Chess South Africa Ratings Database

PLAYER PAGE

Personal

Gruenenfelder, S (Stiaan)

Chess SA id

108079040

FIDE id

Date of birth

2008-07-08 (U18)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1442.1

Item	Main	Standard	Rapid	Blitz
Rating	1446.9	1444.8	1051.9	694
Raw rating	1446.9	1444.8	1051.9	694
Weighted rating	1415	1404.5	1051.8	694
Weighted performance	1324	1324.9	0	0
Floor	946.9	944.8	551.9	500
K-factor	32	32	40	40
Min/Max rating change allowed	116.6	117	204.8	341
Highest rating	1447.5 2023-08-01	1444.8 2025-09-01	1342.8 2023-05-01	1200 2024-02-01
Highest raw rating	1446.9 2025-09-01	1444.8 2025-09-01	1051.9 2024-02-01	694 2024-02-01
Highest weighted rating	1437.7 2025-05-05	1430.4 2025-05-05	1051.9 2024-11-01	694 2024-11-01
Highest weighted performance	1447.5 2023-08-01	1443 2024-03-01	1342.8 2023-05-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1446.9	1444.8	1051.9	694
Analysis
Rating	1446.9	1444.8	1051.9	694
Raw rating	1446.9	1444.8	1051.9	694
Weighted rating	1415	1404.5	1051.8
Weighted performance	1324	1324.9	0
K-factor	32	32	40	40
Floor	946.9	944.8	551.9	500
Max/Min rating change allowed	116.6	117	204.8	341
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	1446.9	1444.8	1051.9	694
New weighted rating	1417.7	1407.9	1051.9	694
New weighted performance	1323.5	1324.5	0	0
Temp new rating	1446.9	1444.8	1051.9	694
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1446.9	1444.8	1051.9	694
New K-factor	32	32	40	40
New floor	946.9	944.8	551.9	500

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	10	10	0	0
	20	20	0	0
	37	27	10	0
	39	32	7	0
	10	10	0	0
History	306	279	23	4

Games since
	Main 35	Standard 30		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	1622		602		80
Male	1355		493		65
U18	272		115		13
U18 Male	236		97		11
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	10	5.5	55	42.5	1370.6	1413.1
Standard	10	5.5	55	42.5	1370.6	1413.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	184	107	58.15	69.3	1257.5	1326.8
Standard	167	96	57.49	63.6	1254.8	1318.4
Rapid	17	11	64.71	125	1284	1409
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1446.9	1444.8	1051.9	694
2025-09-01	1446.9	1444.8	1051.9	694
2025-08-01	1409.5	1397.2	1051.9	694
2025-07-01	1409.5	1397.1	1051.9	694
2025-06-01	1407.4	1394.6	1051.9	694
2025-05-01	1412.5	1402.6	1051.9	694
2025-04-01	1412.5	1402.6	1051.9	694
2025-03-01	1412.5	1402.6	1051.9	694
2025-02-01	1412.5	1402.6	1051.9	694
2025-01-01	1412.5	1402.6	1051.9	694
2024-12-01	1389.6	1372.5	1051.9	694
2024-11-01	1389.6	1372.5	1051.9	694
2024-10-01	1389.6	1372.5	1051.9	694
2024-09-01	1389.6	1372.5	1051.9	694
2024-08-01	1389.6	1372.5	1051.9	694
2024-07-01	1437.7	1430.4	1051.9	694
2024-06-01	1437.7	1430.4	1051.9	694
2024-08-01	1437.7	1430.4	1051.9	694
2024-04-01	1437.7	1430.4	1051.9	694
2024-03-01	1417.2	1406.1	1051.9	694
2024-02-01	1417.2	1406.1	1051.9	694
2024-01-01	1405.2	1391.1	1051.9	694
2023-12-01	1405.2	1391.1	1038.8	694
2023-11-01	1405.2	1391.1	1038.8	694

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 CLOSED League Championship (U17A)	2025-08-16	2025-08-16	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
2	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 CLOSED League Championship (U17A)	2025-08-16	2025-08-16	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
2	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
3	Gauteng Inter-Region at UJ 2024 (U18 Open)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
4	Ekurhuleni Trails 2 2024 (U18-U20)	2024-07-27	2024-07-27	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
5	2024 Lubowski Open Chess Tournament (C)	2024-03-23	2024-03-24	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
6	2024 Gauteng Inter-Region Chess Championship (U16A)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
7	CCC Midstream Rapid 2023	2023-11-27	2023-11-27	Rapid	Tshwane (GTP)	5	5	2.5	Yes	Analysis
8	2023 Gauteng Top Schools (U17 Mixed)	2023-08-19	2023-08-19	Standard	West Rand (GWR)	5	4	2.5	Yes	Analysis
9	2023 Tshwane South School District CLOSED League Championship (U17)	2023-07-29	2023-07-29	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
10	Gauteng Open Arnold Classic 2023 (U16)	2023-05-19	2023-05-19	Rapid	Tshwane (GTP)	5	5	4	Yes	Analysis
11	2023 Tshwane South School District CLOSED Individual Championships (U15 Open)	2023-04-22	2023-04-22	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
12	2023 Milos Ristic Open Tournament (B)	2023-04-27	2023-04-27	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
13	2023 South African Junior Closed Chess Championships (U16 Open)	2023-03-31	2023-04-04	Standard	Chess South Africa (CSA)	9	8	1	Yes	Analysis
14	2022 South African Junior Wild Card Chess Championships (U16 Open)	2022-12-09	2022-12-12	Standard	4 Knights (4K)	7	7	3.5	Yes	Analysis
15	2022 South African Junior Team Chess Championships (U16 Open)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	7	3.5	Yes	Analysis
16	Ekurhuleni Trials 2 2022 (U16)	2022-05-28	2022-05-28	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
17	D4 Individuals 2022 (U15 Open)	2022-04-23	2022-04-23	Rapid	Tshwane (GTP)	7	7	4.5	Yes	Analysis
18	CP Ope 2022 (C)	2022-02-19	2022-02-19	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
19	2022 Gauteng Interregion (U14 Open)	2022-02-26	2022-02-26	Standard	Tshwane (GTP)	5	3	1	Yes	Analysis
20	2022 Tshwane Chess Open Registration Tournament (C1)	2022-01-29	2022-01-29	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
21	Ekurhuleni Trials (3)	2021-11-06	2021-11-06	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
22	2021 Gauteng Schools Chess Championships (U13 Boys)	2021-10-16	2021-10-16	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
23	Ekurhuleni Chess Kempton Park Open 2020 (B)	2020-11-21	2020-11-21	Standard	Ekurhuleni (GE)	5	0	0	No	Analysis
24	2020 Waterkloof Open (C)	2020-02-29	2020-03-01	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
25	2020 Blou Bul (C)	2020-02-15	2020-02-15	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
26	2020 Registration Tournament (C)	2020-01-25	2020-01-25	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
27	2019 South African Junior Team Championships (U12B)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	2.5	Yes	Analysis
28	2019 TC SAJCC Prep Tournament (A)	2019-11-30	2019-11-30	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
29	2019 Etienne Lewis Trials (U12 Boys)	2019-08-30	2019-09-01	Standard	Tshwane (GTP)	7	5	4	Yes	Analysis
30	2019 Swartkop Club Closed Championship (A)	2019-08-01	2019-08-15	Standard	Tshwane (GTP)	5	5	4.5	Yes	Analysis
31	2019 Alekhine Open (C)	2019-08-09	2019-08-10	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
32	Boksburg Chess Club Open 2019 (C)	2019-07-13	2019-07-13	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
33	2018 D4 Tshwane North Individual Chess Championships (U11 Boys)	2018-03-10	2018-03-10	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
34	2018 Constantia Park Open (C)	2018-02-10	2018-02-10	Standard	Tshwane (GTP)	5	5	0	Yes	Analysis
35	2018 Tshwane Registration Open Chess Tournament (D)	2018-01-27	2018-01-27	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
36	South African Junior Team Championships 2017 (U10B)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	6	6	Yes	Analysis

#	Games	Start				End
1	10	Tournament 2019 Alekhine Open				Tournament 2019 Etienne Lewis Trials
		date 2019-08-09	rnd 2	type Standard	result 1	date 2019-09-01	rnd 7	type Standard	result 0.5
		Opponent Pillay, T (Tahir)				Opponent Reyneke, L (Luke)
2	8	Tournament South African Junior Team Championships 2017				Tournament 2018 Tshwane Registration Open Chess Tournament
		date 2018-01-04	rnd 1	type Standard	result 1	date 2018-01-27	rnd 2	type Standard	result 1
		Opponent Rosenberg, Z (Zachary)				Opponent Pillay, T (Tahir)
3	6	Tournament 2025 Tshwane South School District Individual Finals (D4)				Tournament 2025 Tshwane South School District CLOSED League Championship
		date 2025-05-10	rnd 5	type Standard	result 0.5	date 2025-08-16	rnd 5	type Standard	result 0.5
		Opponent Gruenenfelder, W (Werni)				Opponent Beyers, J (Jacobus)

#	Games	Start				End
1	10	Tournament 2019 Alekhine Open				Tournament 2019 Etienne Lewis Trials
		date 2019-08-09	rnd 2	type Standard	result 1	date 2019-09-01	rnd 7	type Standard	result 0.5
		Opponent Pillay, T (Tahir)				Opponent Reyneke, L (Luke)
2	8	Tournament South African Junior Team Championships 2017				Tournament 2018 Tshwane Registration Open Chess Tournament
		date 2018-01-04	rnd 1	type Standard	result 1	date 2018-01-27	rnd 2	type Standard	result 1
		Opponent Rosenberg, Z (Zachary)				Opponent Pillay, T (Tahir)
3	6	Tournament 2025 Tshwane South School District Individual Finals (D4)				Tournament 2025 Tshwane South School District CLOSED League Championship
		date 2025-05-10	rnd 5	type Standard	result 0.5	date 2025-08-16	rnd 5	type Standard	result 0.5
		Opponent Gruenenfelder, W (Werni)				Opponent Beyers, J (Jacobus)

#	Games	Start				End
1	4	Tournament D4 Individuals 2022				Tournament Gauteng Open Arnold Classic 2023
		date 2022-04-23	rnd 7	type Rapid	result 1	date 2023-05-19	rnd 3	type Rapid	result 1
		Opponent Ferreira, H (Hechter)				Opponent Ranchod, K (Kirat)
2	3	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 1	type Rapid	result 1	date 2022-04-23	rnd 3	type Rapid	result 1
		Opponent Holmes, E (Ethan)				Opponent Mcphail, R (Ryan)
3	2	Tournament CCC Midstream Rapid 2023				Tournament CCC Midstream Rapid 2023
		date 2023-11-27	rnd 2	type Rapid	result 0.5	date 2023-11-27	rnd 3	type Rapid	result 1
		Opponent Snyman, L (Luan)				Opponent Fine, J (Jad)

No games found.

#	Games	Start				End

#	Games	Start				End
1	8	Tournament South African Junior Team Championships 2017				Tournament 2018 Tshwane Registration Open Chess Tournament
		date 2018-01-04	rnd 1	type Standard	result 1	date 2018-01-27	rnd 2	type Standard	result 1
		Opponent Rosenberg, Z (Zachary)				Opponent Pillay, T (Tahir)
2	6	Tournament 2022 Tshwane Chess Open Registration Tournament				Tournament CP Ope 2022
		date 2022-01-29	rnd 2	type Standard	result 1	date 2022-02-19	rnd 2	type Standard	result 1
		Opponent Redelinghuys, M (Mia)				Opponent Dreyer, TF (Thomas)
3	6	Tournament 2019 Alekhine Open				Tournament 2019 Etienne Lewis Trials
		date 2019-08-09	rnd 2	type Standard	result 1	date 2019-08-30	rnd 1	type Standard	result 1
		Opponent Pillay, T (Tahir)				Opponent Muller, E (Emile)

#	Games	Start				End
1	8	Tournament South African Junior Team Championships 2017				Tournament 2018 Tshwane Registration Open Chess Tournament
		date 2018-01-04	rnd 1	type Standard	result 1	date 2018-01-27	rnd 2	type Standard	result 1
		Opponent Rosenberg, Z (Zachary)				Opponent Pillay, T (Tahir)
2	6	Tournament 2022 Tshwane Chess Open Registration Tournament				Tournament CP Ope 2022
		date 2022-01-29	rnd 2	type Standard	result 1	date 2022-02-19	rnd 2	type Standard	result 1
		Opponent Redelinghuys, M (Mia)				Opponent Dreyer, TF (Thomas)
3	6	Tournament 2019 Alekhine Open				Tournament 2019 Etienne Lewis Trials
		date 2019-08-09	rnd 2	type Standard	result 1	date 2019-08-30	rnd 1	type Standard	result 1
		Opponent Pillay, T (Tahir)				Opponent Muller, E (Emile)

#	Games	Start				End
1	4	Tournament D4 Individuals 2022				Tournament Gauteng Open Arnold Classic 2023
		date 2022-04-23	rnd 7	type Rapid	result 1	date 2023-05-19	rnd 3	type Rapid	result 1
		Opponent Ferreira, H (Hechter)				Opponent Ranchod, K (Kirat)
2	3	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 1	type Rapid	result 1	date 2022-04-23	rnd 3	type Rapid	result 1
		Opponent Holmes, E (Ethan)				Opponent Mcphail, R (Ryan)
3	1	Tournament CCC Midstream Rapid 2023				Tournament CCC Midstream Rapid 2023
		date 2023-11-27	rnd 5	type Rapid	result 1	date 2023-11-27	rnd 5	type Rapid	result 1
		Opponent Gruenenfelder, W (Werni)				Opponent Gruenenfelder, W (Werni)

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	Nason ,C (Cyle)	4	2	0	3	1	-141.7	1	1	425	0	0	0
1	Nason ,C (Cyle)	4	1223.8	1223.8	3	1261	1082.1	1	1200	1648.8	0	0	0
2	De Vries ,MA (Andrio)	3	0	-425	3	0	-425	0	0	0	0	0	0
2	De Vries ,MA (Andrio)	3	1556.6	1131.6	3	1550.9	1131.6	0	0	0	0	0	0
3	Gruenenfelder ,W (Werni)	3	2.5	283.3	2	1.5	212.5	1	1	425	0	0	0
3	Gruenenfelder ,W (Werni)	3	1147.1	1430.4	2	1082.7	1359.6	1	1220.3	1572.1	0	0	0
4	Pearson ,E (Ethan)	2	1	0	2	1	0	0	0	0	0	0	0
4	Pearson ,E (Ethan)	2	1249.8	1249.8	2	1210.6	1249.8	0	0	0	0	0	0
5	De Wet ,CR (Christiaan Rudolph)	2	1	0	2	1	0	0	0	0	0	0	0
5	De Wet ,CR (Christiaan Rudolph)	2	996.7	996.7	2	997.4	996.7	0	0	0	0	0	0
6	Yang ,A (Alex)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
6	Yang ,A (Alex)	2	1680.2	1467.7	2	1683	1467.7	0	0	0	0	0	0
7	Ziegenhagen ,V (Vian Luke)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Ziegenhagen ,V (Vian Luke)	2	1483.6	1058.6	2	1461.1	1058.6	0	0	0	0	0	0
8	Steyn ,T (Tjaart)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
8	Steyn ,T (Tjaart)	2	1487.9	1275.4	2	1497.8	1275.4	0	0	0	0	0	0
9	Pillay ,T (Tahir)	2	2	425	2	2	425	0	0	0	0	0	0
9	Pillay ,T (Tahir)	2	866.8	1291.8	2	864	1291.8	0	0	0	0	0	0
10	Du Plessis ,LD (Liam Douw)	2	1	0	2	1	0	0	0	0	0	0	0
10	Du Plessis ,LD (Liam Douw)	2	955.8	955.8	2	956.8	955.8	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Statistics

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PLAYER PAGE

Personal

Gruenenfelder, S (Stiaan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms