Chess South Africa Ratings Database

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Personal

Witbooi, S (Sergio)

Chess SA id

1100151059

FIDE id

Date of birth

2010-08-06 (U16)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-04-12

Personal details last changed

1900-01-01

Junior GPX Games

27.5

Junior GPX Points

1381.9

Item	Main	Standard	Rapid	Blitz
Rating	1382.8	1416.8	1209	1200
Raw rating	1382.8	1416.8	1209	1200
Weighted rating	1306.4	1321.6	1204.9	1200
Weighted performance	1284.4	1327.2	0	0
Floor	882.8	916.8	709	700
K-factor	36	32	36	36
Min/Max rating change allowed	127.8	121.8	163.7	165.8
Highest rating	1382.8 2025-05-05	1416.8 2025-05-05	1209 2025-04-01	1200 2018-10-01
Highest raw rating	1382.8 2025-05-05	1416.8 2025-05-05	1209 2025-04-01	1200 2024-02-01
Highest weighted rating	1382.8 2024-03-01	1416.8 2024-03-01	1203.3 2025-08-01	1200 2018-10-01
Highest weighted performance	1370.2 2025-05-05	1416.8 2023-02-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1382.8	1416.8	1209	1200
Analysis
Rating	1382.8	1416.8	1209	1200
Raw rating	1382.8	1416.8	1209	1200
Weighted rating	1306.4	1321.6	1204.9
Weighted performance	1284.4	1327.2	0
K-factor	36	32	36	36
Floor	882.8	916.8	709	700
Max/Min rating change allowed	127.8	121.8	163.7	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	1382.8	1416.8	1209	1200
New weighted rating	1315.4	1332.7	1205.4	1200
New weighted performance	1276.3	1318.8	0	0
Temp new rating	1382.8	1416.8	1209	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1382.8	1416.8	1209	1200
New K-factor	36	32	36	36
New floor	882.8	916.8	709	700

Item	Main	Standard	Rapid
	0	0	0
	31	25	6
	30	30	0
	3	3	0
	0	0	0
	0	0	0
History	64	58	6

Games since
	Main 61	Standard 55		Rapid 6		Blitz 0
Gender	Male
Age group	U16
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	2376		740		196
Male	1920		574		152
U16	367		120		33
U16 Male	275		84		24
Standard
	RSA		Province		Region
Overall	1917		532		148
Male	1571		417		117
U16	278		84		26
U16 Male	217		63		21
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	31	19.5	62.9	109.7	1319.3	1429
Standard	25	16.5	66	136	1327.5	1463.5
Rapid	6	3	50	0	1285	1285
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	64	35	54.69	39.8	1283.3	1323.1
Standard	58	32	55.17	44	1283.1	1327
Rapid	6	3	50	0	1285	1285
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1382.8	1416.8	1209	1200
2025-09-30	1382.8	1416.8	1209	1200
2025-09-01	1382.8	1416.8	1209	1200
2025-08-01	1382.8	1416.8	1209	1200
2025-07-01	1382.8	1416.8	1209	1200
2025-06-01	1382.8	1416.8	1209	1200
2025-05-01	1382.8	1416.8	1209	1200
2025-04-01	1356.5	1376.3	1209	1200
2025-03-01	1266.1	1272.8	1200	1200
2025-02-01	1212.6	1207.4	1200	1200
2025-01-01	1210.7	1202.2	1200	1200
2024-12-01	1210.7	1202.2	1200	1200
2024-11-01	1210.7	1202.2	1200	1200
2024-10-01	1210.7	1202.2	1200	1200
2024-09-01	1210.7	1202.2	1200	1200
2024-08-01	1210.7	1202.2	1200	1200
2024-07-01	1210.7	1202.2	1200	1200
2024-09-01	1210.7	1202.2	1200	1200
2024-05-01	1210.7	1202.2	1200	1200
2024-04-01	1184.1	1165.1	1200	1200
2024-03-01	1239.7	1245	1200	1200
2024-02-01	1217.9	1221.6	1200	1200
2024-01-01	1217.9	1221.6	1200	1200
2023-12-01	1217.9	1221.6	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	Eden Chess Trials 2 2025 (U16)	2025-03-15	2025-04-12	Standard	Eden (WEG)	10	10	5.5	Yes	Analysis
2	Oudtshoorn Rapid 2025 (Open)	2025-03-28	2025-03-28	Rapid	Eden (WEG)	6	6	3	Yes	Analysis
3	Eden Schools Chess Trials 1 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	3	Yes	Analysis
4	Oudussa Trials 2025 (U15)	2025-03-01	2025-03-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis
5	Oudussa Trials 2 2025 (U5 Boys+Girls)	2025-02-01	2025-02-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Eden Chess Trials 2 2025 (U16)	2025-03-15	2025-04-12	Standard	Eden (WEG)	10	10	5.5	Yes	Analysis
2	Oudtshoorn Rapid 2025 (Open)	2025-03-28	2025-03-28	Rapid	Eden (WEG)	6	6	3	Yes	Analysis
3	Eden Schools Chess Trials 1 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	3	Yes	Analysis
4	Oudussa Trials 2025 (U15)	2025-03-01	2025-03-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis
5	Oudussa Trials 2 2025 (U5 Boys+Girls)	2025-02-01	2025-02-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis
6	Eden Chess Trials 2 2024 (U16)	2024-04-13	2024-04-20	Standard	Eden (WEG)	10	9	4.5	Yes	Analysis
7	Western Cape HS Individuals Championship 2024 (U15 Boys)	2024-03-21	2024-03-22	Standard	Overberg (WOS)	6	6	1	Yes	Analysis
8	Eden School Chess Trials 1 2024 (U15 Boys)	2024-03-09	2024-03-09	Standard	Eden (WEG)	5	5	2	Yes	Analysis
9	OUDUSSA Trials 2 2024 (U15 Boys)	2024-02-17	2024-02-17	Standard	Eden (WEG)	5	5	2.5	Yes	Analysis
10	OUDUSSA Trials 1 2024 (U15 Boys)	2024-02-03	2024-02-03	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
11	Oudussa Proewe 1 2023 (U13 Boys)	2023-02-11	2023-02-11	Standard	Eden (WEG)	5	3	2	Yes	Analysis

#	Games	Start				End
1	14	Tournament Eden Chess Trials 2 2024				Tournament Eden Schools Chess Trials 1 2025
		date 2024-04-20	rnd 8	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Magomarele, R (Rachel)				Opponent Mncube, S (Sifiso)
2	6	Tournament Oudussa Proewe 1 2023				Tournament OUDUSSA Trials 1 2024
		date 2023-02-11	rnd 4	type Standard	result 1	date 2024-02-03	rnd 4	type Standard	result 0.5
		Opponent Samson, H (Heinrique-Pete)				Opponent Sarels, I (Isaan)
3	4	Tournament Oudtshoorn Rapid 2025				Tournament Eden Chess Trials 2 2025
		date 2025-03-28	rnd 5	type Rapid	result 1	date 2025-04-12	rnd 7	type Standard	result 0.5
		Opponent Kamfer, M (Miqeul)				Opponent Etsala-Kourou, B (Billy)

#	Games	Start				End
1	14	Tournament Eden Chess Trials 2 2024				Tournament Eden Schools Chess Trials 1 2025
		date 2024-04-20	rnd 8	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Magomarele, R (Rachel)				Opponent Mncube, S (Sifiso)
2	6	Tournament Oudussa Proewe 1 2023				Tournament OUDUSSA Trials 1 2024
		date 2023-02-11	rnd 4	type Standard	result 1	date 2024-02-03	rnd 4	type Standard	result 0.5
		Opponent Samson, H (Heinrique-Pete)				Opponent Sarels, I (Isaan)
3	4	Tournament Eden Chess Trials 2 2025				Tournament Eden Chess Trials 2 2025
		date 2025-03-15	rnd 4	type Standard	result 0.5	date 2025-04-12	rnd 7	type Standard	result 0.5
		Opponent Julies, M (Miche)				Opponent Etsala-Kourou, B (Billy)

#	Games	Start				End
1	2	Tournament Oudtshoorn Rapid 2025				Tournament Oudtshoorn Rapid 2025
		date 2025-03-28	rnd 5	type Rapid	result 1	date 2025-03-28	rnd 6	type Rapid	result 1
		Opponent Kamfer, M (Miqeul)				Opponent Van Wyngard, M (Monty)
2	1	Tournament Oudtshoorn Rapid 2025				Tournament Oudtshoorn Rapid 2025
		date 2025-03-28	rnd 2	type Rapid	result 1	date 2025-03-28	rnd 2	type Rapid	result 1
		Opponent Gelderblom, J (Jayden)				Opponent Gelderblom, J (Jayden)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Oudussa Proewe 1 2023				Tournament OUDUSSA Trials 1 2024
		date 2023-02-11	rnd 4	type Standard	result 1	date 2024-02-03	rnd 3	type Standard	result 1
		Opponent Samson, H (Heinrique-Pete)				Opponent Thorne, J (Joey)
2	4	Tournament Eden Schools Chess Trials 1 2025				Tournament Eden Chess Trials 2 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Mccreedy, J (James)				Opponent Petersen, S (Shenwin)
3	3	Tournament Oudussa Trials 2 2025				Tournament Oudussa Trials 2025
		date 2025-02-01	rnd 5	type Standard	result 1	date 2025-03-01	rnd 2	type Standard	result 1
		Opponent Prins, S (Staton Lee)				Opponent van Wyk, M (Mikhail)

#	Games	Start				End
1	5	Tournament Oudussa Proewe 1 2023				Tournament OUDUSSA Trials 1 2024
		date 2023-02-11	rnd 4	type Standard	result 1	date 2024-02-03	rnd 3	type Standard	result 1
		Opponent Samson, H (Heinrique-Pete)				Opponent Thorne, J (Joey)
2	4	Tournament Eden Schools Chess Trials 1 2025				Tournament Eden Chess Trials 2 2025
		date 2025-03-08	rnd 4	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Mccreedy, J (James)				Opponent Petersen, S (Shenwin)
3	3	Tournament Oudussa Trials 2 2025				Tournament Oudussa Trials 2025
		date 2025-02-01	rnd 5	type Standard	result 1	date 2025-03-01	rnd 2	type Standard	result 1
		Opponent Prins, S (Staton Lee)				Opponent van Wyk, M (Mikhail)

#	Games	Start				End
1	2	Tournament Oudtshoorn Rapid 2025				Tournament Oudtshoorn Rapid 2025
		date 2025-03-28	rnd 5	type Rapid	result 1	date 2025-03-28	rnd 6	type Rapid	result 1
		Opponent Kamfer, M (Miqeul)				Opponent Van Wyngard, M (Monty)
2	1	Tournament Oudtshoorn Rapid 2025				Tournament Oudtshoorn Rapid 2025
		date 2025-03-28	rnd 2	type Rapid	result 1	date 2025-03-28	rnd 2	type Rapid	result 1
		Opponent Gelderblom, J (Jayden)				Opponent Gelderblom, J (Jayden)

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	Jansen ,R (Riaan Junior)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
1	Jansen ,R (Riaan Junior)	3	1245.4	1103.8	3	1248.3	1103.8	0	0	0	0	0	0
2	Sarels ,I (Isaan)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
2	Sarels ,I (Isaan)	3	1283.6	1283.6	3	1293.6	1283.6	0	0	0	0	0	0
3	Stander ,J (Jack)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
3	Stander ,J (Jack)	3	1296.6	1296.6	3	1299.1	1296.6	0	0	0	0	0	0
4	Stephanus ,E (Earl)	2	0	-425	2	0	-425	0	0	0	0	0	0
4	Stephanus ,E (Earl)	2	1438.4	1013.4	2	1471.6	1013.4	0	0	0	0	0	0
5	Julies ,M (Miche)	2	1	0	2	1	0	0	0	0	0	0	0
5	Julies ,M (Miche)	2	1409	1409	2	1418.9	1409	0	0	0	0	0	0
6	Thorne ,J (Joey)	2	1	0	2	1	0	0	0	0	0	0	0
6	Thorne ,J (Joey)	2	1209.2	1209.2	2	1206.3	1209.2	0	0	0	0	0	0
7	Claasen ,R (Rowen)	2	1	0	2	1	0	0	0	0	0	0	0
7	Claasen ,R (Rowen)	2	1201.7	1201.7	2	1203.6	1201.7	0	0	0	0	0	0
8	Joseph ,W (William)	1	1	425	1	1	425	0	0	0	0	0	0
8	Joseph ,W (William)	1	1378.3	1803.3	1	1379.7	1803.3	0	0	0	0	0	0
9	Koelman ,L (Laytham)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Koelman ,L (Laytham)	1	1200	775	1	1200	775	0	0	0	0	0	0
10	Rothman ,W (Wade)	1	1	425	1	1	425	0	0	0	0	0	0
10	Rothman ,W (Wade)	1	1133.7	1558.7	1	1124.8	1558.7	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

Witbooi, 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