Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jacobs, I (Ian)

Chess SA id

1120302570

FIDE id

Date of birth

2012-05-16 (U14)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1171.3	1166.1	1194.5	1200
Raw rating	1144.2	1151.8	1164.6	1200
Weighted rating	1171.3	1166.1	1194.5	1200
Weighted performance	0	0	0	0
Floor	700	700	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	179.5	177.6	174.4	165.8
Highest rating	1200 2024-04-01	1200 2024-04-01	1200 2024-05-01	1200 2024-05-01
Highest raw rating	1200 2024-04-01	1200 2024-04-01	1200 2024-05-01	1200 2024-05-01
Highest weighted rating	1200 2024-04-01	1200 2024-04-01	1200 2024-05-01	1200 2024-05-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1200 2024-05-01	1200 2024-05-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-2.6	-1.6	-2.6	0
New rating	1168.6	1164.5	1191.9	1200
Analysis
Rating	1171.3	1166.1	1194.5	1200
Raw rating	1144.2	1151.8	1164.6	1200
Weighted rating	1171.3	1166.1	1194.5
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	700	700	700	700
Max/Min rating change allowed	179.5	177.6	174.4	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	1144.2	1151.8	1164.6	1200
New weighted rating	1168.6	1164.5	1191.9	1200
New weighted performance	0	0	0	0
Temp new rating	1168.6	1164.5	1191.9	1200
Temp new rating +/-	-2.6	-1.6	-2.6	0
Final new rating +/-	-2.6	-1.6	-2.6	0
New rating	1168.6	1164.5	1191.9	1200
New K-factor	36	36	36	36
New floor	700	700	700	700

Item	Main	Standard	Rapid
	0	0	0
	10	5	5
	5	5	0
	0	0	0
	0	0	0
	0	0	0
History	15	10	5

Games since
	Main 15	Standard 10		Rapid 5		Blitz 0
Gender	Male
Age group	U14
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	3	30	-170	1223.1	1053.1
Standard	5	1.5	30	-170	1251.1	1081.1
Rapid	5	1.5	30	-170	1195.1	1025.1
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	15	4.5	30	-170	1218.7	1048.7
Standard	10	3	30	-170	1230.4	1060.4
Rapid	5	1.5	30	-170	1195.1	1025.1
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1144.2	1151.8	1164.6	1200
2025-09-01	1144.2	1151.8	1164.6	1200
2025-08-01	1179.1	1172.5	1200	1200
2025-07-01	1179.1	1172.5	1200	1200
2025-06-01	1179.1	1172.5	1200	1200
2025-05-01	1179.1	1172.5	1200	1200
2025-04-01	1179.1	1172.5	1200	1200
2025-03-01	1179.1	1172.5	1200	1200
2025-02-01	1178.9	1172.2	1200	1200
2025-01-01	1167.5	1157.2	1200	1200
2024-12-01	1167.5	1157.2	1200	1200
2024-11-01	1167.5	1157.2	1200	1200
2024-10-01	1167.5	1157.2	1200	1200
2024-09-01	1167.5	1157.2	1200	1200
2024-08-01	1167.5	1157.2	1200	1200
2024-07-01	1167.5	1157.2	1200	1200
2024-06-01	1167.5	1157.2	1200	1200
2024-08-01	1167.5	1157.2	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	1200
2023-11-01	1200	1200	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	Ekurhuleni North Schools Teams 2025 (U13 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
2	Kempton Park Team Clusters LS 2025 (U13)	2025-07-26	2025-07-26	Rapid	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Ekurhuleni North Schools Teams 2025 (U13 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
2	Kempton Park Team Clusters LS 2025 (U13)	2025-07-26	2025-07-26	Rapid	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
3	Ekurhuleni Open 2024 (E)	2024-04-06	2024-04-06	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis

#	Games	Start				End
1	2	Tournament Kempton Park Team Clusters LS 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-07-26	rnd 5	type Rapid	result 0.5	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Kelebongile, L (Lesego)				Opponent Nqcobo, P (Phendulo)
2	1	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 4	type Standard	result 0.5	date 2025-08-16	rnd 4	type Standard	result 0.5
		Opponent Mashiyane, S (Sinethemba)				Opponent Mashiyane, S (Sinethemba)
3	1	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 2	type Rapid	result 1	date 2025-07-26	rnd 2	type Rapid	result 1
		Opponent Venter, I (Ilse)				Opponent Venter, I (Ilse)

#	Games	Start				End
1	2	Tournament Ekurhuleni Open 2024				Tournament Ekurhuleni North Schools Teams 2025
		date 2024-04-06	rnd 5	type Standard	result 0.5	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Siwela, A (Achim)				Opponent Nqcobo, P (Phendulo)
2	1	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 4	type Standard	result 0.5	date 2025-08-16	rnd 4	type Standard	result 0.5
		Opponent Mashiyane, S (Sinethemba)				Opponent Mashiyane, S (Sinethemba)
3	1	Tournament Ekurhuleni Open 2024				Tournament Ekurhuleni Open 2024
		date 2024-04-06	rnd 2	type Standard	result 1	date 2024-04-06	rnd 2	type Standard	result 1
		Opponent Van Rensburg, J (Janru)				Opponent Van Rensburg, J (Janru)

#	Games	Start				End
1	1	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 5	type Rapid	result 0.5	date 2025-07-26	rnd 5	type Rapid	result 0.5
		Opponent Kelebongile, L (Lesego)				Opponent Kelebongile, L (Lesego)
2	1	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 2	type Rapid	result 1	date 2025-07-26	rnd 2	type Rapid	result 1
		Opponent Venter, I (Ilse)				Opponent Venter, I (Ilse)

No games found.

#	Games	Start				End

#	Games	Start				End
1	1	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 1	type Standard	result 1	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Nqcobo, P (Phendulo)				Opponent Nqcobo, P (Phendulo)
2	1	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 2	type Rapid	result 1	date 2025-07-26	rnd 2	type Rapid	result 1
		Opponent Venter, I (Ilse)				Opponent Venter, I (Ilse)
3	1	Tournament Ekurhuleni Open 2024				Tournament Ekurhuleni Open 2024
		date 2024-04-06	rnd 2	type Standard	result 1	date 2024-04-06	rnd 2	type Standard	result 1
		Opponent Van Rensburg, J (Janru)				Opponent Van Rensburg, J (Janru)

#	Games	Start				End
1	1	Tournament Ekurhuleni North Schools Teams 2025				Tournament Ekurhuleni North Schools Teams 2025
		date 2025-08-16	rnd 1	type Standard	result 1	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Nqcobo, P (Phendulo)				Opponent Nqcobo, P (Phendulo)
2	1	Tournament Ekurhuleni Open 2024				Tournament Ekurhuleni Open 2024
		date 2024-04-06	rnd 2	type Standard	result 1	date 2024-04-06	rnd 2	type Standard	result 1
		Opponent Van Rensburg, J (Janru)				Opponent Van Rensburg, J (Janru)

#	Games	Start				End
1	1	Tournament Kempton Park Team Clusters LS 2025				Tournament Kempton Park Team Clusters LS 2025
		date 2025-07-26	rnd 2	type Rapid	result 1	date 2025-07-26	rnd 2	type Rapid	result 1
		Opponent Venter, I (Ilse)				Opponent Venter, I (Ilse)

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	Terwin ,J (Jordin)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Terwin ,J (Jordin)	1	1334.6	909.6	1	1326.1	909.6	0	0	0	0	0	0
2	Rugunanan ,Y (Yashika)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Rugunanan ,Y (Yashika)	1	1200	775	1	1200	775	0	0	0	0	0	0
3	Van Rensburg ,J (Janru)	1	1	425	1	1	425	0	0	0	0	0	0
3	Van Rensburg ,J (Janru)	1	1272.1	1697.1	1	1198.9	1697.1	0	0	0	0	0	0
4	Bosman ,J (Johan)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Bosman ,J (Johan)	1	1321.5	896.5	1	1265.7	896.5	0	0	0	0	0	0
5	Vermaak ,S (Sebastian)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Vermaak ,S (Sebastian)	1	1257.6	832.6	1	1266.4	832.6	0	0	0	0	0	0
6	Benjamin ,L (Liyabona)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Benjamin ,L (Liyabona)	1	1156.9	731.9	1	1134.8	731.9	0	0	0	0	0	0
7	Mashiyane ,S (Sinethemba)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
7	Mashiyane ,S (Sinethemba)	1	1199.4	1199.4	1	1199.3	1199.4	0	0	0	0	0	0
8	Steyn ,K (Kahn)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Steyn ,K (Kahn)	1	1162.5	737.5	1	1163.3	737.5	0	0	0	0	0	0
9	Siwela ,A (Achim)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
9	Siwela ,A (Achim)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
10	Nqcobo ,P (Phendulo)	1	1	425	1	1	425	0	0	0	0	0	0
10	Nqcobo ,P (Phendulo)	1	1200	1625	1	1200	1625	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Jacobs, I (Ian)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms