Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jacob, AK (Abishai Korah)

Chess SA id

1090136702

FIDE id

Date of birth

2009-11-22 (U18)

Gender

Male

Region

West Rand (GWR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-06-09

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1229

Item	Main	Standard	Rapid	Blitz
Rating	1254	1256.3	1200	1200
Raw rating	1254	1256.3	1200	1200
Weighted rating	1243.7	1244.7	1200	1200
Weighted performance	1143	1145	0	0
Floor	765.7	772.1	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	153.5	153	165.8	165.8
Highest rating	1302.4 2023-05-01	1300.8 2023-05-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1265.7 2025-06-01	1272.1 2025-06-01	1200 2024-02-01	1200 2024-02-01
Highest weighted rating	1240 2025-08-01	1240.4 2025-08-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1302.4 2023-05-01	1300.8 2023-05-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1254	1256.3	1200	1200
Analysis
Rating	1254	1256.3	1200	1200
Raw rating	1254	1256.3	1200	1200
Weighted rating	1243.7	1244.7	1200
Weighted performance	1143	1145	0
K-factor	36	36	36	36
Floor	765.7	772.1	700	700
Max/Min rating change allowed	153.5	153	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	1254	1256.3	1200	1200
New weighted rating	1245.3	1246.6	1200	1200
New weighted performance	1142.6	1144.6	0	0
Temp new rating	1254	1256.3	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1254	1256.3	1200	1200
New K-factor	36	36	36	36
New floor	765.7	772.1	700	700

Item	Main	Standard
	0	0
	8	8
	51	51
	22	22
	24	24
	0	0
History	105	105

Games since
	Main 59	Standard 59		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	West Rand (GWR)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	3595		1169		101
Male	2770		909		76
U18	542		186		21
U18 Male	443		151		18
Standard
	RSA		Province		Region
Overall	3456		1225		125
Male	2665		954		93
U18	552		203		25
U18 Male	458		168		20
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	8	4	50	0	1319.6	1319.6
Standard	8	4	50	0	1319.6	1319.6
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	105	43.5	41.43	-72.9	1258.8	1185.9
Standard	105	43.5	41.43	-72.9	1258.8	1185.9
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1254	1256.3	1200	1200
2025-09-01	1254	1256.3	1200	1200
2025-08-01	1254	1256.3	1200	1200
2025-07-01	1254	1256.3	1200	1200
2025-06-01	1265.7	1272.1	1200	1200
2025-05-01	1233.4	1232.4	1200	1200
2025-04-01	1233.1	1232	1200	1200
2025-03-01	1232.4	1231.2	1200	1200
2025-02-01	1230.5	1229.3	1200	1200
2025-01-01	1218.1	1218.2	1200	1200
2024-12-01	1253.3	1254.2	1200	1200
2024-11-01	1253.3	1254.2	1200	1200
2024-10-01	1262.9	1267.2	1200	1200
2024-09-01	1248	1251	1200	1200
2024-08-01	1248	1251	1200	1200
2024-07-01	1255.2	1261.1	1200	1200
2024-06-01	1255.2	1261.1	1200	1200
2024-08-01	1236.1	1237.3	1200	1200
2024-04-01	1222.7	1218.6	1200	1200
2024-03-01	1188.3	1179	1200	1200
2024-02-01	1192.2	1180.4	1200	1200
2024-01-01	1192.2	1180.4	1200	1200
2023-12-01	1192.2	1180.4	1200	1200
2023-11-01	1192.2	1180.4	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	JCC Steyn City High Schools League 2025 (A)	2025-05-07	2025-06-09	Standard	Johannesburg Metro (GJM)	6	3	1	Yes	Analysis
2	2025 D2 Schools Individuals (U18 Open)	2025-05-10	2025-05-10	Standard	West Rand (GWR)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	JCC Steyn City High Schools League 2025 (A)	2025-05-07	2025-06-09	Standard	Johannesburg Metro (GJM)	6	3	1	Yes	Analysis
2	2025 D2 Schools Individuals (U18 Open)	2025-05-10	2025-05-10	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
3	Gauteng Inter-Region at UJ 2024 (U16 Candidates)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
4	2024 West Rand Closed (U16)	2024-10-12	2024-10-12	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
5	2024 West Rand Trials (U16)	2024-09-07	2024-09-07	Standard	West Rand (GWR)	5	5	2.5	Yes	Analysis
6	D2 School League Finals 2024 (U19)	2024-07-20	2024-07-20	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
7	2024 D2 Schools Individuals (U15 Boys)	2024-05-04	2024-05-04	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
8	2024 West Rand RHS Open (Rooks)	2024-04-13	2024-04-13	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
9	Dainfern College Chess League 2024 (A)	2024-01-29	2024-03-11	Standard	Johannesburg Metro (GJM)	6	6	3	Yes	Analysis
10	1st Knights Open Tournament 2024 (C)	2024-03-23	2024-03-23	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
11	2024 West Rand Juniors (U16)	2024-03-09	2024-03-09	Standard	West Rand (GWR)	5	5	3	Yes	Analysis
12	2024 West Rand Open (Rooks)	2024-02-03	2024-02-03	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
13	St Peters College Chess League 2023 (A)	2023-09-11	2023-10-23	Standard	Johannesburg Metro (GJM)	6	4	1	Yes	Analysis
14	2023 West Rand Trials (U16)	2023-09-09	2023-09-09	Standard	West Rand (GWR)	5	4	1	Yes	Analysis
15	D2 Schools Individuals 2023 (U15 Boys)	2023-05-13	2023-05-13	Standard	West Rand (GWR)	5	4	2	Yes	Analysis
16	Steyn City School Chess League 2023 (A)	2023-05-05	2023-05-29	Standard	Johannesburg Metro (GJM)	6	2	1	Yes	Analysis
17	Steyn City School Chess League 2023 (B)	2023-05-05	2023-05-29	Standard	Johannesburg Metro (GJM)	6	3	3	Yes	Analysis
18	West Rand Juniors 2023 (U16)	2023-03-18	2023-03-18	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
19	West Rand Trials 2022 (U14)	2022-09-03	2022-09-03	Standard	West Rand (GWR)	5	4	0	Yes	Analysis
20	2nd West Rand Open 2022 (Juniors)	2022-08-06	2022-08-06	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
21	D2 Schools Individuals 2022 (U13 Boys)	2022-05-07	2022-05-07	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
22	West Rand Juniors 2022 (U14)	2022-04-09	2022-04-09	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
23	West Rand Open 2022 (U14)	2022-02-05	2022-02-05	Standard	West Rand (GWR)	5	5	1	Yes	Analysis

#	Games	Start				End
1	3	Tournament 1st Knights Open Tournament 2024				Tournament 2024 West Rand RHS Open
		date 2024-03-23	rnd 4	type Standard	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Sechaba, A (Abongile)				Opponent Van Staden, J (Jenna)
2	3	Tournament D2 Schools Individuals 2023				Tournament Steyn City School Chess League 2023
		date 2023-05-13	rnd 4	type Standard	result 1	date 2023-05-29	rnd 6	type Standard	result 1
		Opponent Tshwagong, K (Khumo)				Opponent Lekganyane, M (Makgoba)
3	2	Tournament 2025 D2 Schools Individuals				Tournament 2025 D2 Schools Individuals
		date 2025-05-10	rnd 4	type Standard	result 1	date 2025-05-10	rnd 5	type Standard	result 1
		Opponent Mpanjukelwa, L (Luthando)				Opponent Tefu, T (Tshegofatso Knowledge)

#	Games	Start				End
1	3	Tournament 1st Knights Open Tournament 2024				Tournament 2024 West Rand RHS Open
		date 2024-03-23	rnd 4	type Standard	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Sechaba, A (Abongile)				Opponent Van Staden, J (Jenna)
2	3	Tournament D2 Schools Individuals 2023				Tournament Steyn City School Chess League 2023
		date 2023-05-13	rnd 4	type Standard	result 1	date 2023-05-29	rnd 6	type Standard	result 1
		Opponent Tshwagong, K (Khumo)				Opponent Lekganyane, M (Makgoba)
3	2	Tournament 2025 D2 Schools Individuals				Tournament 2025 D2 Schools Individuals
		date 2025-05-10	rnd 4	type Standard	result 1	date 2025-05-10	rnd 5	type Standard	result 1
		Opponent Mpanjukelwa, L (Luthando)				Opponent Tefu, T (Tshegofatso Knowledge)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament 1st Knights Open Tournament 2024				Tournament 2024 West Rand RHS Open
		date 2024-03-23	rnd 4	type Standard	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Sechaba, A (Abongile)				Opponent Van Staden, J (Jenna)
2	3	Tournament D2 Schools Individuals 2023				Tournament Steyn City School Chess League 2023
		date 2023-05-13	rnd 4	type Standard	result 1	date 2023-05-29	rnd 6	type Standard	result 1
		Opponent Tshwagong, K (Khumo)				Opponent Lekganyane, M (Makgoba)
3	2	Tournament 2025 D2 Schools Individuals				Tournament 2025 D2 Schools Individuals
		date 2025-05-10	rnd 4	type Standard	result 1	date 2025-05-10	rnd 5	type Standard	result 1
		Opponent Mpanjukelwa, L (Luthando)				Opponent Tefu, T (Tshegofatso Knowledge)

#	Games	Start				End
1	3	Tournament 1st Knights Open Tournament 2024				Tournament 2024 West Rand RHS Open
		date 2024-03-23	rnd 4	type Standard	result 1	date 2024-04-13	rnd 1	type Standard	result 1
		Opponent Sechaba, A (Abongile)				Opponent Van Staden, J (Jenna)
2	3	Tournament D2 Schools Individuals 2023				Tournament Steyn City School Chess League 2023
		date 2023-05-13	rnd 4	type Standard	result 1	date 2023-05-29	rnd 6	type Standard	result 1
		Opponent Tshwagong, K (Khumo)				Opponent Lekganyane, M (Makgoba)
3	2	Tournament 2025 D2 Schools Individuals				Tournament 2025 D2 Schools Individuals
		date 2025-05-10	rnd 4	type Standard	result 1	date 2025-05-10	rnd 5	type Standard	result 1
		Opponent Mpanjukelwa, L (Luthando)				Opponent Tefu, T (Tshegofatso Knowledge)

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	Udodi ,E (Edubechukwu)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
1	Udodi ,E (Edubechukwu)	3	1473.6	1331.9	3	1441.7	1331.9	0	0	0	0	0	0
2	Mbasane ,D (David)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Mbasane ,D (David)	2	1227.3	802.3	2	1220.3	802.3	0	0	0	0	0	0
3	Badenhorst ,JJ (Junaid Jaydon)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Badenhorst ,JJ (Junaid Jaydon)	2	1444.8	1019.8	2	1465.9	1019.8	0	0	0	0	0	0
4	Myburgh ,J (Joshua)	2	1	0	2	1	0	0	0	0	0	0	0
4	Myburgh ,J (Joshua)	2	1191.9	1191.9	2	1189.9	1191.9	0	0	0	0	0	0
5	Sibanda ,M (Marlvin)	2	0	-425	2	0	-425	0	0	0	0	0	0
5	Sibanda ,M (Marlvin)	2	1257.6	832.6	2	1270.3	832.6	0	0	0	0	0	0
6	Van Heerden ,A (Alexander)	2	1	0	2	1	0	0	0	0	0	0	0
6	Van Heerden ,A (Alexander)	2	1265.3	1265.3	2	1281.7	1265.3	0	0	0	0	0	0
7	Sardinha ,K (Keanu)	2	1	0	2	1	0	0	0	0	0	0	0
7	Sardinha ,K (Keanu)	2	1176.8	1176.8	2	1172.2	1176.8	0	0	0	0	0	0
8	Klaas ,O (Oyintanda)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Klaas ,O (Oyintanda)	2	1312.7	887.7	2	1304.9	887.7	0	0	0	0	0	0
9	Mediwane ,R (Rethabile)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Mediwane ,R (Rethabile)	1	1385	960	1	1384.1	960	0	0	0	0	0	0
10	Lokwe ,S (Simthandile)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Lokwe ,S (Simthandile)	1	1413.4	988.4	1	1418.8	988.4	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

Jacob, AK (Abishai Korah)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms