Chess South Africa Ratings Database

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Personal

Willis, C (Cronan)

Chess SA id

109078336

FIDE id

Date of birth

2009-08-19 (U18)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-07-20

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1434.4	1404.5	1414.4	834
Raw rating	1434.4	1404.5	1414.4	834
Weighted rating	1434.2	1404.3	1414.2	834
Weighted performance	1192.8	1185.2	800.9	0
Floor	973.4	945.5	914.4	500
K-factor	32	32	32	40
Min/Max rating change allowed	118.7	123.9	122.2	279.3
Highest rating	1473.4 2024-03-01	1445.5 2024-02-01	1423.3 2020-02-01	1200 2024-02-01
Highest raw rating	1473.4 2024-03-01	1445.5 2024-02-01	1414.4 2024-03-01	834 2024-02-01
Highest weighted rating	1473.4 2024-03-01	1445.5 2024-04-01	1413.8 2025-08-01	834 2024-11-01
Highest weighted performance	1455.9 2023-09-01	1435.9 2023-09-01	1423.3 2020-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1434.4	1404.5	1414.4	834
Analysis
Rating	1434.4	1404.5	1414.4	834
Raw rating	1434.4	1404.5	1414.4	834
Weighted rating	1434.2	1404.3	1414.2
Weighted performance	1192.8	1185.2	800.9
K-factor	32	32	32	40
Floor	973.4	945.5	914.4	500
Max/Min rating change allowed	118.7	123.9	122.2	279.3
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	1434.4	1404.5	1414.4	834
New weighted rating	1433.9	1404	1414.3	834
New weighted performance	1184.3	1176.7	792.6	0
Temp new rating	1434.4	1404.5	1414.4	834
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1434.4	1404.5	1414.4	834
New K-factor	32	32	32	40
New floor	973.4	945.5	914.4	500

Item	Main	Standard	Rapid
	0	0	0
	4	4	0
	25	19	6
	21	21	0
	15	11	4
	5	0	5
History	319	222	97

Games since
	Main 29	Standard 23		Rapid 6		Blitz 0
Gender	Male
Age group	U18
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	4	1	25	-212.5	1471.7	1259.2
Standard	4	1	25	-212.5	1471.7	1259.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	198	135	68.18	154.5	1205.6	1360.1
Standard	129	83	64.34	121.9	1224.2	1346.1
Rapid	69	52	75.36	215.6	1170.7	1386.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1434.4	1404.5	1414.4	834
2025-09-30	1434.4	1404.5	1414.4	834
2025-09-01	1434.4	1404.5	1414.4	834
2025-08-01	1434.4	1404.5	1414.4	834
2025-07-01	1438.4	1408.8	1414.4	834
2025-06-01	1438.4	1408.8	1414.4	834
2025-05-01	1438.4	1408.8	1414.4	834
2025-04-01	1438.4	1408.8	1414.4	834
2025-03-01	1438.4	1408.8	1414.4	834
2025-02-01	1437.4	1407.9	1414.4	834
2025-01-01	1418.5	1391.2	1414.4	834
2024-12-01	1418.5	1391.2	1414.4	834
2024-11-01	1418.5	1391.2	1414.4	834
2024-10-01	1418.5	1391.2	1414.4	834
2024-09-01	1435.5	1404.6	1414.4	834
2024-08-01	1435.5	1404.6	1414.4	834
2024-07-01	1432.8	1395.6	1414.4	834
2024-09-01	1432.8	1395.6	1414.4	834
2024-05-01	1432.8	1395.6	1414.4	834
2024-04-01	1432.8	1395.6	1414.4	834
2024-03-01	1473.4	1445.5	1414.4	834
2024-02-01	1469.4	1445.5	1405.4	834
2024-01-01	1469.4	1445.5	1405.4	834
2023-12-01	1469.4	1445.5	1405.4	834

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 Open 2025 (Advanced)	2025-07-19	2025-07-20	Standard	Cape Winelands (WCW)	6	4	1	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Cape Winelands Open 2025 (Advanced)	2025-07-19	2025-07-20	Standard	Cape Winelands (WCW)	6	4	1	Yes	Analysis
2	Western Cape Top Schools Championship 2024 (U15 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	6	6	1.5	Yes	Analysis
3	Cape Winelands - Top Schools 2024 (U15 Mixed)	2024-07-27	2024-07-27	Standard	Cape Winelands (WCW)	5	4	2	Yes	Analysis
4	Western Cape HS Individuals Championship 2024 (U15 Boys)	2024-03-21	2024-03-22	Standard	Overberg (WOS)	6	4	0.5	Yes	Analysis
5	Cape Winelands Schools - Prestige 2024 (U15 Boys)	2024-03-02	2024-03-02	Standard	Cape Winelands (WCW)	5	5	4	Yes	Analysis
6	Cape Winelands Schools - HS Trials 1 2024 (U15 Boys)	2024-02-17	2024-02-17	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
7	Western Cape Top Schools 2023 (U18 Mixed)	2023-09-02	2023-09-03	Standard	Cape Winelands (WCW)	6	5	3.5	Yes	Analysis
8	Western Cape HS Individuals 2023 (U15 Boys)	2023-04-01	2023-04-02	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
9	Cape Winelands Schools Prestige 2023 (U15 Boys)	2023-03-11	2023-03-11	Standard	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
10	Cape Winelands Schools Chess - Trials 1 2023 (U15 Boys)	2023-02-25	2023-02-25	Standard	Cape Winelands (WCW)	5	5	3.5	Yes	Analysis
11	Western Cape Schools 2022 (U13 Boys)	2022-05-28	2022-05-29	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
12	Cape Winelands Schools 2022 (U13 Boys)	2022-03-12	2022-03-12	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis
13	Central Winelands Schools Individual Trials 2022 (U13 Boys)	2022-02-19	2022-02-19	Rapid	Cape Winelands (WCW)	5	4	3	Yes	Analysis
14	Cape Winelands Schools Closed 2021 (U13 Boys)	2021-09-24	2021-09-24	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
15	Nelson Mandela Rapid 2020 (Primary School)	2020-02-01	2020-02-01	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
16	Cape Winelands Schools Trials 1 2020 (U11 Boys)	2020-02-08	2020-02-08	Rapid	Cape Winelands (WCW)	6	6	5	Yes	Analysis
17	Western Cape Top Schools 2019 (U11 Mix)	2019-08-31	2019-09-01	Standard	Cape Winelands (WCW)	5	5	2.5	Yes	Analysis
18	2019 Western Province League (D)	2019-07-27	2019-09-07	Standard	Cape Town (WCT)	11	1	0.5	Yes	Analysis
19	Cape Winelands Schools - Top Schools 2019 (U11 Mix)	2019-07-27	2019-07-27	Rapid	Cape Winelands (WCW)	5	4	4	Yes	Analysis
20	Western Cape Schools Individuals 2019 (U11 Boys)	2019-05-18	2019-05-19	Standard	Eden (WEG)	6	6	3.5	Yes	Analysis
21	Cape Winelands Schools Closed 2019 (U11 Boys)	2019-03-16	2019-03-17	Standard	Cape Winelands (WCW)	7	7	6	Yes	Analysis
22	CW Schools Open 2019 (U11 Boys)	2019-02-02	2019-02-02	Rapid	Cape Winelands (WCW)	6	6	4	Yes	Analysis
23	South African Junior Team Championships 2018 (U10A)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	5	Yes	Analysis
24	Western Cape Kings & Queens 2018 (Boys)	2018-10-20	2018-10-20	Rapid	Cape Winelands (WCW)	5	3	1.5	Yes	Analysis
25	Courtrai Young Masters 2018 (U10)	2018-10-27	2018-10-27	Rapid	Cape Winelands (WCW)	7	5	5	Yes	Analysis
26	2018 Western Province League (C)	2018-08-04	2018-09-15	Standard	Cape Town (WCT)	11	4	0	Yes	Analysis
27	Caledon Open 2018 (U8+U10)	2018-09-29	2018-09-29	Standard	Overberg (WOS)	5	5	5	Yes	Analysis
28	Western Cape Top Schools 2018 (U11 Mix)	2018-08-25	2018-08-26	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
29	Cape Winelands Schools Chess - Top Schools 2018 (U9+U11 Mix)	2018-07-28	2018-07-28	Rapid	Cape Winelands (WCW)	5	4	4	Yes	Analysis
30	Drakenstein Dragons Rapid 2018 (U13)	2018-06-09	2018-06-09	Rapid	Cape Winelands (WCW)	7	7	4	Yes	Analysis
31	Western Cape Schools Individuals 2018 (U9 Boys)	2018-05-19	2018-05-20	Standard	Overberg (WOS)	6	6	5	Yes	Analysis
32	Inter Regional 2018 (U10 Team)	2018-05-04	2018-05-05	Standard	Frances Baard (NCF)	5	5	5	Yes	Analysis
33	Cape Winelands Schools Trials 1 2018 (U9 Boys)	2018-03-03	2018-03-03	Rapid	Cape Winelands (WCW)	6	6	5	Yes	Analysis
34	Cape Winelands Schools Prestige 2018 (U9 Boys)	2018-03-24	2018-03-25	Standard	Cape Winelands (WCW)	7	7	6	Yes	Analysis
35	2018 Steinitz Chess Festival (B)	2018-03-21	2018-03-25	Standard	Cape Town (WCT)	7	4	2	Yes	Analysis
36	Mandela Drakenstein Mgt Area Rapid Chess 2018 (Primary School)	2018-02-03	2018-02-03	Rapid	Cape Winelands (WCW)	7	7	5.5	Yes	Analysis
37	South African Junior Wildcard Championships 2017 (U10 Open)	2018-01-09	2018-01-12	Standard	4 Knights (4K)	7	6	4	Yes	Analysis
38	South African Junior Team Championships 2017 (U10A)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	6	6	Yes	Analysis

#	Games	Start				End
1	13	Tournament Cape Winelands Schools Prestige 2018				Tournament Western Cape Schools Individuals 2018
		date 2018-03-24	rnd 3	type Standard	result 1	date 2018-05-19	rnd 3	type Standard	result 1
		Opponent Kruger, A (Aiden)				Opponent Kruger, A (Aiden)
2	10	Tournament Cape Winelands Schools Closed 2019				Tournament Western Cape Schools Individuals 2019
		date 2019-03-16	rnd 2	type Standard	result 1	date 2019-05-18	rnd 4	type Standard	result 0.5
		Opponent Boden, J (Joshua)				Opponent Allie, I (Ishmaeel)
3	8	Tournament Western Cape Kings & Queens 2018				Tournament South African Junior Team Championships 2018
		date 2018-10-20	rnd 4	type Rapid	result 0.5	date 2018-12-16	rnd 2	type Standard	result 1
		Opponent Spiller, C (Caden)				Opponent Nel, JB (Janko)

#	Games	Start				End
1	13	Tournament Cape Winelands Schools Prestige 2018				Tournament Western Cape Schools Individuals 2018
		date 2018-03-24	rnd 3	type Standard	result 1	date 2018-05-19	rnd 3	type Standard	result 1
		Opponent Kruger, A (Aiden)				Opponent Kruger, A (Aiden)
2	10	Tournament Cape Winelands Schools Closed 2019				Tournament Western Cape Schools Individuals 2019
		date 2019-03-16	rnd 2	type Standard	result 1	date 2019-05-18	rnd 4	type Standard	result 0.5
		Opponent Boden, J (Joshua)				Opponent Allie, I (Ishmaeel)
3	7	Tournament Caledon Open 2018				Tournament South African Junior Team Championships 2018
		date 2018-09-29	rnd 1	type Standard	result 1	date 2018-12-16	rnd 2	type Standard	result 1
		Opponent De Villiers, D (Daniella)				Opponent Nel, JB (Janko)

#	Games	Start				End
1	7	Tournament Western Cape Kings & Queens 2018				Tournament CW Schools Open 2019
		date 2018-10-20	rnd 4	type Rapid	result 0.5	date 2019-02-02	rnd 1	type Rapid	result 1
		Opponent Spiller, C (Caden)				Opponent Du Toit, S (Schalk)
2	6	Tournament Cape Winelands Schools - Top Schools 2019				Tournament Nelson Mandela Rapid 2020
		date 2019-07-27	rnd 1	type Rapid	result 1	date 2020-02-01	rnd 2	type Rapid	result 1
		Opponent Du Toit, S (Schalk)				Opponent Govender, D (Deresh)
3	5	Tournament Central Winelands Schools Individual Trials 2022				Tournament Cape Winelands Schools - HS Trials 1 2024
		date 2022-02-19	rnd 4	type Rapid	result 1	date 2024-02-17	rnd 4	type Rapid	result 1
		Opponent Rohrs, S (Sam)				Opponent De Klerk, H (Hanro)

No games found.

#	Games	Start				End

#	Games	Start				End
1	13	Tournament Cape Winelands Schools Prestige 2018				Tournament Western Cape Schools Individuals 2018
		date 2018-03-24	rnd 3	type Standard	result 1	date 2018-05-19	rnd 3	type Standard	result 1
		Opponent Kruger, A (Aiden)				Opponent Kruger, A (Aiden)
2	9	Tournament Cape Winelands Schools Closed 2019				Tournament Western Cape Schools Individuals 2019
		date 2019-03-16	rnd 2	type Standard	result 1	date 2019-05-18	rnd 3	type Standard	result 1
		Opponent Boden, J (Joshua)				Opponent Solomon, D (Daniel)
3	7	Tournament Courtrai Young Masters 2018				Tournament South African Junior Team Championships 2018
		date 2018-10-27	rnd 1	type Rapid	result 1	date 2018-12-16	rnd 2	type Standard	result 1
		Opponent Coulbanis, K (Kosta)				Opponent Nel, JB (Janko)

#	Games	Start				End
1	13	Tournament Cape Winelands Schools Prestige 2018				Tournament Western Cape Schools Individuals 2018
		date 2018-03-24	rnd 3	type Standard	result 1	date 2018-05-19	rnd 3	type Standard	result 1
		Opponent Kruger, A (Aiden)				Opponent Kruger, A (Aiden)
2	9	Tournament Cape Winelands Schools Closed 2019				Tournament Western Cape Schools Individuals 2019
		date 2019-03-16	rnd 2	type Standard	result 1	date 2019-05-18	rnd 3	type Standard	result 1
		Opponent Boden, J (Joshua)				Opponent Solomon, D (Daniel)
3	7	Tournament Caledon Open 2018				Tournament South African Junior Team Championships 2018
		date 2018-09-29	rnd 1	type Standard	result 1	date 2018-12-16	rnd 2	type Standard	result 1
		Opponent De Villiers, D (Daniella)				Opponent Nel, JB (Janko)

#	Games	Start				End
1	6	Tournament Cape Winelands Schools - Top Schools 2019				Tournament Nelson Mandela Rapid 2020
		date 2019-07-27	rnd 1	type Rapid	result 1	date 2020-02-01	rnd 2	type Rapid	result 1
		Opponent Du Toit, S (Schalk)				Opponent Govender, D (Deresh)
2	6	Tournament Courtrai Young Masters 2018				Tournament CW Schools Open 2019
		date 2018-10-27	rnd 1	type Rapid	result 1	date 2019-02-02	rnd 1	type Rapid	result 1
		Opponent Coulbanis, K (Kosta)				Opponent Du Toit, S (Schalk)
3	5	Tournament Central Winelands Schools Individual Trials 2022				Tournament Cape Winelands Schools - HS Trials 1 2024
		date 2022-02-19	rnd 4	type Rapid	result 1	date 2024-02-17	rnd 4	type Rapid	result 1
		Opponent Rohrs, S (Sam)				Opponent De Klerk, H (Hanro)

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	Michiel ,RRJ (Raidan Reilly John)	9	2	-236.1	2	1	0	7	1	-303.6	0	0	0
1	Michiel ,RRJ (Raidan Reilly John)	9	1354.3	1118.1	2	1243.9	1354.3	7	1276.3	1050.7	0	0	0
2	Kruger ,A (Aiden)	6	6	425	3	3	425	3	3	425	0	0	0
2	Kruger ,A (Aiden)	6	1203.2	1628.2	3	1165.1	1628.2	3	1242.4	1628.2	0	0	0
3	Bester ,C (Christoff)	5	4.5	340	4	3.5	318.8	1	1	425	0	0	0
3	Bester ,C (Christoff)	5	1126.4	1466.4	4	1041.1	1445.1	1	1105.2	1551.4	0	0	0
4	Lielieveld ,J (Jadrian)	5	0	-425	2	0	-425	3	0	-425	0	0	0
4	Lielieveld ,J (Jadrian)	5	1521.7	1096.7	2	1377.6	1096.7	3	1402	1096.7	0	0	0
5	Samuels ,R (Reagan)	4	3	212.5	1	1	425	3	2	141.7	0	0	0
5	Samuels ,R (Reagan)	4	1127.8	1340.3	1	906.6	1552.8	3	1163.5	1269.5	0	0	0
6	Valentine ,L (Luke)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
6	Valentine ,L (Luke)	3	1517.3	1375.6	3	1483.8	1375.6	0	0	0	0	0	0
7	Potgieter ,W (Werne)	3	0	-425	3	0	-425	0	0	0	0	0	0
7	Potgieter ,W (Werne)	3	1497	1072	3	1484.8	1072	0	0	0	0	0	0
8	Neethling ,S (Sean)	3	3	425	3	3	425	0	0	0	0	0	0
8	Neethling ,S (Sean)	3	1145	1570	3	1055.1	1570	0	0	0	0	0	0
9	Oosthuizen ,E (Ethan)	3	0	-425	2	0	-425	1	0	-425	0	0	0
9	Oosthuizen ,E (Ethan)	3	1566.4	1141.4	2	1614.4	1141.4	1	1358.7	1141.4	0	0	0
10	Palmer ,C (Cheslin)	3	0	-425	1	0	-425	2	0	-425	0	0	0
10	Palmer ,C (Cheslin)	3	1199.3	774.3	1	1520.8	774.3	2	1055.4	774.3	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Willis, C (Cronan)

Ratings

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Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms