Chess South Africa Ratings Database

PLAYER PAGE

Personal

Booysen, ZAJ (Zian)

Chess SA id

1120155245

FIDE id

Date of birth

2012-06-12 (U14)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-20

Personal details last changed

1900-01-01

Junior GPX Games

46.5

Junior GPX Points

1296.2

Item	Main	Standard	Rapid	Blitz
Rating	1367.1	1370.6	1214.7	1200
Raw rating	1367.1	1370.6	1214.7	1200
Weighted rating	1324.8	1319.6	1203.1	1200
Weighted performance	1354.1	1354.6	0	0
Floor	878.6	873.8	755.4	700
K-factor	36	36	36	36
Min/Max rating change allowed	130.7	130	162.4	165.8
Highest rating	1383 2024-11-01	1373.8 2025-09-01	1462.5 2023-06-01	1200 2018-10-01
Highest raw rating	1378.6 2024-11-01	1373.8 2025-09-01	1255.4 2023-10-01	1200 2024-02-01
Highest weighted rating	1324.8 2025-11-01	1319.6 2025-11-01	1255.4 2023-10-01	1200 2018-10-01
Highest weighted performance	1383 2024-11-01	1372.9 2024-11-01	1462.5 2023-06-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1367.1	1370.6	1214.7	1200
Analysis
Rating	1367.1	1370.6	1214.7	1200
Raw rating	1367.1	1370.6	1214.7	1200
Weighted rating	1324.8	1319.6	1203.1
Weighted performance	1354.1	1354.6	0
K-factor	36	36	36	36
Floor	878.6	873.8	755.4	700
Max/Min rating change allowed	130.7	130	162.4	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	1367.1	1370.6	1214.7	1200
New weighted rating	1330.4	1325.6	1205	1200
New weighted performance	1346	1346.5	0	0
Temp new rating	1367.1	1370.6	1214.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1367.1	1370.6	1214.7	1200
New K-factor	36	36	36	36
New floor	878.6	873.8	755.4	700

Item	Main	Standard	Rapid
	0	0	0
	34	29	5
	65	58	7
	30	20	10
	5	5	0
	0	0	0
History	134	112	22

Games since
	Main 99	Standard 87		Rapid 12		Blitz 0
Gender	Male
Age group	U14
Region	Sedibeng (GSV)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	2526		878		87
Male	2036		702		73
U14	420		141		18
U14 Male	309		100		14
Standard
	RSA		Province		Region
Overall	2423		903		90
Male	1952		725		75
U14	412		148		22
U14 Male	302		103		16
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	34	20.5	60.29	87.5	1289.9	1377.4
Standard	29	18	62.07	102.6	1278	1380.6
Rapid	5	2.5	50	0	1358.8	1358.8
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	134	71.5	53.36	28.5	1270.6	1299.1
Standard	112	60.5	54.02	34.2	1271.8	1306
Rapid	22	11	50	0	1264.2	1264.2
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1367.1	1370.6	1214.7	1200
2025-09-30	1368.3	1372.4	1214.7	1200
2025-09-01	1368.6	1373.8	1214.7	1200
2025-08-01	1307.6	1298.1	1214.7	1200
2025-07-01	1307.6	1296	1214.7	1200
2025-06-01	1340.5	1330.2	1214.7	1200
2025-05-01	1325.2	1312	1214.7	1200
2025-04-01	1319.3	1312	1203.5	1200
2025-03-01	1315.3	1305.6	1203.5	1200
2025-02-01	1315.3	1305.6	1203.5	1200
2025-01-01	1315.3	1305.6	1203.5	1200
2024-12-01	1348.1	1336.9	1203.5	1200
2024-11-01	1378.6	1372.9	1203.5	1200
2024-10-01	1330.4	1333.1	1203.5	1200
2024-09-01	1317.3	1299.6	1203.5	1200
2024-08-01	1309.2	1285.9	1203.5	1200
2024-07-01	1293	1285.9	1154.2	1200
2024-09-01	1293	1285.9	1154.2	1200
2024-05-01	1293	1285.9	1154.2	1200
2024-04-01	1158.8	1165.9	1154.2	1200
2024-03-01	1185.7	1210.5	1154.2	1200
2024-02-01	1185.7	1210.5	1154.2	1200
2024-01-01	1191.8	1222.4	1154.2	1200
2023-12-01	1191.8	1222.4	1154.2	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	2025 Gauteng Top Schools Teams (U13)	2025-08-29	2025-08-29	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
2	Laerskool Eligwa Open 20 Sept 2025 (D)	2025-09-20	2025-09-20	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
3	GDE (D7) Sedibeng East Schools 2025 (U13)	2025-08-02	2025-08-02	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
4	LS Vryheidsmonument Chess Open 21 Jun 2025 (C)	2025-06-21	2025-06-21	Standard	Sedibeng (GSV)	5	4	1	Yes	Analysis
5	GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U13 Boys)	2025-05-24	2025-05-24	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
6	HS Overvaal Rapid 12 Apr 2025 (D)	2025-04-12	2025-04-12	Rapid	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
7	Hoerskool Drie Riviere Open 08 March 2025 (D)	2025-03-08	2025-03-08	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Gauteng Top Schools Teams (U13)	2025-08-29	2025-08-29	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
2	Laerskool Eligwa Open 20 Sept 2025 (D)	2025-09-20	2025-09-20	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
3	GDE (D7) Sedibeng East Schools 2025 (U13)	2025-08-02	2025-08-02	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
4	LS Vryheidsmonument Chess Open 21 Jun 2025 (C)	2025-06-21	2025-06-21	Standard	Sedibeng (GSV)	5	4	1	Yes	Analysis
5	GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U13 Boys)	2025-05-24	2025-05-24	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
6	HS Overvaal Rapid 12 Apr 2025 (D)	2025-04-12	2025-04-12	Rapid	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
7	Hoerskool Drie Riviere Open 08 March 2025 (D)	2025-03-08	2025-03-08	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
8	Gauteng Inter-Region at UJ 2024 (U14 Open)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
9	Queens Gambit Chess Open 2024 (C)	2024-11-23	2024-11-23	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
10	NWU Vaal Chess Open 12 Oct 2024 (D)	2024-10-12	2024-10-12	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
11	Kings Gambit Chess Open 14 Sept 2024 (D)	2024-09-14	2024-09-14	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
12	North School Primary Chess Open 2024 (D)	2024-08-31	2024-08-31	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
13	Sedibeng East D7 Teams Trials 2024 (U13)	2024-08-03	2024-08-03	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
14	Midvaal Winter Classic 13 July 2024 (E)	2024-07-13	2024-07-13	Rapid	Sedibeng (GSV)	7	7	4.5	Yes	Analysis
15	Hoerskool Overvaal Chess Open 2024 (D)	2024-04-20	2024-04-20	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
16	Vaalpark Primary Chess Open 2024 (D)	2024-04-13	2024-04-13	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
17	HS Drie Riviere Chess Open Section 2024 (D)	2024-03-09	2024-03-09	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
18	NG Kerk Vanderbijlpark Suid 2024 (D)	2024-02-24	2024-02-24	Standard	Sedibeng (GSV)	5	5	1	Yes	Analysis
19	Laerskool Midvaal Chess Open Section 2024 (D)	2024-02-10	2024-02-10	Standard	Sedibeng (GSV)	5	4	2	Yes	Analysis
20	2024 Gauteng Inter-Region Chess Championship (U14C)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	4	2	Yes	Analysis
21	NWU Vaal Open 2023 (D)	2023-10-14	2023-10-14	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
22	Dr Pieter Hangelbroek Rapid 2023 (C)	2023-10-28	2023-10-28	Rapid	Sedibeng (GSV)	5	5	0	Yes	Analysis
23	Gauteng D7 Teams 2023 (U11)	2023-08-12	2023-08-12	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
24	VaalPark Primary Open Chess 2023 (E)	2023-06-16	2023-06-16	Rapid	Sedibeng (GSV)	5	5	4	Yes	Analysis
25	Gauteng Schools D7 2023 (U11 Boys)	2023-05-20	2023-05-20	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
26	Gauteng Schools Individual Finals 2023 (U11 Boys)	2023-05-26	2023-05-26	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
27	Gaueng Schools D7 2022 (U11 Boys)	2022-06-04	2022-06-04	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament LS Vryheidsmonument Chess Open 21 Jun 2025				Tournament GDE (D7) Sedibeng East Schools 2025
		date 2025-06-21	rnd 5	type Standard	result 1	date 2025-08-02	rnd 5	type Standard	result 1
		Opponent Lempe, R (Rorisang)				Opponent Sello, T (Tumelo)
2	6	Tournament Midvaal Winter Classic 13 July 2024				Tournament Sedibeng East D7 Teams Trials 2024
		date 2024-07-13	rnd 4	type Rapid	result 1	date 2024-08-03	rnd 2	type Standard	result 1
		Opponent Lombaard, W (Wian)				Opponent Gumeda, E (Enoch)
3	5	Tournament Hoerskool Drie Riviere Open 08 March 2025				Tournament HS Overvaal Rapid 12 Apr 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-04-12	rnd 3	type Rapid	result 1
		Opponent Nagel, A (Abigail)				Opponent Reddy, M (Matthew)

#	Games	Start				End
1	8	Tournament LS Vryheidsmonument Chess Open 21 Jun 2025				Tournament Laerskool Eligwa Open 20 Sept 2025
		date 2025-06-21	rnd 5	type Standard	result 1	date 2025-09-20	rnd 2	type Standard	result 1
		Opponent Lempe, R (Rorisang)				Opponent le Hanie, M (Mikhael)
2	4	Tournament Hoerskool Drie Riviere Open 08 March 2025				Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-05-24	rnd 2	type Standard	result 1
		Opponent Nagel, A (Abigail)				Opponent Liebenberg, H (Hermanus Albertus)
3	4	Tournament NWU Vaal Chess Open 12 Oct 2024				Tournament Queens Gambit Chess Open 2024
		date 2024-10-12	rnd 3	type Standard	result 1	date 2024-11-23	rnd 1	type Standard	result 1
		Opponent Mantshawu, Q (Qhayiya)				Opponent Marnewick, C (Conner)

#	Games	Start				End
1	7	Tournament Midvaal Winter Classic 13 July 2024				Tournament HS Overvaal Rapid 12 Apr 2025
		date 2024-07-13	rnd 4	type Rapid	result 1	date 2025-04-12	rnd 3	type Rapid	result 1
		Opponent Lombaard, W (Wian)				Opponent Reddy, M (Matthew)
2	4	Tournament VaalPark Primary Open Chess 2023				Tournament VaalPark Primary Open Chess 2023
		date 2023-06-16	rnd 2	type Rapid	result 1	date 2023-06-16	rnd 5	type Rapid	result 1
		Opponent Mnisi, N (Nhlamulo)				Opponent Wessels, C (Christo)
3	1	Tournament Midvaal Winter Classic 13 July 2024				Tournament Midvaal Winter Classic 13 July 2024
		date 2024-07-13	rnd 1	type Rapid	result 1	date 2024-07-13	rnd 1	type Rapid	result 1
		Opponent Du Toit, M (Monika)				Opponent Du Toit, M (Monika)

No games found.

#	Games	Start				End

#	Games	Start				End
1	8	Tournament LS Vryheidsmonument Chess Open 21 Jun 2025				Tournament Laerskool Eligwa Open 20 Sept 2025
		date 2025-06-21	rnd 5	type Standard	result 1	date 2025-09-20	rnd 2	type Standard	result 1
		Opponent Lempe, R (Rorisang)				Opponent le Hanie, M (Mikhael)
2	5	Tournament VaalPark Primary Open Chess 2023				Tournament Gauteng D7 Teams 2023
		date 2023-06-16	rnd 2	type Rapid	result 1	date 2023-08-12	rnd 1	type Standard	result 1
		Opponent Mnisi, N (Nhlamulo)				Opponent Mkhuma, K (Kamohelo)
3	4	Tournament NWU Vaal Chess Open 12 Oct 2024				Tournament Queens Gambit Chess Open 2024
		date 2024-10-12	rnd 3	type Standard	result 1	date 2024-11-23	rnd 1	type Standard	result 1
		Opponent Mantshawu, Q (Qhayiya)				Opponent Marnewick, C (Conner)

#	Games	Start				End
1	8	Tournament LS Vryheidsmonument Chess Open 21 Jun 2025				Tournament Laerskool Eligwa Open 20 Sept 2025
		date 2025-06-21	rnd 5	type Standard	result 1	date 2025-09-20	rnd 2	type Standard	result 1
		Opponent Lempe, R (Rorisang)				Opponent le Hanie, M (Mikhael)
2	4	Tournament Hoerskool Drie Riviere Open 08 March 2025				Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-05-24	rnd 2	type Standard	result 1
		Opponent Nagel, A (Abigail)				Opponent Liebenberg, H (Hermanus Albertus)
3	4	Tournament NWU Vaal Chess Open 12 Oct 2024				Tournament Queens Gambit Chess Open 2024
		date 2024-10-12	rnd 3	type Standard	result 1	date 2024-11-23	rnd 1	type Standard	result 1
		Opponent Mantshawu, Q (Qhayiya)				Opponent Marnewick, C (Conner)

#	Games	Start				End
1	4	Tournament VaalPark Primary Open Chess 2023				Tournament VaalPark Primary Open Chess 2023
		date 2023-06-16	rnd 2	type Rapid	result 1	date 2023-06-16	rnd 5	type Rapid	result 1
		Opponent Mnisi, N (Nhlamulo)				Opponent Wessels, C (Christo)
2	2	Tournament Midvaal Winter Classic 13 July 2024				Tournament HS Overvaal Rapid 12 Apr 2025
		date 2024-07-13	rnd 7	type Rapid	result 1	date 2025-04-12	rnd 1	type Rapid	result 1
		Opponent Jonker, C (Corne)				Opponent Esterhuizen, E (Erich)
3	2	Tournament Midvaal Winter Classic 13 July 2024				Tournament Midvaal Winter Classic 13 July 2024
		date 2024-07-13	rnd 4	type Rapid	result 1	date 2024-07-13	rnd 5	type Rapid	result 1
		Opponent Lombaard, W (Wian)				Opponent Coetzer, A (Ashlynn)

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	Blignaut ,A (Alma)	5	5	425	5	5	425	0	0	0	0	0	0
1	Blignaut ,A (Alma)	5	1182.2	1607.2	5	1178.7	1607.2	0	0	0	0	0	0
2	Motloung ,I (Israel)	5	2	-85	4	2	0	1	0	-425	0	0	0
2	Motloung ,I (Israel)	5	1350.6	1265.6	4	1307.8	1350.6	1	1292.5	925.6	0	0	0
3	Brand ,H (Henko)	4	0	-425	4	0	-425	0	0	0	0	0	0
3	Brand ,H (Henko)	4	1495.6	1070.6	4	1484.9	1070.6	0	0	0	0	0	0
4	Myburgh ,V (Vaughn)	4	1	-212.5	4	1	-212.5	0	0	0	0	0	0
4	Myburgh ,V (Vaughn)	4	1305.6	1093.1	4	1292.1	1093.1	0	0	0	0	0	0
5	Du Toit ,M (Monika)	4	2	0	3	1	-141.7	1	1	425	0	0	0
5	Du Toit ,M (Monika)	4	1305.4	1305.4	3	1321.6	1163.7	1	1204	1730.4	0	0	0
6	Nagel ,D (Divan)	3	0	-425	3	0	-425	0	0	0	0	0	0
6	Nagel ,D (Divan)	3	1438.8	1013.8	3	1432.6	1013.8	0	0	0	0	0	0
7	Marnewick ,C (Conner)	3	3	425	3	3	425	0	0	0	0	0	0
7	Marnewick ,C (Conner)	3	1176	1601	3	1175.3	1601	0	0	0	0	0	0
8	Nagel ,A (Abigail)	3	3	425	3	3	425	0	0	0	0	0	0
8	Nagel ,A (Abigail)	3	1055.2	1480.2	3	1035.8	1480.2	0	0	0	0	0	0
9	Bezuidenhoudt ,M (Marlo)	3	1	-141.7	2	0.5	-212.5	1	0.5	0	0	0	0
9	Bezuidenhoudt ,M (Marlo)	3	1431	1289.3	2	1388.8	1218.5	1	1366	1431	0	0	0
10	Van Der Merwe ,W (Willem)	3	1	-141.7	2	1	0	1	0	-425	0	0	0
10	Van Der Merwe ,W (Willem)	3	1320.7	1179	2	1314.1	1320.7	1	1200	895.7	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Booysen, ZAJ (Zian)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms