Chess South Africa Ratings Database

PLAYER PAGE

Personal

Grunenfelder, S (Stiaan Bosua)

Chess SA id

1080145977

FIDE id

Date of birth

2008-07-08 (U18)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-05-11

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1284.3	1301.9	1200	1200
Raw rating	1284.3	1301.9	1200	1200
Weighted rating	1281.1	1298.5	1200	1200
Weighted performance	756	753.7	0	0
Floor	784.3	801.9	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	147	143.4	165.8	165.8
Highest rating	1284.3 2024-06-01	1301.9 2024-06-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1284.3 2024-06-01	1301.9 2024-06-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1279.2 2025-08-01	1296.4 2025-08-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1200 2018-02-01	1200 2018-02-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1284.3	1301.9	1200	1200
Analysis
Rating	1284.3	1301.9	1200	1200
Raw rating	1284.3	1301.9	1200	1200
Weighted rating	1281.1	1298.5	1200
Weighted performance	756	753.7	0
K-factor	36	36	36	36
Floor	784.3	801.9	700	700
Max/Min rating change allowed	147	143.4	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	1284.3	1301.9	1200	1200
New weighted rating	1281.9	1299.3	1200	1200
New weighted performance	755.5	753.2	0	0
Temp new rating	1284.3	1301.9	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1284.3	1301.9	1200	1200
New K-factor	36	36	36	36
New floor	784.3	801.9	700	700

Item	Main	Standard
	0	0
	0	0
	5	5
	0	0
	5	5
	0	0
History	105	105

Games since
	Main 5	Standard 5		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Tshwane (GTP)
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	105	59.5	56.67	56.7	1107.5	1164.1
Standard	105	59.5	56.67	56.7	1107.5	1164.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1284.3	1301.9	1200	1200
2025-09-01	1284.3	1301.9	1200	1200
2025-08-01	1284.3	1301.9	1200	1200
2025-07-01	1284.3	1301.9	1200	1200
2025-06-01	1284.3	1301.9	1200	1200
2025-05-01	1284.3	1301.9	1200	1200
2025-04-01	1284.3	1301.9	1200	1200
2025-03-01	1284.3	1301.9	1200	1200
2025-02-01	1284.3	1301.9	1200	1200
2025-01-01	1284.3	1301.9	1200	1200
2024-12-01	1284.3	1301.9	1200	1200
2024-11-01	1284.3	1301.9	1200	1200
2024-10-01	1284.3	1301.9	1200	1200
2024-09-01	1284.3	1301.9	1200	1200
2024-08-01	1284.3	1301.9	1200	1200
2024-07-01	1284.3	1301.9	1200	1200
2024-06-01	1284.3	1301.9	1200	1200
2024-08-01	1250.5	1265.2	1200	1200
2024-04-01	1250.5	1265.2	1200	1200
2024-03-01	1250.5	1265.2	1200	1200
2024-02-01	1250.5	1265.2	1200	1200
2024-01-01	1250.5	1265.2	1200	1200
2023-12-01	1250.5	1265.2	1200	1200
2023-11-01	1250.5	1265.2	1200	1200

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	2024 Tshwane South School District CLOSED Individual Championships (U18 Mixed)	2024-05-11	2024-05-11	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
2	2022 Gauteng Schools Team Championships (U15 Open)	2022-08-26	2022-08-26	Standard	Tshwane (GTP)	5	5	5	Yes	Analysis
3	2019 D4 Individual Finals (U11 Mixed)	2019-03-09	2019-03-09	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
4	2019 Constantia Park Open (C)	2019-02-09	2019-02-09	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
5	2019 Tshwane Chess Registration Tournament (C)	2019-01-26	2019-01-26	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
6	2019 Centurion Club Tournament Open	2019-01-23	2019-01-30	Standard	Tshwane (GTP)	6	1	0	Yes	Analysis
7	Boksburg Open 2019 (C)	2019-01-19	2019-01-19	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
8	2018 Tshwane Inter Region (U12B)	2018-12-01	2018-12-01	Standard	Cape Town (WCT)	5	5	5	Yes	Analysis
9	2018 Wild Card Chess Championships (U12 Open)	2018-12-21	2018-12-24	Standard	4 Knights (4K)	7	7	3.5	Yes	Analysis
10	South African Junior Team Championships 2018 (U12B)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	1	Yes	Analysis
11	2018 Lardies Ope (C)	2018-10-27	2018-10-27	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
12	2018 Gauteng North Open (C)	2018-10-20	2018-10-21	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
13	2018 Etienne Lewis Trials (U12 Boys)	2018-08-31	2018-09-02	Standard	Tshwane (GTP)	7	7	4	Yes	Analysis
14	2018 D4 Tshwane South Schools League Finals (U13)	2018-08-03	2018-08-03	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
15	2018 Alekhine Open (C)	2018-08-09	2018-08-11	Standard	Tshwane (GTP)	6	6	3	Yes	Analysis
16	Ekurhuleni Open 2018 (C)	2018-08-18	2018-08-18	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
17	2018 Menlo Open Chess Tournament (C)	2018-07-21	2018-07-21	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
18	2018 Swartkop Open (C)	2018-06-23	2018-06-23	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
19	2018 Gauteng Secondary Schools Individual Chess Championships (U11 Boys)	2018-05-25	2018-05-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
20	2018 Capablanca Swiss (C)	2018-04-27	2018-04-29	Standard	Tshwane (GTP)	7	7	4	Yes	Analysis

#	Games	Start				End
1	10	Tournament 2019 D4 Individual Finals				Tournament 2024 Tshwane South School District CLOSED Individual Championships
		date 2019-03-09	rnd 5	type Standard	result 0.5	date 2024-05-11	rnd 4	type Standard	result 1
		Opponent De Wit, D (Dian)				Opponent Du Toit, SJM (Stephanus (Matteo))
2	9	Tournament 2018 Lardies Ope				Tournament 2018 Tshwane Inter Region
		date 2018-10-27	rnd 2	type Standard	result 1	date 2018-12-01	rnd 5	type Standard	result 1
		Opponent Britz, R (Riaan)				Opponent Webb, K (Kagan)
3	6	Tournament 2019 Constantia Park Open				Tournament 2019 D4 Individual Finals
		date 2019-02-09	rnd 3	type Standard	result 1	date 2019-03-09	rnd 3	type Standard	result 1
		Opponent Gruenenfelder, W (Werni)				Opponent Radley, CC (Carl Christopher)

#	Games	Start				End
1	10	Tournament 2019 D4 Individual Finals				Tournament 2024 Tshwane South School District CLOSED Individual Championships
		date 2019-03-09	rnd 5	type Standard	result 0.5	date 2024-05-11	rnd 4	type Standard	result 1
		Opponent De Wit, D (Dian)				Opponent Du Toit, SJM (Stephanus (Matteo))
2	9	Tournament 2018 Lardies Ope				Tournament 2018 Tshwane Inter Region
		date 2018-10-27	rnd 2	type Standard	result 1	date 2018-12-01	rnd 5	type Standard	result 1
		Opponent Britz, R (Riaan)				Opponent Webb, K (Kagan)
3	6	Tournament 2019 Constantia Park Open				Tournament 2019 D4 Individual Finals
		date 2019-02-09	rnd 3	type Standard	result 1	date 2019-03-09	rnd 3	type Standard	result 1
		Opponent Gruenenfelder, W (Werni)				Opponent Radley, CC (Carl Christopher)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament 2018 Lardies Ope				Tournament 2018 Tshwane Inter Region
		date 2018-10-27	rnd 4	type Standard	result 1	date 2018-12-01	rnd 5	type Standard	result 1
		Opponent Louw, RL (Rudolph)				Opponent Webb, K (Kagan)
2	6	Tournament 2022 Gauteng Schools Team Championships				Tournament 2024 Tshwane South School District CLOSED Individual Championships
		date 2022-08-26	rnd 1	type Standard	result 1	date 2024-05-11	rnd 1	type Standard	result 1
		Opponent Simelane, O (Owethu)				Opponent Thong, F (Fu Shing)
3	3	Tournament 2018 Wild Card Chess Championships				Tournament Boksburg Open 2019
		date 2018-12-24	rnd 7	type Standard	result 1	date 2019-01-19	rnd 2	type Standard	result 1
		Opponent Du Toit, SJM (Stephanus (Matteo))				Opponent Scheepers, D (Divan)

#	Games	Start				End
1	7	Tournament 2018 Lardies Ope				Tournament 2018 Tshwane Inter Region
		date 2018-10-27	rnd 4	type Standard	result 1	date 2018-12-01	rnd 5	type Standard	result 1
		Opponent Louw, RL (Rudolph)				Opponent Webb, K (Kagan)
2	6	Tournament 2022 Gauteng Schools Team Championships				Tournament 2024 Tshwane South School District CLOSED Individual Championships
		date 2022-08-26	rnd 1	type Standard	result 1	date 2024-05-11	rnd 1	type Standard	result 1
		Opponent Simelane, O (Owethu)				Opponent Thong, F (Fu Shing)
3	3	Tournament 2018 Wild Card Chess Championships				Tournament Boksburg Open 2019
		date 2018-12-24	rnd 7	type Standard	result 1	date 2019-01-19	rnd 2	type Standard	result 1
		Opponent Du Toit, SJM (Stephanus (Matteo))				Opponent Scheepers, D (Divan)

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	Du Toit ,SJM (Stephanus (Matteo) Johannes Matheus)	3	3	425	3	3	425	0	0	0	0	0	0
1	Du Toit ,SJM (Stephanus (Matteo) Johannes Matheus)	3	1285	1710	3	1274.7	1710	0	0	0	0	0	0
2	Webb ,K (Kagan)	2	1	0	2	1	0	0	0	0	0	0	0
2	Webb ,K (Kagan)	2	1010.2	1010.2	2	965.9	1010.2	0	0	0	0	0	0
3	Oosthuizen ,JR (John Robert)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
3	Oosthuizen ,JR (John Robert)	2	979.3	1191.8	2	979.6	1191.8	0	0	0	0	0	0
4	Grobler ,JTW (Johannes Theodorus Wessel)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
4	Grobler ,JTW (Johannes Theodorus Wessel)	2	1407.3	1619.8	2	1408.6	1619.8	0	0	0	0	0	0
5	Van Den Berg ,R (Rynhardt)	2	2	425	2	2	425	0	0	0	0	0	0
5	Van Den Berg ,R (Rynhardt)	2	893.2	1318.2	2	888.1	1318.2	0	0	0	0	0	0
6	Van Nieuwenhuizen ,BF (Bernard Francois)	2	2	425	2	2	425	0	0	0	0	0	0
6	Van Nieuwenhuizen ,BF (Bernard Francois)	2	915.8	1340.8	2	907.5	1340.8	0	0	0	0	0	0
7	Neethling ,JC (Jandre Constantene)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
7	Neethling ,JC (Jandre Constantene)	2	868.4	1080.9	2	885.7	1080.9	0	0	0	0	0	0
8	Stadler ,H (Helgard)	2	1	0	2	1	0	0	0	0	0	0	0
8	Stadler ,H (Helgard)	2	1189.2	1189.2	2	1172.6	1189.2	0	0	0	0	0	0
9	Lotter ,CJ (Christiaan Johannes)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
9	Lotter ,CJ (Christiaan Johannes)	2	948.4	1160.9	2	867.1	1160.9	0	0	0	0	0	0
10	Scheepers ,D (Divan)	2	2	425	2	2	425	0	0	0	0	0	0
10	Scheepers ,D (Divan)	2	1055.8	1480.8	2	1051.2	1480.8	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Grunenfelder, S (Stiaan Bosua)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms