Chess South Africa Ratings Database

PLAYER PAGE

Personal

Roos, M (Marnitz)

Chess SA id

1140301244

FIDE id

Date of birth

2014-07-09 (U12)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-02

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1221.8	1231.1	1208.2	1200
Raw rating	1221.8	1231.1	1176.8	1200
Weighted rating	1220.8	1216.4	1208.2	1200
Weighted performance	0	0	0	0
Floor	737.2	731.1	718.4	700
K-factor	36	36	36	36
Min/Max rating change allowed	160.8	158.6	171.4	165.8
Highest rating	1237.2 2025-05-05	1231.1 2025-05-05	1289.2 2024-03-01	1200 2024-04-01
Highest raw rating	1237.2 2025-05-05	1231.1 2025-05-05	1218.4 2024-04-01	1200 2024-04-01
Highest weighted rating	1219.6 2025-09-01	1210.8 2025-08-01	1218.4 2024-10-01	1200 2024-04-01
Highest weighted performance	1231.7 2024-03-01	1223.3 2024-09-01	1289.2 2024-03-01	1200 2024-04-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	-2.7	0
New rating	1221.8	1231.1	1205.5	1200
Analysis
Rating	1221.8	1231.1	1208.2	1200
Raw rating	1221.8	1231.1	1176.8	1200
Weighted rating	1220.8	1216.4	1208.2
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	737.2	731.1	718.4	700
Max/Min rating change allowed	160.8	158.6	171.4	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	1221.8	1231.1	1176.8	1200
New weighted rating	1221.3	1218.1	1205.5	1200
New weighted performance	0	0	0	0
Temp new rating	1221.8	1231.1	1205.5	1200
Temp new rating +/-	0	0	-2.7	0
Final new rating +/-	0	0	-2.7	0
New rating	1221.8	1231.1	1205.5	1200
New K-factor	36	36	36	36
New floor	737.2	731.1	718.4	700

Item	Main	Standard	Rapid
	0	0	0
	12	5	7
	9	4	5
	0	0	0
	0	0	0
	0	0	0
History	21	9	12

Games since
	Main 21	Standard 9		Rapid 12		Blitz 0
Gender	Male
Age group	U12
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 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	12	5.5	45.83	-35.4	1269.7	1234.3
Standard	5	3	60	85	1257.9	1342.9
Rapid	7	2.5	35.71	-121.4	1278.1	1156.7
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	21	10.5	50	0	1249.4	1249.4
Standard	9	5	55.56	47.2	1250.2	1297.4
Rapid	12	5.5	45.83	-35.4	1248.9	1213.5
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1221.8	1231.1	1176.8	1200
2025-09-30	1221.8	1231.1	1176.8	1200
2025-09-01	1221.8	1231.1	1176.8	1200
2025-08-01	1237.2	1231.1	1218.4	1200
2025-07-01	1237.2	1231.1	1218.4	1200
2025-06-01	1237.2	1231.1	1218.4	1200
2025-05-01	1237.2	1231.1	1218.4	1200
2025-04-01	1213.2	1203.6	1218.4	1200
2025-03-01	1213.2	1203.6	1218.4	1200
2025-02-01	1213.2	1203.6	1218.4	1200
2025-01-01	1213.2	1203.6	1218.4	1200
2024-12-01	1213.2	1203.6	1218.4	1200
2024-11-01	1213.2	1203.6	1218.4	1200
2024-10-01	1213.2	1203.6	1218.4	1200
2024-09-01	1212	1200	1218.4	1200
2024-08-01	1212	1200	1218.4	1200
2024-07-01	1212	1200	1218.4	1200
2024-09-01	1212	1200	1218.4	1200
2024-05-01	1212	1200	1218.4	1200
2024-04-01	1212	1200	1218.4	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

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	Benoni Primary School Cluster Teams 2025 (U11A)	2025-08-02	2025-08-02	Rapid	Ekurhuleni (GE)	7	7	2.5	Yes	Analysis
2	Benoni Primary School Cluster 12 April 2025 (U11 Open)	2025-04-12	2025-04-12	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Benoni Primary School Cluster Teams 2025 (U11A)	2025-08-02	2025-08-02	Rapid	Ekurhuleni (GE)	7	7	2.5	Yes	Analysis
2	Benoni Primary School Cluster 12 April 2025 (U11 Open)	2025-04-12	2025-04-12	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
3	Ekurhuleni North Schools Finals - Teams 2024 (U11 Open)	2024-08-03	2024-08-03	Standard	Ekurhuleni (GE)	5	4	2	Yes	Analysis
4	Benoni Primary School Cluster Individuals 2024 (U11 Boys)	2024-03-09	2024-03-09	Rapid	Ekurhuleni (GE)	5	5	3	Yes	Analysis

#	Games	Start				End
1	3	Tournament Benoni Primary School Cluster 12 April 2025				Tournament Benoni Primary School Cluster 12 April 2025
		date 2025-04-12	rnd 1	type Standard	result 1	date 2025-04-12	rnd 3	type Standard	result 1
		Opponent Meiring, J (Jaundre)				Opponent Van Rensburg, J (Janru)
2	2	Tournament Benoni Primary School Cluster Teams 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-02	rnd 2	type Rapid	result 0.5
		Opponent Maharaj, N (Nirav)				Opponent Lin, J (Jasmine)
3	2	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-03-09	rnd 5	type Rapid	result 1	date 2024-08-03	rnd 1	type Standard	result 1
		Opponent Van Der Walt, J (Juandre)				Opponent Molife, N (Ntsako)

#	Games	Start				End
1	3	Tournament Benoni Primary School Cluster 12 April 2025				Tournament Benoni Primary School Cluster 12 April 2025
		date 2025-04-12	rnd 1	type Standard	result 1	date 2025-04-12	rnd 3	type Standard	result 1
		Opponent Meiring, J (Jaundre)				Opponent Van Rensburg, J (Janru)
2	1	Tournament Ekurhuleni North Schools Finals - Teams 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-08-03	rnd 3	type Standard	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Ssekakozi, M (Morgan)				Opponent Ssekakozi, M (Morgan)
3	1	Tournament Ekurhuleni North Schools Finals - Teams 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-08-03	rnd 1	type Standard	result 1	date 2024-08-03	rnd 1	type Standard	result 1
		Opponent Molife, N (Ntsako)				Opponent Molife, N (Ntsako)

#	Games	Start				End
1	3	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Benoni Primary School Cluster Teams 2025
		date 2024-03-09	rnd 5	type Rapid	result 1	date 2025-08-02	rnd 2	type Rapid	result 0.5
		Opponent Van Der Walt, J (Juandre)				Opponent Lin, J (Jasmine)
2	1	Tournament Benoni Primary School Cluster Teams 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-08-02	rnd 4	type Rapid	result 1	date 2025-08-02	rnd 4	type Rapid	result 1
		Opponent Moutafis, A (Andoni)				Opponent Moutafis, A (Andoni)
3	1	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Benoni Primary School Cluster Individuals 2024
		date 2024-03-09	rnd 3	type Rapid	result 1	date 2024-03-09	rnd 3	type Rapid	result 1
		Opponent Ornelas, J (Jayden)				Opponent Ornelas, J (Jayden)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Benoni Primary School Cluster 12 April 2025				Tournament Benoni Primary School Cluster 12 April 2025
		date 2025-04-12	rnd 1	type Standard	result 1	date 2025-04-12	rnd 3	type Standard	result 1
		Opponent Meiring, J (Jaundre)				Opponent Van Rensburg, J (Janru)
2	2	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-03-09	rnd 5	type Rapid	result 1	date 2024-08-03	rnd 1	type Standard	result 1
		Opponent Van Der Walt, J (Juandre)				Opponent Molife, N (Ntsako)
3	1	Tournament Benoni Primary School Cluster Teams 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-08-02	rnd 4	type Rapid	result 1	date 2025-08-02	rnd 4	type Rapid	result 1
		Opponent Moutafis, A (Andoni)				Opponent Moutafis, A (Andoni)

#	Games	Start				End
1	3	Tournament Benoni Primary School Cluster 12 April 2025				Tournament Benoni Primary School Cluster 12 April 2025
		date 2025-04-12	rnd 1	type Standard	result 1	date 2025-04-12	rnd 3	type Standard	result 1
		Opponent Meiring, J (Jaundre)				Opponent Van Rensburg, J (Janru)
2	1	Tournament Ekurhuleni North Schools Finals - Teams 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-08-03	rnd 3	type Standard	result 1	date 2024-08-03	rnd 3	type Standard	result 1
		Opponent Ssekakozi, M (Morgan)				Opponent Ssekakozi, M (Morgan)
3	1	Tournament Ekurhuleni North Schools Finals - Teams 2024				Tournament Ekurhuleni North Schools Finals - Teams 2024
		date 2024-08-03	rnd 1	type Standard	result 1	date 2024-08-03	rnd 1	type Standard	result 1
		Opponent Molife, N (Ntsako)				Opponent Molife, N (Ntsako)

#	Games	Start				End
1	2	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Benoni Primary School Cluster Teams 2025
		date 2024-03-09	rnd 5	type Rapid	result 1	date 2025-08-02	rnd 1	type Rapid	result 1
		Opponent Van Der Walt, J (Juandre)				Opponent Maharaj, N (Nirav)
2	1	Tournament Benoni Primary School Cluster Teams 2025				Tournament Benoni Primary School Cluster Teams 2025
		date 2025-08-02	rnd 4	type Rapid	result 1	date 2025-08-02	rnd 4	type Rapid	result 1
		Opponent Moutafis, A (Andoni)				Opponent Moutafis, A (Andoni)
3	1	Tournament Benoni Primary School Cluster Individuals 2024				Tournament Benoni Primary School Cluster Individuals 2024
		date 2024-03-09	rnd 3	type Rapid	result 1	date 2024-03-09	rnd 3	type Rapid	result 1
		Opponent Ornelas, J (Jayden)				Opponent Ornelas, J (Jayden)

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 Rensburg ,J (Janru)	1	1	425	1	1	425	0	0	0	0	0	0
1	Van Rensburg ,J (Janru)	1	1318.8	1743.8	1	1275	1743.8	0	0	0	0	0	0
2	Van Staden ,J (Jayden)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Van Staden ,J (Jayden)	1	1211.8	786.8	1	1214.4	786.8	0	0	0	0	0	0
3	Els ,L (Luan)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Els ,L (Luan)	1	1364.7	939.7	1	1334.5	939.7	0	0	0	0	0	0
4	Molife ,N (Ntsako)	1	1	425	1	1	425	0	0	0	0	0	0
4	Molife ,N (Ntsako)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	Ssekakozi ,M (Morgan)	1	1	425	1	1	425	0	0	0	0	0	0
5	Ssekakozi ,M (Morgan)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	Meiring ,J (Jaundre)	1	1	425	1	1	425	0	0	0	0	0	0
6	Meiring ,J (Jaundre)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
7	Stroebel ,L (Lian)	1	1	425	1	1	425	0	0	0	0	0	0
7	Stroebel ,L (Lian)	1	1205.8	1630.8	1	1200	1630.8	0	0	0	0	0	0
8	Rossouw ,L (Lience)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Rossouw ,L (Lience)	1	1350.3	925.3	1	1327.9	925.3	0	0	0	0	0	0
9	Vuma ,N (Nathan)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Vuma ,N (Nathan)	1	1200	775	1	1200	775	0	0	0	0	0	0
10	Ornelas ,J (Jayden)	1	1	425	0	0	0	1	1	425	0	0	0
10	Ornelas ,J (Jayden)	1	1200.2	1625.2	0	0	0	1	1198.4	1625.2	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Roos, M (Marnitz)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms