2	1	0
2	Jacobs ,B (Brandon Lee)	5	1393.6	1478.6	1	1356	1393.6	2	1151	1606.1	2	1186.4	1393.6
3	Willenberg ,GI (Glen Ivan)	3	0.5	-283.3	2	0.5	-212.5	1	0	-425	0	0	0
3	Willenberg ,GI (Glen Ivan)	3	1675.9	1392.6	2	1709.1	1463.4	1	1622	1250.9	0	0	0
4	Esau ,O (Omar Omar)	3	2	141.7	2	2	425	1	0	-425	0	0	0
4	Esau ,O (Omar Omar)	3	1370.4	1512.1	2	1373.6	1795.4	1	1387.7	945.4	0	0	0
5	Mchontsi ,A (Ayabonga)	3	3	425	1	1	425	2	2	425	0	0	0
5	Mchontsi ,A (Ayabonga)	3	1496.5	1921.5	1	1409.1	1921.5	2	1382.2	1921.5	0	0	0
6	Nkosana ,L (Luvuyo)	3	2.5	283.3	1	1	425	2	1.5	212.5	0	0	0
6	Nkosana ,L (Luvuyo)	3	1309.7	1593	1	1098.6	1734.7	2	1057.4	1522.2	0	0	0
7	Passensie ,T (Terrence)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
7	Passensie ,T (Terrence)	2	1224.7	1437.2	2	1228.4	1437.2	0	0	0	0	0	0
8	Siyo ,S (Sibabale)	2	2	425	2	2	425	0	0	0	0	0	0
8	Siyo ,S (Sibabale)	2	1496.9	1921.9	2	1514.6	1921.9	0	0	0	0	0	0
9	Steenkamp ,E (Eugene)	2	1	0	2	1	0	0	0	0	0	0	0
9	Steenkamp ,E (Eugene)	2	1453.5	1453.5	2	1406.2	1453.5	0	0	0	0	0	0
10	Cunningham ,L (Lezerick)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
10	Cunningham ,L (Lezerick)	2	1429.8	1642.3	2	1408.5	1642.3	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Willenberg, SR (Shaun Ralph)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms