Chess South Africa Ratings Database

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Personal

Viljoen, A (Adrihan)

Chess SA id

1140135534

FIDE id

Date of birth

2014-01-30 (U12)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-23

Personal details last changed

1900-01-01

Junior GPX Games

66.7

Junior GPX Points

1284.2

Item	Main	Standard	Rapid	Blitz
Rating	1429.9	1384.3	1388.6	1200
Raw rating	1429.9	1384.3	1388.6	1200
Weighted rating	1352	1332	1322.2	1200
Weighted performance	1368.6	1333.5	1294.9	0
Floor	929.9	884.3	888.6	700
K-factor	32	36	36	36
Min/Max rating change allowed	119.5	127.5	126.8	165.8
Highest rating	1429.9 2025-09-01	1463.4 2022-04-01	1388.6 2025-09-01	1200 2018-10-01
Highest raw rating	1429.9 2025-09-01	1384.3 2025-09-01	1388.6 2025-09-01	1200 2024-02-01
Highest weighted rating	1342.7 2025-09-01	1325.4 2025-09-01	1314.1 2025-09-01	1200 2018-10-01
Highest weighted performance	1390.1 2022-04-01	1463.4 2022-04-01	1321.5 2022-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1429.9	1384.3	1388.6	1200
Analysis
Rating	1429.9	1384.3	1388.6	1200
Raw rating	1429.9	1384.3	1388.6	1200
Weighted rating	1352	1332	1322.2
Weighted performance	1368.6	1333.5	1294.9
K-factor	32	36	36	36
Floor	929.9	884.3	888.6	700
Max/Min rating change allowed	119.5	127.5	126.8	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	1429.9	1384.3	1388.6	1200
New weighted rating	1360.7	1338.1	1329.7	1200
New weighted performance	1368.1	1333	1294.4	0
Temp new rating	1429.9	1384.3	1388.6	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1429.9	1384.3	1388.6	1200
New K-factor	32	36	36	36
New floor	929.9	884.3	888.6	700

Item	Main	Standard	Rapid
	0	0	0
	59	46	13
	80	43	37
	0	0	0
	21	17	4
	5	0	5
History	165	106	59

Games since
	Main 139	Standard 89		Rapid 50		Blitz 0
Gender	Male
Age group	U12
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	1872		563		87
Male	1570		455		67
U12	237		74		13
U12 Male	173		53		9
Standard
	RSA		Province		Region
Overall	2219		604		86
Male	1813		462		64
U12	293		86		11
U12 Male	217		62		7
Rapid
	RSA		Province		Region
Overall	557		286		39
Male	484		246		33
U12	80		48		10
U12 Male	62		36		8
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	59	35	59.32	79.2	1337.7	1417
Standard	46	26	56.52	55.4	1344.4	1399.8
Rapid	13	9	69.23	163.5	1314.4	1477.8
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	165	97	58.79	74.7	1271.3	1346
Standard	106	60.5	57.08	60.1	1294	1354.1
Rapid	59	36.5	61.86	100.8	1230.6	1331.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1429.9	1384.3	1388.6	1200
2025-09-01	1429.9	1384.3	1388.6	1200
2025-08-01	1386.2	1375.6	1337.9	1200
2025-07-01	1386.2	1375.6	1337.9	1200
2025-06-01	1386.2	1375.6	1337.9	1200
2025-05-01	1358	1340	1337.9	1200
2025-04-01	1375.9	1355.2	1337.9	1200
2025-03-01	1378.9	1355.9	1337.9	1200
2025-02-01	1355	1331	1329.7	1200
2025-01-01	1335.5	1307.1	1329.7	1200
2024-12-01	1296.3	1259.6	1329.7	1200
2024-11-01	1296.3	1259.6	1329.7	1200
2024-10-01	1336.2	1334.8	1275.7	1200
2024-09-01	1325.3	1320.6	1275.7	1200
2024-08-01	1290.4	1269.8	1275.7	1200
2024-07-01	1270	1269.8	1233.6	1200
2024-06-01	1270	1269.8	1233.6	1200
2024-08-01	1260.4	1259.4	1233.6	1200
2024-04-01	1271.1	1259.4	1256.6	1200
2024-03-01	1259.7	1256.5	1256.6	1200
2024-02-01	1240	1256.5	1207.6	1200
2024-01-01	1255.2	1256.5	1229.6	1200
2023-12-01	1255.2	1256.5	1229.6	1200
2023-11-01	1255.2	1256.5	1229.6	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	Cape Winelands Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	2	2	Yes	Analysis
2	Western Cape Women�s Championship 2025 (U12)	2025-08-09	2025-08-09	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
3	Western Cape Women�s Championship 2025 (Sunday Rapid)	2025-08-10	2025-08-10	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
4	Western Cape Schools Individual Championship 2025 (U11 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
5	West Coast And Mykonos Open 2025 (U12)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
6	South African Junior Closed Chess Championships 2025 (U12 Open)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	3	Yes	Analysis
7	Cape Town Open Chess Festival 2025 (U12)	2025-03-22	2025-03-23	Standard	Cape Town (WCT)	6	5	2	Yes	Analysis
8	Cape Winelands Schools Prestige 2025 (U11 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
9	Cape Winelands Schools - Trials 1 2025 (U11 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
10	Laerskool Welgemoed Rapid 2025 (U12)	2025-02-15	2025-02-15	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
11	Marie Delport Memorial 2025 (U12 Boys)	2025-01-25	2025-01-26	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Cape Winelands Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	2	2	Yes	Analysis
2	Western Cape Women�s Championship 2025 (U12)	2025-08-09	2025-08-09	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
3	Western Cape Women�s Championship 2025 (Sunday Rapid)	2025-08-10	2025-08-10	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
4	Western Cape Schools Individual Championship 2025 (U11 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	3	Yes	Analysis
5	West Coast And Mykonos Open 2025 (U12)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
6	South African Junior Closed Chess Championships 2025 (U12 Open)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	3	Yes	Analysis
7	Cape Town Open Chess Festival 2025 (U12)	2025-03-22	2025-03-23	Standard	Cape Town (WCT)	6	5	2	Yes	Analysis
8	Cape Winelands Schools Prestige 2025 (U11 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
9	Cape Winelands Schools - Trials 1 2025 (U11 Boys)	2025-02-22	2025-02-22	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
10	Laerskool Welgemoed Rapid 2025 (U12)	2025-02-15	2025-02-15	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
11	Marie Delport Memorial 2025 (U12 Boys)	2025-01-25	2025-01-26	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
12	Mzansi Interprovincial Youth Chess Championships 2024 (U12 Open Candidates)	2024-12-16	2024-12-19	Standard	Capricorn (LCP)	7	7	4.5	Yes	Analysis
13	Worcester Knock-Out 2024 (U11 Boys)	2024-10-19	2024-10-19	Rapid	Cape Winelands (WCW)	6	6	5	Yes	Analysis
14	UCT Open Chess Championship 2024 (Intermediate)	2024-10-12	2024-10-13	Standard	Cape Town (WCT)	6	5	1	Yes	Analysis
15	Chess Elevation Series -September 2024 (Level 1)	2024-09-20	2024-09-21	Standard	Cape Town (WCT)	5	5	2	Yes	Analysis
16	Akkertjies Invitational 2024 (U13 Boys)	2024-09-14	2024-09-14	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
17	Western Cape Women�s Championship 2024 (U12)	2024-08-09	2024-08-09	Standard	West Coast (WCU)	5	5	2	Yes	Analysis
18	De Villiers PS Tournament 2024 (U14)	2024-08-17	2024-08-17	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
19	Curro Durbanville Chess Rapid Open 2024 (Beginner)	2024-07-13	2024-07-13	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
20	West Coast & Mykonos Open 2024 (U12)	2024-05-18	2024-05-18	Standard	West Coast (WCU)	5	2	1	Yes	Analysis
21	Worcester PS League 2024 (U11)	2024-04-27	2024-04-27	Standard	Cape Winelands (WCW)	5	4	2.5	Yes	Analysis
22	Hermanus Chess Club Open 2024 (Development)	2024-04-20	2024-04-20	Rapid	Overberg (WOS)	7	7	4	Yes	Analysis
23	Cape Winelands Schools - Prestige 2024 (U11 Boys)	2024-03-02	2024-03-02	Standard	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
24	Cape of Good Hope Open Chess Tournament 2024 (U10)	2024-02-17	2024-02-17	Rapid	Cape Town (WCT)	6	6	3	Yes	Analysis
25	Cape Winelands Schools - PS Trials 1 2024 (U11 Boys)	2024-02-10	2024-02-10	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
26	Cape Winelands - Marie Delport Memorial 2024 (U12)	2024-01-27	2024-01-27	Rapid	Cape Winelands (WCW)	6	6	2.5	Yes	Analysis
27	Western Cape Schools 2022 (U9 Boys)	2022-05-28	2022-05-29	Standard	Cape Winelands (WCW)	6	6	2	Yes	Analysis
28	WN Akkertjies 2022 (Juniors)	2022-04-27	2022-04-27	Standard	Cape Winelands (WCW)	6	6	5	Yes	Analysis
29	Cape Winelands Schools 2022 (U9 Boys)	2022-03-12	2022-03-12	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
30	Worcester Schools Trials 2022 (U9 Boys+Girls)	2022-02-19	2022-02-19	Rapid	Cape Winelands (WCW)	5	4	3	Yes	Analysis
31	Cape Winelands Schools Trials 2021 (U9 Boys)	2021-10-16	2021-10-16	Rapid	Cape Winelands (WCW)	5	5	2	Yes	Analysis

#	Games	Start				End
1	7	Tournament Worcester Knock-Out 2024				Tournament Mzansi Interprovincial Youth Chess Championships 2024
		date 2024-10-19	rnd 3	type Rapid	result 1	date 2024-12-17	rnd 3	type Standard	result 0.5
		Opponent Kaffer, N (Noah)				Opponent De Villiers, C (Christiaan)
2	7	Tournament De Villiers PS Tournament 2024				Tournament Akkertjies Invitational 2024
		date 2024-08-17	rnd 1	type Standard	result 1	date 2024-09-14	rnd 2	type Standard	result 1
		Opponent Fluks, J (Jovan)				Opponent Mudau, U (Unarine)
3	6	Tournament Hermanus Chess Club Open 2024				Tournament Worcester PS League 2024
		date 2024-04-20	rnd 5	type Rapid	result 1	date 2024-04-27	rnd 4	type Standard	result 1
		Opponent Beukes, C (Cullen)				Opponent Mangweni, L (Liqhame)

#	Games	Start				End
1	7	Tournament De Villiers PS Tournament 2024				Tournament Akkertjies Invitational 2024
		date 2024-08-17	rnd 1	type Standard	result 1	date 2024-09-14	rnd 2	type Standard	result 1
		Opponent Fluks, J (Jovan)				Opponent Mudau, U (Unarine)
2	4	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Town Open Chess Festival 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-22	rnd 1	type Standard	result 1
		Opponent Smith, H (Hayden)				Opponent Isaacs, L (Luke)
3	4	Tournament Akkertjies Invitational 2024				Tournament Chess Elevation Series -September 2024
		date 2024-09-14	rnd 4	type Standard	result 1	date 2024-09-20	rnd 2	type Standard	result 0.5
		Opponent Viljoen, S (Steyn)				Opponent Nel, J (Joshua)

#	Games	Start				End
1	7	Tournament Hermanus Chess Club Open 2024				Tournament Curro Durbanville Chess Rapid Open 2024
		date 2024-04-20	rnd 5	type Rapid	result 1	date 2024-07-13	rnd 4	type Rapid	result 1
		Opponent Beukes, C (Cullen)				Opponent Smith, Z (Zachary)
2	5	Tournament Western Cape Women�s Championship 2025				Tournament Cape Winelands Top Schools 2025
		date 2025-08-10	rnd 3	type Rapid	result 1	date 2025-08-23	rnd 2	type Rapid	result 1
		Opponent Sibanda, R (Robert)				Opponent Holmes, M (Matthew)
3	4	Tournament Worcester Knock-Out 2024				Tournament Worcester Knock-Out 2024
		date 2024-10-19	rnd 3	type Rapid	result 1	date 2024-10-19	rnd 6	type Rapid	result 1
		Opponent Kaffer, N (Noah)				Opponent Krynauw, E (Eben)

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament Worcester Knock-Out 2024				Tournament Mzansi Interprovincial Youth Chess Championships 2024
		date 2024-10-19	rnd 3	type Rapid	result 1	date 2024-12-16	rnd 2	type Standard	result 1
		Opponent Kaffer, N (Noah)				Opponent Bisram, N (Neha)
2	5	Tournament Western Cape Women�s Championship 2025				Tournament Cape Winelands Top Schools 2025
		date 2025-08-10	rnd 3	type Rapid	result 1	date 2025-08-23	rnd 2	type Rapid	result 1
		Opponent Sibanda, R (Robert)				Opponent Holmes, M (Matthew)
3	5	Tournament Laerskool Welgemoed Rapid 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-15	rnd 4	type Rapid	result 1	date 2025-02-22	rnd 2	type Standard	result 1
		Opponent Buchner, C (Chris)				Opponent Neethling, J (Jacques)

#	Games	Start				End
1	4	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Town Open Chess Festival 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-22	rnd 1	type Standard	result 1
		Opponent Smith, H (Hayden)				Opponent Isaacs, L (Luke)
2	4	Tournament Cape Winelands Schools 2022				Tournament Cape Winelands Schools 2022
		date 2022-03-12	rnd 1	type Standard	result 1	date 2022-03-12	rnd 4	type Standard	result 1
		Opponent Geel, M (Matthew)				Opponent Kriel, D (Daniel)
3	3	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-02-22	rnd 4	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Rossouw, H (Henry)				Opponent Meisel, M (Michael)

#	Games	Start				End
1	7	Tournament Hermanus Chess Club Open 2024				Tournament Curro Durbanville Chess Rapid Open 2024
		date 2024-04-20	rnd 5	type Rapid	result 1	date 2024-07-13	rnd 4	type Rapid	result 1
		Opponent Beukes, C (Cullen)				Opponent Smith, Z (Zachary)
2	5	Tournament Western Cape Women�s Championship 2025				Tournament Cape Winelands Top Schools 2025
		date 2025-08-10	rnd 3	type Rapid	result 1	date 2025-08-23	rnd 2	type Rapid	result 1
		Opponent Sibanda, R (Robert)				Opponent Holmes, M (Matthew)
3	4	Tournament Worcester Knock-Out 2024				Tournament Worcester Knock-Out 2024
		date 2024-10-19	rnd 3	type Rapid	result 1	date 2024-10-19	rnd 6	type Rapid	result 1
		Opponent Kaffer, N (Noah)				Opponent Krynauw, E (Eben)

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	Van Tonder ,L (Luhann)	4	1	-212.5	3	0	-425	1	1	425	0	0	0
1	Van Tonder ,L (Luhann)	4	1249.1	1036.6	3	1246.9	824.1	1	1200	1674.1	0	0	0
2	Milhomem ,D (Daniel)	3	2	141.7	1	1	425	2	1	0	0	0	0
2	Milhomem ,D (Daniel)	3	1244.1	1385.8	1	1174.8	1669.1	2	1262.8	1244.1	0	0	0
3	Prinsloo ,W (Willem)	2	1	0	2	1	0	0	0	0	0	0	0
3	Prinsloo ,W (Willem)	2	1191.2	1191.2	2	1153.1	1191.2	0	0	0	0	0	0
4	Stern ,M (Mason)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Stern ,M (Mason)	2	1575	1150	2	1582.8	1150	0	0	0	0	0	0
5	Weng ,I (Ivan)	2	2	425	2	2	425	0	0	0	0	0	0
5	Weng ,I (Ivan)	2	1282.8	1707.8	2	1223.2	1707.8	0	0	0	0	0	0
6	Rossouw ,H (Henry)	2	2	425	2	2	425	0	0	0	0	0	0
6	Rossouw ,H (Henry)	2	1223.8	1648.8	2	1226	1648.8	0	0	0	0	0	0
7	Robertson ,M (Marvin)	2	2	425	2	2	425	0	0	0	0	0	0
7	Robertson ,M (Marvin)	2	1447.7	1872.7	2	1354.3	1872.7	0	0	0	0	0	0
8	Cilliers ,D (Dene)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Cilliers ,D (Dene)	2	1429.6	1004.6	2	1396.8	1004.6	0	0	0	0	0	0
9	Klopper ,E (Elzaan)	2	2	425	2	2	425	0	0	0	0	0	0
9	Klopper ,E (Elzaan)	2	1343	1768	2	1324.3	1768	0	0	0	0	0	0
10	Fluks ,J (Jovan)	2	2	425	2	2	425	0	0	0	0	0	0
10	Fluks ,J (Jovan)	2	1077.4	1502.4	2	1099.2	1502.4	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Viljoen, A (Adrihan)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms