Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Rooyen, S (Sergio)

Chess SA id

1080099747

FIDE id

Date of birth

2008-11-07 (U18)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-06-21

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1269.5

Item	Main	Standard	Rapid	Blitz
Rating	1300.1	1280.3	1234.3	1200
Raw rating	1300.1	1280.3	1234.3	1200
Weighted rating	1267.5	1254.5	1199	1200
Weighted performance	1222.7	1202	1012.7	0
Floor	800.1	780.3	736	700
K-factor	36	36	36	36
Min/Max rating change allowed	143.8	147.9	157.9	165.8
Highest rating	1300.1 2025-08-01	1280.3 2025-08-01	1267.2 2019-02-01	1200 2018-10-01
Highest raw rating	1300.1 2025-08-01	1280.3 2025-08-01	1236 2021-06-01	1200 2024-02-01
Highest weighted rating	1256.3 2025-08-01	1243.1 2025-08-01	1236 2022-03-01	1200 2018-10-01
Highest weighted performance	1284.3 2025-08-01	1258.8 2025-01-01	1267.2 2019-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1300.1	1280.3	1234.3	1200
Analysis
Rating	1300.1	1280.3	1234.3	1200
Raw rating	1300.1	1280.3	1234.3	1200
Weighted rating	1267.5	1254.5	1199
Weighted performance	1222.7	1202	1012.7
K-factor	36	36	36	36
Floor	800.1	780.3	736	700
Max/Min rating change allowed	143.8	147.9	157.9	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	1300.1	1280.3	1234.3	1200
New weighted rating	1270.9	1257.8	1202.1	1200
New weighted performance	1214.9	1194.3	1005.9	0
Temp new rating	1300.1	1280.3	1234.3	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1300.1	1280.3	1234.3	1200
New K-factor	36	36	36	36
New floor	800.1	780.3	736	700

Item	Main	Standard	Rapid
	0	0	0
	19	11	8
	34	10	24
	43	17	26
	8	4	4
	10	0	10
History	132	53	79

Games since
	Main 58	Standard 21		Rapid 37		Blitz 0
Gender	Male
Age group	U18
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	3271		1075		101
Male	2558		799		73
U18	497		146		21
U18 Male	409		112		18
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	1465		726		175
Male	1147		558		125
U18	170		82		33
U18 Male	146		69		30
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	19	11	57.89	67.1	1269.1	1336.2
Standard	11	6	54.55	38.6	1264.1	1302.7
Rapid	8	5	62.5	106.2	1276	1382.3
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	132	62	46.97	-25.8	1235.5	1209.7
Standard	53	25	47.17	-24.1	1247.4	1223.4
Rapid	79	37	46.84	-26.9	1227.5	1200.6
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1300.1	1280.3	1234.3	1200
2025-09-30	1300.1	1280.3	1234.3	1200
2025-09-01	1300.1	1280.3	1234.3	1200
2025-08-01	1300.1	1280.3	1234.3	1200
2025-07-01	1280.8	1267.9	1208.9	1200
2025-06-01	1280.8	1267.9	1208.9	1200
2025-05-01	1280.8	1267.9	1208.9	1200
2025-04-01	1280.8	1267.9	1208.9	1200
2025-03-01	1278	1266.7	1208.9	1200
2025-02-01	1265	1266.7	1169.6	1200
2025-01-01	1265	1266.7	1141.8	1200
2024-12-01	1224.1	1231.1	1141.8	1200
2024-11-01	1200.2	1208.8	1141.8	1200
2024-10-01	1200.2	1208.8	1141.8	1200
2024-09-01	1200.2	1208.8	1141.8	1200
2024-08-01	1200.2	1208.8	1141.8	1200
2024-07-01	1247.8	1208.8	1211.3	1200
2024-09-01	1247.8	1208.8	1211.3	1200
2024-05-01	1246.5	1208.8	1197.3	1200
2024-04-01	1246.5	1208.8	1197.3	1200
2024-03-01	1246.5	1208.8	1197.3	1200
2024-02-01	1267.5	1208.8	1222.9	1200
2024-01-01	1267.5	1208.8	1222.9	1200
2023-12-01	1267.5	1208.8	1222.9	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	Upper West Coast Top Schools 2025 (U17+U19)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	3	2	Yes	Analysis
2	Deep Blue Open 2025 (B)	2025-06-21	2025-06-21	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
3	West Coast Schools Chess Prestige 2025 (U17 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
4	Upper West Coast Presrige 2025 (U17 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Upper West Coast Top Schools 2025 (U17+U19)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	3	2	Yes	Analysis
2	Deep Blue Open 2025 (B)	2025-06-21	2025-06-21	Standard	West Coast (WCU)	5	5	3	Yes	Analysis
3	West Coast Schools Chess Prestige 2025 (U17 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
4	Upper West Coast Presrige 2025 (U17 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
5	St. Helena Bay Chess Club Open 2024 (B)	2024-12-07	2024-12-07	Standard	West Coast (WCU)	5	5	3.5	Yes	Analysis
6	PR Booyse Standard Tournament 2024 (Open)	2024-11-02	2024-11-02	Standard	West Coast (WCU)	5	5	3.5	Yes	Analysis
7	Vredendal North CC Open 2024 (Elite)	2024-07-27	2024-07-27	Rapid	West Coast (WCU)	5	5	1	Yes	Analysis
8	Pedro Booyse Annual Rapid 2024 (Open)	2024-07-06	2024-07-06	Rapid	West Coast (WCU)	5	4	1	Yes	Analysis
9	Bo-Weskus Skole Skaak Top Skole 2024 (O18)	2024-05-11	2024-05-11	Rapid	West Coast (WCU)	5	5	2.5	Yes	Analysis
10	West Coast Schools Chess Prestige Championships 2024 (U18+U20 Boys)	2024-02-24	2024-02-24	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis
11	Bo-Weskus Skole Prestige 2024 (O18 Seuns)	2024-02-10	2024-02-10	Rapid	West Coast (WCU)	5	5	2.5	Yes	Analysis
12	Clanwilliam Chess Club Open 2023 (B)	2023-12-02	2023-12-02	Rapid	West Coast (WCU)	5	5	3.5	Yes	Analysis
13	Youth Day 2 2023 (Elite)	2023-06-24	2023-06-24	Rapid	West Coast (WCU)	5	5	1.5	Yes	Analysis
14	West Coast Open 2023 (Open)	2023-05-20	2023-06-03	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
15	Upper West Coast Top Schools Championship 2023 (High School)	2023-06-10	2023-06-10	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
16	Western Cape HS Individuals 2023 (U15 Boys)	2023-04-01	2023-04-02	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
17	PRBCC Closed 2023 (A)	2023-04-15	2023-04-15	Rapid	West Coast (WCU)	6	6	2	Yes	Analysis
18	West Coast High School Championships 2023 (U15 Boys)	2023-02-18	2023-02-18	Standard	West Coast (WCU)	6	6	3	Yes	Analysis
19	Bo-Weskus Skole Prestige 2023 (O15 Seuns)	2023-02-11	2023-02-11	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis
20	Pedro Booyse Top Schools 2022 (U15 Open)	2022-07-23	2022-07-23	Standard	West Coast (WCU)	6	4	1	Yes	Analysis
21	Bo-Weskus Top Skole 2022 (Hoerskool)	2022-06-11	2022-06-11	Rapid	West Coast (WCU)	5	4	2	Yes	Analysis
22	West Coast Primary Schools Prestige 2021 (U13 Boys)	2021-09-18	2021-09-18	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis
23	Bo-Weskus Skole Skaak Prestige 2021 (O13 Seuns)	2021-05-08	2021-05-08	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
24	Bo-Weskus Skole Prestige 2020 (O13 Seuns)	2020-02-15	2020-02-15	Standard	West Coast (WCU)	6	1	0	Yes	Analysis
25	Weskus Skole Prestige Skaak Kampioenskappe 2019 (O11 Seuns)	2019-03-02	2019-04-06	Standard	West Coast (WCU)	6	5	1	Yes	Analysis
26	Bo-Weskus Skole Skaak Prestige 2019 (O11 Seuns)	2019-02-16	2019-02-16	Rapid	West Coast (WCU)	7	7	4	Yes	Analysis
27	West Coast Schools Prestige Individual Championship 2018 (U11 Boys)	2018-03-10	2018-03-24	Standard	West Coast (WCU)	6	5	1	Yes	Analysis

#	Games	Start				End
1	7	Tournament West Coast Open 2023				Tournament Upper West Coast Top Schools Championship 2023
		date 2023-05-20	rnd 2	type Standard	result 1	date 2023-06-10	rnd 3	type Rapid	result 1
		Opponent September, G (G-Naro)				Opponent Cloete, H (Howard)
2	6	Tournament Clanwilliam Chess Club Open 2023				Tournament Bo-Weskus Skole Prestige 2024
		date 2023-12-02	rnd 2	type Rapid	result 0.5	date 2024-02-10	rnd 2	type Rapid	result 1
		Opponent Love, C (Celine)				Opponent Ruiters, A (Arnold-James)
3	5	Tournament PR Booyse Standard Tournament 2024				Tournament St. Helena Bay Chess Club Open 2024
		date 2024-11-02	rnd 4	type Standard	result 1	date 2024-12-07	rnd 3	type Standard	result 0.5
		Opponent Nel, A (Albi)				Opponent White, J (Jonavan)

#	Games	Start				End
1	6	Tournament West Coast Open 2023				Tournament PR Booyse Standard Tournament 2024
		date 2023-05-20	rnd 2	type Standard	result 1	date 2024-11-02	rnd 2	type Standard	result 1
		Opponent September, G (G-Naro)				Opponent Arries, G (Gerswin)
2	5	Tournament PR Booyse Standard Tournament 2024				Tournament St. Helena Bay Chess Club Open 2024
		date 2024-11-02	rnd 4	type Standard	result 1	date 2024-12-07	rnd 3	type Standard	result 0.5
		Opponent Nel, A (Albi)				Opponent White, J (Jonavan)
3	4	Tournament West Coast High School Championships 2023				Tournament Western Cape HS Individuals 2023
		date 2023-02-18	rnd 5	type Standard	result 1	date 2023-04-01	rnd 2	type Standard	result 1
		Opponent Sawayer, L (Luke)				Opponent Eaton, M (Morgan)

#	Games	Start				End
1	6	Tournament Clanwilliam Chess Club Open 2023				Tournament Bo-Weskus Skole Prestige 2024
		date 2023-12-02	rnd 2	type Rapid	result 0.5	date 2024-02-10	rnd 2	type Rapid	result 1
		Opponent Love, C (Celine)				Opponent Ruiters, A (Arnold-James)
2	3	Tournament Upper West Coast Presrige 2025				Tournament Upper West Coast Top Schools 2025
		date 2025-02-22	rnd 5	type Rapid	result 1	date 2025-06-14	rnd 2	type Rapid	result 1
		Opponent Noorman, J (Jaden)				Opponent De Bruin, E (Elrise)
3	3	Tournament Bo-Weskus Skole Skaak Top Skole 2024				Tournament Bo-Weskus Skole Skaak Top Skole 2024
		date 2024-05-11	rnd 2	type Rapid	result 1	date 2024-05-11	rnd 4	type Rapid	result 1
		Opponent Van Zyl, A (Ane)				Opponent Johnson, J (Jerolin)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament West Coast Open 2023				Tournament Upper West Coast Top Schools Championship 2023
		date 2023-05-20	rnd 2	type Standard	result 1	date 2023-06-10	rnd 3	type Rapid	result 1
		Opponent September, G (G-Naro)				Opponent Cloete, H (Howard)
2	5	Tournament Clanwilliam Chess Club Open 2023				Tournament Bo-Weskus Skole Prestige 2024
		date 2023-12-02	rnd 3	type Rapid	result 1	date 2024-02-10	rnd 2	type Rapid	result 1
		Opponent Ruiters, B (Brendon)				Opponent Ruiters, A (Arnold-James)
3	4	Tournament West Coast High School Championships 2023				Tournament Western Cape HS Individuals 2023
		date 2023-02-18	rnd 5	type Standard	result 1	date 2023-04-01	rnd 2	type Standard	result 1
		Opponent Sawayer, L (Luke)				Opponent Eaton, M (Morgan)

#	Games	Start				End
1	6	Tournament West Coast Open 2023				Tournament PR Booyse Standard Tournament 2024
		date 2023-05-20	rnd 2	type Standard	result 1	date 2024-11-02	rnd 2	type Standard	result 1
		Opponent September, G (G-Naro)				Opponent Arries, G (Gerswin)
2	4	Tournament West Coast High School Championships 2023				Tournament Western Cape HS Individuals 2023
		date 2023-02-18	rnd 5	type Standard	result 1	date 2023-04-01	rnd 2	type Standard	result 1
		Opponent Sawayer, L (Luke)				Opponent Eaton, M (Morgan)
3	2	Tournament West Coast Schools Chess Prestige 2025				Tournament West Coast Schools Chess Prestige 2025
		date 2025-03-08	rnd 2	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Morobi, M (Miguel)				Opponent Khesa, S (Sive)

#	Games	Start				End
1	5	Tournament Clanwilliam Chess Club Open 2023				Tournament Bo-Weskus Skole Prestige 2024
		date 2023-12-02	rnd 3	type Rapid	result 1	date 2024-02-10	rnd 2	type Rapid	result 1
		Opponent Ruiters, B (Brendon)				Opponent Ruiters, A (Arnold-James)
2	3	Tournament Upper West Coast Presrige 2025				Tournament Upper West Coast Top Schools 2025
		date 2025-02-22	rnd 5	type Rapid	result 1	date 2025-06-14	rnd 2	type Rapid	result 1
		Opponent Noorman, J (Jaden)				Opponent De Bruin, E (Elrise)
3	3	Tournament Upper West Coast Top Schools Championship 2023				Tournament Upper West Coast Top Schools Championship 2023
		date 2023-06-10	rnd 1	type Rapid	result 1	date 2023-06-10	rnd 3	type Rapid	result 1
		Opponent De Bruin, E (Elrise)				Opponent Cloete, H (Howard)

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	Cloete ,C (Caleb)	3	1	-141.7	2	1	0	1	0	-425	0	0	0
1	Cloete ,C (Caleb)	3	1165.2	1023.6	2	1235.6	1165.2	1	1110.4	740.2	0	0	0
2	Gentles ,A (Abrian)	3	1.5	0	2	1	0	1	0.5	0	0	0	0
2	Gentles ,A (Abrian)	3	1248.1	1248.1	2	1232.6	1248.1	1	1216	1248.1	0	0	0
3	September ,C (Carltin)	3	1	-141.7	1	1	425	2	0	-425	0	0	0
3	September ,C (Carltin)	3	1190.1	1048.4	1	1077.2	1615.1	2	1259.6	765.1	0	0	0
4	White ,J (Jonovan)	3	1.5	0	1	0.5	0	2	1	0	0	0	0
4	White ,J (Jonovan)	3	1204.5	1204.5	1	1201.8	1204.5	2	1158.6	1204.5	0	0	0
5	Cloete ,H (Howard)	3	1	-141.7	0	0	0	3	1	-141.7	0	0	0
5	Cloete ,H (Howard)	3	1215.9	1074.3	0	0	0	3	1123.9	1074.3	0	0	0
6	Bell ,N (Neyo)	3	1	-141.7	0	0	0	3	1	-141.7	0	0	0
6	Bell ,N (Neyo)	3	1252.4	1110.7	0	0	0	3	1285.3	1110.7	0	0	0
7	Maarman ,C (Christiano)	2	0	-425	2	0	-425	0	0	0	0	0	0
7	Maarman ,C (Christiano)	2	1281	856	2	1269.1	856	0	0	0	0	0	0
8	Kilroe-Smith ,I (Isabel)	2	0	-425	2	0	-425	0	0	0	0	0	0
8	Kilroe-Smith ,I (Isabel)	2	1172.1	747.1	2	1134.4	747.1	0	0	0	0	0	0
9	Makatees ,H (Haywill)	2	2	425	1	1	425	1	1	425	0	0	0
9	Makatees ,H (Haywill)	2	1204.2	1629.2	1	1200	1629.2	1	1200	1629.2	0	0	0
10	Kotzee ,W (Wesley)	2	0	-425	1	0	-425	1	0	-425	0	0	0
10	Kotzee ,W (Wesley)	2	1344.7	919.7	1	1312.8	919.7	1	1312	919.7	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

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Statistics

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PLAYER PAGE

Personal

Van Rooyen, S (Sergio)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms