Chess South Africa Ratings Database

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Personal

Prinsloo, W (Willem)

Chess SA id

1140192801

FIDE id

Date of birth

2014-11-03 (U14)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-12-09

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1605.9	1386.9	1653.6	1200
Raw rating	1582.7	1386.9	1489	1200
Weighted rating	1351.1	1265.7	1283.6	1200
Weighted performance	1605.9	1383.5	1653.6	0
Floor	1082.7	886.9	989	700
K-factor	32	36	32	36
Min/Max rating change allowed	96.1	127	109.9	165.8
Highest rating	1605.9 2026-01-01	1414.4 2025-11-01	1653.6 2026-01-01	1200 2024-02-01
Highest raw rating	1582.7 2026-01-01	1386.9 2025-11-01	1489 2026-01-01	1200 2024-02-01
Highest weighted rating	1351.1 2026-01-01	1271.5 2024-02-01	1283.6 2026-01-01	1200 2024-02-01
Highest weighted performance	1605.9 2026-01-01	1414.4 2025-11-01	1653.6 2026-01-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	12.7	90	-10.9	0
New rating	1618.6	1476.9	1642.7	1200
Analysis
Rating	1605.9	1386.9	1653.6	1200
Raw rating	1582.7	1386.9	1489	1200
Weighted rating	1351.1	1265.7	1283.6
Weighted performance	1605.9	1383.5	1653.6
K-factor	32	36	32	36
Floor	1082.7	886.9	989	700
Max/Min rating change allowed	96.1	127	109.9	165.8
Games	5	5	0	0
Score	3.5	3.5	0	0
Expected score	3.21	2.23	0	0
Score-Expected	0.29	1.27	0	0
Temp raw +/-	9.3	45.7	0	0
Final raw +/-	9.3	45.7	0	0
New raw rating	1592	1432.6	1489	1200
New weighted rating	1375.5	1282.3	1302.5	1200
New weighted performance	1618.6	1476.9	1642.7	0
Temp new rating	1618.6	1476.9	1642.7	1200
Temp new rating +/-	12.7	90	-10.9	0
Final new rating +/-	12.7	90	-10.9	0
New rating	1618.6	1476.9	1642.7	1200
New K-factor	32	32	32	36
New floor	1092	932.6	989	700

Item	Main	Standard	Rapid
	0	0	0
	55	27	28
	22	5	17
	0	0	0
	0	0	0
	0	0	0
History	77	32	45

Games since
	Main 77	Standard 32		Rapid 45		Blitz 0
Gender	Male
Age group	U12
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	936		291		32
Male	821		252		27
U12	77		23		2
U12 Male	61		18		2
Standard
	RSA		Province		Region
Overall	2084		579		86
Male	1698		451		64
U12	268		74		11
U12 Male	195		52		7
Rapid
	RSA		Province		Region
Overall	160		76		9
Male	150		72		9
U12	13		9		2
U12 Male	12		8		2
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 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	55	38.5	70	170	1372.9	1542.9
Standard	27	15.5	57.41	63	1380.8	1443.7
Rapid	28	23	82.14	273.2	1365.3	1638.5
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	77	48.5	62.99	110.4	1333.2	1443.6
Standard	32	16.5	51.56	13.3	1363.1	1376.4
Rapid	45	32	71.11	179.4	1312	1491.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1582.7	1386.9	1489	1200
2025-11-30	1503.2	1386.9	1356.2	1200
2025-11-01	1503.2	1386.9	1356.2	1200
2025-09-30	1480	1302	1380	1200
2025-09-01	1480	1302	1380	1200
2025-08-01	1345.2	1302	1218.5	1200
2025-07-01	1326.7	1271.5	1218.5	1200
2025-06-01	1326.7	1271.5	1218.5	1200
2025-05-01	1326.7	1271.5	1218.5	1200
2025-04-01	1326.7	1271.5	1218.5	1200
2025-03-01	1276.7	1244.7	1218.5	1200
2025-02-01	1188.3	1161.3	1218.5	1200
2025-01-01	1194.2	1144.8	1218.5	1200
2024-12-01	1194.2	1144.8	1218.5	1200
2024-11-01	1194.2	1144.8	1218.5	1200
2024-10-01	1206.1	1144.8	1260.6	1200
2024-09-01	1206.1	1144.8	1260.6	1200
2024-11-01	1162.9	1144.8	1200.8	1200
2024-07-01	1162.9	1144.8	1200.8	1200
2024-06-01	1162.9	1144.8	1200.8	1200
2024-05-01	1162.9	1144.8	1200.8	1200
2024-04-01	1162.9	1144.8	1200.8	1200
2024-03-01	1197.4	1200	1200.8	1200
2024-02-01	1200	1200	1200	1200

Comming soon.

Tournaments

History

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Helderberg Chess Club Open 2026 (U13 Boys)	2026-01-17	2026-01-17	Standard	Cape Town (WCT)	5	5	3.5	Yes	Analysis

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Helderberg Chess Club Open 2026 (U13 Boys)	2026-01-17	2026-01-17	Standard	Cape Town (WCT)	5	5	3.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Helderberg Chess Club Open 2026 (U13 Boys)	2026-01-17	2026-01-17	Standard	Cape Town (WCT)	5	5	3.5	Yes	Analysis
2	Six Gun Grill Summer Sport Festival Chess Championships 2025 (Individual U13 Boys)	2025-12-09	2025-12-09	Rapid	Cape Winelands (WCW)	5	5	4	Yes	Analysis
3	Six Gun Grill Summer Sport Festival Chess Championships 2025 (Team U13)	2025-12-08	2025-12-08	Rapid	Cape Winelands (WCW)	5	5	4	Yes	Analysis
4	Kraaifontein Open 2025 (Junior Rapid U12)	2025-12-06	2025-12-06	Rapid	Cape Town (WCT)	6	6	5.5	Yes	Analysis
5	WCSC Brian Raubenheimer Development 2025 (U11 Boys)	2025-11-29	2025-11-29	Rapid	Cape Winelands (WCW)	5	5	5	Yes	Analysis
6	Paarl Boys' High School Chess Festival 2025 (Primary Schools)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
7	UCT Open Chess Championship 2025 (U12)	2025-10-11	2025-10-11	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
8	Kleinmond Chess Club Open 2025 (U12)	2025-08-30	2025-08-30	Rapid	Overberg (WOS)	6	6	5	Yes	Analysis
9	Curro Chess Open Rapid 2025 (U12)	2025-08-23	2025-08-23	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
10	Stellenbosch Primary 2025 (U11)	2025-08-16	2025-08-16	Rapid	Cape Winelands (WCW)	5	5	5	Yes	Analysis
11	Cape Winelands Schools Development 2025 (U11 Boys)	2025-08-02	2025-08-02	Rapid	Cape Winelands (WCW)	5	5	5	Yes	Analysis
12	Cape Winelands Open 2025 (U12)	2025-07-19	2025-07-19	Standard	Cape Winelands (WCW)	5	5	2	Yes	Analysis
13	Cape Winelands Schools Prestige 2025 (U11 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
14	Cape Winelands Schools - Trials 1 2025 (U11 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
15	Marie Delport Memorial 2025 (U12 Boys)	2025-01-25	2025-01-26	Standard	Cape Winelands (WCW)	6	6	2.5	Yes	Analysis
16	Laerskool Welgemoed Rapid 2024 (U12)	2024-10-19	2024-10-19	Rapid	Cape Town (WCT)	6	6	2	Yes	Analysis
17	Stellenbosch Primary 2024 (U11)	2024-08-17	2024-08-17	Rapid	Cape Winelands (WCW)	5	5	4	Yes	Analysis
18	Cape Winelands Schools - Prestige 2024 (U11 Boys)	2024-03-02	2024-03-02	Standard	Cape Winelands (WCW)	5	5	1	Yes	Analysis
19	Cape Winelands Schools - PS Trials 1 2024 (U11 Boys)	2024-02-10	2024-02-10	Rapid	Cape Winelands (WCW)	6	6	3	Yes	Analysis

#	Games	Start				End
1	11	Tournament Cape Winelands Schools Development 2025				Tournament Curro Chess Open Rapid 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-23	rnd 1	type Rapid	result 1
		Opponent Andrews, J (Jerahn)				Opponent Amoraal, S (Simeon)
2	8	Tournament Curro Chess Open Rapid 2025				Tournament UCT Open Chess Championship 2025
		date 2025-08-23	rnd 6	type Rapid	result 1	date 2025-10-11	rnd 1	type Rapid	result 1
		Opponent Rockman Gonzales, K (Kendal)				Opponent Hou, S (Summer)
3	5	Tournament Marie Delport Memorial 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-01-26	rnd 6	type Standard	result 0.5	date 2025-02-22	rnd 4	type Standard	result 1
		Opponent Venter, L (Logan)				Opponent Robertson, M (Marvin)

#	Games	Start				End
1	5	Tournament Marie Delport Memorial 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-01-26	rnd 6	type Standard	result 0.5	date 2025-02-22	rnd 4	type Standard	result 1
		Opponent Venter, L (Logan)				Opponent Robertson, M (Marvin)
2	3	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Open 2025
		date 2025-03-08	rnd 5	type Standard	result 1	date 2025-07-19	rnd 2	type Standard	result 1
		Opponent Meisel, M (Michael)				Opponent Johnson, B (Brian)
3	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Arendse, D (Diego)				Opponent Arendse, D (Diego)

#	Games	Start				End
1	12	Tournament Laerskool Welgemoed Rapid 2024				Tournament Curro Chess Open Rapid 2025
		date 2024-10-19	rnd 6	type Rapid	result 1	date 2025-08-23	rnd 1	type Rapid	result 1
		Opponent Smith, L (Llewellyn)				Opponent Amoraal, S (Simeon)
2	7	Tournament Curro Chess Open Rapid 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-23	rnd 6	type Rapid	result 1	date 2025-08-30	rnd 6	type Rapid	result 1
		Opponent Rockman Gonzales, K (Kendal)				Opponent Snyman, V (Van Zyl)
3	3	Tournament Stellenbosch Primary 2024				Tournament Stellenbosch Primary 2024
		date 2024-08-17	rnd 3	type Rapid	result 1	date 2024-08-17	rnd 5	type Rapid	result 1
		Opponent Jumat, M (Mj)				Opponent Nagel, A (Alexander)

No games found.

#	Games	Start				End

#	Games	Start				End
1	11	Tournament Cape Winelands Schools Development 2025				Tournament Curro Chess Open Rapid 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-23	rnd 1	type Rapid	result 1
		Opponent Andrews, J (Jerahn)				Opponent Amoraal, S (Simeon)
2	4	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 4	type Standard	result 1
		Opponent Smit, N (Nicolai)				Opponent Robertson, M (Marvin)
3	3	Tournament Curro Chess Open Rapid 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-23	rnd 6	type Rapid	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Rockman Gonzales, K (Kendal)				Opponent Van Der Walt, T (Tristan)

#	Games	Start				End
1	4	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-22	rnd 4	type Standard	result 1
		Opponent Smit, N (Nicolai)				Opponent Robertson, M (Marvin)
2	3	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Open 2025
		date 2025-03-08	rnd 5	type Standard	result 1	date 2025-07-19	rnd 2	type Standard	result 1
		Opponent Meisel, M (Michael)				Opponent Johnson, B (Brian)
3	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Arendse, D (Diego)				Opponent Arendse, D (Diego)

#	Games	Start				End
1	12	Tournament Laerskool Welgemoed Rapid 2024				Tournament Curro Chess Open Rapid 2025
		date 2024-10-19	rnd 6	type Rapid	result 1	date 2025-08-23	rnd 1	type Rapid	result 1
		Opponent Smith, L (Llewellyn)				Opponent Amoraal, S (Simeon)
2	3	Tournament Curro Chess Open Rapid 2025				Tournament Kleinmond Chess Club Open 2025
		date 2025-08-23	rnd 6	type Rapid	result 1	date 2025-08-30	rnd 2	type Rapid	result 1
		Opponent Rockman Gonzales, K (Kendal)				Opponent Van Der Walt, T (Tristan)
3	3	Tournament Stellenbosch Primary 2024				Tournament Stellenbosch Primary 2024
		date 2024-08-17	rnd 3	type Rapid	result 1	date 2024-08-17	rnd 5	type Rapid	result 1
		Opponent Jumat, M (Mj)				Opponent Nagel, A (Alexander)

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	Viljoen ,A (Adrihan)	2	1	0	2	1	0	0	0	0	0	0	0
1	Viljoen ,A (Adrihan)	2	1345.2	1345.2	2	1319.1	1345.2	0	0	0	0	0	0
2	Nel ,C (Charles Paul)	2	0	-425	1	0	-425	1	0	-425	0	0	0
2	Nel ,C (Charles Paul)	2	1671.4	1246.4	1	1734.1	1246.4	1	1425.6	1246.4	0	0	0
3	Van Wyk ,M (Micaile)	2	0.5	-212.5	1	0	-425	1	0.5	0	0	0	0
3	Van Wyk ,M (Micaile)	2	1493.7	1281.2	1	1362.3	1068.7	1	1587	1493.7	0	0	0
4	Smit ,N (Nicolai)	2	2	425	1	1	425	1	1	425	0	0	0
4	Smit ,N (Nicolai)	2	1199.8	1624.8	1	1200	1624.8	1	1200	1624.8	0	0	0
5	Visser ,D (David)	2	1	0	1	0	-425	1	1	425	0	0	0
5	Visser ,D (David)	2	1220.8	1220.8	1	1200	795.8	1	1245	1645.8	0	0	0
6	Bekker ,T (Thian)	2	2	425	0	0	0	2	2	425	0	0	0
6	Bekker ,T (Thian)	2	1302.2	1727.2	0	0	0	2	1197.5	1727.2	0	0	0
7	Von Wielligh ,S (Sven)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Von Wielligh ,S (Sven)	1	1343.9	918.9	1	1326.5	918.9	0	0	0	0	0	0
8	Smith ,W (Willow)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Smith ,W (Willow)	1	1397.5	972.5	1	1368.7	972.5	0	0	0	0	0	0
9	Goncalves Alho ,M (Miguel)	1	1	425	1	1	425	0	0	0	0	0	0
9	Goncalves Alho ,M (Miguel)	1	1486.6	1911.6	1	1468.4	1911.6	0	0	0	0	0	0
10	Roux ,J (Juan)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Roux ,J (Juan)	1	1523.6	1098.6	1	1436.4	1098.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Prinsloo, W (Willem)

Ratings

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Last 24 raw ratings

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Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms