Chess South Africa Ratings Database

PLAYER PAGE

Personal

Oberholzer, JD (Dev)

Chess SA id

152028682

FIDE id

Date of birth

1952-03-12 (Adult)

Gender

Male

Region

Ethekwini (KED)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-09-19

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1237.5	1224.8	1500	1500
Raw rating	1237.5	1224.8	1500	1500
Weighted rating	1237.3	1224.5	1497	1497.2
Weighted performance	0	0	0	0
Floor	760.8	762.4	1000	1000
K-factor	36	36	32	32
Min/Max rating change allowed	157.2	160.1	108.1	108.1
Highest rating	1378 2020-03-01	1386.8 2020-03-01	1500 2024-02-01	1500 2024-02-01
Highest raw rating	1260.8 2020-04-01	1262.4 2020-04-01	1500 2024-02-01	1500 2024-02-01
Highest weighted rating	1260.8 2022-03-01	1262.4 2022-03-01	1490 2025-08-01	1490.8 2025-08-01
Highest weighted performance	1378 2020-03-01	1386.8 2020-03-01	1200 2024-02-01	1287.6 2022-07-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1237.5	1224.8	1500	1500
Analysis
Rating	1237.5	1224.8	1500	1500
Raw rating	1237.5	1224.8	1500	1500
Weighted rating	1237.3	1224.5	1497
Weighted performance	0	0	0
K-factor	36	36	32	32
Floor	760.8	762.4	1000	1000
Max/Min rating change allowed	157.2	160.1	108.1	108.1
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	1237.5	1224.8	1500	1500
New weighted rating	1237.1	1224.3	1499	1499.1
New weighted performance	0	0	0	0
Temp new rating	1237.5	1224.8	1500	1500
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1237.5	1224.8	1500	1500
New K-factor	36	36	32	32
New floor	760.8	762.4	1000	1000

Item	Main	Standard	Blitz
	0	0	0
	0	0	0
	6	6	0
	5	5	0
	21	11	10
	0	0	0
History	40	30	10

Games since
	Main 6	Standard 6		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Ethekwini (KED)
Province	KwaZulu Natal (KZ)
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	40	15	37.5	-106.2	1360.6	1254.3
Standard	30	10.5	35	-127.5	1343.9	1216.4
Rapid	0	0	0	0	0	0
Blitz	10	4.5	45	-42.5	1410.7	1368.2

Date	Main	Standard	Rapid	Blitz
2025-09-30	1237.5	1224.8	1500	1500
2025-09-01	1237.5	1224.8	1500	1500
2025-08-01	1237.5	1224.8	1500	1500
2025-07-01	1237.5	1224.8	1500	1500
2025-06-01	1237.4	1224.8	1500	1500
2025-05-01	1237.3	1224.8	1500	1500
2025-04-01	1237.2	1224.7	1500	1500
2025-03-01	1236.9	1224.5	1500	1500
2025-02-01	1235.2	1222.8	1500	1500
2025-01-01	1215	1201.6	1500	1500
2024-12-01	1215	1201.6	1500	1500
2024-11-01	1215	1201.6	1500	1500
2024-10-01	1215	1201.6	1500	1500
2024-09-01	1257.7	1244.5	1500	1500
2024-08-01	1257.7	1244.5	1500	1500
2024-07-01	1257.7	1244.5	1500	1500
2024-06-01	1257.7	1244.5	1500	1500
2024-08-01	1257.7	1244.5	1500	1500
2024-04-01	1257.7	1244.5	1500	1500
2024-03-01	1257.7	1244.5	1500	1500
2024-02-01	1257.7	1244.5	1500	1500
2024-01-01	1257.7	1244.5	1500	1500
2023-12-01	1220.2	1212	1200	1224.4
2023-11-01	1220.2	1212	1200	1224.4

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	2024 Durban Chess Club Second Swiss	2024-08-01	2024-09-19	Standard	Ethekwini (KED)	8	6	1	Yes	Analysis
2	South African Open Chess Championship 2024 (Blitz)	2024-07-04	2024-07-04	Blitz	Ethekwini (KED)	11	0	0	No	Analysis
3	2024 Durban Chess Club Revive Swiss	2024-01-18	2024-04-04	Standard	Ethekwini (KED)	9	0	0	No	Analysis
4	Durban Chess Clarence Championship 2023 (A)	2023-03-18	2023-03-18	Standard	Ethekwini (KED)	5	5	2	Yes	Analysis
5	South African Open 2022 (B)	2022-07-09	2022-07-17	Standard	Cape Town (WCT)	11	11	3.5	Yes	Analysis
6	South African Open 2022 (Blitz)	2022-07-14	2022-07-14	Blitz	Cape Town (WCT)	10	10	4.5	Yes	Analysis
7	2020 Moss Kolnik Memorial Swiss	2020-01-16	2020-03-05	Standard	Ethekwini (KED)	8	8	4	Yes	Analysis

#	Games	Start				End
1	4	Tournament 2020 Moss Kolnik Memorial Swiss				Tournament 2020 Moss Kolnik Memorial Swiss
		date 2020-01-30	rnd 3	type Standard	result 1	date 2020-02-20	rnd 6	type Standard	result 1
		Opponent Mahadeo, S (Shreeya)				Opponent Millard, C (Charlotte)
2	2	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 10	type Blitz	result 1	date 2022-07-15	rnd 8	type Standard	result 0.5
		Opponent Coetzee, JS (Justin)				Opponent Oberholzer, E (Ethan)
3	2	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 5	type Blitz	result 0.5	date 2022-07-14	rnd 6	type Blitz	result 1
		Opponent Adams, J (Jedediah)				Opponent Devine, C (Cody)

#	Games	Start				End
1	4	Tournament 2020 Moss Kolnik Memorial Swiss				Tournament 2020 Moss Kolnik Memorial Swiss
		date 2020-01-30	rnd 3	type Standard	result 1	date 2020-02-20	rnd 6	type Standard	result 1
		Opponent Mahadeo, S (Shreeya)				Opponent Millard, C (Charlotte)
2	2	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-10	rnd 4	type Standard	result 1	date 2022-07-11	rnd 5	type Standard	result 1
		Opponent Jurgens, C (C)				Opponent Jaftha, J (Jeyhlin)
3	1	Tournament 2024 Durban Chess Club Second Swiss				Tournament 2024 Durban Chess Club Second Swiss
		date 2024-09-19	rnd 8	type Standard	result 1	date 2024-09-19	rnd 8	type Standard	result 1
		Opponent Buckas, I (Imtiaz)				Opponent Buckas, I (Imtiaz)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 5	type Blitz	result 0.5	date 2022-07-14	rnd 6	type Blitz	result 1
		Opponent Adams, J (Jedediah)				Opponent Devine, C (Cody)
2	1	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 10	type Blitz	result 1	date 2022-07-14	rnd 10	type Blitz	result 1
		Opponent Coetzee, JS (Justin)				Opponent Coetzee, JS (Justin)
3	1	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 8	type Blitz	result 1	date 2022-07-14	rnd 8	type Blitz	result 1
		Opponent Johnson, A (Azriel)				Opponent Johnson, A (Azriel)

#	Games	Start				End
1	4	Tournament 2020 Moss Kolnik Memorial Swiss				Tournament 2020 Moss Kolnik Memorial Swiss
		date 2020-01-30	rnd 3	type Standard	result 1	date 2020-02-20	rnd 6	type Standard	result 1
		Opponent Mahadeo, S (Shreeya)				Opponent Millard, C (Charlotte)
2	2	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-10	rnd 4	type Standard	result 1	date 2022-07-11	rnd 5	type Standard	result 1
		Opponent Jurgens, C (C)				Opponent Jaftha, J (Jeyhlin)
3	1	Tournament 2024 Durban Chess Club Second Swiss				Tournament 2024 Durban Chess Club Second Swiss
		date 2024-09-19	rnd 8	type Standard	result 1	date 2024-09-19	rnd 8	type Standard	result 1
		Opponent Buckas, I (Imtiaz)				Opponent Buckas, I (Imtiaz)

#	Games	Start				End
1	4	Tournament 2020 Moss Kolnik Memorial Swiss				Tournament 2020 Moss Kolnik Memorial Swiss
		date 2020-01-30	rnd 3	type Standard	result 1	date 2020-02-20	rnd 6	type Standard	result 1
		Opponent Mahadeo, S (Shreeya)				Opponent Millard, C (Charlotte)
2	2	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-10	rnd 4	type Standard	result 1	date 2022-07-11	rnd 5	type Standard	result 1
		Opponent Jurgens, C (C)				Opponent Jaftha, J (Jeyhlin)
3	1	Tournament 2024 Durban Chess Club Second Swiss				Tournament 2024 Durban Chess Club Second Swiss
		date 2024-09-19	rnd 8	type Standard	result 1	date 2024-09-19	rnd 8	type Standard	result 1
		Opponent Buckas, I (Imtiaz)				Opponent Buckas, I (Imtiaz)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 10	type Blitz	result 1	date 2022-07-14	rnd 10	type Blitz	result 1
		Opponent Coetzee, JS (Justin)				Opponent Coetzee, JS (Justin)
2	1	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 8	type Blitz	result 1	date 2022-07-14	rnd 8	type Blitz	result 1
		Opponent Johnson, A (Azriel)				Opponent Johnson, A (Azriel)
3	1	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 6	type Blitz	result 1	date 2022-07-14	rnd 6	type Blitz	result 1
		Opponent Devine, C (Cody)				Opponent Devine, C (Cody)

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	Nzama ,C (Cedric)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Nzama ,C (Cedric)	1	1424	999	1	1454.3	999	0	0	0	0	0	0
2	Jurgens ,C (C)	1	1	425	1	1	425	0	0	0	0	0	0
2	Jurgens ,C (C)	1	1227.4	1652.4	1	1256.4	1652.4	0	0	0	0	0	0
3	Oberholzer ,E (Ethan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
3	Oberholzer ,E (Ethan)	1	1277.1	1277.1	1	1266.8	1277.1	0	0	0	0	0	0
4	Schwartz ,M (Michael)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Schwartz ,M (Michael)	1	1470.3	1045.3	1	1446.7	1045.3	0	0	0	0	0	0
5	Kommuru ,A (Akhil)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Kommuru ,A (Akhil)	1	1156.8	731.8	1	1147.2	731.8	0	0	0	0	0	0
6	Zondi ,S (Sethu)	1	1	425	1	1	425	0	0	0	0	0	0
6	Zondi ,S (Sethu)	1	1240.4	1665.4	1	1214.4	1665.4	0	0	0	0	0	0
7	Kiewiet ,M (Marvin)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Kiewiet ,M (Marvin)	1	1330.6	905.6	1	1311.9	905.6	0	0	0	0	0	0
8	Buckas ,A (Abu)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Buckas ,A (Abu)	1	1419.2	994.2	1	1418.2	994.2	0	0	0	0	0	0
9	Ndlovu ,M (Mfanelo)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Ndlovu ,M (Mfanelo)	1	1178.6	753.6	1	1162.4	753.6	0	0	0	0	0	0
10	Venter ,Z (Zanri)	1	1	425	1	1	425	0	0	0	0	0	0
10	Venter ,Z (Zanri)	1	1199	1624	1	1192.1	1624	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Oberholzer, JD (Dev)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms