Chess South Africa Ratings Database

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Personal

Gruenenfelder, W (Werni)

Chess SA id

109088372

FIDE id

Date of birth

2009-06-16 (U18)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-05-10

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1188.7	1166.2	1200	1200
Raw rating	1188.7	1166.2	1200	1200
Weighted rating	1186.2	1161.1	1189.8	1200
Weighted performance	914.5	885.1	0	0
Floor	813.8	824.3	720.3	700
K-factor	36	36	36	36
Min/Max rating change allowed	168.5	174	165.8	165.8
Highest rating	1313.8 2022-02-01	1324.3 2022-02-01	1220.3 2023-10-01	1200 2018-10-01
Highest raw rating	1313.8 2022-02-01	1324.3 2022-02-01	1220.3 2023-10-01	1200 2024-02-01
Highest weighted rating	1313.8 2023-04-01	1324.3 2023-04-01	1220.3 2023-11-01	1200 2018-10-01
Highest weighted performance	1275.1 2022-05-01	1296.9 2022-05-01	1206.9 2023-05-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1188.7	1166.2	1200	1200
Analysis
Rating	1188.7	1166.2	1200	1200
Raw rating	1188.7	1166.2	1200	1200
Weighted rating	1186.2	1161.1	1189.8
Weighted performance	914.5	885.1	0
K-factor	36	36	36	36
Floor	813.8	824.3	720.3	700
Max/Min rating change allowed	168.5	174	165.8	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	1188.7	1166.2	1200	1200
New weighted rating	1186.3	1161.5	1191.1	1200
New weighted performance	907.9	878.6	0	0
Temp new rating	1188.7	1166.2	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1188.7	1166.2	1200	1200
New K-factor	36	36	36	36
New floor	813.8	824.3	720.3	700

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	5	5	0	0
	5	5	0	0
	25	15	10	0
	41	34	7	0
	4	4	0	0
History	233	206	23	4

Games since
	Main 15	Standard 10		Rapid 5		Blitz 0
Gender	Male
Age group	U18
Region	Ekurhuleni (GE)
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	5	1.5	30	-170	1366.1	1196.1
Standard	5	1.5	30	-170	1366.1	1196.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	213	97	45.54	-37.9	1127.6	1089.7
Standard	196	88.5	45.15	-41.2	1117.7	1076.5
Rapid	17	8.5	50	0	1240.9	1240.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1188.7	1166.2	1200	1200
2025-09-30	1188.7	1166.2	1200	1200
2025-09-01	1188.7	1166.2	1200	1200
2025-08-01	1188.7	1166.2	1200	1200
2025-07-01	1188.7	1166.2	1200	1200
2025-06-01	1188.7	1166.2	1200	1200
2025-05-01	1189.1	1161.3	1200	1200
2025-04-01	1189.1	1161.3	1200	1200
2025-03-01	1189.1	1161.3	1200	1200
2025-02-01	1189.1	1161.3	1179.3	1200
2025-01-01	1180.2	1153.7	1173.9	1200
2024-12-01	1180.2	1153.7	1173.9	1200
2024-11-01	1180.2	1153.7	1173.9	1200
2024-10-01	1180.2	1153.7	1173.9	1200
2024-09-01	1180.2	1153.7	1173.9	1200
2024-08-01	1180.2	1153.7	1173.9	1200
2024-07-01	1180.2	1153.7	1173.9	1200
2024-09-01	1180.2	1153.7	1173.9	1200
2024-05-01	1180.2	1153.7	1173.9	1200
2024-04-01	1180.2	1153.7	1173.9	1200
2024-03-01	1180.2	1153.7	1173.9	1200
2024-02-01	1180.2	1153.7	1173.9	1200
2024-01-01	1216.7	1186.8	1173.9	1200
2023-12-01	1216.7	1186.8	1173.9	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	2025 Tshwane South School District Individual Finals (D4) (U18 Boys)	2025-05-10	2025-05-10	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane South School District Individual Finals (D4) (U18 Boys)	2025-05-10	2025-05-10	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
2	2024 Gauteng Inter-Region Chess Championship (U16B)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
3	CCC Midstream Rapid 2023	2023-11-27	2023-11-27	Rapid	Tshwane (GTP)	5	5	1.5	Yes	Analysis
4	Gauteng Open Arnold Classic 2023 (U16)	2023-05-19	2023-05-19	Rapid	Tshwane (GTP)	5	5	3	Yes	Analysis
5	2023 Tshwane South School District CLOSED Individual Championships (U15 Open)	2023-04-22	2023-04-22	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
6	2023 Milos Ristic Open Tournament (C)	2023-04-27	2023-04-27	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
7	Ekurhuleni Springs Open 4 March 2023 (C)	2023-03-04	2023-03-04	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
8	2022 South African Junior Team Chess Championships (U14 Open)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	7	3	Yes	Analysis
9	D4 Play Offs 2022 (U13)	2022-07-30	2022-07-30	Standard	Tshwane (GTP)	5	5	0	Yes	Analysis
10	Ekurhuleni Trials 2 2022 (U14)	2022-05-28	2022-05-28	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
11	D4 Individuals 2022 (U13 Open)	2022-04-23	2022-04-23	Rapid	Tshwane (GTP)	7	7	4	Yes	Analysis
12	2022 Gauteng Interregion (U14 Open)	2022-02-26	2022-02-26	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
13	2022 Tshwane Chess Open Registration Tournament (D1)	2022-01-29	2022-01-29	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
14	Ekurhuleni Chess Open 2022 (D)	2022-01-08	2022-01-09	Standard	Ekurhuleni (GE)	7	7	6	Yes	Analysis
15	Ekurhuleni Trials (3)	2021-11-06	2021-11-06	Standard	Ekurhuleni (GE)	5	4	1.5	Yes	Analysis
16	Ekurhuleni Chess Kempton Park Open 2020 (C)	2020-11-21	2020-11-21	Standard	Ekurhuleni (GE)	5	0	0	No	Analysis
17	2020 Waterkloof Open (D)	2020-02-29	2020-03-01	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
18	2020 Blou Bul (D)	2020-02-15	2020-02-15	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
19	2020 Registration Tournament (D)	2020-01-25	2020-01-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
20	2019 South African Junior Team Championships (U12C)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	3.5	Yes	Analysis
21	2019 TC SAJCC Prep Tournament (B)	2019-11-30	2019-11-30	Standard	Tshwane (GTP)	5	4	1	Yes	Analysis
22	2019 Etienne Lewis Trials (U12 Boys)	2019-08-30	2019-09-01	Standard	Tshwane (GTP)	7	5	2	Yes	Analysis
23	2019 Centurion Open (D)	2019-09-28	2019-09-28	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
24	2019 Swartkop Club Closed Championship (A)	2019-08-01	2019-08-15	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
25	2019 Alekhine Open (D)	2019-08-09	2019-08-10	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
26	Boksburg Chess Club Open 2019 (C)	2019-07-13	2019-07-13	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
27	2019 D4 Individual Finals (U11 Mixed)	2019-03-09	2019-03-09	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
28	2019 Constantia Park Open (C)	2019-02-09	2019-02-09	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
29	2019 Tshwane Chess Registration Tournament (C)	2019-01-26	2019-01-26	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
30	2019 Centurion Club Tournament Open	2019-01-23	2019-01-30	Standard	Tshwane (GTP)	6	1	0	Yes	Analysis
31	Boksburg Open 2019 (C)	2019-01-19	2019-01-19	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
32	2018 Tshwane Inter Region (U10F)	2018-12-01	2018-12-01	Standard	Cape Town (WCT)	5	5	5	Yes	Analysis
33	South African Junior Team Championships 2018 (U10B)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
34	2018 Lardies Ope (D)	2018-10-27	2018-10-27	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
35	2018 Gauteng North Open (D)	2018-10-20	2018-10-21	Standard	Tshwane (GTP)	5	4	1	Yes	Analysis
36	2018 Etienne Lewis Trials (U10 Boys)	2018-08-31	2018-09-02	Standard	Tshwane (GTP)	7	6	1	Yes	Analysis
37	2018 Alekhine Open (D)	2018-08-09	2018-08-11	Standard	Tshwane (GTP)	6	6	3	Yes	Analysis
38	2018 Menlo Open Chess Tournament (D)	2018-07-21	2018-07-21	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
39	2018 Swartkop Open (D)	2018-06-23	2018-06-23	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
40	2018 Lubowski Open (D)	2018-05-12	2018-05-12	Standard	Tshwane (GTP)	5	4	0	Yes	Analysis
41	2018 Capablanca Swiss (D)	2018-04-27	2018-04-27	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
42	2018 Constantia Park Open (D)	2018-02-10	2018-02-10	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
43	2018 Tshwane Registration Open Chess Tournament (E)	2018-01-27	2018-01-27	Standard	Tshwane (GTP)	5	4	3	Yes	Analysis

#	Games	Start				End
1	12	Tournament 2018 Gauteng North Open				Tournament South African Junior Team Championships 2018
		date 2018-10-21	rnd 5	type Standard	result 1	date 2018-12-16	rnd 1	type Standard	result 1
		Opponent Fourie, ZH (Zian Henno)				Opponent Chetty, N (Neha)
2	9	Tournament Ekurhuleni Chess Open 2022				Tournament 2022 Tshwane Chess Open Registration Tournament
		date 2022-01-08	rnd 3	type Standard	result 1	date 2022-01-29	rnd 4	type Standard	result 1
		Opponent Sauls, N (Nathan)				Opponent Webb, A (Abbygail)
3	4	Tournament 2022 South African Junior Team Chess Championships				Tournament Ekurhuleni Springs Open 4 March 2023
		date 2022-12-07	rnd 6	type Standard	result 0.5	date 2023-03-04	rnd 2	type Standard	result 1
		Opponent Venter, D (Dian)				Opponent Bhika, J (Jyotikka)

#	Games	Start				End
1	12	Tournament 2018 Gauteng North Open				Tournament South African Junior Team Championships 2018
		date 2018-10-21	rnd 5	type Standard	result 1	date 2018-12-16	rnd 1	type Standard	result 1
		Opponent Fourie, ZH (Zian Henno)				Opponent Chetty, N (Neha)
2	9	Tournament Ekurhuleni Chess Open 2022				Tournament 2022 Tshwane Chess Open Registration Tournament
		date 2022-01-08	rnd 3	type Standard	result 1	date 2022-01-29	rnd 4	type Standard	result 1
		Opponent Sauls, N (Nathan)				Opponent Webb, A (Abbygail)
3	4	Tournament 2022 South African Junior Team Chess Championships				Tournament Ekurhuleni Springs Open 4 March 2023
		date 2022-12-07	rnd 6	type Standard	result 0.5	date 2023-03-04	rnd 2	type Standard	result 1
		Opponent Venter, D (Dian)				Opponent Bhika, J (Jyotikka)

#	Games	Start				End
1	2	Tournament CCC Midstream Rapid 2023				Tournament CCC Midstream Rapid 2023
		date 2023-11-27	rnd 3	type Rapid	result 1	date 2023-11-27	rnd 4	type Rapid	result 0.5
		Opponent Makhubedu, O (Oatile)				Opponent Vosloo, D (Dewaal)
2	2	Tournament Gauteng Open Arnold Classic 2023				Tournament Gauteng Open Arnold Classic 2023
		date 2023-05-19	rnd 1	type Rapid	result 1	date 2023-05-19	rnd 2	type Rapid	result 1
		Opponent Mohlauli, Y (Yongama)				Opponent Kam Tonoue, C (Clovisson)
3	2	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 5	type Rapid	result 1	date 2022-04-23	rnd 6	type Rapid	result 1
		Opponent Van Der Merwe, R (Ruben)				Opponent Jooste, J (Josh)

No games found.

#	Games	Start				End

#	Games	Start				End
1	9	Tournament Ekurhuleni Chess Open 2022				Tournament 2022 Tshwane Chess Open Registration Tournament
		date 2022-01-08	rnd 3	type Standard	result 1	date 2022-01-29	rnd 4	type Standard	result 1
		Opponent Sauls, N (Nathan)				Opponent Webb, A (Abbygail)
2	6	Tournament 2018 Tshwane Inter Region				Tournament South African Junior Team Championships 2018
		date 2018-12-01	rnd 1	type Standard	result 1	date 2018-12-16	rnd 1	type Standard	result 1
		Opponent Van Der Walt, AJ (Antonie)				Opponent Chetty, N (Neha)
3	4	Tournament 2019 Swartkop Club Closed Championship				Tournament 2019 Alekhine Open
		date 2019-08-01	rnd 2	type Standard	result 1	date 2019-08-09	rnd 1	type Standard	result 1
		Opponent Reyneke, T (Talia)				Opponent Hlongwane, M (Mpho)

#	Games	Start				End
1	9	Tournament Ekurhuleni Chess Open 2022				Tournament 2022 Tshwane Chess Open Registration Tournament
		date 2022-01-08	rnd 3	type Standard	result 1	date 2022-01-29	rnd 4	type Standard	result 1
		Opponent Sauls, N (Nathan)				Opponent Webb, A (Abbygail)
2	6	Tournament 2018 Tshwane Inter Region				Tournament South African Junior Team Championships 2018
		date 2018-12-01	rnd 1	type Standard	result 1	date 2018-12-16	rnd 1	type Standard	result 1
		Opponent Van Der Walt, AJ (Antonie)				Opponent Chetty, N (Neha)
3	4	Tournament 2019 Swartkop Club Closed Championship				Tournament 2019 Alekhine Open
		date 2019-08-01	rnd 2	type Standard	result 1	date 2019-08-09	rnd 1	type Standard	result 1
		Opponent Reyneke, T (Talia)				Opponent Hlongwane, M (Mpho)

#	Games	Start				End
1	2	Tournament Gauteng Open Arnold Classic 2023				Tournament Gauteng Open Arnold Classic 2023
		date 2023-05-19	rnd 1	type Rapid	result 1	date 2023-05-19	rnd 2	type Rapid	result 1
		Opponent Mohlauli, Y (Yongama)				Opponent Kam Tonoue, C (Clovisson)
2	2	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 5	type Rapid	result 1	date 2022-04-23	rnd 6	type Rapid	result 1
		Opponent Van Der Merwe, R (Ruben)				Opponent Jooste, J (Josh)
3	2	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 1	type Rapid	result 1	date 2022-04-23	rnd 2	type Rapid	result 1
		Opponent Matthee, WD (William)				Opponent De Wet, L (Lambert Hugo)

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	Redelinghuys ,A (Ayden)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
1	Redelinghuys ,A (Ayden)	3	1160.9	1019.2	3	1141.6	1019.2	0	0	0	0	0	0
2	Reyneke ,T (Talia)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
2	Reyneke ,T (Talia)	3	1181.4	1323.1	3	1176.5	1323.1	0	0	0	0	0	0
3	Gerber ,J (Juandre)	3	0	-425	3	0	-425	0	0	0	0	0	0
3	Gerber ,J (Juandre)	3	961.7	536.7	3	938.5	536.7	0	0	0	0	0	0
4	Gruenenfelder ,S (Stiaan)	3	0.5	-283.3	2	0.5	-212.5	1	0	-425	0	0	0
4	Gruenenfelder ,S (Stiaan)	3	1254	970.6	2	1178.5	1041.5	1	984.4	829	0	0	0
5	Kushar ,T (Tristan)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Kushar ,T (Tristan)	2	1374.9	949.9	2	1373.4	949.9	0	0	0	0	0	0
6	Van Deventer ,NS (Nathaniel Steven)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Van Deventer ,NS (Nathaniel Steven)	2	1149.9	724.9	2	1142.4	724.9	0	0	0	0	0	0
7	Eygelaar ,L (Leila)	2	2	425	2	2	425	0	0	0	0	0	0
7	Eygelaar ,L (Leila)	2	1022.1	1447.1	2	986.4	1447.1	0	0	0	0	0	0
8	Jacobs ,A (Angelo)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Jacobs ,A (Angelo)	2	1097.3	672.3	2	1081.6	672.3	0	0	0	0	0	0
9	Mostert ,M (Mj)	2	2	425	2	2	425	0	0	0	0	0	0
9	Mostert ,M (Mj)	2	1007.7	1432.7	2	996.7	1432.7	0	0	0	0	0	0
10	Zunguzira ,P (Praise)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Zunguzira ,P (Praise)	2	1335.2	910.2	2	1338.7	910.2	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Gruenenfelder, W (Werni)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms