Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jantjies, J (Jason)

Chess SA id

188013950

FIDE id

Date of birth

1988-07-20 (Adult)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-10-12

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1397.3	1391.2	1216.6	1224.3
Raw rating	1397.3	1391.2	1216.6	1224.3
Weighted rating	1397.2	1390.9	1216.6	1224.3
Weighted performance	1013.7	1003.9	0	0
Floor	904	900.7	716.6	724.3
K-factor	32	32	36	36
Min/Max rating change allowed	125.2	126.3	161.9	160.2
Highest rating	1420.3 2018-03-01	1457.5 2019-12-01	1216.6 2024-02-01	1291.6 2022-07-01
Highest raw rating	1404 2024-02-01	1400.7 2024-02-01	1216.6 2024-02-01	1224.3 2024-02-01
Highest weighted rating	1404 2024-10-01	1400.7 2024-10-01	1216.5 2025-08-01	1224.3 2025-02-01
Highest weighted performance	1420.3 2018-03-01	1457.5 2019-12-01	1200 2018-02-01	1291.6 2022-07-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1397.3	1391.2	1216.6	1224.3
Analysis
Rating	1397.3	1391.2	1216.6	1224.3
Raw rating	1397.3	1391.2	1216.6	1224.3
Weighted rating	1397.2	1390.9	1216.6
Weighted performance	1013.7	1003.9	0
K-factor	32	32	36	36
Floor	904	900.7	716.6	724.3
Max/Min rating change allowed	125.2	126.3	161.9	160.2
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	1397.3	1391.2	1216.6	1224.3
New weighted rating	1397	1390.7	1216.6	1224.3
New weighted performance	1013.2	1003.4	0	0
Temp new rating	1397.3	1391.2	1216.6	1224.3
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1397.3	1391.2	1216.6	1224.3
New K-factor	32	32	36	36
New floor	904	900.7	716.6	724.3

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	0	0	0	0
	4	4	0	0
	5	5	0	0
	43	21	6	16
	11	11	0	0
History	99	64	19	16

Games since
	Main 9	Standard 9		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Eden (WEG)
Province	Western Cape (WC)
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	99	53	53.54	30.1	1357.2	1387.2
Standard	64	35	54.69	39.8	1367.5	1407.3
Rapid	19	11	57.89	67.1	1222.8	1289.9
Blitz	16	7	43.75	-53.1	1475.4	1422.3

Date	Main	Standard	Rapid	Blitz
2025-09-30	1397.3	1391.2	1216.6	1224.3
2025-09-01	1397.3	1391.2	1216.6	1224.3
2025-08-01	1397.3	1391.2	1216.6	1224.3
2025-07-01	1397.3	1391.2	1216.6	1224.3
2025-06-01	1397.3	1391.1	1216.6	1224.3
2025-05-01	1397.3	1391.1	1216.6	1224.3
2025-04-01	1397.2	1390.9	1216.6	1224.3
2025-03-01	1397.1	1390.7	1216.6	1224.3
2025-02-01	1396.1	1389.3	1216.6	1224.3
2025-01-01	1384.3	1372.9	1216.6	1224.3
2024-12-01	1384.3	1372.9	1216.6	1224.3
2024-11-01	1384.3	1372.9	1216.6	1224.3
2024-10-01	1404	1400.7	1216.6	1224.3
2024-09-01	1404	1400.7	1216.6	1224.3
2024-08-01	1404	1400.7	1216.6	1224.3
2024-07-01	1404	1400.7	1216.6	1224.3
2024-06-01	1404	1400.7	1216.6	1224.3
2024-08-01	1404	1400.7	1216.6	1224.3
2024-04-01	1404	1400.7	1216.6	1224.3
2024-03-01	1404	1400.7	1216.6	1224.3
2024-02-01	1404	1400.7	1216.6	1224.3
2024-01-01	1404	1400.7	1216.6	1224.3
2023-12-01	1404	1400.7	1212	1224.3
2023-11-01	1404	1400.7	1212	1224.3

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	Eden Chess Union League 2024 (Premier)	2024-10-12	2024-10-12	Standard	Eden (WEG)	5	4	1	Yes	Analysis
2	Eden Chess Union League 2023 (Premier Division)	2023-11-11	2023-11-11	Standard	Eden (WEG)	5	5	4	Yes	Analysis
3	George Open 2022 (A)	2022-12-03	2022-12-03	Standard	Eden (WEG)	5	5	2.5	Yes	Analysis
4	VGK 2022 (Rapid Open)	2022-11-12	2022-11-12	Rapid	Eden (WEG)	6	6	4	Yes	Analysis
5	VGK 2022 (Blitz)	2022-11-12	2022-11-12	Blitz	Eden (WEG)	6	6	3	Yes	Analysis
6	South African Open 2022 (B)	2022-07-09	2022-07-17	Standard	Cape Town (WCT)	11	11	6	Yes	Analysis
7	South African Open 2022 (Blitz)	2022-07-14	2022-07-14	Blitz	Cape Town (WCT)	10	10	4	Yes	Analysis
8	George Open 2022 (A)	2022-06-11	2022-06-11	Standard	Eden (WEG)	5	5	2	Yes	Analysis
9	Western Cape Club Championships 2021 (A)	2021-10-15	2021-10-17	Standard	Eden (WEG)	6	6	2.5	Yes	Analysis
10	Eden Chess League 2021 (Premier)	2021-08-14	2021-08-15	Standard	Eden (WEG)	5	5	1	Yes	Analysis
11	George Open Chess Tournament 2019 (B)	2019-11-30	2019-12-01	Standard	Eden (WEG)	6	6	5	Yes	Analysis
12	Mossel Bay Chess Open 2019 (A)	2019-10-04	2019-10-05	Standard	Eden (WEG)	6	6	2.5	Yes	Analysis
13	Eden Chess League 2019 (1st Division)	2019-08-17	2019-08-24	Standard	Eden (WEG)	6	6	5	Yes	Analysis
14	Eden Chess League 2018 (2nd Division)	2018-09-01	2018-09-01	Rapid	Eden (WEG)	7	7	3	Yes	Analysis
15	Oyster Rapid 2018	2018-07-07	2018-07-07	Rapid	Eden (WEG)	6	6	4	Yes	Analysis
16	Western Cape Club Championships 2018	2018-03-16	2018-03-17	Standard	Eden (WEG)	6	5	3.5	Yes	Analysis

#	Games	Start				End
1	7	Tournament George Open 2022				Tournament Eden Chess Union League 2023
		date 2022-12-03	rnd 3	type Standard	result 1	date 2023-11-11	rnd 4	type Standard	result 1
		Opponent Hendricks, J (Jereldo)				Opponent Kiewiet, M (Melvin)
2	7	Tournament Eden Chess League 2019				Tournament Mossel Bay Chess Open 2019
		date 2019-08-17	rnd 2	type Standard	result 1	date 2019-10-04	rnd 2	type Standard	result 0.5
		Opponent Dubee, C (Cheslyn)				Opponent Botha, R (Ralph)
3	4	Tournament South African Open 2022				Tournament VGK 2022
		date 2022-07-16	rnd 9	type Standard	result 1	date 2022-11-12	rnd 1	type Blitz	result 1
		Opponent Gcuze, K (Khanya)				Opponent Da Silva, D (Darren)

#	Games	Start				End
1	7	Tournament George Open 2022				Tournament Eden Chess Union League 2023
		date 2022-12-03	rnd 3	type Standard	result 1	date 2023-11-11	rnd 4	type Standard	result 1
		Opponent Hendricks, J (Jereldo)				Opponent Kiewiet, M (Melvin)
2	7	Tournament Eden Chess League 2019				Tournament Mossel Bay Chess Open 2019
		date 2019-08-17	rnd 2	type Standard	result 1	date 2019-10-04	rnd 2	type Standard	result 0.5
		Opponent Dubee, C (Cheslyn)				Opponent Botha, R (Ralph)
3	3	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-16	rnd 9	type Standard	result 1	date 2022-07-17	rnd 11	type Standard	result 1
		Opponent Gcuze, K (Khanya)				Opponent Makaula, L (Lubanzi)

#	Games	Start				End
1	4	Tournament Eden Chess League 2018				Tournament Eden Chess League 2018
		date 2018-09-01	rnd 3	type Rapid	result 1	date 2018-09-01	rnd 6	type Rapid	result 0.5
		Opponent Kammies, E (Elmo)				Opponent Adams, D (Delbert)
2	2	Tournament VGK 2022				Tournament VGK 2022
		date 2022-11-12	rnd 3	type Rapid	result 1	date 2022-11-12	rnd 4	type Rapid	result 1
		Opponent Jansen, G (Giovante)				Opponent Swartbooi, G (Gabriel)
3	2	Tournament Oyster Rapid 2018				Tournament Oyster Rapid 2018
		date 2018-07-07	rnd 5	type Rapid	result 1	date 2018-07-07	rnd 6	type Rapid	result 1
		Opponent Meyer, J (Jared)				Opponent Muller, M (Mikyle)

#	Games	Start				End
1	2	Tournament VGK 2022				Tournament VGK 2022
		date 2022-11-12	rnd 5	type Blitz	result 1	date 2022-11-12	rnd 6	type Blitz	result 1
		Opponent Moses, J (Jay-Leigh)				Opponent Petersen, B (Brionay)
2	2	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 9	type Blitz	result 1
		Opponent Adams, J (Jedediah)				Opponent Naidoo, K (Kajol)
3	2	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 2	type Blitz	result 1	date 2022-07-14	rnd 3	type Blitz	result 1
		Opponent Ahmed, AM (Abdul)				Opponent Londt, CP (Christopher)

#	Games	Start				End
1	6	Tournament Eden Chess League 2019				Tournament Mossel Bay Chess Open 2019
		date 2019-08-17	rnd 2	type Standard	result 1	date 2019-10-04	rnd 1	type Standard	result 1
		Opponent Dubee, C (Cheslyn)				Opponent Davids, W (Welesley)
2	4	Tournament Eden Chess Union League 2023				Tournament Eden Chess Union League 2023
		date 2023-11-11	rnd 1	type Standard	result 1	date 2023-11-11	rnd 4	type Standard	result 1
		Opponent George, J (Jackie)				Opponent Kiewiet, M (Melvin)
3	4	Tournament South African Open 2022				Tournament VGK 2022
		date 2022-07-16	rnd 9	type Standard	result 1	date 2022-11-12	rnd 1	type Blitz	result 1
		Opponent Gcuze, K (Khanya)				Opponent Da Silva, D (Darren)

#	Games	Start				End
1	6	Tournament Eden Chess League 2019				Tournament Mossel Bay Chess Open 2019
		date 2019-08-17	rnd 2	type Standard	result 1	date 2019-10-04	rnd 1	type Standard	result 1
		Opponent Dubee, C (Cheslyn)				Opponent Davids, W (Welesley)
2	4	Tournament Eden Chess Union League 2023				Tournament Eden Chess Union League 2023
		date 2023-11-11	rnd 1	type Standard	result 1	date 2023-11-11	rnd 4	type Standard	result 1
		Opponent George, J (Jackie)				Opponent Kiewiet, M (Melvin)
3	3	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-16	rnd 9	type Standard	result 1	date 2022-07-17	rnd 11	type Standard	result 1
		Opponent Gcuze, K (Khanya)				Opponent Makaula, L (Lubanzi)

#	Games	Start				End
1	2	Tournament VGK 2022				Tournament VGK 2022
		date 2022-11-12	rnd 3	type Rapid	result 1	date 2022-11-12	rnd 4	type Rapid	result 1
		Opponent Jansen, G (Giovante)				Opponent Swartbooi, G (Gabriel)
2	2	Tournament Oyster Rapid 2018				Tournament Oyster Rapid 2018
		date 2018-07-07	rnd 5	type Rapid	result 1	date 2018-07-07	rnd 6	type Rapid	result 1
		Opponent Meyer, J (Jared)				Opponent Muller, M (Mikyle)
3	2	Tournament Oyster Rapid 2018				Tournament Oyster Rapid 2018
		date 2018-07-07	rnd 1	type Rapid	result 1	date 2018-07-07	rnd 2	type Rapid	result 1
		Opponent Kiewiets, M (Morne)				Opponent Petersen, JD (John-Wayne)

#	Games	Start				End
1	2	Tournament VGK 2022				Tournament VGK 2022
		date 2022-11-12	rnd 5	type Blitz	result 1	date 2022-11-12	rnd 6	type Blitz	result 1
		Opponent Moses, J (Jay-Leigh)				Opponent Petersen, B (Brionay)
2	2	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 9	type Blitz	result 1
		Opponent Adams, J (Jedediah)				Opponent Naidoo, K (Kajol)
3	2	Tournament South African Open 2022				Tournament South African Open 2022
		date 2022-07-14	rnd 2	type Blitz	result 1	date 2022-07-14	rnd 3	type Blitz	result 1
		Opponent Ahmed, AM (Abdul)				Opponent Londt, CP (Christopher)

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	Cloete ,R (Ralph)	4	0	-425	2	0	-425	1	0	-425	1	0	-425
1	Cloete ,R (Ralph)	4	1483.3	1058.3	2	1439.5	1058.3	1	1443.6	1058.3	1	1332.5	1058.3
2	Daniels ,R (Reuben)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
2	Daniels ,R (Reuben)	3	1428.7	1287	3	1430.8	1287	0	0	0	0	0	0
3	Jaars ,T (Thomas)	3	0	-425	3	0	-425	0	0	0	0	0	0
3	Jaars ,T (Thomas)	3	1468.7	1043.7	3	1488.2	1043.7	0	0	0	0	0	0
4	Williams ,I (Igor)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
4	Williams ,I (Igor)	3	1301.2	1442.9	3	1314.4	1442.9	0	0	0	0	0	0
5	Swart ,G (George)	3	0	-425	2	0	-425	1	0	-425	0	0	0
5	Swart ,G (George)	3	1588.8	1163.8	2	1590.8	1163.8	1	1476.8	1163.8	0	0	0
6	Botha ,R (Ralph)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
6	Botha ,R (Ralph)	2	1394.6	1182.1	2	1264.1	1182.1	0	0	0	0	0	0
7	Swart ,S (Sune)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
7	Swart ,S (Sune)	2	1449.4	1661.9	2	1456.6	1661.9	0	0	0	0	0	0
8	Coetzee ,JS (Jurgen Shaun)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Coetzee ,JS (Jurgen Shaun)	2	1444.8	1019.8	2	1439.2	1019.8	0	0	0	0	0	0
9	Campbell ,G (Grant)	2	1	0	2	1	0	0	0	0	0	0	0
9	Campbell ,G (Grant)	2	1355.9	1355.9	2	1359.2	1355.9	0	0	0	0	0	0
10	Du Plessis ,A (Arno)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
10	Du Plessis ,A (Arno)	2	1461.2	1673.7	2	1449.2	1673.7	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

Jantjies, J (Jason)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms