Chess South Africa Ratings Database

PLAYER PAGE

Personal

Serra Coelho, E (Ethan)

Chess SA id

105089344

FIDE id

Date of birth

2005-06-19 (Adult)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2022-06-18

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1199.7	1211.2	726.4	726.4
Raw rating	1199.7	1211.2	726.4	726.4
Weighted rating	1199.7	1211.2	726.4	726.4
Weighted performance	547.9	549.3	0	0
Floor	699.7	711.2	500	500
K-factor	40	36	40	40
Min/Max rating change allowed	165.9	163.2	325.6	325.6
Highest rating	1200 2024-11-01	1211.2 2024-02-01	1200 2024-02-01	1200 2024-02-01
Highest raw rating	1199.7 2024-02-01	1211.2 2024-02-01	726.4 2024-02-01	726.4 2024-02-01
Highest weighted rating	1199.7 2024-11-01	1211.2 2024-06-01	726.4 2024-11-01	726.4 2024-11-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1199.7	1211.2	726.4	726.4
Analysis
Rating	1199.7	1211.2	726.4	726.4
Raw rating	1199.7	1211.2	726.4	726.4
Weighted rating	1199.7	1211.2	726.4
Weighted performance	547.9	549.3	0
K-factor	40	36	40	40
Floor	699.7	711.2	500	500
Max/Min rating change allowed	165.9	163.2	325.6	325.6
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	1199.7	1211.2	726.4	726.4
New weighted rating	1199.7	1211.2	726.4	726.4
New weighted performance	547.5	548.8	0	0
Temp new rating	1199.7	1211.2	726.4	726.4
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1199.7	1211.2	726.4	726.4
New K-factor	40	36	40	40
New floor	699.7	711.2	500	500

Item	Main	Standard
	0	0
	0	0
	0	0
	0	0
	10	10
	0	0
History	117	117

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult 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	78	40	51.28	10.9	1036.6	1047.5
Standard	78	40	51.28	10.9	1036.6	1047.5
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1199.7	1211.2	726.4	726.4
2025-09-01	1199.7	1211.2	726.4	726.4
2025-08-01	1199.7	1211.2	726.4	726.4
2025-07-01	1199.7	1211.2	726.4	726.4
2025-06-01	1199.7	1211.2	726.4	726.4
2025-05-01	1199.7	1211.2	726.4	726.4
2025-04-01	1199.7	1211.2	726.4	726.4
2025-03-01	1199.7	1211.2	726.4	726.4
2025-02-01	1199.7	1211.2	726.4	726.4
2025-01-01	1199.7	1211.2	726.4	726.4
2024-12-01	1199.7	1211.2	726.4	726.4
2024-11-01	1199.7	1211.2	726.4	726.4
2024-10-01	1199.7	1211.2	726.4	726.4
2024-09-01	1199.7	1211.2	726.4	726.4
2024-08-01	1199.7	1211.2	726.4	726.4
2024-07-01	1199.7	1211.2	726.4	726.4
2024-06-01	1199.7	1211.2	726.4	726.4
2024-08-01	1199.7	1211.2	726.4	726.4
2024-04-01	1199.7	1211.2	726.4	726.4
2024-03-01	1199.7	1211.2	726.4	726.4
2024-02-01	1199.7	1211.2	726.4	726.4
2024-01-01	1199.7	1211.2	726.4	726.4
2023-12-01	1199.7	1211.2	726.4	726.4
2023-11-01	1199.7	1211.2	726.4	726.4

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	2022 Gauteng Schools Individual Chess Championship (U18 Boys)	2022-06-18	2022-06-18	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
2	Ekurhuleni Trials 2 2022 (U20)	2022-05-28	2022-05-28	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
3	2019 Gauteng School League Finals (U15 Open)	2019-08-24	2019-08-24	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
4	2018 Wild Card Chess Championships (U14 Open)	2018-12-21	2018-12-24	Standard	4 Knights (4K)	7	6	3	Yes	Analysis
5	South African Junior Team Championships 2018 (U14E)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	6	5	Yes	Analysis
6	2018 Interregion Sedibeng vs Ekurhuleni (J)	2018-11-03	2018-11-03	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
7	Boksburg Chess Club Open 2018 (U14)	2018-07-14	2018-07-14	Standard	Ekurhuleni (GE)	5	1	0	Yes	Analysis
8	Primrose Chess Club Open 2018 (C)	2018-06-02	2018-06-02	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
9	Ekurhuleni Trials 3 2018 (U14)	2018-06-16	2018-06-16	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
10	2018 Gauteng Secondary Schools Individual Chess Championships (U13 Boys)	2018-05-25	2018-05-25	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
11	Ekurhuleni North Schools Individuals 2018 (U13 Boys)	2018-05-12	2018-05-12	Standard	Ekurhuleni (GE)	5	4	3	Yes	Analysis
12	Ekurhuleni Trials 2 2018 (U14)	2018-04-21	2018-04-21	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
13	Ekurhuleni Trials 1 2018 (U14)	2018-03-10	2018-03-10	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
14	Elspark Open 2018 (C)	2018-02-10	2018-02-10	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
15	Brakpan Open 2018 (C)	2018-02-24	2018-02-24	Standard	Ekurhuleni (GE)	5	4	2	Yes	Analysis
16	South African Junior Wildcard Championships 2017 (U14 Open)	2018-01-09	2018-01-12	Standard	4 Knights (4K)	7	7	2	Yes	Analysis

#	Games	Start				End
1	7	Tournament Ekurhuleni Trials 1 2018				Tournament Ekurhuleni Trials 2 2018
		date 2018-03-10	rnd 2	type Standard	result 1	date 2018-04-21	rnd 3	type Standard	result 1
		Opponent Ahrens, H (Heinrich)				Opponent Venter, M (Magnus)
2	3	Tournament South African Junior Team Championships 2018				Tournament South African Junior Team Championships 2018
		date 2018-12-18	rnd 5	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Du Preez, E (Estiaan)				Opponent Lloyd, M (Markus)
3	3	Tournament 2018 Interregion Sedibeng vs Ekurhuleni				Tournament South African Junior Team Championships 2018
		date 2018-11-03	rnd 5	type Standard	result 1	date 2018-12-17	rnd 3	type Standard	result 1
		Opponent Loubser, SA (Stephanus)				Opponent Mokwena, K (Kole)

#	Games	Start				End
1	7	Tournament Ekurhuleni Trials 1 2018				Tournament Ekurhuleni Trials 2 2018
		date 2018-03-10	rnd 2	type Standard	result 1	date 2018-04-21	rnd 3	type Standard	result 1
		Opponent Ahrens, H (Heinrich)				Opponent Venter, M (Magnus)
2	3	Tournament South African Junior Team Championships 2018				Tournament South African Junior Team Championships 2018
		date 2018-12-18	rnd 5	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Du Preez, E (Estiaan)				Opponent Lloyd, M (Markus)
3	3	Tournament 2018 Interregion Sedibeng vs Ekurhuleni				Tournament South African Junior Team Championships 2018
		date 2018-11-03	rnd 5	type Standard	result 1	date 2018-12-17	rnd 3	type Standard	result 1
		Opponent Loubser, SA (Stephanus)				Opponent Mokwena, K (Kole)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament South African Junior Team Championships 2018				Tournament South African Junior Team Championships 2018
		date 2018-12-18	rnd 5	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Du Preez, E (Estiaan)				Opponent Lloyd, M (Markus)
2	3	Tournament 2018 Interregion Sedibeng vs Ekurhuleni				Tournament South African Junior Team Championships 2018
		date 2018-11-03	rnd 5	type Standard	result 1	date 2018-12-17	rnd 3	type Standard	result 1
		Opponent Loubser, SA (Stephanus)				Opponent Mokwena, K (Kole)
3	3	Tournament Ekurhuleni North Schools Individuals 2018				Tournament Ekurhuleni North Schools Individuals 2018
		date 2018-05-12	rnd 1	type Standard	result 1	date 2018-05-12	rnd 4	type Standard	result 1
		Opponent Maidi, S (Siyabonga)				Opponent Sebola, T (Thapelo)

#	Games	Start				End
1	3	Tournament South African Junior Team Championships 2018				Tournament South African Junior Team Championships 2018
		date 2018-12-18	rnd 5	type Standard	result 1	date 2018-12-20	rnd 7	type Standard	result 1
		Opponent Du Preez, E (Estiaan)				Opponent Lloyd, M (Markus)
2	3	Tournament 2018 Interregion Sedibeng vs Ekurhuleni				Tournament South African Junior Team Championships 2018
		date 2018-11-03	rnd 5	type Standard	result 1	date 2018-12-17	rnd 3	type Standard	result 1
		Opponent Loubser, SA (Stephanus)				Opponent Mokwena, K (Kole)
3	3	Tournament Ekurhuleni North Schools Individuals 2018				Tournament Ekurhuleni North Schools Individuals 2018
		date 2018-05-12	rnd 1	type Standard	result 1	date 2018-05-12	rnd 4	type Standard	result 1
		Opponent Maidi, S (Siyabonga)				Opponent Sebola, T (Thapelo)

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	De Swardt ,E (Eduan)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
1	De Swardt ,E (Eduan)	2	1175.5	963	2	1173.5	963	0	0	0	0	0	0
2	Fourie ,B (Brandon)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Fourie ,B (Brandon)	2	1580.1	1155.1	2	1599.6	1155.1	0	0	0	0	0	0
3	Macdonald ,B (Brandon)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Macdonald ,B (Brandon)	2	1039.6	614.6	2	1049	614.6	0	0	0	0	0	0
4	Masemeni ,K (Keabetswe)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
4	Masemeni ,K (Keabetswe)	2	925.6	713.1	2	928.4	713.1	0	0	0	0	0	0
5	Nghondzweni ,B (Bohlale)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Nghondzweni ,B (Bohlale)	1	1163.3	738.3	1	1155.6	738.3	0	0	0	0	0	0
6	Van Niekerk ,LA (Lee Ann)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Van Niekerk ,LA (Lee Ann)	1	616.5	191.5	1	615.6	191.5	0	0	0	0	0	0
7	Njoku ,G (Greatman)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Njoku ,G (Greatman)	1	1070	645	1	1072.7	645	0	0	0	0	0	0
8	Ramaribane ,T (Tumelo)	1	1	425	1	1	425	0	0	0	0	0	0
8	Ramaribane ,T (Tumelo)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Mekgoe ,K (Kamogelo)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Mekgoe ,K (Kamogelo)	1	907.1	482.1	1	965	482.1	0	0	0	0	0	0
10	Van Der Walt ,I (Ivan)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Van Der Walt ,I (Ivan)	1	793.4	368.4	1	793.4	368.4	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

Serra Coelho, E (Ethan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms