Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Der Merwe, S (Sebastian)

Chess SA id

1140141808

FIDE id

Date of birth

2014-07-18 (U12)

Gender

Male

Region

Buffalo City (EBC)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-07-26

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1195.2	1208.3	1183.6	1059.7
Raw rating	1195.2	1208.3	1183.6	1059.7
Weighted rating	1184.6	1196.1	1183.6	1054.7
Weighted performance	1087.7	1092.8	749.6	0
Floor	766.3	781	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	167	163.9	169.7	202.5
Highest rating	1266.9 2023-02-01	1353.3 2023-02-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1266.3 2023-09-01	1281 2023-09-01	1200 2019-12-01	1200 2019-12-01
Highest weighted rating	1266.3 2023-10-01	1281 2023-09-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1266.9 2023-02-01	1353.3 2023-02-01	1200 2019-12-01	1200 2019-12-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1195.2	1208.3	1183.6	1059.7
Analysis
Rating	1195.2	1208.3	1183.6	1059.7
Raw rating	1195.2	1208.3	1183.6	1059.7
Weighted rating	1184.6	1196.1	1183.6
Weighted performance	1087.7	1092.8	749.6
K-factor	36	36	36	36
Floor	766.3	781	700	700
Max/Min rating change allowed	167	163.9	169.7	202.5
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	1195.2	1208.3	1183.6	1059.7
New weighted rating	1185.7	1197.3	1183.6	1055.4
New weighted performance	1080.6	1085.7	742.8	0
Temp new rating	1195.2	1208.3	1183.6	1059.7
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1195.2	1208.3	1183.6	1059.7
New K-factor	36	36	36	36
New floor	766.3	781	700	700

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	9	9	0	0
	29	20	0	9
	47	31	7	9
	29	5	24	0
	0	0	0	0
History	114	65	31	18

Games since
	Main 38	Standard 29		Rapid 0		Blitz 9
Gender	Male
Age group	U12
Region	Buffalo City (EBC)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U12	-1		-1		-1
U12 Male	-1		-1		-1
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	9	4	44.44	-47.2	1261.1	1213.9
Standard	9	4	44.44	-47.2	1261.1	1213.9
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	114	51.5	45.18	-41	1216.1	1175.1
Standard	65	32	49.23	-6.5	1220.2	1213.7
Rapid	31	15.5	50	0	1190.2	1190.2
Blitz	18	4	22.22	-236.1	1245.7	1009.5

Date	Main	Standard	Rapid	Blitz
2025-11-01	1195.2	1208.3	1183.6	1059.7
2025-09-30	1195.2	1208.3	1183.6	1059.7
2025-09-01	1195.2	1208.3	1183.6	1059.7
2025-08-01	1183.1	1193.4	1183.6	1059.7
2025-07-01	1183.1	1193.4	1183.6	1059.7
2025-06-01	1183.1	1193.4	1183.6	1059.7
2025-05-01	1183.1	1193.4	1183.6	1059.7
2025-04-01	1184.7	1196.2	1183.6	1059.7
2025-03-01	1184.7	1196.2	1183.6	1059.7
2025-02-01	1184.7	1196.2	1183.6	1059.7
2025-01-01	1177.9	1187.4	1183.6	1045.6
2024-12-01	1177.9	1187.4	1183.6	1045.6
2024-11-01	1177.9	1187.4	1183.6	1045.6
2024-10-01	1177.9	1187.4	1183.6	1045.6
2024-09-01	1177.9	1187.4	1183.6	1045.6
2024-08-01	1186.9	1200	1183.6	1045.6
2024-07-01	1186.9	1200	1183.6	1045.6
2024-09-01	1186.9	1200	1183.6	1045.6
2024-05-01	1168.7	1182.4	1183.6	1045.6
2024-04-01	1168.7	1182.4	1183.6	1045.6
2024-03-01	1182.1	1197.9	1183.6	1045.6
2024-02-01	1166.6	1184.9	1183.6	1045.6
2024-01-01	1175.4	1184.9	1183.6	1043.2
2023-12-01	1175.4	1184.9	1183.6	1043.2

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	BC Schools Chess Festival 2025 (U11 Open)	2025-07-26	2025-07-26	Standard	Buffalo City (EBC)	5	4	2	Yes	Analysis
2	2025 Buffalo City Chess Trials 1 (U12)	2025-03-22	2025-03-22	Standard	Buffalo City (EBC)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	BC Schools Chess Festival 2025 (U11 Open)	2025-07-26	2025-07-26	Standard	Buffalo City (EBC)	5	4	2	Yes	Analysis
2	2025 Buffalo City Chess Trials 1 (U12)	2025-03-22	2025-03-22	Standard	Buffalo City (EBC)	5	5	2	Yes	Analysis
3	5th BC Trails 2024 (U12A)	2024-08-17	2024-08-17	Standard	Buffalo City (EBC)	5	5	2	Yes	Analysis
4	3rd BC Trials 2024 (U12A)	2024-05-11	2024-05-11	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
5	2nd BC Trials 2024 (U12A)	2024-03-09	2024-03-09	Standard	Buffalo City (EBC)	5	5	2	Yes	Analysis
6	Buffalo City Vikings Chess Trials 2024 (U12A)	2024-02-03	2024-02-03	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
7	Chess Vikings VP-Mall Blitz 2024 (B)	2024-01-27	2024-01-27	Blitz	Buffalo City (EBC)	9	9	3	Yes	Analysis
8	Chess Vikings Exam Rapid 2023 (B)	2023-11-04	2023-11-04	Rapid	Buffalo City (EBC)	7	0	0	No	Analysis
9	Chess Vikings Wild Card 2023 (U10+U12)	2023-10-02	2023-10-02	Standard	Buffalo City (EBC)	6	4	1.5	Yes	Analysis
10	BC Vikings Closed 2023 (U10)	2023-10-03	2023-10-04	Standard	Buffalo City (EBC)	8	7	2.5	Yes	Analysis
11	BC Vikings Blitz Championship 2023	2023-10-05	2023-10-05	Blitz	Buffalo City (EBC)	10	9	1	Yes	Analysis
12	BC 5th Trials 2023 (U10A)	2023-09-02	2023-09-02	Standard	Buffalo City (EBC)	5	5	1	Yes	Analysis
13	3rd BC Trials 2023 (U10A)	2023-08-12	2023-08-12	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
14	2nd BC Trials 2023 (U10A)	2023-06-03	2023-06-03	Rapid	Buffalo City (EBC)	7	7	4	Yes	Analysis
15	2nd Little Vikings 2023 (U10B)	2023-02-23	2023-02-23	Standard	Buffalo City (EBC)	5	5	4	Yes	Analysis
16	Little Vikings 2023 (U10B+U12B)	2023-02-11	2023-02-11	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
17	Slum Knights 5th 2022 (C)	2022-10-22	2022-10-22	Standard	Buffalo City (EBC)	5	5	3	Yes	Analysis
18	Slum Knights 3rd Open 2022 (C)	2022-09-18	2022-09-18	Rapid	Buffalo City (EBC)	6	6	2.5	Yes	Analysis
19	Slum Knights 2nd Open 2022 (C)	2022-09-17	2022-09-17	Rapid	Buffalo City (EBC)	6	6	3.5	Yes	Analysis
20	Slum Knights 2022 (C)	2022-08-06	2022-08-06	Rapid	Buffalo City (EBC)	6	6	3	Yes	Analysis
21	BC Chess 4th Border Trials 2022 (C)	2022-05-21	2022-05-21	Rapid	Buffalo City (EBC)	6	6	2.5	Yes	Analysis

#	Games	Start				End
1	5	Tournament 2nd Little Vikings 2023				Tournament 2nd BC Trials 2023
		date 2023-02-23	rnd 2	type Standard	result 1	date 2023-06-03	rnd 1	type Rapid	result 1
		Opponent Motjamela, A (Alunamda)				Opponent Claasen, T (Tatum)
2	3	Tournament 2nd BC Trials 2023				Tournament 3rd BC Trials 2023
		date 2023-06-03	rnd 7	type Rapid	result 1	date 2023-08-12	rnd 2	type Standard	result 1
		Opponent Motjamela, A (Alunamda)				Opponent Motjamela, A (Alunamda)
3	3	Tournament Slum Knights 5th 2022				Tournament Little Vikings 2023
		date 2022-10-22	rnd 5	type Standard	result 1	date 2023-02-11	rnd 2	type Standard	result 1
		Opponent Scheeld, L (Liam)				Opponent Manqunyana, L (Luphelo)

#	Games	Start				End
1	6	Tournament 2nd Little Vikings 2023				Tournament 3rd BC Trials 2023
		date 2023-02-23	rnd 2	type Standard	result 1	date 2023-08-12	rnd 2	type Standard	result 1
		Opponent Motjamela, A (Alunamda)				Opponent Motjamela, A (Alunamda)
2	3	Tournament Slum Knights 5th 2022				Tournament Little Vikings 2023
		date 2022-10-22	rnd 5	type Standard	result 1	date 2023-02-11	rnd 2	type Standard	result 1
		Opponent Scheeld, L (Liam)				Opponent Manqunyana, L (Luphelo)
3	2	Tournament 2025 Buffalo City Chess Trials 1				Tournament 2025 Buffalo City Chess Trials 1
		date 2025-03-22	rnd 3	type Standard	result 1	date 2025-03-22	rnd 4	type Standard	result 1
		Opponent Dayimani, N (Ngcali)				Opponent Nyembezi, T (Tshepo)

#	Games	Start				End
1	3	Tournament Slum Knights 2nd Open 2022				Tournament Slum Knights 2nd Open 2022
		date 2022-09-17	rnd 3	type Rapid	result 0.5	date 2022-09-17	rnd 5	type Rapid	result 1
		Opponent Dayimani, I (Imbo)				Opponent Khandoo, N (Nilan)
2	2	Tournament 2nd BC Trials 2023				Tournament 2nd BC Trials 2023
		date 2023-06-03	rnd 4	type Rapid	result 1	date 2023-06-03	rnd 5	type Rapid	result 1
		Opponent Dayimani, I (Imbo)				Opponent Mahlakata, L (Limile)
3	2	Tournament Slum Knights 3rd Open 2022				Tournament 2nd BC Trials 2023
		date 2022-09-18	rnd 6	type Rapid	result 0.5	date 2023-06-03	rnd 1	type Rapid	result 1
		Opponent Scheeld, L (Liam)				Opponent Claasen, T (Tatum)

#	Games	Start				End
1	1	Tournament Chess Vikings VP-Mall Blitz 2024				Tournament Chess Vikings VP-Mall Blitz 2024
		date 2024-01-27	rnd 8	type Blitz	result 1	date 2024-01-27	rnd 8	type Blitz	result 1
		Opponent Bele, A (Akahluma)				Opponent Bele, A (Akahluma)
2	1	Tournament Chess Vikings VP-Mall Blitz 2024				Tournament Chess Vikings VP-Mall Blitz 2024
		date 2024-01-27	rnd 6	type Blitz	result 1	date 2024-01-27	rnd 6	type Blitz	result 1
		Opponent Scheeld, L (Liam)				Opponent Scheeld, L (Liam)
3	1	Tournament Chess Vikings VP-Mall Blitz 2024				Tournament Chess Vikings VP-Mall Blitz 2024
		date 2024-01-27	rnd 4	type Blitz	result 1	date 2024-01-27	rnd 4	type Blitz	result 1
		Opponent Sibuko, L (Lulibo)				Opponent Sibuko, L (Lulibo)

#	Games	Start				End
1	5	Tournament 2nd Little Vikings 2023				Tournament 2nd BC Trials 2023
		date 2023-02-23	rnd 2	type Standard	result 1	date 2023-06-03	rnd 1	type Rapid	result 1
		Opponent Motjamela, A (Alunamda)				Opponent Claasen, T (Tatum)
2	3	Tournament 2nd BC Trials 2023				Tournament 3rd BC Trials 2023
		date 2023-06-03	rnd 7	type Rapid	result 1	date 2023-08-12	rnd 2	type Standard	result 1
		Opponent Motjamela, A (Alunamda)				Opponent Motjamela, A (Alunamda)
3	3	Tournament Slum Knights 5th 2022				Tournament Little Vikings 2023
		date 2022-10-22	rnd 5	type Standard	result 1	date 2023-02-11	rnd 2	type Standard	result 1
		Opponent Scheeld, L (Liam)				Opponent Manqunyana, L (Luphelo)

#	Games	Start				End
1	6	Tournament 2nd Little Vikings 2023				Tournament 3rd BC Trials 2023
		date 2023-02-23	rnd 2	type Standard	result 1	date 2023-08-12	rnd 2	type Standard	result 1
		Opponent Motjamela, A (Alunamda)				Opponent Motjamela, A (Alunamda)
2	3	Tournament Slum Knights 5th 2022				Tournament Little Vikings 2023
		date 2022-10-22	rnd 5	type Standard	result 1	date 2023-02-11	rnd 2	type Standard	result 1
		Opponent Scheeld, L (Liam)				Opponent Manqunyana, L (Luphelo)
3	2	Tournament 2025 Buffalo City Chess Trials 1				Tournament 2025 Buffalo City Chess Trials 1
		date 2025-03-22	rnd 3	type Standard	result 1	date 2025-03-22	rnd 4	type Standard	result 1
		Opponent Dayimani, N (Ngcali)				Opponent Nyembezi, T (Tshepo)

#	Games	Start				End
1	2	Tournament 2nd BC Trials 2023				Tournament 2nd BC Trials 2023
		date 2023-06-03	rnd 4	type Rapid	result 1	date 2023-06-03	rnd 5	type Rapid	result 1
		Opponent Dayimani, I (Imbo)				Opponent Mahlakata, L (Limile)
2	2	Tournament Slum Knights 3rd Open 2022				Tournament Slum Knights 3rd Open 2022
		date 2022-09-18	rnd 2	type Rapid	result 1	date 2022-09-18	rnd 3	type Rapid	result 1
		Opponent Jagers, N (Noah)				Opponent Wilderman, J (Jordez)
3	2	Tournament Slum Knights 2nd Open 2022				Tournament Slum Knights 2nd Open 2022
		date 2022-09-17	rnd 4	type Rapid	result 1	date 2022-09-17	rnd 5	type Rapid	result 1
		Opponent Hannan, T (Troy)				Opponent Khandoo, N (Nilan)

#	Games	Start				End
1	1	Tournament Chess Vikings VP-Mall Blitz 2024				Tournament Chess Vikings VP-Mall Blitz 2024
		date 2024-01-27	rnd 8	type Blitz	result 1	date 2024-01-27	rnd 8	type Blitz	result 1
		Opponent Bele, A (Akahluma)				Opponent Bele, A (Akahluma)
2	1	Tournament Chess Vikings VP-Mall Blitz 2024				Tournament Chess Vikings VP-Mall Blitz 2024
		date 2024-01-27	rnd 6	type Blitz	result 1	date 2024-01-27	rnd 6	type Blitz	result 1
		Opponent Scheeld, L (Liam)				Opponent Scheeld, L (Liam)
3	1	Tournament Chess Vikings VP-Mall Blitz 2024				Tournament Chess Vikings VP-Mall Blitz 2024
		date 2024-01-27	rnd 4	type Blitz	result 1	date 2024-01-27	rnd 4	type Blitz	result 1
		Opponent Sibuko, L (Lulibo)				Opponent Sibuko, L (Lulibo)

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	Kwelani ,L (Luthando)	6	0	-425	5	0	-425	1	0	-425	0	0	0
1	Kwelani ,L (Luthando)	6	1330	905	5	1333.5	905	1	1200	905	0	0	0
2	Ndwandwa ,L (Longezo)	5	1	-255	4	1	-212.5	1	0	-425	0	0	0
2	Ndwandwa ,L (Longezo)	5	1262.8	1007.8	4	1243.6	1050.3	1	1140.4	837.8	0	0	0
3	Scheeld ,L (Liam)	5	4.5	340	3	3	425	1	0.5	0	1	1	425
3	Scheeld ,L (Liam)	5	1043	1383	3	1065.6	1468	1	1097.2	1043	1	1200	1468
4	Khandoo ,N (Nilan)	5	2	-85	2	1	0	2	1	0	1	0	-425
4	Khandoo ,N (Nilan)	5	1270	1185	2	1354.8	1270	2	1249	1270	1	1200	845
5	Manqunyana ,L (Luphelo)	4	1	-212.5	3	1	-141.7	1	0	-425	0	0	0
5	Manqunyana ,L (Luphelo)	4	1256.5	1044	3	1259.2	1114.8	1	1200	831.5	0	0	0
6	Wildeman ,J (Jordez)	4	1	-212.5	3	1	-141.7	0	0	0	1	0	-425
6	Wildeman ,J (Jordez)	4	1241.2	1028.7	3	1251.7	1099.5	0	0	0	1	1200	816.2
7	Dayimani ,I (Imbo)	4	3.5	318.8	1	1	425	3	2.5	283.3	0	0	0
7	Dayimani ,I (Imbo)	4	1114.6	1433.3	1	1099.2	1539.6	3	1155.3	1397.9	0	0	0
8	Mxabo ,M (Masonwabe)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
8	Mxabo ,M (Masonwabe)	3	1302.6	1160.9	3	1302.9	1160.9	0	0	0	0	0	0
9	Chinyamurindi ,A (Anochengeta)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
9	Chinyamurindi ,A (Anochengeta)	3	1175	1033.3	3	1157.6	1033.3	0	0	0	0	0	0
10	Wiseman ,L (Luke)	3	0	-425	2	0	-425	1	0	-425	0	0	0
10	Wiseman ,L (Luke)	3	1111.6	686.6	2	1139.7	686.6	1	1096	686.6	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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Statistics

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PLAYER PAGE

Personal

Van Der Merwe, S (Sebastian)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms