Chess South Africa Ratings Database

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Personal

Willemse, S (Schalk)

Chess SA id

1120157843

FIDE id

Date of birth

2012-02-13 (U16)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-11-29

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1503.5	1442	1513	1156.9
Raw rating	1503.5	1436.5	1513	1156.9
Weighted rating	1464.7	1442	1445.7	1152.5
Weighted performance	1391.5	1340.5	1475.9	0
Floor	1017.6	987.9	1013	700
K-factor	32	32	32	36
Min/Max rating change allowed	107.6	118.4	106.2	176.3
Highest rating	1547.4 2023-06-01	1536.4 2023-08-01	1627.2 2023-06-01	1200 2018-10-01
Highest raw rating	1517.6 2025-08-01	1487.9 2025-06-01	1513 2026-01-01	1200 2024-02-01
Highest weighted rating	1464.7 2026-01-01	1436.1 2025-09-30	1445.7 2026-01-01	1200 2018-10-01
Highest weighted performance	1547.4 2023-06-01	1536.4 2023-08-01	1627.2 2023-06-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	1.2	0	0
New rating	1503.5	1443.3	1513	1156.9
Analysis
Rating	1503.5	1442	1513	1156.9
Raw rating	1503.5	1436.5	1513	1156.9
Weighted rating	1464.7	1442	1445.7
Weighted performance	1391.5	1340.5	1475.9
K-factor	32	32	32	36
Floor	1017.6	987.9	1013	700
Max/Min rating change allowed	107.6	118.4	106.2	176.3
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	1503.5	1436.5	1513	1156.9
New weighted rating	1469.8	1443.3	1452.3	1152.8
New weighted performance	1382.1	1331.3	1465.7	0
Temp new rating	1503.5	1443.3	1513	1156.9
Temp new rating +/-	0	1.2	0	0
Final new rating +/-	0	1.2	0	0
New rating	1503.5	1443.3	1513	1156.9
New K-factor	32	32	32	36
New floor	1017.6	987.9	1013	700

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	53	29	24	0
	74	37	30	7
	24	10	14	0
	0	0	0	0
	0	0	0	0
History	151	76	68	7

Games since
	Main 127	Standard 66		Rapid 54		Blitz 7
Gender	Male
Age group	U14
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	1401		430		28
Male	1186		359		23
U14	190		63		4
U14 Male	150		48		3
Standard
	RSA		Province		Region
Overall	1683		459		24
Male	1388		366		19
U14	250		76		4
U14 Male	185		52		3
Rapid
	RSA		Province		Region
Overall	247		116		23
Male	225		105		18
U14	31		17		4
U14 Male	26		13		3
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	53	34.5	65.09	128.3	1379.2	1507.5
Standard	29	17	58.62	73.3	1425.4	1498.7
Rapid	24	17.5	72.92	194.8	1323.4	1518.2
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	151	99	65.56	132.3	1325.6	1457.9
Standard	76	49	64.47	123	1349.8	1472.9
Rapid	68	48	70.59	175	1284.1	1459.1
Blitz	7	2	28.57	-182.1	1466.3	1284.2

Date	Main	Standard	Rapid	Blitz
2026-01-01	1503.5	1436.5	1513	1156.9
2025-11-30	1481.9	1436.5	1493.1	1156.9
2025-11-01	1471.6	1436.5	1475.2	1156.9
2025-09-30	1471.6	1436.5	1475.2	1156.9
2025-09-01	1502.6	1465.9	1475.2	1156.9
2025-08-01	1517.6	1487.9	1457.7	1156.9
2025-07-01	1507.7	1487.9	1428.4	1156.9
2025-06-01	1507.7	1487.9	1428.4	1156.9
2025-05-01	1475.4	1459.9	1428.4	1156.9
2025-04-01	1475.4	1459.9	1428.4	1156.9
2025-03-01	1433.3	1423.7	1428.4	1156.9
2025-02-01	1432.5	1423.7	1422.7	1156.6
2025-01-01	1432.5	1423.7	1422.7	1137.7
2024-12-01	1432.5	1423.7	1422.7	1137.7
2024-11-01	1410.2	1423.7	1377.9	1137.7
2024-10-01	1410.2	1423.7	1377.9	1137.7
2024-09-01	1414.2	1435.5	1377.9	1137.7
2024-11-01	1371.7	1414.4	1377.9	1137.7
2024-07-01	1371.7	1414.4	1377.9	1137.7
2024-06-01	1421.4	1414.4	1468.8	1137.7
2024-05-01	1395.4	1322.8	1468.8	1137.7
2024-04-01	1402.6	1322.8	1490.6	1137.7
2024-03-01	1376.9	1322.8	1414.7	1200
2024-02-01	1337.2	1322.8	1307.3	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	WCSC Kings & Queens 2025 (Kings)	2025-11-29	2025-11-29	Rapid	Cape Winelands (WCW)	6	4	3	Yes	Analysis
2	West Coast Schools Chess Grand Challenge League 2025 (PS Super)	2025-11-08	2025-11-08	Rapid	West Coast (WCU)	5	4	2.5	Yes	Analysis
3	Western Cape Schools - Top Schools 2025 (U13)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	0.5	Yes	Analysis
4	Pedro Booyse Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	5	4	3	Yes	Analysis
5	Western Cape Women�s Championship 2025 (Advanced)	2025-08-08	2025-08-10	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
6	Lower West Coast Top Schools 2025 (U13)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
7	Western Cape Schools Individual Championship 2025 (U13 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
8	West Coast And Mykonos Open 2025 (Open)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
9	West Coast Schools Chess Prestige 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	6	5.5	Yes	Analysis
10	Lower West Coast Prestige 2025 (U13 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
11	Laerskool Welgemoed Rapid 2025 (U14)	2025-02-15	2025-02-15	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
12	West Coast Grand Challange League 2024 (PS Champions)	2024-10-26	2024-10-26	Rapid	West Coast (WCU)	5	5	4.5	Yes	Analysis
13	Western Cape Top Schools Championship 2024 (U13 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	6	6	4	Yes	Analysis
14	Western Cape Women�s Championship 2024 (Intermediate)	2024-08-10	2024-08-10	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
15	Western Cape Women�s Championship 2024 (U14)	2024-08-09	2024-08-09	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
16	Pedro Booyse Top Schools Championships 2024 (U13)	2024-07-20	2024-07-20	Standard	West Coast (WCU)	5	5	5	Yes	Analysis
17	Basil Ellman Annual Rapid 2024 (Elite)	2024-06-08	2024-06-08	Rapid	West Coast (WCU)	5	5	0	Yes	Analysis
18	West Coast & Mykonos Open 2024 (U14)	2024-05-18	2024-05-18	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
19	Western Cape PS Individuals Championship 2024 (U13 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
20	Deep Blue Open 2024 (Advanced)	2024-04-13	2024-04-13	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
21	Western Cape Inter Region Cup 2024 (U14 Boys)	2024-03-23	2024-03-24	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
22	Western Cape Inter Region Cup 2024 (Blitz)	2024-03-22	2024-03-22	Blitz	Overberg (WOS)	7	7	2	Yes	Analysis
23	West Coast Schools Chess Prestige Championships 2024 (U13 Boys)	2024-03-09	2024-03-09	Rapid	West Coast (WCU)	5	5	4.5	Yes	Analysis
24	Lower West Coast Schools Chess Prestige 2024 (U13 Boys)	2024-02-17	2024-02-17	Rapid	West Coast (WCU)	5	5	5	Yes	Analysis
25	Longacres Top 10 Battle January 2024	2024-01-27	2024-01-27	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
26	Deep Blue Open 2023 (Juniors)	2023-09-16	2023-09-16	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
27	Basil Ellman Rapid 2023 (B)	2023-09-30	2023-09-30	Rapid	West Coast (WCU)	5	5	2.5	Yes	Analysis
28	CW Top Schools 2023 (U12)	2023-08-12	2023-08-12	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
29	Pedro Booyse Top Schools 2023 (U13)	2023-07-29	2023-07-29	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
30	Lower West Coast Top Schools Championships 2023 (U13)	2023-06-10	2023-06-10	Rapid	West Coast (WCU)	5	4	4	Yes	Analysis

#	Games	Start				End
1	12	Tournament Longacres Top 10 Battle January 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-01-27	rnd 4	type Rapid	result 1	date 2024-03-09	rnd 5	type Rapid	result 1
		Opponent Pedro, B (Bladen)				Opponent Booysen, C (Chadlin)
2	10	Tournament Lower West Coast Prestige 2025				Tournament West Coast And Mykonos Open 2025
		date 2025-02-22	rnd 3	type Rapid	result 1	date 2025-05-02	rnd 1	type Standard	result 1
		Opponent Basson, R (Romeaco)				Opponent Tshamlambo, L (Lutho)
3	8	Tournament Western Cape Top Schools Championship 2024				Tournament Laerskool Welgemoed Rapid 2025
		date 2024-09-01	rnd 5	type Standard	result 1	date 2025-02-15	rnd 1	type Rapid	result 1
		Opponent Van Wyk, L (Luca)				Opponent Davids, T (Tyron)

#	Games	Start				End
1	9	Tournament Western Cape Top Schools Championship 2024				Tournament West Coast And Mykonos Open 2025
		date 2024-09-01	rnd 5	type Standard	result 1	date 2025-05-02	rnd 1	type Standard	result 1
		Opponent Van Wyk, L (Luca)				Opponent Tshamlambo, L (Lutho)
2	7	Tournament West Coast & Mykonos Open 2024				Tournament Western Cape Women�s Championship 2024
		date 2024-05-18	rnd 5	type Standard	result 1	date 2024-08-09	rnd 1	type Standard	result 1
		Opponent Stoffberg, M (Mikaeel)				Opponent Van Rooyen, B (Beuton)
3	4	Tournament West Coast And Mykonos Open 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-05-03	rnd 4	type Standard	result 1	date 2025-05-17	rnd 1	type Standard	result 1
		Opponent Groenewaldt, K (Katja)				Opponent De Ridder, B (Bernard)

#	Games	Start				End
1	12	Tournament Longacres Top 10 Battle January 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-01-27	rnd 4	type Rapid	result 1	date 2024-03-09	rnd 5	type Rapid	result 1
		Opponent Pedro, B (Bladen)				Opponent Booysen, C (Chadlin)
2	6	Tournament West Coast Grand Challange League 2024				Tournament Laerskool Welgemoed Rapid 2025
		date 2024-10-26	rnd 1	type Rapid	result 1	date 2025-02-15	rnd 1	type Rapid	result 1
		Opponent Johnson, M (Melanique)				Opponent Davids, T (Tyron)
3	6	Tournament Lower West Coast Top Schools Championships 2023				Tournament Deep Blue Open 2023
		date 2023-06-10	rnd 1	type Rapid	result 1	date 2023-09-16	rnd 2	type Rapid	result 1
		Opponent Erasmus, D (Daniel)				Opponent Swartz, A (Ashan)

#	Games	Start				End
1	1	Tournament Western Cape Inter Region Cup 2024				Tournament Western Cape Inter Region Cup 2024
		date 2024-03-22	rnd 5	type Blitz	result 1	date 2024-03-22	rnd 5	type Blitz	result 1
		Opponent Mackenzie, E (Erin-Lee)				Opponent Mackenzie, E (Erin-Lee)
2	1	Tournament Western Cape Inter Region Cup 2024				Tournament Western Cape Inter Region Cup 2024
		date 2024-03-22	rnd 3	type Blitz	result 1	date 2024-03-22	rnd 3	type Blitz	result 1
		Opponent Avontuur, A (Al-Meeche)				Opponent Avontuur, A (Al-Meeche)

#	Games	Start				End
1	9	Tournament Longacres Top 10 Battle January 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-01-27	rnd 4	type Rapid	result 1	date 2024-03-09	rnd 2	type Rapid	result 1
		Opponent Pedro, B (Bladen)				Opponent Oortman, C (Christiano)
2	7	Tournament Lower West Coast Prestige 2025				Tournament West Coast Schools Chess Prestige 2025
		date 2025-02-22	rnd 3	type Rapid	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Basson, R (Romeaco)				Opponent Azar, C (Christopher)
3	7	Tournament Lower West Coast Top Schools Championships 2023				Tournament Pedro Booyse Top Schools 2023
		date 2023-06-10	rnd 1	type Rapid	result 1	date 2023-07-29	rnd 3	type Standard	result 1
		Opponent Erasmus, D (Daniel)				Opponent Dirks, R (Ryan)

#	Games	Start				End
1	7	Tournament West Coast & Mykonos Open 2024				Tournament Western Cape Women�s Championship 2024
		date 2024-05-18	rnd 5	type Standard	result 1	date 2024-08-09	rnd 1	type Standard	result 1
		Opponent Stoffberg, M (Mikaeel)				Opponent Van Rooyen, B (Beuton)
2	6	Tournament Western Cape Top Schools Championship 2024				Tournament West Coast Schools Chess Prestige 2025
		date 2024-09-01	rnd 5	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Van Wyk, L (Luca)				Opponent Azar, C (Christopher)
3	4	Tournament West Coast And Mykonos Open 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-05-03	rnd 4	type Standard	result 1	date 2025-05-17	rnd 1	type Standard	result 1
		Opponent Groenewaldt, K (Katja)				Opponent De Ridder, B (Bernard)

#	Games	Start				End
1	9	Tournament Longacres Top 10 Battle January 2024				Tournament West Coast Schools Chess Prestige Championships 2024
		date 2024-01-27	rnd 4	type Rapid	result 1	date 2024-03-09	rnd 2	type Rapid	result 1
		Opponent Pedro, B (Bladen)				Opponent Oortman, C (Christiano)
2	6	Tournament Lower West Coast Top Schools Championships 2023				Tournament Deep Blue Open 2023
		date 2023-06-10	rnd 1	type Rapid	result 1	date 2023-09-16	rnd 2	type Rapid	result 1
		Opponent Erasmus, D (Daniel)				Opponent Swartz, A (Ashan)
3	5	Tournament Lower West Coast Prestige 2025				Tournament Lower West Coast Top Schools 2025
		date 2025-02-22	rnd 3	type Rapid	result 1	date 2025-06-14	rnd 2	type Rapid	result 1
		Opponent Basson, R (Romeaco)				Opponent Owies, T (Tiffany)

#	Games	Start				End
1	1	Tournament Western Cape Inter Region Cup 2024				Tournament Western Cape Inter Region Cup 2024
		date 2024-03-22	rnd 5	type Blitz	result 1	date 2024-03-22	rnd 5	type Blitz	result 1
		Opponent Mackenzie, E (Erin-Lee)				Opponent Mackenzie, E (Erin-Lee)
2	1	Tournament Western Cape Inter Region Cup 2024				Tournament Western Cape Inter Region Cup 2024
		date 2024-03-22	rnd 3	type Blitz	result 1	date 2024-03-22	rnd 3	type Blitz	result 1
		Opponent Avontuur, A (Al-Meeche)				Opponent Avontuur, A (Al-Meeche)

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	Klaasens ,J (Jemaine)	5	2	-85	2	1	0	3	1	-141.7	0	0	0
1	Klaasens ,J (Jemaine)	5	1544.4	1459.4	2	1486.9	1544.4	3	1492.1	1402.7	0	0	0
2	Cornforth ,K (Kayleigh)	3	0	-425	2	0	-425	0	0	0	1	0	-425
2	Cornforth ,K (Kayleigh)	3	1617.3	1192.3	2	1695.1	1192.3	0	0	0	1	995.8	1192.3
3	Plint ,G (Gordon)	3	1	-141.7	1	1	425	2	0	-425	0	0	0
3	Plint ,G (Gordon)	3	1201.8	1060.2	1	1200	1626.8	2	1196.9	776.8	0	0	0
4	Swartz ,U (Umaree)	3	3	425	0	0	0	3	3	425	0	0	0
4	Swartz ,U (Umaree)	3	1291.5	1716.5	0	0	0	3	1309.1	1716.5	0	0	0
5	Van Rooyen ,B (Beuton)	2	2	425	2	2	425	0	0	0	0	0	0
5	Van Rooyen ,B (Beuton)	2	1111	1536	2	1121.2	1536	0	0	0	0	0	0
6	Erasmus ,H (Heinrich)	2	2	425	1	1	425	1	1	425	0	0	0
6	Erasmus ,H (Heinrich)	2	1236.4	1661.4	1	1228.4	1661.4	1	1194	1661.4	0	0	0
7	Engelbrecht ,V (Vinchenzo)	2	2	425	1	1	425	1	1	425	0	0	0
7	Engelbrecht ,V (Vinchenzo)	2	1175.8	1600.8	1	1151	1600.8	1	1129.2	1600.8	0	0	0
8	Swartz ,A (Ashan)	2	2	425	1	1	425	1	1	425	0	0	0
8	Swartz ,A (Ashan)	2	1190.4	1615.4	1	1218.1	1615.4	1	1214.3	1615.4	0	0	0
9	Cilliers ,D (Dene)	2	0	-425	1	0	-425	1	0	-425	0	0	0
9	Cilliers ,D (Dene)	2	1479.9	1054.9	1	1597.6	1054.9	1	1295	1054.9	0	0	0
10	Johnston ,R (Reece)	2	2	425	1	1	425	1	1	425	0	0	0
10	Johnston ,R (Reece)	2	1217.9	1642.9	1	1214.4	1642.9	1	1156	1642.9	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Willemse, S (Schalk)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms