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 (U14)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-07

Personal details last changed

1900-01-01

Junior GPX Games

41.1

Junior GPX Points

1302.3

Item	Main	Standard	Rapid	Blitz
Rating	1471.6	1438.4	1475.2	1156.9
Raw rating	1471.6	1436.5	1475.2	1156.9
Weighted rating	1454.7	1438.4	1432.3	1152.2
Weighted performance	1392.2	1370.4	1447.1	0
Floor	1017.6	987.9	990.6	700
K-factor	32	32	32	36
Min/Max rating change allowed	112.6	118.4	112	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	1490.6 2024-04-01	1200 2024-02-01
Highest weighted rating	1450.7 2025-09-30	1436.1 2025-09-30	1421.1 2025-09-01	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	2	0	0
New rating	1471.6	1440.4	1475.2	1156.9
Analysis
Rating	1471.6	1438.4	1475.2	1156.9
Raw rating	1471.6	1436.5	1475.2	1156.9
Weighted rating	1454.7	1438.4	1432.3
Weighted performance	1392.2	1370.4	1447.1
K-factor	32	32	32	36
Floor	1017.6	987.9	990.6	700
Max/Min rating change allowed	112.6	118.4	112	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	1471.6	1436.5	1475.2	1156.9
New weighted rating	1458.2	1440.4	1437.1	1152.3
New weighted performance	1383.8	1362.1	1438.1	0
Temp new rating	1471.6	1440.4	1475.2	1156.9
Temp new rating +/-	0	2	0	0
Final new rating +/-	0	2	0	0
New rating	1471.6	1440.4	1475.2	1156.9
New K-factor	32	32	32	36
New floor	1017.6	987.9	990.6	700

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	49	29	20	0
	74	37	30	7
	24	10	14	0
	0	0	0	0
	0	0	0	0
History	147	76	64	7

Games since
	Main 123	Standard 66		Rapid 50		Blitz 7
Gender	Male
Age group	U14
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	1500		463		30
Male	1265		385		25
U14	215		69		4
U14 Male	165		51		3
Standard
	RSA		Province		Region
Overall	1698		462		24
Male	1405		371		19
U14	259		75		4
U14 Male	195		53		3
Rapid
	RSA		Province		Region
Overall	289		139		28
Male	261		125		22
U14	43		26		6
U14 Male	36		21		5
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	49	32	65.31	130.1	1371.1	1501.2
Standard	29	17	58.62	73.3	1425.4	1498.7
Rapid	20	15	75	212.5	1292.2	1504.7
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	147	96.5	65.65	133	1321.4	1454.4
Standard	76	49	64.47	123	1349.8	1472.9
Rapid	64	45.5	71.09	179.3	1271.9	1451.2
Blitz	7	2	28.57	-182.1	1466.3	1284.2

Date	Main	Standard	Rapid	Blitz
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
2024-08-01	1371.7	1414.4	1377.9	1137.7
2024-07-01	1371.7	1414.4	1377.9	1137.7
2024-09-01	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
2024-01-01	1341.8	1322.8	1315.6	1200
2023-12-01	1341.8	1322.8	1315.6	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	Western Cape Schools - Top Schools 2025 (U13)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	0.5	Yes	Analysis
2	Pedro Booyse Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	5	4	3	Yes	Analysis
3	Western Cape Women�s Championship 2025 (Advanced)	2025-08-08	2025-08-10	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
4	Lower West Coast Top Schools 2025 (U13)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
5	Western Cape Schools Individual Championship 2025 (U13 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
6	West Coast And Mykonos Open 2025 (Open)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
7	West Coast Schools Chess Prestige 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	6	5.5	Yes	Analysis
8	Lower West Coast Prestige 2025 (U13 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
9	Laerskool Welgemoed Rapid 2025 (U14)	2025-02-15	2025-02-15	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Western Cape Schools - Top Schools 2025 (U13)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	0.5	Yes	Analysis
2	Pedro Booyse Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	5	4	3	Yes	Analysis
3	Western Cape Women�s Championship 2025 (Advanced)	2025-08-08	2025-08-10	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
4	Lower West Coast Top Schools 2025 (U13)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
5	Western Cape Schools Individual Championship 2025 (U13 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
6	West Coast And Mykonos Open 2025 (Open)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	6	6	4	Yes	Analysis
7	West Coast Schools Chess Prestige 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	6	5.5	Yes	Analysis
8	Lower West Coast Prestige 2025 (U13 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
9	Laerskool Welgemoed Rapid 2025 (U14)	2025-02-15	2025-02-15	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
10	West Coast Grand Challange League 2024 (PS Champions)	2024-10-26	2024-10-26	Rapid	West Coast (WCU)	5	5	4.5	Yes	Analysis
11	Western Cape Top Schools Championship 2024 (U13 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	6	6	4	Yes	Analysis
12	Western Cape Women�s Championship 2024 (Intermediate)	2024-08-10	2024-08-10	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
13	Western Cape Women�s Championship 2024 (U14)	2024-08-09	2024-08-09	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
14	Pedro Booyse Top Schools Championships 2024 (U13)	2024-07-20	2024-07-20	Standard	West Coast (WCU)	5	5	5	Yes	Analysis
15	Basil Ellman Annual Rapid 2024 (Elite)	2024-06-08	2024-06-08	Rapid	West Coast (WCU)	5	5	0	Yes	Analysis
16	West Coast & Mykonos Open 2024 (U14)	2024-05-18	2024-05-18	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
17	Western Cape PS Individuals Championship 2024 (U13 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
18	Deep Blue Open 2024 (Advanced)	2024-04-13	2024-04-13	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
19	Western Cape Inter Region Cup 2024 (U14 Boys)	2024-03-23	2024-03-24	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
20	Western Cape Inter Region Cup 2024 (Blitz)	2024-03-22	2024-03-22	Blitz	Overberg (WOS)	7	7	2	Yes	Analysis
21	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
22	Lower West Coast Schools Chess Prestige 2024 (U13 Boys)	2024-02-17	2024-02-17	Rapid	West Coast (WCU)	5	5	5	Yes	Analysis
23	Longacres Top 10 Battle January 2024	2024-01-27	2024-01-27	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
24	Deep Blue Open 2023 (Juniors)	2023-09-16	2023-09-16	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
25	Basil Ellman Rapid 2023 (B)	2023-09-30	2023-09-30	Rapid	West Coast (WCU)	5	5	2.5	Yes	Analysis
26	CW Top Schools 2023 (U12)	2023-08-12	2023-08-12	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
27	Pedro Booyse Top Schools 2023 (U13)	2023-07-29	2023-07-29	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
28	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	Van Rooyen ,B (Beuton)	2	2	425	2	2	425	0	0	0	0	0	0
4	Van Rooyen ,B (Beuton)	2	1111	1536	2	1121.2	1536	0	0	0	0	0	0
5	Erasmus ,H (Heinrich)	2	2	425	1	1	425	1	1	425	0	0	0
5	Erasmus ,H (Heinrich)	2	1236.4	1661.4	1	1228.4	1661.4	1	1194	1661.4	0	0	0
6	Engelbrecht ,V (Vinchenzo)	2	2	425	1	1	425	1	1	425	0	0	0
6	Engelbrecht ,V (Vinchenzo)	2	1175.8	1600.8	1	1151	1600.8	1	1129.2	1600.8	0	0	0
7	Swartz ,A (Ashan)	2	2	425	1	1	425	1	1	425	0	0	0
7	Swartz ,A (Ashan)	2	1190.4	1615.4	1	1218.1	1615.4	1	1214.3	1615.4	0	0	0
8	Johnston ,R (Reece)	2	2	425	1	1	425	1	1	425	0	0	0
8	Johnston ,R (Reece)	2	1217.9	1642.9	1	1214.4	1642.9	1	1156	1642.9	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	Siebritz ,Y (Yul)	2	0.5	-212.5	0	0	0	2	0.5	-212.5	0	0	0
10	Siebritz ,Y (Yul)	2	1430.8	1218.3	0	0	0	2	1501.4	1218.3	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Willemse, S (Schalk)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms