Chess South Africa Ratings Database

PLAYER PAGE

Personal

Groenewald, O (Oscar)

Chess SA id

1110305053

FIDE id

Date of birth

2011-02-14 (U16)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-23

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1316.8	1195.5	1383.9	1200
Raw rating	1316.8	1195.5	1383.9	1200
Weighted rating	1276.3	1194.9	1324.3	1200
Weighted performance	1243.9	0	1339.3	0
Floor	816.8	700	883.9	700
K-factor	36	36	36	36
Min/Max rating change allowed	140.4	166.9	127.6	165.8
Highest rating	1327.2 2024-05-01	1200 2024-05-01	1411.9 2024-05-01	1200 2024-05-01
Highest raw rating	1316.8 2025-09-01	1200 2024-05-01	1383.9 2025-09-01	1200 2024-05-01
Highest weighted rating	1287.6 2024-08-01	1200 2024-05-01	1322.9 2024-10-01	1200 2024-05-01
Highest weighted performance	1327.2 2024-05-01	1200 2024-05-01	1411.9 2024-05-01	1200 2024-05-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1316.8	1195.5	1383.9	1200
Analysis
Rating	1316.8	1195.5	1383.9	1200
Raw rating	1316.8	1195.5	1383.9	1200
Weighted rating	1276.3	1194.9	1324.3
Weighted performance	1243.9	0	1339.3
K-factor	36	36	36	36
Floor	816.8	700	883.9	700
Max/Min rating change allowed	140.4	166.9	127.6	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	1316.8	1195.5	1383.9	1200
New weighted rating	1281	1194.8	1331.5	1200
New weighted performance	1243.4	0	1338.8	0
Temp new rating	1316.8	1195.5	1383.9	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1316.8	1195.5	1383.9	1200
New K-factor	36	36	36	36
New floor	816.8	700	883.9	700

Item	Main	Standard	Rapid
	0	0	0
	10	0	10
	21	5	16
	0	0	0
	0	0	0
	0	0	0
History	31	5	26

Games since
	Main 31	Standard 5		Rapid 26		Blitz 0
Gender	Male
Age group	U16
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	582		304		73
Male	501		260		57
U16	94		54		16
U16 Male	73		42		11
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	7.5	75	212.5	1252.5	1465
Standard	0	0	0	0	0	0
Rapid	10	7.5	75	212.5	1252.5	1465
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	31	20	64.52	123.4	1274.5	1397.9
Standard	5	1.5	30	-170	1381	1211
Rapid	26	18.5	71.15	179.8	1254	1433.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1316.8	1195.5	1383.9	1200
2025-09-01	1316.8	1195.5	1383.9	1200
2025-08-01	1307.9	1195.5	1372.6	1200
2025-07-01	1273	1195.5	1322.9	1200
2025-06-01	1273	1195.5	1322.9	1200
2025-05-01	1273	1195.5	1322.9	1200
2025-04-01	1273	1195.5	1322.9	1200
2025-03-01	1273	1195.5	1322.9	1200
2025-02-01	1273	1195.2	1322.9	1200
2025-01-01	1273	1188.8	1322.9	1200
2024-12-01	1273	1188.8	1322.9	1200
2024-11-01	1273	1188.8	1322.9	1200
2024-10-01	1273	1188.8	1322.9	1200
2024-09-01	1273	1188.8	1322.9	1200
2024-08-01	1287.6	1200	1322.9	1200
2024-07-01	1287.6	1200	1322.9	1200
2024-06-01	1262.9	1200	1309.6	1200
2024-08-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	1200
2023-11-01	1200	1200	1200	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	Pedro Booyse Top Schools 2025 (U15)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	6	6	3.5	Yes	Analysis
2	Upper West Coast Top Schools 2025 (U15)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	4	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Pedro Booyse Top Schools 2025 (U15)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	6	6	3.5	Yes	Analysis
2	Upper West Coast Top Schools 2025 (U15)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	4	4	Yes	Analysis
3	Pedro Booyse Top Schools Championships 2024 (U13)	2024-07-20	2024-07-20	Standard	West Coast (WCU)	5	5	1.5	Yes	Analysis
4	Western Cape - Brian Raubenheimer Development Tournament 2024 (U13 Boys)	2024-06-08	2024-06-08	Rapid	Overberg (WOS)	6	6	4	Yes	Analysis
5	Brenton Cupido West Coast Schools Championship 2024 (U13)	2024-05-24	2024-05-24	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
6	Bo-Weskus Skole Skaak Top Skole 2024 (O13)	2024-05-11	2024-05-11	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis

#	Games	Start				End
1	5	Tournament Upper West Coast Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-06-14	rnd 1	type Rapid	result 1	date 2025-08-23	rnd 1	type Rapid	result 1
		Opponent Van Wyk, D (Deslovienne)				Opponent Brand, E (Evan)
2	5	Tournament Bo-Weskus Skole Skaak Top Skole 2024				Tournament Brenton Cupido West Coast Schools Championship 2024
		date 2024-05-11	rnd 3	type Rapid	result 1	date 2024-05-24	rnd 2	type Rapid	result 1
		Opponent Digovich, E (Ethan)				Opponent Van Schalkwyk, J (Jayme-Lee)
3	3	Tournament Western Cape - Brian Raubenheimer Development Tournament 2024				Tournament Western Cape - Brian Raubenheimer Development Tournament 2024
		date 2024-06-08	rnd 4	type Rapid	result 1	date 2024-06-08	rnd 6	type Rapid	result 1
		Opponent Goliath, J (Jaywin)				Opponent Maarman, B (Blayden)

#	Games	Start				End
1	1	Tournament Pedro Booyse Top Schools Championships 2024				Tournament Pedro Booyse Top Schools Championships 2024
		date 2024-07-20	rnd 4	type Standard	result 0.5	date 2024-07-20	rnd 4	type Standard	result 0.5
		Opponent Schoeman, M (Mischke)				Opponent Schoeman, M (Mischke)
2	1	Tournament Pedro Booyse Top Schools Championships 2024				Tournament Pedro Booyse Top Schools Championships 2024
		date 2024-07-20	rnd 2	type Standard	result 1	date 2024-07-20	rnd 2	type Standard	result 1
		Opponent Joseph, N (Nashadine)				Opponent Joseph, N (Nashadine)

#	Games	Start				End
1	8	Tournament Western Cape - Brian Raubenheimer Development Tournament 2024				Tournament Pedro Booyse Top Schools 2025
		date 2024-06-08	rnd 4	type Rapid	result 1	date 2025-08-23	rnd 1	type Rapid	result 1
		Opponent Goliath, J (Jaywin)				Opponent Brand, E (Evan)
2	5	Tournament Bo-Weskus Skole Skaak Top Skole 2024				Tournament Brenton Cupido West Coast Schools Championship 2024
		date 2024-05-11	rnd 3	type Rapid	result 1	date 2024-05-24	rnd 2	type Rapid	result 1
		Opponent Digovich, E (Ethan)				Opponent Van Schalkwyk, J (Jayme-Lee)
3	2	Tournament Pedro Booyse Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-08-23	rnd 5	type Rapid	result 1	date 2025-08-23	rnd 6	type Rapid	result 0.5
		Opponent Van Staden, L (Laurenzia)				Opponent Warner, A (Alicia)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Upper West Coast Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-06-14	rnd 1	type Rapid	result 1	date 2025-08-23	rnd 1	type Rapid	result 1
		Opponent Van Wyk, D (Deslovienne)				Opponent Brand, E (Evan)
2	5	Tournament Bo-Weskus Skole Skaak Top Skole 2024				Tournament Brenton Cupido West Coast Schools Championship 2024
		date 2024-05-11	rnd 3	type Rapid	result 1	date 2024-05-24	rnd 2	type Rapid	result 1
		Opponent Digovich, E (Ethan)				Opponent Van Schalkwyk, J (Jayme-Lee)
3	3	Tournament Western Cape - Brian Raubenheimer Development Tournament 2024				Tournament Western Cape - Brian Raubenheimer Development Tournament 2024
		date 2024-06-08	rnd 4	type Rapid	result 1	date 2024-06-08	rnd 6	type Rapid	result 1
		Opponent Goliath, J (Jaywin)				Opponent Maarman, B (Blayden)

#	Games	Start				End
1	1	Tournament Pedro Booyse Top Schools Championships 2024				Tournament Pedro Booyse Top Schools Championships 2024
		date 2024-07-20	rnd 2	type Standard	result 1	date 2024-07-20	rnd 2	type Standard	result 1
		Opponent Joseph, N (Nashadine)				Opponent Joseph, N (Nashadine)

#	Games	Start				End
1	8	Tournament Western Cape - Brian Raubenheimer Development Tournament 2024				Tournament Pedro Booyse Top Schools 2025
		date 2024-06-08	rnd 4	type Rapid	result 1	date 2025-08-23	rnd 1	type Rapid	result 1
		Opponent Goliath, J (Jaywin)				Opponent Brand, E (Evan)
2	5	Tournament Bo-Weskus Skole Skaak Top Skole 2024				Tournament Brenton Cupido West Coast Schools Championship 2024
		date 2024-05-11	rnd 3	type Rapid	result 1	date 2024-05-24	rnd 2	type Rapid	result 1
		Opponent Digovich, E (Ethan)				Opponent Van Schalkwyk, J (Jayme-Lee)
3	2	Tournament Brenton Cupido West Coast Schools Championship 2024				Tournament Western Cape - Brian Raubenheimer Development Tournament 2024
		date 2024-05-24	rnd 5	type Rapid	result 1	date 2024-06-08	rnd 1	type Rapid	result 1
		Opponent Tieties, F (Faith)				Opponent Van Der Merwe, L (Luan Rudolf Johanne)

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	Van Staden ,L (Laurenzia)	3	2	141.7	0	0	0	3	2	141.7	0	0	0
1	Van Staden ,L (Laurenzia)	3	1277.7	1419.4	0	0	0	3	1299.1	1419.4	0	0	0
2	Tieties ,B (Beauton)	2	0	-425	1	0	-425	1	0	-425	0	0	0
2	Tieties ,B (Beauton)	2	1578.2	1153.2	1	1530	1153.2	1	1570.4	1153.2	0	0	0
3	Joseph ,N (Nashadine)	2	2	425	1	1	425	1	1	425	0	0	0
3	Joseph ,N (Nashadine)	2	1188.2	1613.2	1	1146.8	1613.2	1	1192.1	1613.2	0	0	0
4	Warner ,A (Alicia)	2	1.5	212.5	0	0	0	2	1.5	212.5	0	0	0
4	Warner ,A (Alicia)	2	1342.1	1554.6	0	0	0	2	1407	1554.6	0	0	0
5	Brand ,E (Evan)	2	1	0	0	0	0	2	1	0	0	0	0
5	Brand ,E (Evan)	2	1262.8	1262.8	0	0	0	2	1325.4	1262.8	0	0	0
6	Schoeman ,M (Mischke)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
6	Schoeman ,M (Mischke)	1	1391.2	1391.2	1	1310.5	1391.2	0	0	0	0	0	0
7	Sikulu ,L (Lunje)	1	1	425	0	0	0	1	1	425	0	0	0
7	Sikulu ,L (Lunje)	1	1187.2	1612.2	0	0	0	1	1179.2	1612.2	0	0	0
8	Coetzee ,H (Hennie)	1	0	-425	0	0	0	1	0	-425	0	0	0
8	Coetzee ,H (Hennie)	1	1321	896	0	0	0	1	1200	896	0	0	0
9	Van Wyk ,D (Deslovienne)	1	1	425	0	0	0	1	1	425	0	0	0
9	Van Wyk ,D (Deslovienne)	1	1094.7	1519.7	0	0	0	1	1094.9	1519.7	0	0	0
10	Isaaks ,M (Matthew)	1	1	425	0	0	0	1	1	425	0	0	0
10	Isaaks ,M (Matthew)	1	1199.7	1624.7	0	0	0	1	1200	1624.7	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Groenewald, O (Oscar)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms