Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jacobs, GJ (Gerhard Jakobus)

Chess SA id

177086357

FIDE id

Date of birth

1977-05-05 (Adult)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-05-10

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1504.1	1489.7	1316	1336.2
Raw rating	1504.1	1489.7	1316	1336.2
Weighted rating	1487.2	1477	1315.7	1320.4
Weighted performance	1351	1361.2	0	1112.9
Floor	1033.7	1020.2	821.1	861.4
K-factor	32	32	36	36
Min/Max rating change allowed	107.5	109.7	140.6	136.6
Highest rating	1533.7 2025-01-01	1520.2 2024-11-01	1321.1 2022-12-01	1554.3 2018-12-01
Highest raw rating	1533.7 2025-01-01	1520.2 2024-11-01	1321.1 2022-12-01	1361.4 2019-01-01
Highest weighted rating	1477.9 2025-08-01	1468.6 2025-08-01	1321.1 2024-09-01	1361.4 2019-05-01
Highest weighted performance	1528.6 2024-11-01	1520.2 2024-11-01	1238.6 2019-05-01	1554.3 2018-12-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1504.1	1489.7	1316	1336.2
Analysis
Rating	1504.1	1489.7	1316	1336.2
Raw rating	1504.1	1489.7	1316	1336.2
Weighted rating	1487.2	1477	1315.7
Weighted performance	1351	1361.2	0
K-factor	32	32	36	36
Floor	1033.7	1020.2	821.1	861.4
Max/Min rating change allowed	107.5	109.7	140.6	136.6
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	1504.1	1489.7	1316	1336.2
New weighted rating	1491.2	1480.6	1315.8	1323.1
New weighted performance	1350.5	1360.7	0	1112.5
Temp new rating	1504.1	1489.7	1316	1336.2
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1504.1	1489.7	1316	1336.2
New K-factor	32	32	36	36
New floor	1033.7	1020.2	821.1	861.4

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	10	10	0	0
	49	31	0	18
	58	6	5	47
	28	4	6	18
	12	5	0	7
History	275	140	21	114

Games since
	Main 84	Standard 41		Rapid 5		Blitz 38
Gender	Male
Age group	Adult
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	1234		429		158
Male	1063		363		133
Adult	399		145		54
Adult Male	374		136		50
Standard
	RSA		Province		Region
Overall	1257		459		171
Male	1070		386		143
Adult	372		145		55
Adult Male	348		136		51
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	243		76		24
Male	232		71		22
Adult	176		55		18
Adult Male	170		53		17


	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	5	50	0	1434.7	1434.7
Standard	10	5	50	0	1434.7	1434.7
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	242	123	50.83	7	1378	1385
Standard	114	60.5	53.07	26.1	1359.4	1385.5
Rapid	21	12	57.14	60.7	1319.2	1379.9
Blitz	107	50.5	47.2	-23.8	1409.3	1385.5

Date	Main	Standard	Rapid	Blitz
2025-09-30	1504.1	1489.7	1316	1336.2
2025-09-01	1504.1	1489.7	1316	1336.2
2025-08-01	1504.1	1489.7	1316	1336.2
2025-07-01	1504.1	1489.7	1316	1336.2
2025-06-01	1504.1	1489.7	1316	1336.2
2025-05-01	1527.1	1516.6	1316	1336.2
2025-04-01	1527.1	1516.6	1316	1336.2
2025-03-01	1527.1	1516.6	1316	1336.2
2025-02-01	1527.1	1516.6	1316	1336.2
2025-01-01	1533.7	1520.2	1315.3	1336.2
2024-12-01	1528.6	1520.2	1315.3	1302.7
2024-11-01	1528.6	1520.2	1315.3	1302.7
2024-10-01	1464.6	1468.4	1315.3	1302.7
2024-09-01	1464.6	1468.4	1315.3	1302.7
2024-08-01	1400.7	1396.1	1315.3	1302.7
2024-07-01	1386.4	1378.1	1315.3	1302.7
2024-06-01	1375.1	1369.8	1315.3	1270.7
2024-08-01	1370.9	1362.6	1315.3	1270.7
2024-04-01	1370.9	1362.6	1315.3	1270.7
2024-03-01	1370.9	1362.6	1315.3	1270.7
2024-02-01	1370.9	1362.6	1315.3	1270.7
2024-01-01	1370.9	1362.6	1315.3	1270.7
2023-12-01	1370.9	1356.8	1315.3	1270.7
2023-11-01	1362.2	1356.8	1315.3	1198.3

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	Centurion Club Closed Chess Tournament 2025	2025-05-10	2025-05-10	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
2	2025 Tshwane Chess OPEN Registration Tournament (A2)	2025-01-25	2025-01-25	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Centurion Club Closed Chess Tournament 2025	2025-05-10	2025-05-10	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
2	2025 Tshwane Chess OPEN Registration Tournament (A2)	2025-01-25	2025-01-25	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
3	CCC Blitz 2024	2024-12-04	2024-12-04	Blitz	Tshwane (GTP)	9	9	5	Yes	Analysis
4	2024 Tshwane Chess Club Clash (Open)	2024-10-12	2024-10-12	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
5	Bojanala's FIDE In The Sparkling Waters 2024 (Rooks)	2024-08-16	2024-08-18	Standard	Bojanala Platina (NBR)	6	6	5	Yes	Analysis
6	Eureka Open 27 July 2024 (C)	2024-07-27	2024-07-27	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
7	2024 Midstream College Open Chess Tournament (B1)	2024-07-20	2024-07-20	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
8	2024 Tshwane Chess FIDE RATED Blitz League Championship 1	2024-05-26	2024-05-26	Blitz	Tshwane (GTP)	9	9	5	Yes	Analysis
9	2024 Johannes Mabusela's 40th Birthday Chess Tournament F Section (C)	2024-06-01	2024-06-01	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
10	2024 Centurion Club Closed Chess Tournament (A)	2024-05-25	2024-05-25	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
11	CCC Blitz All 2023	2023-12-06	2023-12-06	Blitz	Tshwane (GTP)	9	9	6	Yes	Analysis
12	CCC Midstream Rapid 2023	2023-11-27	2023-11-27	Rapid	Tshwane (GTP)	5	5	3	Yes	Analysis
13	Tshwane Chess Arbiter Norm Blitz Tournament 2023	2023-10-29	2023-10-29	Blitz	Tshwane (GTP)	11	11	7	Yes	Analysis
14	2023 Centurion Club Championships	2023-07-19	2023-09-06	Standard	Tshwane (GTP)	6	6	4	Yes	Analysis
15	Tshwane Chess FIDE Rated Blitz League 3 2023	2023-07-16	2023-07-16	Blitz	Tshwane (GTP)	9	9	4.5	Yes	Analysis
16	2023 Tshwane Chess FIDE Rated Blitz League 2	2023-06-11	2023-06-11	Blitz	Tshwane (GTP)	9	9	4	Yes	Analysis
17	2023 Tshwane Chess FIDE Rated Blitz League 1	2023-05-28	2023-05-28	Blitz	Tshwane (GTP)	9	9	4	Yes	Analysis
18	2022 Centurion Club Blitz	2022-11-30	2022-11-30	Blitz	Tshwane (GTP)	9	9	4	Yes	Analysis
19	CPH Chess Clubs Challenge 2022 (B)	2022-11-12	2022-11-12	Rapid	Johannesburg Metro (GJM)	6	6	4	Yes	Analysis
20	2022 Centurion Club Championships	2022-05-11	2022-06-22	Standard	Tshwane (GTP)	6	4	1	Yes	Analysis
21	Rachella`s Cafe Blitz Tournament 1 2022	2022-03-20	2022-03-20	Blitz	Tshwane (GTP)	9	9	3	Yes	Analysis
22	2021 CCC Inhouse Blitz (A)	2021-11-24	2021-11-24	Blitz	Tshwane (GTP)	7	7	2	Yes	Analysis
23	2021 CCC Inhouse (A)	2021-10-20	2021-11-17	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
24	2020 CC Annual Opener	2020-01-29	2020-03-11	Standard	Tshwane (GTP)	6	5	3	Yes	Analysis
25	2020 Registration Tournament (B)	2020-01-25	2020-01-25	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
26	2019 Centurion Chess Tournament	2019-10-02	2019-10-30	Standard	Tshwane (GTP)	5	4	2	Yes	Analysis
27	2019 CCC Karl Gstettner Open	2019-07-10	2019-08-21	Standard	Tshwane (GTP)	7	7	4	Yes	Analysis
28	2019 Alekhine Open (B)	2019-08-09	2019-08-10	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
29	2019 SWVG Arnold Classic (Rapid Open)	2019-05-18	2019-05-19	Rapid	Tshwane (GTP)	10	10	5	Yes	Analysis
30	2019 SWVG Arnold Classic (Blitz Open)	2019-05-19	2019-05-19	Blitz	Tshwane (GTP)	10	10	4	Yes	Analysis
31	2019 Capablanca Chess Festival (Swiss B)	2019-04-19	2019-04-21	Standard	Tshwane (GTP)	7	7	2.5	Yes	Analysis
32	2019 TuksChess Open (B)	2019-02-23	2019-02-23	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
33	2019 Tshwane Chess Registration Tournament (B)	2019-01-26	2019-01-26	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
34	2019 Centurion Club Tournament Open	2019-01-23	2019-01-30	Standard	Tshwane (GTP)	6	5	4	Yes	Analysis
35	South African Junior Blitz 2018 (Open)	2018-12-19	2018-12-19	Blitz	4 Knights (4K)	7	7	2	Yes	Analysis
36	2018 Blou Bul Open (B)	2018-02-17	2018-02-17	Standard	Tshwane (GTP)	5	5	2.5	Yes	Analysis
37	2018 Tshwane Registration Open Chess Tournament (B)	2018-01-27	2018-01-27	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament CCC Midstream Rapid 2023				Tournament CCC Blitz All 2023
		date 2023-11-27	rnd 3	type Rapid	result 1	date 2023-12-06	rnd 3	type Blitz	result 1
		Opponent Maganti, D (Dheeraj)				Opponent Van Staden, R (Rikus)
2	5	Tournament Bojanala's FIDE In The Sparkling Waters 2024				Tournament 2024 Tshwane Chess Club Clash
		date 2024-08-18	rnd 6	type Standard	result 1	date 2024-10-12	rnd 4	type Standard	result 1
		Opponent Bokang, MNE (Motsamai Nthole Emma)				Opponent Seroadi, T (Thato)
3	4	Tournament Bojanala's FIDE In The Sparkling Waters 2024				Tournament Bojanala's FIDE In The Sparkling Waters 2024
		date 2024-08-16	rnd 1	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 1
		Opponent Jele, S (Sicelo)				Opponent De Villiers, H (Hj)

#	Games	Start				End
1	5	Tournament Bojanala's FIDE In The Sparkling Waters 2024				Tournament 2024 Tshwane Chess Club Clash
		date 2024-08-18	rnd 6	type Standard	result 1	date 2024-10-12	rnd 4	type Standard	result 1
		Opponent Bokang, MNE (Motsamai Nthole Emma)				Opponent Seroadi, T (Thato)
2	4	Tournament Bojanala's FIDE In The Sparkling Waters 2024				Tournament Bojanala's FIDE In The Sparkling Waters 2024
		date 2024-08-16	rnd 1	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 1
		Opponent Jele, S (Sicelo)				Opponent De Villiers, H (Hj)
3	4	Tournament 2020 Registration Tournament				Tournament 2020 Registration Tournament
		date 2020-01-25	rnd 1	type Standard	result 1	date 2020-01-25	rnd 4	type Standard	result 1
		Opponent Lodi, N (Neo)				Opponent Scheepers, R (Reinhardt)

#	Games	Start				End
1	3	Tournament CCC Midstream Rapid 2023				Tournament CCC Midstream Rapid 2023
		date 2023-11-27	rnd 3	type Rapid	result 1	date 2023-11-27	rnd 5	type Rapid	result 1
		Opponent Maganti, D (Dheeraj)				Opponent Muller, A (Arend)
2	2	Tournament CPH Chess Clubs Challenge 2022				Tournament CPH Chess Clubs Challenge 2022
		date 2022-11-12	rnd 5	type Rapid	result 1	date 2022-11-12	rnd 6	type Rapid	result 1
		Opponent Kangausaru, D (Donald)				Opponent Masuku, N (Nkosinathi)
3	2	Tournament CPH Chess Clubs Challenge 2022				Tournament CPH Chess Clubs Challenge 2022
		date 2022-11-12	rnd 2	type Rapid	result 1	date 2022-11-12	rnd 3	type Rapid	result 1
		Opponent Kobe, S (Sive)				Opponent Roets, M (Marlene)

#	Games	Start				End
1	4	Tournament 2024 Tshwane Chess FIDE RATED Blitz League Championship 1				Tournament CCC Blitz 2024
		date 2024-05-26	rnd 8	type Blitz	result 1	date 2024-12-04	rnd 2	type Blitz	result 1
		Opponent Kgwale, L (Lesedi)				Opponent Letsoalo, PM (Peter)
2	3	Tournament CCC Blitz All 2023				Tournament CCC Blitz All 2023
		date 2023-12-06	rnd 6	type Blitz	result 1	date 2023-12-06	rnd 8	type Blitz	result 1
		Opponent Maphalala, A (Andile)				Opponent Moultrey, V (Valentino)
3	3	Tournament CCC Blitz All 2023				Tournament CCC Blitz All 2023
		date 2023-12-06	rnd 1	type Blitz	result 1	date 2023-12-06	rnd 3	type Blitz	result 1
		Opponent Jacobs, AE (Alyssa)				Opponent Van Staden, R (Rikus)

#	Games	Start				End
1	6	Tournament CCC Midstream Rapid 2023				Tournament CCC Blitz All 2023
		date 2023-11-27	rnd 3	type Rapid	result 1	date 2023-12-06	rnd 3	type Blitz	result 1
		Opponent Maganti, D (Dheeraj)				Opponent Van Staden, R (Rikus)
2	5	Tournament Bojanala's FIDE In The Sparkling Waters 2024				Tournament 2024 Tshwane Chess Club Clash
		date 2024-08-18	rnd 6	type Standard	result 1	date 2024-10-12	rnd 4	type Standard	result 1
		Opponent Bokang, MNE (Motsamai Nthole Emma)				Opponent Seroadi, T (Thato)
3	4	Tournament Bojanala's FIDE In The Sparkling Waters 2024				Tournament Bojanala's FIDE In The Sparkling Waters 2024
		date 2024-08-16	rnd 1	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 1
		Opponent Jele, S (Sicelo)				Opponent De Villiers, H (Hj)

#	Games	Start				End
1	5	Tournament Bojanala's FIDE In The Sparkling Waters 2024				Tournament 2024 Tshwane Chess Club Clash
		date 2024-08-18	rnd 6	type Standard	result 1	date 2024-10-12	rnd 4	type Standard	result 1
		Opponent Bokang, MNE (Motsamai Nthole Emma)				Opponent Seroadi, T (Thato)
2	4	Tournament Bojanala's FIDE In The Sparkling Waters 2024				Tournament Bojanala's FIDE In The Sparkling Waters 2024
		date 2024-08-16	rnd 1	type Standard	result 1	date 2024-08-17	rnd 4	type Standard	result 1
		Opponent Jele, S (Sicelo)				Opponent De Villiers, H (Hj)
3	4	Tournament 2020 Registration Tournament				Tournament 2020 Registration Tournament
		date 2020-01-25	rnd 1	type Standard	result 1	date 2020-01-25	rnd 4	type Standard	result 1
		Opponent Lodi, N (Neo)				Opponent Scheepers, R (Reinhardt)

#	Games	Start				End
1	3	Tournament CCC Midstream Rapid 2023				Tournament CCC Midstream Rapid 2023
		date 2023-11-27	rnd 3	type Rapid	result 1	date 2023-11-27	rnd 5	type Rapid	result 1
		Opponent Maganti, D (Dheeraj)				Opponent Muller, A (Arend)
2	2	Tournament CPH Chess Clubs Challenge 2022				Tournament CPH Chess Clubs Challenge 2022
		date 2022-11-12	rnd 5	type Rapid	result 1	date 2022-11-12	rnd 6	type Rapid	result 1
		Opponent Kangausaru, D (Donald)				Opponent Masuku, N (Nkosinathi)
3	2	Tournament CPH Chess Clubs Challenge 2022				Tournament CPH Chess Clubs Challenge 2022
		date 2022-11-12	rnd 2	type Rapid	result 1	date 2022-11-12	rnd 3	type Rapid	result 1
		Opponent Kobe, S (Sive)				Opponent Roets, M (Marlene)

#	Games	Start				End
1	4	Tournament 2024 Tshwane Chess FIDE RATED Blitz League Championship 1				Tournament CCC Blitz 2024
		date 2024-05-26	rnd 8	type Blitz	result 1	date 2024-12-04	rnd 2	type Blitz	result 1
		Opponent Kgwale, L (Lesedi)				Opponent Letsoalo, PM (Peter)
2	3	Tournament CCC Blitz All 2023				Tournament CCC Blitz All 2023
		date 2023-12-06	rnd 6	type Blitz	result 1	date 2023-12-06	rnd 8	type Blitz	result 1
		Opponent Maphalala, A (Andile)				Opponent Moultrey, V (Valentino)
3	3	Tournament CCC Blitz All 2023				Tournament CCC Blitz All 2023
		date 2023-12-06	rnd 1	type Blitz	result 1	date 2023-12-06	rnd 3	type Blitz	result 1
		Opponent Jacobs, AE (Alyssa)				Opponent Van Staden, R (Rikus)

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	Schutte ,R (Rico)	6	1	-283.3	2	0	-425	0	0	0	4	1	-212.5
1	Schutte ,R (Rico)	6	1583.4	1300	2	1598.4	1158.4	0	0	0	4	1535.7	1370.9
2	Pillay ,N (Nico)	5	1	-255	1	0	-425	0	0	0	4	1	-212.5
2	Pillay ,N (Nico)	5	1418.2	1163.2	1	1345.6	993.2	0	0	0	4	1393.7	1205.7
3	Letsoalo ,PM (Peter Mogatli)	4	1	-212.5	2	0	-425	1	0	-425	1	1	425
3	Letsoalo ,PM (Peter Mogatli)	4	1671.4	1458.9	2	1681.4	1246.4	1	1698.2	1246.4	1	1577.3	2096.4
4	Jacobs ,CN (Calvin Nicholas)	4	0	-425	1	0	-425	0	0	0	3	0	-425
4	Jacobs ,CN (Calvin Nicholas)	4	1651.8	1226.8	1	1384.8	1226.8	0	0	0	3	1528	1226.8
5	Nieuwoudt ,H (Hanno)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
5	Nieuwoudt ,H (Hanno)	3	1452	1310.3	3	1453.4	1310.3	0	0	0	0	0	0
6	Van Rensburg ,B (Ben)	3	3	425	3	3	425	0	0	0	0	0	0
6	Van Rensburg ,B (Ben)	3	1266.9	1691.9	3	1260.5	1691.9	0	0	0	0	0	0
7	Pretorius ,F (Frik)	3	2	141.7	2	1	0	0	0	0	1	1	425
7	Pretorius ,F (Frik)	3	1250.9	1392.6	2	1257.6	1250.9	0	0	0	1	1200	1675.9
8	Pape ,Z (Zane)	3	1	-141.7	1	0	-425	0	0	0	2	1	0
8	Pape ,Z (Zane)	3	1514.6	1372.9	1	1507.7	1089.6	0	0	0	2	1419.6	1514.6
9	Malan ,A (Aiden)	3	1	-141.7	1	1	425	0	0	0	2	0	-425
9	Malan ,A (Aiden)	3	1393.2	1251.6	1	1340.7	1818.2	0	0	0	2	1175.6	968.2
10	Snyders ,M (Meya)	3	1	-141.7	1	1	425	0	0	0	2	0	-425
10	Snyders ,M (Meya)	3	1433.8	1292.1	1	1383.4	1858.8	0	0	0	2	1219.1	1008.8

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Jacobs, GJ (Gerhard Jakobus)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms