Chess South Africa Ratings Database

PLAYER PAGE

Personal

Oberholzer, E (Ethan)

Chess SA id

102094361

FIDE id

Date of birth

2002-12-05 (Adult)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

CPA

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	1290.7	1299.2	1179	1200
Raw rating	1290.7	1299.2	1179	1200
Weighted rating	1272.8	1278.9	1176.9	1200
Weighted performance	1134.9	1085.1	960.8	0
Floor	819	815.5	706.5	700
K-factor	36	36	36	36
Min/Max rating change allowed	145.7	144	170.9	165.8
Highest rating	1319 2021-11-01	1315.5 2021-11-01	1231 2024-08-01	1200 2018-10-01
Highest raw rating	1319 2021-11-01	1315.5 2021-11-01	1206.5 2024-09-01	1200 2024-02-01
Highest weighted rating	1319 2021-11-01	1315.5 2021-11-01	1206.5 2018-10-01	1200 2018-10-01
Highest weighted performance	1297.1 2019-09-01	1292.4 2019-09-01	1231 2024-08-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1290.7	1299.2	1179	1200
Analysis
Rating	1290.7	1299.2	1179	1200
Raw rating	1290.7	1299.2	1179	1200
Weighted rating	1272.8	1278.9	1176.9
Weighted performance	1134.9	1085.1	960.8
K-factor	36	36	36	36
Floor	819	815.5	706.5	700
Max/Min rating change allowed	145.7	144	170.9	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	1290.7	1299.2	1179	1200
New weighted rating	1274.3	1280.8	1176.9	1200
New weighted performance	1127.6	1077.3	954.4	0
Temp new rating	1290.7	1299.2	1179	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1290.7	1299.2	1179	1200
New K-factor	36	36	36	36
New floor	819	815.5	706.5	700

Item	Main	Standard	Rapid
	0	0	0
	10	5	5
	24	5	19
	15	15	0
	25	25	0
	16	16	0
History	168	144	24

Games since
	Main 34	Standard 10		Rapid 24		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	1772		297		93
Male	1331		223		56
Adult	242		79		7
Adult Male	226		73		6
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	10	4.5	45	-42.5	1383.8	1341.2
Standard	5	2.5	50	0	1401.4	1401.4
Rapid	5	2	40	-85	1366.1	1281.1
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	163	72.5	44.48	-46.9	1291.9	1245
Standard	139	62	44.6	-45.9	1291.2	1245.3
Rapid	24	10.5	43.75	-53.1	1296.2	1243.1
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1290.7	1299.2	1179	1200
2025-09-30	1290.7	1299.2	1179	1200
2025-09-01	1290.7	1299.2	1179	1200
2025-08-01	1268.8	1273.2	1179	1200
2025-07-01	1268.8	1273.2	1179	1200
2025-06-01	1268.8	1273.2	1179	1200
2025-05-01	1268.8	1273.1	1179	1200
2025-04-01	1268.8	1272.9	1178.8	1200
2025-03-01	1268.2	1272.6	1180.1	1200
2025-02-01	1267.2	1272.6	1178.4	1200
2025-01-01	1255.2	1272.6	1146.7	1200
2024-12-01	1255.2	1272.6	1146.7	1200
2024-11-01	1255.2	1272.6	1146.7	1200
2024-10-01	1291.5	1272.6	1206.5	1200
2024-09-01	1291.5	1272.6	1206.5	1200
2024-08-01	1259.3	1272.6	1156.1	1200
2024-07-01	1260.4	1272.6	1181.3	1200
2024-09-01	1260.4	1272.6	1181.3	1200
2024-05-01	1260.4	1272.6	1181.3	1200
2024-04-01	1260.4	1272.6	1181.3	1200
2024-03-01	1274.7	1272.6	1200	1200
2024-02-01	1274.7	1272.6	1200	1200
2024-01-01	1281	1278	1200	1200
2023-12-01	1281	1278	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	UJ @20 Years Chess Championship 2025 (Open)	2025-08-02	2025-08-02	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
2	Wits 1st Trials 2025 (Open)	2025-03-27	2025-03-27	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	UJ @20 Years Chess Championship 2025 (Open)	2025-08-02	2025-08-02	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
2	Wits 1st Trials 2025 (Open)	2025-03-27	2025-03-27	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	WITS 6th Trials 2024	2024-09-21	2024-09-21	Rapid	Johannesburg Metro (GJM)	5	4	0.5	Yes	Analysis
4	Wits 5th Trials 2024	2024-08-17	2024-08-17	Rapid	Johannesburg Metro (GJM)	5	5	3.5	Yes	Analysis
5	Wits 4th Trials 2024	2024-07-27	2024-07-27	Rapid	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
6	Wits 1st Trials 2024	2024-03-16	2024-03-16	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
7	JMC Kick Off Tournament 2024 (B)	2024-01-28	2024-01-28	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
8	JMC Trinity Little Falls 2023 (B)	2023-07-02	2023-07-02	Standard	Johannesburg Metro (GJM)	5	5	2.5	Yes	Analysis
9	Alberton Chess Club Tournament 1 2023 (B)	2023-04-15	2023-04-15	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
10	Laerkool Midvaal Chess Open 2023 (A)	2023-01-28	2023-01-28	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
11	Ekurhuleni Chess Springs Club Open 2022 (B)	2022-09-03	2022-09-03	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
12	South African Open 2022 (B)	2022-07-09	2022-07-17	Standard	Cape Town (WCT)	11	10	4	Yes	Analysis
13	2022 Gauteng Interregion (U20 Open)	2022-02-26	2022-02-26	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
14	Ekurhuleni Chess Open 2022 (B)	2022-01-08	2022-01-09	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
15	Ekurhuleni Trials (3)	2021-11-06	2021-11-06	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
16	Pinnacle College Waterfall Open (Pinnacle)	2021-10-02	2021-10-03	Standard	Johannesburg Metro (GJM)	6	6	3.5	Yes	Analysis
17	Ekurhuleni Chess Chessa Open 2021 (B)	2021-03-27	2021-03-27	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
18	2019 Wild Card Chess Championship (U18 Open)	2020-01-09	2020-01-12	Standard	4 Knights (4K)	7	7	2	Yes	Analysis
19	2019 South African Junior Team Championships (U18C)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	6	4	Yes	Analysis
20	GE vs GSV Inter Regional 2019 (U18A)	2019-10-26	2019-10-26	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
21	Ekurhuleni Grand Prix 2019 (B)	2019-09-14	2019-09-14	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
22	2019 Boksburg Chess Club Round Robin (H)	2019-09-28	2019-09-28	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
23	Springs Open 2019 (B)	2019-08-31	2019-08-31	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
24	Bishop Bavin Open 2019 (B)	2019-08-17	2019-08-17	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
25	Ekurhuleni Trials (3)	2019-06-08	2019-06-08	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
26	Ekurhuleni Trials 2 2019 (U18+U20)	2019-04-27	2019-04-27	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
27	Ekurhuleni Trials 1 2019 (U18+U20)	2019-03-09	2019-03-09	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
28	Boksburg Open 2019 (B)	2019-01-19	2019-01-19	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
29	JNW Club - Maragon Open 2018 (C)	2018-08-04	2018-08-04	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
30	Witfield Open 2018 (B)	2018-07-21	2018-07-21	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
31	Ekurhuleni Trials 3 2018 (U18+U20)	2018-06-16	2018-06-16	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis

#	Games	Start				End
1	4	Tournament Wits 5th Trials 2024				Tournament Wits 5th Trials 2024
		date 2024-08-17	rnd 2	type Rapid	result 0.5	date 2024-08-17	rnd 5	type Rapid	result 1
		Opponent Hlonolofatso, M (Mailula)				Opponent Nndwamato, U (Uhone)
2	4	Tournament 2022 Gauteng Interregion				Tournament South African Open 2022
		date 2022-02-26	rnd 5	type Standard	result 1	date 2022-07-10	rnd 3	type Standard	result 0.5
		Opponent Shubham, K (Kale)				Opponent Adriaan, RD (Rynauw)
3	4	Tournament Ekurhuleni Chess Chessa Open 2021				Tournament Pinnacle College Waterfall Open
		date 2021-03-27	rnd 3	type Standard	result 1	date 2021-10-02	rnd 1	type Standard	result 1
		Opponent Manana, M (Musa)				Opponent Pillay De Bruyn, T (Trystan)

#	Games	Start				End
1	4	Tournament 2022 Gauteng Interregion				Tournament South African Open 2022
		date 2022-02-26	rnd 5	type Standard	result 1	date 2022-07-10	rnd 3	type Standard	result 0.5
		Opponent Shubham, K (Kale)				Opponent Adriaan, RD (Rynauw)
2	4	Tournament Ekurhuleni Chess Chessa Open 2021				Tournament Pinnacle College Waterfall Open
		date 2021-03-27	rnd 3	type Standard	result 1	date 2021-10-02	rnd 1	type Standard	result 1
		Opponent Manana, M (Musa)				Opponent Pillay De Bruyn, T (Trystan)
3	3	Tournament Ekurhuleni Trials 1 2019				Tournament Ekurhuleni Trials 1 2019
		date 2019-03-09	rnd 3	type Standard	result 1	date 2019-03-09	rnd 5	type Standard	result 1
		Opponent Nohanda, M (Malcolm)				Opponent Ndlovu, S (Shiluva)

#	Games	Start				End
1	4	Tournament Wits 5th Trials 2024				Tournament Wits 5th Trials 2024
		date 2024-08-17	rnd 2	type Rapid	result 0.5	date 2024-08-17	rnd 5	type Rapid	result 1
		Opponent Hlonolofatso, M (Mailula)				Opponent Nndwamato, U (Uhone)
2	3	Tournament Wits 4th Trials 2024				Tournament Wits 4th Trials 2024
		date 2024-07-27	rnd 3	type Rapid	result 0.5	date 2024-07-27	rnd 5	type Rapid	result 1
		Opponent Kadiaka, L (Lerato)				Opponent Ngcobo, A (Aphiwe)
3	2	Tournament WITS 6th Trials 2024				Tournament Wits 1st Trials 2025
		date 2024-09-21	rnd 5	type Rapid	result 0.5	date 2025-03-27	rnd 1	type Rapid	result 1
		Opponent Kadiaka, L (Lerato)				Opponent Buthelezi, M (Molemo)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Ekurhuleni Chess Chessa Open 2021				Tournament Pinnacle College Waterfall Open
		date 2021-03-27	rnd 3	type Standard	result 1	date 2021-10-02	rnd 1	type Standard	result 1
		Opponent Manana, M (Musa)				Opponent Pillay De Bruyn, T (Trystan)
2	3	Tournament Wits 5th Trials 2024				Tournament Wits 5th Trials 2024
		date 2024-08-17	rnd 3	type Rapid	result 1	date 2024-08-17	rnd 5	type Rapid	result 1
		Opponent Nakedi, T (Thuto Reginald)				Opponent Nndwamato, U (Uhone)
3	3	Tournament Ekurhuleni Trials 1 2019				Tournament Ekurhuleni Trials 1 2019
		date 2019-03-09	rnd 3	type Standard	result 1	date 2019-03-09	rnd 5	type Standard	result 1
		Opponent Nohanda, M (Malcolm)				Opponent Ndlovu, S (Shiluva)

#	Games	Start				End
1	4	Tournament Ekurhuleni Chess Chessa Open 2021				Tournament Pinnacle College Waterfall Open
		date 2021-03-27	rnd 3	type Standard	result 1	date 2021-10-02	rnd 1	type Standard	result 1
		Opponent Manana, M (Musa)				Opponent Pillay De Bruyn, T (Trystan)
2	3	Tournament Ekurhuleni Trials 1 2019				Tournament Ekurhuleni Trials 1 2019
		date 2019-03-09	rnd 3	type Standard	result 1	date 2019-03-09	rnd 5	type Standard	result 1
		Opponent Nohanda, M (Malcolm)				Opponent Ndlovu, S (Shiluva)
3	2	Tournament UJ @20 Years Chess Championship 2025				Tournament UJ @20 Years Chess Championship 2025
		date 2025-08-02	rnd 2	type Standard	result 1	date 2025-08-02	rnd 3	type Standard	result 1
		Opponent Hlazana, F (Frans)				Opponent Mzimela, N (Nkosinathi)

#	Games	Start				End
1	3	Tournament Wits 5th Trials 2024				Tournament Wits 5th Trials 2024
		date 2024-08-17	rnd 3	type Rapid	result 1	date 2024-08-17	rnd 5	type Rapid	result 1
		Opponent Nakedi, T (Thuto Reginald)				Opponent Nndwamato, U (Uhone)
2	2	Tournament Wits 4th Trials 2024				Tournament Wits 4th Trials 2024
		date 2024-07-27	rnd 4	type Rapid	result 1	date 2024-07-27	rnd 5	type Rapid	result 1
		Opponent Sikhonde, N (Nelisiwe)				Opponent Ngcobo, A (Aphiwe)
3	1	Tournament Wits 1st Trials 2025				Tournament Wits 1st Trials 2025
		date 2025-03-27	rnd 3	type Rapid	result 1	date 2025-03-27	rnd 3	type Rapid	result 1
		Opponent Ramphabana, A (Alex)				Opponent Ramphabana, A (Alex)

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	Nkomo ,B (Ben)	4	0.5	-318.8	4	0.5	-318.8	0	0	0	0	0	0
1	Nkomo ,B (Ben)	4	1281.9	963.1	4	1269.9	963.1	0	0	0	0	0	0
2	Slawson ,G (Gregory)	3	0	-425	3	0	-425	0	0	0	0	0	0
2	Slawson ,G (Gregory)	3	1133.5	708.5	3	1131.6	708.5	0	0	0	0	0	0
3	Fortuin ,J (Jeraldo)	3	3	425	3	3	425	0	0	0	0	0	0
3	Fortuin ,J (Jeraldo)	3	1052.2	1477.2	3	1029.6	1477.2	0	0	0	0	0	0
4	Schroeder ,D (Daniel)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Schroeder ,D (Daniel)	2	1430.3	1005.3	2	1426.9	1005.3	0	0	0	0	0	0
5	Naidoo ,K (Kirthan)	2	1	0	2	1	0	0	0	0	0	0	0
5	Naidoo ,K (Kirthan)	2	1263.4	1263.4	2	1245.5	1263.4	0	0	0	0	0	0
6	Hlongwane ,B (Blessing)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Hlongwane ,B (Blessing)	2	1477.9	1052.9	2	1485.9	1052.9	0	0	0	0	0	0
7	Bezuidenhout ,LP (Lian Pierre)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Bezuidenhout ,LP (Lian Pierre)	2	1390.1	965.1	2	1384.2	965.1	0	0	0	0	0	0
8	Chikwava ,R (Ronald)	2	2	425	2	2	425	0	0	0	0	0	0
8	Chikwava ,R (Ronald)	2	1507.3	1932.3	2	1509.2	1932.3	0	0	0	0	0	0
9	Wilson ,C (Caden)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Wilson ,C (Caden)	2	1461.5	1036.5	2	1439.3	1036.5	0	0	0	0	0	0
10	Aldum ,R (Rocco)	2	0	-425	2	0	-425	0	0	0	0	0	0
10	Aldum ,R (Rocco)	2	1298.8	873.8	2	1290.8	873.8	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Oberholzer, 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