Chess South Africa Ratings Database

PLAYER PAGE

Personal

Sadalla, J (Johnny)

Chess SA id

1100192158

FIDE id

Date of birth

2010-02-12 (U18)

Gender

Male

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-12-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1521.5	1517.5	1195.4	1200
Raw rating	1521.5	1517.5	1195.4	1200
Weighted rating	1430.2	1442.3	1194.3	1200
Weighted performance	1498.6	1496.5	0	0
Floor	1021.5	1017.5	710.8	700
K-factor	32	32	36	36
Min/Max rating change allowed	104.9	105.5	166.9	165.8
Highest rating	1575.5 2024-02-01	1568 2024-02-01	1237.1 2024-03-01	1200 2024-02-01
Highest raw rating	1521.5 2026-01-01	1517.5 2026-01-01	1210.8 2024-04-01	1200 2024-02-01
Highest weighted rating	1493.2 2024-10-01	1485.9 2024-10-01	1210.8 2024-07-01	1200 2024-02-01
Highest weighted performance	1575.5 2024-02-01	1568 2024-02-01	1237.1 2024-03-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1521.5	1517.5	1195.4	1200
Analysis
Rating	1521.5	1517.5	1195.4	1200
Raw rating	1521.5	1517.5	1195.4	1200
Weighted rating	1430.2	1442.3	1194.3
Weighted performance	1498.6	1496.5	0
K-factor	32	32	36	36
Floor	1021.5	1017.5	710.8	700
Max/Min rating change allowed	104.9	105.5	166.9	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	1521.5	1517.5	1195.4	1200
New weighted rating	1441.2	1451.7	1194.2	1200
New weighted performance	1488.6	1486.5	0	0
Temp new rating	1521.5	1517.5	1195.4	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1521.5	1517.5	1195.4	1200
New K-factor	32	32	36	36
New floor	1021.5	1017.5	710.8	700

Item	Main	Standard	Rapid
	0	0	0
	35	35	0
	74	58	16
	0	0	0
	0	0	0
	0	0	0
History	109	93	16

Games since
	Main 109	Standard 93		Rapid 16		Blitz 0
Gender	Male
Age group	U16
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	1364		467		171
Male	1154		386		139
U16	175		55		22
U16 Male	139		41		16
Standard
	RSA		Province		Region
Overall	1378		503		185
Male	1157		414		149
U16	191		62		24
U16 Male	151		46		18
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	35	25	71.43	182.1	1317.3	1499.5
Standard	35	25	71.43	182.1	1317.3	1499.5
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	109	68	62.39	105.3	1300.8	1406
Standard	93	60	64.52	123.4	1313	1436.3
Rapid	16	8	50	0	1229.9	1229.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1521.5	1517.5	1195.4	1200
2025-11-30	1487.2	1478.1	1195.4	1200
2025-11-01	1487.2	1478.1	1195.4	1200
2025-09-30	1516.1	1515.6	1195.4	1200
2025-09-01	1497.3	1491.6	1195.4	1200
2025-08-01	1493.2	1485.9	1195.4	1200
2025-07-01	1493.2	1485.9	1195.4	1200
2025-06-01	1469.3	1459.3	1195.4	1200
2025-05-01	1380.9	1413	1195.4	1200
2025-04-01	1380.9	1413	1195.4	1200
2025-03-01	1380.9	1413	1195.4	1200
2025-02-01	1364.7	1404.5	1194.5	1200
2025-01-01	1364.7	1404.5	1179.1	1200
2024-12-01	1330.9	1378.6	1179.1	1200
2024-11-01	1330.9	1378.6	1179.1	1200
2024-10-01	1330.9	1378.6	1179.1	1200
2024-09-01	1347.8	1387.2	1199.3	1200
2024-11-01	1347.8	1387.2	1199.3	1200
2024-07-01	1329.1	1337.5	1210.8	1200
2024-06-01	1285.1	1300.8	1210.8	1200
2024-05-01	1309.3	1325.3	1210.8	1200
2024-04-01	1273.4	1282.8	1210.8	1200
2024-03-01	1269.7	1282.8	1200	1200
2024-02-01	1200	1200	1200	1200

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Gauteng Inter-Region at Emerald Resort 2025 (U16 Championship)	2025-12-06	2025-12-07	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
2	2025 Gauteng Schools Provincial Individual Chess Championship (U15 Boys)	2025-09-27	2025-09-27	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
3	Ekurhuleni Trial 4 2025 (D)	2025-09-21	2025-09-21	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
4	Ekurhuleni Trials 2025 (D)	2025-07-26	2025-07-26	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
5	Ekurhuleni Trial 2 2025 (D)	2025-06-21	2025-06-21	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
6	Ekurhuleni Trials 2025 (D)	2025-05-24	2025-05-24	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
7	CPH May 2025 (B)	2025-05-03	2025-05-03	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
8	D6 SH Individual 2025 (U15 Boys)	2025-02-22	2025-02-22	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
9	Gauteng Inter-Region at UJ 2024 (U16 Candidates)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	3.5	Yes	Analysis
10	Ekurhuleni Chess Soncini Playoffs 2024 (Boys)	2024-09-14	2024-09-14	Rapid	Ekurhuleni (GE)	5	5	2	Yes	Analysis
11	Ekurhuleni Closed 2024 (U16)	2024-09-21	2024-09-21	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
12	Mzansi Spring Open 2024 (Intermediate)	2024-09-07	2024-09-07	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
13	Ekurhuleni Trails 3 2024 (U16)	2024-08-24	2024-08-24	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
14	2024 D6 Team Finals (U15)	2024-08-03	2024-08-03	Standard	Ekurhuleni (GE)	5	0	0	No	Analysis
15	Gauteng Schools Individuals Finals 2024 (U15 Boys)	2024-08-17	2024-08-17	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
16	Ekurhuleni Trails 2 2024 (U16)	2024-07-27	2024-07-27	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
17	2024 D6 Teams (Pool C U15)	2024-07-20	2024-07-20	Rapid	Ekurhuleni (GE)	5	4	2	Yes	Analysis
18	Chess Power House July Open 2024 (B)	2024-07-20	2024-07-20	Standard	Johannesburg Metro (GJM)	5	0	0	No	Analysis
19	Ekurhuleni Trails 1 2024 (U16)	2024-06-01	2024-06-01	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
20	D6 High School Individual Final 2024 (U15 Boys)	2024-05-18	2024-05-18	Standard	Ekurhuleni (GE)	5	4	2.5	Yes	Analysis
21	Chess Power House May Open 2024 (B)	2024-05-25	2024-05-25	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
22	2024 Mid Gauteng Open Chess Tournament (U16)	2024-05-02	2024-05-02	Standard	Tshwane (GTP)	5	4	1	Yes	Analysis
23	Ekurhuleni Open 2024 (C)	2024-04-06	2024-04-06	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
24	Ekurhuleni North Chess Club Open Tournament 2024 (C)	2024-03-02	2024-03-02	Rapid	Ehlanzeni (MEN)	7	7	4	Yes	Analysis
25	2024 Constantiapark Open (C)	2024-02-17	2024-02-17	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis

#	Games	Start				End
1	7	Tournament Ekurhuleni Trials 2025				Tournament Ekurhuleni Trial 2 2025
		date 2025-05-24	rnd 1	type Standard	result 1	date 2025-06-21	rnd 2	type Standard	result 1
		Opponent Nel, Z (Zachery)				Opponent Ndlovu, W (Wayne)
2	5	Tournament 2024 D6 Teams				Tournament Ekurhuleni Trails 2 2024
		date 2024-07-20	rnd 4	type Rapid	result 1	date 2024-07-27	rnd 4	type Standard	result 1
		Opponent Makgwarela, K (Kholofelo)				Opponent Hattingh, T (Tiaan)
3	4	Tournament Ekurhuleni Trials 2025				Tournament Ekurhuleni Trial 4 2025
		date 2025-07-26	rnd 4	type Standard	result 1	date 2025-09-21	rnd 2	type Standard	result 1
		Opponent Netshimbupfe, Y (Yoanda)				Opponent Ndlovu, W (Wayne)

#	Games	Start				End
1	7	Tournament Ekurhuleni Trials 2025				Tournament Ekurhuleni Trial 2 2025
		date 2025-05-24	rnd 1	type Standard	result 1	date 2025-06-21	rnd 2	type Standard	result 1
		Opponent Nel, Z (Zachery)				Opponent Ndlovu, W (Wayne)
2	7	Tournament Ekurhuleni Trails 1 2024				Tournament Ekurhuleni Trails 2 2024
		date 2024-06-01	rnd 3	type Standard	result 1	date 2024-07-27	rnd 4	type Standard	result 1
		Opponent Van Den Berg, Z (Zandre)				Opponent Hattingh, T (Tiaan)
3	5	Tournament 2024 Constantiapark Open				Tournament Ekurhuleni Open 2024
		date 2024-02-17	rnd 4	type Standard	result 1	date 2024-04-06	rnd 3	type Standard	result 1
		Opponent Groenewald, S (Stefan)				Opponent Smith, H (Henre)

#	Games	Start				End
1	3	Tournament 2024 D6 Teams				Tournament Ekurhuleni Chess Soncini Playoffs 2024
		date 2024-07-20	rnd 4	type Rapid	result 1	date 2024-09-14	rnd 2	type Rapid	result 1
		Opponent Makgwarela, K (Kholofelo)				Opponent Erasmus, M (Max)
2	2	Tournament Ekurhuleni North Chess Club Open Tournament 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2024-03-02	rnd 3	type Rapid	result 1	date 2024-03-02	rnd 4	type Rapid	result 1
		Opponent Mogotsi, R (Reatlehile)				Opponent Bhika, J (Jyotikka)
3	1	Tournament 2024 D6 Teams				Tournament 2024 D6 Teams
		date 2024-07-20	rnd 2	type Rapid	result 1	date 2024-07-20	rnd 2	type Rapid	result 1
		Opponent Naidoo, J (Janeshan)				Opponent Naidoo, J (Janeshan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Ekurhuleni Trial 2 2025				Tournament Ekurhuleni Trials 2025
		date 2025-06-21	rnd 4	type Standard	result 1	date 2025-07-26	rnd 2	type Standard	result 1
		Opponent Devereux, C (Cayden)				Opponent Gupta, M (Mishka)
2	4	Tournament D6 SH Individual 2025				Tournament D6 SH Individual 2025
		date 2025-02-22	rnd 2	type Standard	result 1	date 2025-02-22	rnd 5	type Standard	result 1
		Opponent Mhlongo, A (Andries)				Opponent Garib, A (Arayan)
3	4	Tournament Ekurhuleni North Chess Club Open Tournament 2024				Tournament Ekurhuleni Open 2024
		date 2024-03-02	rnd 7	type Rapid	result 1	date 2024-04-06	rnd 3	type Standard	result 1
		Opponent Janse Van Vuuren, A (Alexander)				Opponent Smith, H (Henre)

#	Games	Start				End
1	5	Tournament 2024 Constantiapark Open				Tournament Ekurhuleni Open 2024
		date 2024-02-17	rnd 4	type Standard	result 1	date 2024-04-06	rnd 3	type Standard	result 1
		Opponent Groenewald, S (Stefan)				Opponent Smith, H (Henre)
2	4	Tournament Ekurhuleni Trial 2 2025				Tournament Ekurhuleni Trials 2025
		date 2025-06-21	rnd 4	type Standard	result 1	date 2025-07-26	rnd 2	type Standard	result 1
		Opponent Devereux, C (Cayden)				Opponent Gupta, M (Mishka)
3	4	Tournament D6 SH Individual 2025				Tournament D6 SH Individual 2025
		date 2025-02-22	rnd 2	type Standard	result 1	date 2025-02-22	rnd 5	type Standard	result 1
		Opponent Mhlongo, A (Andries)				Opponent Garib, A (Arayan)

#	Games	Start				End
1	3	Tournament 2024 D6 Teams				Tournament Ekurhuleni Chess Soncini Playoffs 2024
		date 2024-07-20	rnd 4	type Rapid	result 1	date 2024-09-14	rnd 2	type Rapid	result 1
		Opponent Makgwarela, K (Kholofelo)				Opponent Erasmus, M (Max)
2	2	Tournament Ekurhuleni North Chess Club Open Tournament 2024				Tournament Ekurhuleni North Chess Club Open Tournament 2024
		date 2024-03-02	rnd 3	type Rapid	result 1	date 2024-03-02	rnd 4	type Rapid	result 1
		Opponent Mogotsi, R (Reatlehile)				Opponent Bhika, J (Jyotikka)
3	1	Tournament 2024 D6 Teams				Tournament 2024 D6 Teams
		date 2024-07-20	rnd 2	type Rapid	result 1	date 2024-07-20	rnd 2	type Rapid	result 1
		Opponent Naidoo, J (Janeshan)				Opponent Naidoo, J (Janeshan)

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	Voogt ,R (Ruan)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
1	Voogt ,R (Ruan)	3	1304.4	1446	3	1304.6	1446	0	0	0	0	0	0
2	Van Den Berg ,Z (Zandre)	2	1	0	2	1	0	0	0	0	0	0	0
2	Van Den Berg ,Z (Zandre)	2	1241.8	1241.8	2	1249.2	1241.8	0	0	0	0	0	0
3	Devereux ,C (Cayden)	2	2	425	2	2	425	0	0	0	0	0	0
3	Devereux ,C (Cayden)	2	1281.4	1706.4	2	1269.2	1706.4	0	0	0	0	0	0
4	Ndlovu ,W (Wayne)	2	2	425	2	2	425	0	0	0	0	0	0
4	Ndlovu ,W (Wayne)	2	1375.5	1800.5	2	1354.4	1800.5	0	0	0	0	0	0
5	Shen Yu ,F (Frank)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
5	Shen Yu ,F (Frank)	2	1499.8	1287.3	2	1481	1287.3	0	0	0	0	0	0
6	Hlope ,S (Siphosethu)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Hlope ,S (Siphosethu)	2	1354.2	929.2	2	1378.2	929.2	0	0	0	0	0	0
7	Nickols ,C (Christi)	2	2	425	2	2	425	0	0	0	0	0	0
7	Nickols ,C (Christi)	2	1268	1693	2	1275.8	1693	0	0	0	0	0	0
8	Netshimbupfe ,Y (Yoanda)	2	2	425	2	2	425	0	0	0	0	0	0
8	Netshimbupfe ,Y (Yoanda)	2	1234.8	1659.8	2	1265.4	1659.8	0	0	0	0	0	0
9	Janse Van Vuuren ,A (Alexander)	2	1.5	212.5	1	0.5	0	1	1	425	0	0	0
9	Janse Van Vuuren ,A (Alexander)	2	1068.4	1280.9	1	1067.1	1068.4	1	1179.5	1493.4	0	0	0
10	Saunders ,W (Wayde)	2	0.5	-212.5	1	0.5	0	1	0	-425	0	0	0
10	Saunders ,W (Wayde)	2	1445.9	1233.4	1	1469.6	1445.9	1	1237.2	1020.9	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Sadalla, J (Johnny)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms