Chess South Africa Ratings Database

PLAYER PAGE

Personal

De Villiers, J (Juan)

Chess SA id

109082809

FIDE id

Date of birth

2009-03-19 (U18)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2020-01-08

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1236.1	1225.2	624	624
Raw rating	1236.1	1225.2	624	624
Weighted rating	1236.1	1225.2	624	624
Weighted performance	322.3	319.5	0	0
Floor	736.1	725.2	500	500
K-factor	36	36	40	40
Min/Max rating change allowed	157.5	160	376.7	376.7
Highest rating	1244.1 2019-10-01	1237.8 2019-10-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1236.1 2024-02-01	1225.2 2024-02-01	624 2024-02-01	624 2024-02-01
Highest weighted rating	1236.1 2024-02-01	1225.2 2024-02-01	624 2024-11-01	624 2024-11-01
Highest weighted performance	1244.1 2019-10-01	1237.8 2019-10-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1236.1	1225.2	624	624
Analysis
Rating	1236.1	1225.2	624	624
Raw rating	1236.1	1225.2	624	624
Weighted rating	1236.1	1225.2	624
Weighted performance	322.3	319.5	0
K-factor	36	36	40	40
Floor	736.1	725.2	500	500
Max/Min rating change allowed	157.5	160	376.7	376.7
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	1236.1	1225.2	624	624
New weighted rating	1236.1	1225.2	624	624
New weighted performance	321.9	319.1	0	0
Temp new rating	1236.1	1225.2	624	624
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1236.1	1225.2	624	624
New K-factor	36	36	40	40
New floor	736.1	725.2	500	500

Item	Main	Standard
	0	0
	0	0
	0	0
	0	0
	0	0
	0	0
History	138	138

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	107	54	50.47	4	1096.1	1100.1
Standard	107	54	50.47	4	1096.1	1100.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1236.1	1225.2	624	624
2025-09-01	1236.1	1225.2	624	624
2025-08-01	1236.1	1225.2	624	624
2025-07-01	1236.1	1225.2	624	624
2025-06-01	1236.1	1225.2	624	624
2025-05-01	1236.1	1225.2	624	624
2025-04-01	1236.1	1225.2	624	624
2025-03-01	1236.1	1225.2	624	624
2025-02-01	1236.1	1225.2	624	624
2025-01-01	1236.1	1225.2	624	624
2024-12-01	1236.1	1225.2	624	624
2024-11-01	1236.1	1225.2	624	624
2024-10-01	1236.1	1225.2	624	624
2024-09-01	1236.1	1225.2	624	624
2024-08-01	1236.1	1225.2	624	624
2024-07-01	1236.1	1225.2	624	624
2024-06-01	1236.1	1225.2	624	624
2024-08-01	1236.1	1225.2	624	624
2024-04-01	1236.1	1225.2	624	624
2024-03-01	1236.1	1225.2	624	624
2024-02-01	1236.1	1225.2	624	624
2024-01-01	1236.1	1225.2	624	624
2023-12-01	1236.1	1225.2	624	624
2023-11-01	1236.1	1225.2	624	624

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	2019 South African Junior Team Championships (U12B)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
2	GJM vs GE Inter Region 2019 (U12B)	2019-10-05	2019-10-05	Standard	Johannesburg Metro (GJM)	5	5	4.5	Yes	Analysis
3	JNW Club - Maragon Open 2019 (C)	2019-08-03	2019-08-03	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
4	JHB Metro Closed 2019 (U12)	2019-07-27	2019-07-28	Standard	Johannesburg Metro (GJM)	6	6	3	Yes	Analysis
5	Fonties Challange 2019 (U11)	2019-06-08	2019-06-08	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
6	Chess Heroes Junior Tournament 2019 (A)	2019-06-22	2019-06-22	Standard	Johannesburg Metro (GJM)	5	5	1.5	Yes	Analysis
7	The Metro Open 2019 (Masters)	2019-05-25	2019-05-26	Standard	Johannesburg Metro (GJM)	6	6	3	Yes	Analysis
8	JNW Club - Bryanston Open 2 2019 (C)	2019-05-11	2019-05-11	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis
9	Chessnuts Under 1200 6 April 2019 (Kings)	2019-04-06	2019-04-06	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
10	Ekurhuleni Trials 2 2019 (U12)	2019-04-27	2019-04-27	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
11	South African Junior Team Championships 2018 (U10B)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
12	JNW Club - Maragon Open 2018 (U10)	2018-08-04	2018-08-04	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
13	Chessnuts - Under 1000 Ratings Tournament 2018 (A)	2018-07-21	2018-07-21	Standard	Johannesburg Metro (GJM)	5	4	0	Yes	Analysis
14	JHB Metro Junior Closed 2018 (U10)	2018-07-28	2018-07-29	Standard	Johannesburg Metro (GJM)	6	6	4	Yes	Analysis
15	Boksburg Chess Club Open 2018 (U10)	2018-07-14	2018-07-14	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
16	JNW Club - Unika Scholar 2018 (U10)	2018-06-02	2018-06-02	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
17	2018 Capablanca Swiss (D)	2018-04-27	2018-04-27	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
18	JNW Club - Linden Open 2018 (U10)	2018-04-14	2018-04-14	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
19	JNW Club - Trinityhouse Randpark Ridge Open 2018 (U10)	2018-03-24	2018-03-24	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
20	South African Junior Team Championships 2017 (U10B)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	1.5	Yes	Analysis

#	Games	Start				End
1	9	Tournament JNW Club - Maragon Open 2019				Tournament 2019 South African Junior Team Championships
		date 2019-08-03	rnd 4	type Standard	result 1	date 2020-01-04	rnd 2	type Standard	result 1
		Opponent Henry, GA (Georgia Anne)				Opponent Ramalahla, OP (Oratilwe)
2	6	Tournament JHB Metro Junior Closed 2018				Tournament JNW Club - Maragon Open 2018
		date 2018-07-28	rnd 3	type Standard	result 1	date 2018-08-04	rnd 2	type Standard	result 1
		Opponent Van Der Spuy, C (Christiaan)				Opponent Monastursky, D (Daniel)
3	5	Tournament Chessnuts Under 1200 6 April 2019				Tournament Ekurhuleni Trials 2 2019
		date 2019-04-06	rnd 3	type Standard	result 1	date 2019-04-27	rnd 2	type Standard	result 1
		Opponent Smith, Z (Zion)				Opponent Desmore, K (Kyle)

#	Games	Start				End
1	9	Tournament JNW Club - Maragon Open 2019				Tournament 2019 South African Junior Team Championships
		date 2019-08-03	rnd 4	type Standard	result 1	date 2020-01-04	rnd 2	type Standard	result 1
		Opponent Henry, GA (Georgia Anne)				Opponent Ramalahla, OP (Oratilwe)
2	6	Tournament JHB Metro Junior Closed 2018				Tournament JNW Club - Maragon Open 2018
		date 2018-07-28	rnd 3	type Standard	result 1	date 2018-08-04	rnd 2	type Standard	result 1
		Opponent Van Der Spuy, C (Christiaan)				Opponent Monastursky, D (Daniel)
3	5	Tournament Chessnuts Under 1200 6 April 2019				Tournament Ekurhuleni Trials 2 2019
		date 2019-04-06	rnd 3	type Standard	result 1	date 2019-04-27	rnd 2	type Standard	result 1
		Opponent Smith, Z (Zion)				Opponent Desmore, K (Kyle)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament JNW Club - Maragon Open 2019				Tournament GJM vs GE Inter Region 2019
		date 2019-08-03	rnd 4	type Standard	result 1	date 2019-10-05	rnd 3	type Standard	result 1
		Opponent Henry, GA (Georgia Anne)				Opponent Hawkins, J (Joshua)
2	5	Tournament Chessnuts Under 1200 6 April 2019				Tournament Ekurhuleni Trials 2 2019
		date 2019-04-06	rnd 3	type Standard	result 1	date 2019-04-27	rnd 2	type Standard	result 1
		Opponent Smith, Z (Zion)				Opponent Desmore, K (Kyle)
3	4	Tournament South African Junior Team Championships 2018				Tournament South African Junior Team Championships 2018
		date 2018-12-17	rnd 4	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Mogashoa, MR (Mahlonamela)				Opponent Marais, JS (Jacobus)

#	Games	Start				End
1	5	Tournament JNW Club - Maragon Open 2019				Tournament GJM vs GE Inter Region 2019
		date 2019-08-03	rnd 4	type Standard	result 1	date 2019-10-05	rnd 3	type Standard	result 1
		Opponent Henry, GA (Georgia Anne)				Opponent Hawkins, J (Joshua)
2	5	Tournament Chessnuts Under 1200 6 April 2019				Tournament Ekurhuleni Trials 2 2019
		date 2019-04-06	rnd 3	type Standard	result 1	date 2019-04-27	rnd 2	type Standard	result 1
		Opponent Smith, Z (Zion)				Opponent Desmore, K (Kyle)
3	4	Tournament South African Junior Team Championships 2018				Tournament South African Junior Team Championships 2018
		date 2018-12-17	rnd 4	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Mogashoa, MR (Mahlonamela)				Opponent Marais, JS (Jacobus)

No games found.

#	Games	Start				End

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	Sandenbergh ,RF (Francois)	4	2	0	4	2	0	0	0	0	0	0	0
1	Sandenbergh ,RF (Francois)	4	885.2	885.2	4	897.5	885.2	0	0	0	0	0	0
2	Van Der Sandt ,I (Iliana)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
2	Van Der Sandt ,I (Iliana)	3	967.7	967.7	3	958	967.7	0	0	0	0	0	0
3	Rossouw ,W (Wessel Johannes)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
3	Rossouw ,W (Wessel Johannes)	3	1056.2	914.5	3	1045.3	914.5	0	0	0	0	0	0
4	Van Zyl ,B (Benjamin)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
4	Van Zyl ,B (Benjamin)	3	884.1	742.4	3	891.7	742.4	0	0	0	0	0	0
5	Voigt ,D (Daniel)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Voigt ,D (Daniel)	2	1215.4	790.4	2	1217.6	790.4	0	0	0	0	0	0
6	Van Heerden ,F (Freddie)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Van Heerden ,F (Freddie)	2	1257.1	832.1	2	1257.9	832.1	0	0	0	0	0	0
7	Bennie ,J (Johannes)	2	2	425	2	2	425	0	0	0	0	0	0
7	Bennie ,J (Johannes)	2	984.3	1409.3	2	981	1409.3	0	0	0	0	0	0
8	Goldstuck ,Z (Zianda Chelsea)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Goldstuck ,Z (Zianda Chelsea)	2	1179.2	754.2	2	1175.5	754.2	0	0	0	0	0	0
9	Onyemah ,C (Chioma)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
9	Onyemah ,C (Chioma)	2	1127.4	914.9	2	1083.2	914.9	0	0	0	0	0	0
10	Roetz ,K (Kyle)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
10	Roetz ,K (Kyle)	2	890.1	677.6	2	898	677.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

De Villiers, J (Juan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms