Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jacobs, A (Amethyst)

Chess SA id

102092137

FIDE id

Date of birth

2002-05-14 (Adult)

Gender

Male

Region

Pixley-ka-Seme (NCP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-05-17

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1448.7	1460.1	1200	1200
Raw rating	1448.7	1460.1	1200	1200
Weighted rating	1416.3	1421.2	1200	1200
Weighted performance	791.5	793	0	0
Floor	948.7	960.1	700	700
K-factor	32	32	36	36
Min/Max rating change allowed	116.4	114.5	165.8	165.8
Highest rating	1448.7 2025-06-01	1460.1 2025-06-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1448.7 2025-06-01	1460.1 2025-06-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1448.7 2021-06-01	1460.1 2021-06-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1433 2019-07-01	1433.7 2019-07-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1448.7	1460.1	1200	1200
Analysis
Rating	1448.7	1460.1	1200	1200
Raw rating	1448.7	1460.1	1200	1200
Weighted rating	1416.3	1421.2	1200
Weighted performance	791.5	793	0
K-factor	32	32	36	36
Floor	948.7	960.1	700	700
Max/Min rating change allowed	116.4	114.5	165.8	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	1448.7	1460.1	1200	1200
New weighted rating	1419.6	1425.1	1200	1200
New weighted performance	791	792.5	0	0
Temp new rating	1448.7	1460.1	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1448.7	1460.1	1200	1200
New K-factor	32	32	36	36
New floor	948.7	960.1	700	700

Item	Main	Standard
	0	0
	5	5
	0	0
	0	0
	0	0
	0	0
History	96	96

Games since
	Main 5	Standard 5		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Pixley-ka-Seme (NCP)
Province	Northern Cape (NC)
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	5	4.5	90	340	1373.3	1713.3
Standard	5	4.5	90	340	1373.3	1713.3
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	96	58.5	60.94	93	1169	1262
Standard	96	58.5	60.94	93	1169	1262
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1448.7	1460.1	1200	1200
2025-09-01	1448.7	1460.1	1200	1200
2025-08-01	1448.7	1460.1	1200	1200
2025-07-01	1448.7	1460.1	1200	1200
2025-06-01	1448.7	1460.1	1200	1200
2025-05-01	1397.6	1398.7	1200	1200
2025-04-01	1397.6	1398.7	1200	1200
2025-03-01	1397.6	1398.7	1200	1200
2025-02-01	1397.6	1398.7	1200	1200
2025-01-01	1397.6	1398.7	1200	1200
2024-12-01	1397.6	1398.7	1200	1200
2024-11-01	1397.6	1398.7	1200	1200
2024-10-01	1397.6	1398.7	1200	1200
2024-09-01	1397.6	1398.7	1200	1200
2024-08-01	1397.6	1398.7	1200	1200
2024-07-01	1397.6	1398.7	1200	1200
2024-06-01	1397.6	1398.7	1200	1200
2024-08-01	1397.6	1398.7	1200	1200
2024-04-01	1397.6	1398.7	1200	1200
2024-03-01	1397.6	1398.7	1200	1200
2024-02-01	1397.6	1398.7	1200	1200
2024-01-01	1397.6	1398.7	1200	1200
2023-12-01	1397.6	1398.7	1200	1200
2023-11-01	1397.6	1398.7	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	2025 Hopetown Schools Chess Tournament (U15-U19)	2025-05-17	2025-05-17	Standard	Pixley-ka-Seme (NCP)	5	5	4.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Hopetown Schools Chess Tournament (U15-U19)	2025-05-17	2025-05-17	Standard	Pixley-ka-Seme (NCP)	5	5	4.5	Yes	Analysis
2	NC Open 2020 (B)	2020-02-28	2020-03-01	Standard	Frances Baard (NCF)	5	5	3	Yes	Analysis
3	Kimberley Chess Club Christmas Open 2019 (B)	2019-12-06	2019-12-07	Standard	Frances Baard (NCF)	5	5	3	Yes	Analysis
4	Kimberley Chess Club Schools` Open 2019 (U17+U19 Open)	2019-07-20	2019-07-20	Standard	Frances Baard (NCF)	5	5	4	Yes	Analysis
5	2019 SA Schools Winter Games (U18 Boys)	2019-07-01	2019-07-04	Standard	Ethekwini (KED)	7	7	4	Yes	Analysis
6	South African Schools Individuals Chess Championships 2019 (U17+U19 Open)	2019-06-18	2019-06-21	Standard	Frances Baard (NCF)	7	7	3.5	Yes	Analysis
7	Northern Cape Trails 2019 (U18 Boys)	2019-06-13	2019-06-13	Standard	ZF Mgcawu (NZF)	5	5	4.5	Yes	Analysis
8	Inter Regional Chess Championship 2019 (U18)	2019-05-10	2019-05-11	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis
9	Pixley ka Seme Schools Trials 2019 (U18 Boys)	2019-03-09	2019-03-09	Standard	Pixley-ka-Seme (NCP)	5	5	2.5	Yes	Analysis
10	Frances Baard Schools Open Tournament 2019 (U17+Open Boys)	2019-01-29	2019-01-29	Standard	Frances Baard (NCF)	5	5	3	Yes	Analysis
11	South African Junior Team Championships 2018 (U18C)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
12	Northern Cape Closed Chess Championships 2018 (U18 Open)	2018-08-31	2018-09-01	Standard	Frances Baard (NCF)	5	5	1.5	Yes	Analysis
13	Frances Baard Schools Open (U17+U19 Boys)	2018-08-17	2018-08-18	Standard	Frances Baard (NCF)	6	6	4	Yes	Analysis
14	LDA Open Tournament 2018 (A)	2018-07-21	2018-07-21	Standard	Pixley-ka-Seme (NCP)	5	5	3.5	Yes	Analysis
15	NC Provincial Schools Eliminations 2018 (U18 Open)	2018-06-23	2018-06-23	Standard	Frances Baard (NCF)	5	5	3.5	Yes	Analysis
16	Inter Regional 2018 (U18 Team)	2018-05-04	2018-05-05	Standard	Frances Baard (NCF)	5	4	1	Yes	Analysis
17	Pixley Schools District Eliminations 2018 (U17+U19)	2018-04-14	2018-04-14	Standard	Pixley-ka-Seme (NCP)	5	5	3	Yes	Analysis
18	Pixley ka Seme Open 2018 (U18-Adult)	2018-02-10	2018-02-10	Standard	Pixley-ka-Seme (NCP)	5	5	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament Inter Regional Chess Championship 2019				Tournament Northern Cape Trails 2019
		date 2019-05-11	rnd 5	type Standard	result 1	date 2019-06-13	rnd 5	type Standard	result 0.5
		Opponent Moletsane, OP (Oreratile)				Opponent Applegreen, T (Thuto)
2	5	Tournament 2025 Hopetown Schools Chess Tournament				Tournament 2025 Hopetown Schools Chess Tournament
		date 2025-05-17	rnd 1	type Standard	result 1	date 2025-05-17	rnd 5	type Standard	result 0.5
		Opponent Naude, L (Leonard)				Opponent Kitengye, PE (Patrick Ebondo)
3	5	Tournament Inter Regional 2018				Tournament NC Provincial Schools Eliminations 2018
		date 2018-05-05	rnd 5	type Standard	result 1	date 2018-06-23	rnd 4	type Standard	result 1
		Opponent Kamvelihle, Z (Zumani)				Opponent Applegreen, T (Thuto)

#	Games	Start				End
1	6	Tournament Inter Regional Chess Championship 2019				Tournament Northern Cape Trails 2019
		date 2019-05-11	rnd 5	type Standard	result 1	date 2019-06-13	rnd 5	type Standard	result 0.5
		Opponent Moletsane, OP (Oreratile)				Opponent Applegreen, T (Thuto)
2	5	Tournament 2025 Hopetown Schools Chess Tournament				Tournament 2025 Hopetown Schools Chess Tournament
		date 2025-05-17	rnd 1	type Standard	result 1	date 2025-05-17	rnd 5	type Standard	result 0.5
		Opponent Naude, L (Leonard)				Opponent Kitengye, PE (Patrick Ebondo)
3	5	Tournament Inter Regional 2018				Tournament NC Provincial Schools Eliminations 2018
		date 2018-05-05	rnd 5	type Standard	result 1	date 2018-06-23	rnd 4	type Standard	result 1
		Opponent Kamvelihle, Z (Zumani)				Opponent Applegreen, T (Thuto)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Inter Regional Chess Championship 2019				Tournament Northern Cape Trails 2019
		date 2019-05-11	rnd 5	type Standard	result 1	date 2019-06-13	rnd 4	type Standard	result 1
		Opponent Moletsane, OP (Oreratile)				Opponent Van Der Westhuizen, E (Ettienne)
2	4	Tournament 2025 Hopetown Schools Chess Tournament				Tournament 2025 Hopetown Schools Chess Tournament
		date 2025-05-17	rnd 1	type Standard	result 1	date 2025-05-17	rnd 4	type Standard	result 1
		Opponent Naude, L (Leonard)				Opponent Madyo, M (Mbuyiselo)
3	3	Tournament NC Open 2020				Tournament NC Open 2020
		date 2020-02-28	rnd 1	type Standard	result 1	date 2020-02-29	rnd 3	type Standard	result 1
		Opponent Dioka, K (Kagelelo)				Opponent Thomas, K (Katlego)

#	Games	Start				End
1	5	Tournament Inter Regional Chess Championship 2019				Tournament Northern Cape Trails 2019
		date 2019-05-11	rnd 5	type Standard	result 1	date 2019-06-13	rnd 4	type Standard	result 1
		Opponent Moletsane, OP (Oreratile)				Opponent Van Der Westhuizen, E (Ettienne)
2	4	Tournament 2025 Hopetown Schools Chess Tournament				Tournament 2025 Hopetown Schools Chess Tournament
		date 2025-05-17	rnd 1	type Standard	result 1	date 2025-05-17	rnd 4	type Standard	result 1
		Opponent Naude, L (Leonard)				Opponent Madyo, M (Mbuyiselo)
3	3	Tournament NC Open 2020				Tournament NC Open 2020
		date 2020-02-28	rnd 1	type Standard	result 1	date 2020-02-29	rnd 3	type Standard	result 1
		Opponent Dioka, K (Kagelelo)				Opponent Thomas, K (Katlego)

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	Links ,B (Bradley)	5	3	85	5	3	85	0	0	0	0	0	0
1	Links ,B (Bradley)	5	1182	1267	5	1175.3	1267	0	0	0	0	0	0
2	Oliphant ,D (Deaquin)	5	2	-85	5	2	-85	0	0	0	0	0	0
2	Oliphant ,D (Deaquin)	5	1253.8	1168.8	5	1255.6	1168.8	0	0	0	0	0	0
3	Jacobs ,B (Breyton)	2	2	425	2	2	425	0	0	0	0	0	0
3	Jacobs ,B (Breyton)	2	1208.2	1633.2	2	1239.1	1633.2	0	0	0	0	0	0
4	Kamvelihle ,Z (Zumani)	2	1	0	2	1	0	0	0	0	0	0	0
4	Kamvelihle ,Z (Zumani)	2	1087.2	1087.2	2	1068.8	1087.2	0	0	0	0	0	0
5	Van Reenen ,P (Phoeboe)	2	2	425	2	2	425	0	0	0	0	0	0
5	Van Reenen ,P (Phoeboe)	2	604.4	1029.4	2	624	1029.4	0	0	0	0	0	0
6	Applegreen ,T (Thuto)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
6	Applegreen ,T (Thuto)	2	1217.1	1429.6	2	1220.2	1429.6	0	0	0	0	0	0
7	Sagrys ,M (Miguel)	2	1	0	2	1	0	0	0	0	0	0	0
7	Sagrys ,M (Miguel)	2	1279.6	1279.6	2	1280.8	1279.6	0	0	0	0	0	0
8	Cedras ,C (Crusadian)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
8	Cedras ,C (Crusadian)	2	1218.9	1006.4	2	1227.2	1006.4	0	0	0	0	0	0
9	Michael ,X (Xolile)	2	1	0	2	1	0	0	0	0	0	0	0
9	Michael ,X (Xolile)	2	1057.9	1057.9	2	1058.6	1057.9	0	0	0	0	0	0
10	Botes ,A (Armand)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
10	Botes ,A (Armand)	2	1053.9	841.4	2	1051.3	841.4	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

Jacobs, A (Amethyst)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms