Chess South Africa Ratings Database

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Personal

Robinson, Z (Zachariah)

Chess SA id

1150147324

FIDE id

Date of birth

2015-07-30 (U12)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-04-19

Personal details last changed

1900-01-01

Junior GPX Games

16.5

Junior GPX Points

1316.9

Item	Main	Standard	Rapid	Blitz
Rating	1364.7	1394	1288	1200
Raw rating	1364.7	1394	1288	1200
Weighted rating	1323.8	1314.9	1287.1	1200
Weighted performance	1231.5	1303.4	1019.9	0
Floor	894.7	894	822.8	700
K-factor	36	36	36	36
Min/Max rating change allowed	131.1	125.8	146.3	165.8
Highest rating	1394.7 2025-04-01	1394 2025-04-01	1322.8 2024-02-01	1200 2018-10-01
Highest raw rating	1394.7 2025-04-01	1394 2025-04-01	1322.8 2024-02-01	1200 2024-02-01
Highest weighted rating	1311.2 2025-08-01	1394 2023-04-01	1322.8 2025-04-01	1200 2018-10-01
Highest weighted performance	1394.7 2025-04-01	1394 2025-01-01	1321.3 2023-06-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1364.7	1394	1288	1200
Analysis
Rating	1364.7	1394	1288	1200
Raw rating	1364.7	1394	1288	1200
Weighted rating	1323.8	1314.9	1287.1
Weighted performance	1231.5	1303.4	1019.9
K-factor	36	36	36	36
Floor	894.7	894	822.8	700
Max/Min rating change allowed	131.1	125.8	146.3	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	1364.7	1394	1288	1200
New weighted rating	1329.4	1326.1	1286.8	1200
New weighted performance	1231.1	1302.9	1019.5	0
Temp new rating	1364.7	1394	1288	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1364.7	1394	1288	1200
New K-factor	36	36	36	36
New floor	894.7	894	822.8	700

Item	Main	Standard	Rapid
	0	0	0
	10	5	5
	33	28	5
	39	19	20
	4	0	4
	0	0	0
History	86	52	34

Games since
	Main 48	Standard 33		Rapid 15		Blitz 0
Gender	Male
Age group	U12
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	2517		861		261
Male	2048		703		217
U12	355		120		32
U12 Male	264		88		27
Standard
	RSA		Province		Region
Overall	2119		790		237
Male	1734		641		195
U12	278		105		31
U12 Male	203		74		26
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 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	6	60	85	1249.4	1334.4
Standard	5	4	80	255	1247.8	1502.8
Rapid	5	2	40	-85	1251	1166
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	86	46	53.49	29.7	1230.5	1260.2
Standard	52	27	51.92	16.3	1230.9	1247.2
Rapid	34	19	55.88	50	1230	1280
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1364.7	1394	1288	1200
2025-09-01	1364.7	1394	1288	1200
2025-08-01	1364.7	1394	1288	1200
2025-07-01	1364.7	1394	1288	1200
2025-06-01	1364.7	1394	1288	1200
2025-05-01	1364.7	1394	1285.5	1200
2025-04-01	1394.7	1394	1288.3	1200
2025-03-01	1351.1	1349.7	1287.6	1200
2025-02-01	1351.1	1349.7	1286.2	1200
2025-01-01	1351.1	1349.7	1279.2	1200
2024-12-01	1305.1	1309.2	1279.2	1200
2024-11-01	1305.1	1309.2	1279.2	1200
2024-10-01	1248.8	1199.9	1279.2	1200
2024-09-01	1222.2	1157.4	1279.2	1200
2024-08-01	1222.2	1157.4	1279.2	1200
2024-07-01	1202.2	1116	1279.2	1200
2024-06-01	1202.2	1116	1279.2	1200
2024-08-01	1202.2	1116	1279.2	1200
2024-04-01	1254.9	1143.7	1322.8	1200
2024-03-01	1254.9	1143.7	1322.8	1200
2024-02-01	1254.9	1143.7	1322.8	1200
2024-01-01	1265.1	1132.2	1322.8	1200
2023-12-01	1265.1	1132.2	1322.8	1200
2023-11-01	1230.5	1132.2	1283.6	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 School District Finals 2025 (U11 Boys)	2025-06-14	2025-06-14	Standard	Ekurhuleni (GE)	5	0	0	No	Analysis
2	Chess Molecules Open Tournament 2025 (D)	2025-04-19	2025-04-19	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	Edenvale Germiston Cluster 2025 (U11 Boys)	2025-03-08	2025-03-08	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Ekurhuleni North School District Finals 2025 (U11 Boys)	2025-06-14	2025-06-14	Standard	Ekurhuleni (GE)	5	0	0	No	Analysis
2	Chess Molecules Open Tournament 2025 (D)	2025-04-19	2025-04-19	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	Edenvale Germiston Cluster 2025 (U11 Boys)	2025-03-08	2025-03-08	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
4	Gauteng Inter-Region at UJ 2024 (U10 Open)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
5	Gauteng Top Schools 2024 (U9 Open)	2024-10-04	2024-10-04	Standard	Ekurhuleni (GE)	5	4	3	Yes	Analysis
6	Ekurhuleni Trails 3 2024 (U8+U10)	2024-08-24	2024-08-24	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
7	Ekurhuleni Trails 2 2024 (U8+U10)	2024-07-27	2024-07-27	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
8	JCC King David Linksfield Rapid 2024 (C)	2024-04-21	2024-04-21	Rapid	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
9	Ekurhuleni Open 2024 (D)	2024-04-06	2024-04-06	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
10	2024 Gauteng Inter-Region Chess Championship (U10B)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	4	2	Yes	Analysis
11	Chess is My Lifestyle 2023 (Grade 0-2)	2023-12-09	2023-12-09	Rapid	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
12	Primrose Rapid 2023 (Grade 0-2)	2023-06-10	2023-06-10	Rapid	Ekurhuleni (GE)	6	6	4.5	Yes	Analysis
13	Chess Molecules 16 June Tournament 2023 (Grade 0-2)	2023-06-16	2023-06-16	Rapid	Ekurhuleni (GE)	5	4	3	Yes	Analysis
14	Ekurhuleni Chess Trial 3 2023 (U10)	2023-06-17	2023-06-17	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
15	Ithembelihle Open 2023 (B)	2023-05-13	2023-05-13	Rapid	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
16	Ekurhuleni Trials 2 2023 (U10)	2023-04-22	2023-04-22	Standard	Ekurhuleni (GE)	5	4	0	Yes	Analysis
17	Ekhuruleni Chess Trials 1 2023 (U8+U10)	2023-03-25	2023-03-25	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
18	Ekurhuleni Springs Open 4 March 2023 (E)	2023-03-04	2023-03-04	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
19	Chess Power House Rapid 2022 (U8)	2022-10-22	2022-10-22	Rapid	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis

#	Games	Start				End
1	6	Tournament Primrose Rapid 2023				Tournament Chess Molecules 16 June Tournament 2023
		date 2023-06-10	rnd 2	type Rapid	result 0.5	date 2023-06-16	rnd 2	type Rapid	result 1
		Opponent Mafane, A (Atlegang)				Opponent Wong, K (Kayla)
2	5	Tournament Gauteng Top Schools 2024				Tournament Gauteng Inter-Region at UJ 2024
		date 2024-10-04	rnd 2	type Standard	result 1	date 2024-12-07	rnd 2	type Standard	result 1
		Opponent Moyo, D (Delrick)				Opponent Ninham, G (Grant)
3	4	Tournament Gauteng Inter-Region at UJ 2024				Tournament Edenvale Germiston Cluster 2025
		date 2024-12-08	rnd 5	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Radebe, L (Lethabo)				Opponent Shai, K (Keatlegile)

#	Games	Start				End
1	5	Tournament Gauteng Top Schools 2024				Tournament Gauteng Inter-Region at UJ 2024
		date 2024-10-04	rnd 2	type Standard	result 1	date 2024-12-07	rnd 2	type Standard	result 1
		Opponent Moyo, D (Delrick)				Opponent Ninham, G (Grant)
2	4	Tournament Gauteng Inter-Region at UJ 2024				Tournament Edenvale Germiston Cluster 2025
		date 2024-12-08	rnd 5	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Radebe, L (Lethabo)				Opponent Shai, K (Keatlegile)
3	3	Tournament Ekurhuleni Trails 3 2024				Tournament Ekurhuleni Trails 3 2024
		date 2024-08-24	rnd 1	type Standard	result 1	date 2024-08-24	rnd 3	type Standard	result 1
		Opponent Nengovhela, N (Nnduvho)				Opponent Moutafis, A (Andoni)

#	Games	Start				End
1	6	Tournament Primrose Rapid 2023				Tournament Chess Molecules 16 June Tournament 2023
		date 2023-06-10	rnd 2	type Rapid	result 0.5	date 2023-06-16	rnd 2	type Rapid	result 1
		Opponent Mafane, A (Atlegang)				Opponent Wong, K (Kayla)
2	5	Tournament Chess Molecules 16 June Tournament 2023				Tournament Chess is My Lifestyle 2023
		date 2023-06-16	rnd 4	type Rapid	result 1	date 2023-12-09	rnd 3	type Rapid	result 1
		Opponent Nahon, J (James)				Opponent Pather, T (Tamishka)
3	2	Tournament Chess Molecules Open Tournament 2025				Tournament Chess Molecules Open Tournament 2025
		date 2025-04-19	rnd 4	type Rapid	result 1	date 2025-04-19	rnd 5	type Rapid	result 1
		Opponent Nathoo, T (Tanvir)				Opponent Rodda, T (Tirza)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Gauteng Top Schools 2024				Tournament Gauteng Inter-Region at UJ 2024
		date 2024-10-04	rnd 2	type Standard	result 1	date 2024-12-07	rnd 2	type Standard	result 1
		Opponent Moyo, D (Delrick)				Opponent Ninham, G (Grant)
2	5	Tournament Primrose Rapid 2023				Tournament Chess Molecules 16 June Tournament 2023
		date 2023-06-10	rnd 3	type Rapid	result 1	date 2023-06-16	rnd 2	type Rapid	result 1
		Opponent Kruger, T (Thinus Pieter)				Opponent Wong, K (Kayla)
3	4	Tournament Gauteng Inter-Region at UJ 2024				Tournament Edenvale Germiston Cluster 2025
		date 2024-12-08	rnd 5	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Radebe, L (Lethabo)				Opponent Shai, K (Keatlegile)

#	Games	Start				End
1	5	Tournament Gauteng Top Schools 2024				Tournament Gauteng Inter-Region at UJ 2024
		date 2024-10-04	rnd 2	type Standard	result 1	date 2024-12-07	rnd 2	type Standard	result 1
		Opponent Moyo, D (Delrick)				Opponent Ninham, G (Grant)
2	4	Tournament Gauteng Inter-Region at UJ 2024				Tournament Edenvale Germiston Cluster 2025
		date 2024-12-08	rnd 5	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Radebe, L (Lethabo)				Opponent Shai, K (Keatlegile)
3	3	Tournament Ekurhuleni Trails 3 2024				Tournament Ekurhuleni Trails 3 2024
		date 2024-08-24	rnd 1	type Standard	result 1	date 2024-08-24	rnd 3	type Standard	result 1
		Opponent Nengovhela, N (Nnduvho)				Opponent Moutafis, A (Andoni)

#	Games	Start				End
1	5	Tournament Chess Molecules 16 June Tournament 2023				Tournament Chess is My Lifestyle 2023
		date 2023-06-16	rnd 4	type Rapid	result 1	date 2023-12-09	rnd 3	type Rapid	result 1
		Opponent Nahon, J (James)				Opponent Pather, T (Tamishka)
2	5	Tournament Primrose Rapid 2023				Tournament Chess Molecules 16 June Tournament 2023
		date 2023-06-10	rnd 3	type Rapid	result 1	date 2023-06-16	rnd 2	type Rapid	result 1
		Opponent Kruger, T (Thinus Pieter)				Opponent Wong, K (Kayla)
3	2	Tournament Chess Molecules Open Tournament 2025				Tournament Chess Molecules Open Tournament 2025
		date 2025-04-19	rnd 4	type Rapid	result 1	date 2025-04-19	rnd 5	type Rapid	result 1
		Opponent Nathoo, T (Tanvir)				Opponent Rodda, T (Tirza)

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	Mafane ,A (Atlegang)	4	0.5	-318.8	2	0	-425	2	0.5	-212.5	0	0	0
1	Mafane ,A (Atlegang)	4	1241.7	922.9	2	1214.2	816.7	2	1200	1029.2	0	0	0
2	Mosala ,A (Atlehang)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Mosala ,A (Atlehang)	2	1272.2	847.2	2	1262.1	847.2	0	0	0	0	0	0
3	Pieterse ,F (Fourie)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Pieterse ,F (Fourie)	2	1392.2	967.2	2	1381.8	967.2	0	0	0	0	0	0
4	Moutafis ,A (Andoni)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
4	Moutafis ,A (Andoni)	2	1226.8	1439.3	2	1221.1	1439.3	0	0	0	0	0	0
5	Van Wyk ,P (Paul)	2	1	0	2	1	0	0	0	0	0	0	0
5	Van Wyk ,P (Paul)	2	1222.4	1222.4	2	1227.4	1222.4	0	0	0	0	0	0
6	Zhu ,R (Ryan Yuancheng)	2	1	0	1	0	-425	1	1	425	0	0	0
6	Zhu ,R (Ryan Yuancheng)	2	1338.6	1338.6	1	1260	913.6	1	1267.6	1763.6	0	0	0
7	Steyn ,K (Kahn)	2	0	-425	1	0	-425	1	0	-425	0	0	0
7	Steyn ,K (Kahn)	2	1363.5	938.5	1	1359.3	938.5	1	1143.5	938.5	0	0	0
8	Pather ,T (Tamishka)	2	2	425	1	1	425	1	1	425	0	0	0
8	Pather ,T (Tamishka)	2	1176.2	1601.2	1	1200	1601.2	1	1145.8	1601.2	0	0	0
9	Kruger ,T (Thinus Pieter)	2	2	425	0	0	0	2	2	425	0	0	0
9	Kruger ,T (Thinus Pieter)	2	1566.2	1991.2	0	0	0	2	1200	1991.2	0	0	0
10	Wong ,K (Kayla)	2	1	0	0	0	0	2	1	0	0	0	0
10	Wong ,K (Kayla)	2	1202.8	1202.8	0	0	0	2	1211.6	1202.8	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Robinson, Z (Zachariah)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms