Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Der Merwe, S (Sarah)

Chess SA id

209079855

FIDE id

Date of birth

2009-03-31 (U18)

Gender

Female

Region

Nelson Mandela Bay (ENM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2020-03-07

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1329.6	1325.2	732.4	601.2
Raw rating	1329.6	1325.2	732.4	601.2
Weighted rating	1329.6	1325.2	732.4	601.2
Weighted performance	386.9	384.7	0	0
Floor	829.6	825.2	500	500
K-factor	36	36	40	40
Min/Max rating change allowed	137.9	138.7	322.8	389.2
Highest rating	1344 2020-03-01	1336.4 2020-03-01	1200 2024-11-01	1200 2018-02-01
Highest raw rating	1329.6 2024-03-01	1325.2 2024-03-01	732.4 2024-03-01	621.2 2019-05-01
Highest weighted rating	1329.6 2024-03-01	1325.2 2025-02-01	732.4 2024-11-01	621.2 2024-11-01
Highest weighted performance	1344 2020-03-01	1336.4 2020-03-01	1200 2024-12-01	1200 2018-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1329.6	1325.2	732.4	601.2
Analysis
Rating	1329.6	1325.2	732.4	601.2
Raw rating	1329.6	1325.2	732.4	601.2
Weighted rating	1329.6	1325.2	732.4
Weighted performance	386.9	384.7	0
K-factor	36	36	40	40
Floor	829.6	825.2	500	500
Max/Min rating change allowed	137.9	138.7	322.8	389.2
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	1329.6	1325.2	732.4	601.2
New weighted rating	1329.6	1325.2	732.4	601.2
New weighted performance	379.1	376.9	0	0
Temp new rating	1329.6	1325.2	732.4	601.2
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1329.6	1325.2	732.4	601.2
New K-factor	36	36	40	40
New floor	829.6	825.2	500	500

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
	0	0	0	0
History	243	213	17	13

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Female
Age group	U18
Region	Nelson Mandela Bay (ENM)
Province	Eastern Cape (EC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	190	95	50	0	1127.7	1127.7
Standard	166	85	51.2	10.2	1125.5	1135.8
Rapid	11	6	54.55	38.6	1133.5	1172.1
Blitz	13	4	30.77	-163.5	1150.6	987.1

Date	Main	Standard	Rapid	Blitz
2025-11-01	1329.6	1325.2	732.4	601.2
2025-09-30	1329.6	1325.2	732.4	601.2
2025-09-01	1329.6	1325.2	732.4	601.2
2025-08-01	1329.6	1325.2	732.4	601.2
2025-07-01	1329.6	1325.2	732.4	601.2
2025-06-01	1329.6	1325.2	732.4	601.2
2025-05-01	1329.6	1325.2	732.4	601.2
2025-04-01	1329.6	1325.2	732.4	601.2
2025-03-01	1329.6	1325.2	732.4	601.2
2025-02-01	1329.6	1325.2	732.4	601.2
2025-01-01	1329.6	1325.2	732.4	601.2
2024-12-01	1329.6	1325.2	732.4	601.2
2024-11-01	1329.6	1325.2	732.4	601.2
2024-10-01	1329.6	1325.2	732.4	601.2
2024-09-01	1329.6	1325.2	732.4	601.2
2024-08-01	1329.6	1325.2	732.4	601.2
2024-07-01	1329.6	1325.2	732.4	601.2
2024-09-01	1329.6	1325.2	732.4	601.2
2024-05-01	1329.6	1325.2	732.4	601.2
2024-04-01	1329.6	1325.2	732.4	601.2
2024-03-01	1329.6	1325.2	732.4	601.2
2024-02-01	1329.6	1325.2	732.4	601.2
2024-01-01	1329.6	1325.2	732.4	601.2
2023-12-01	1329.6	1325.2	732.4	601.2

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	2020 NMBCU Chess Trials 2 2020 (U12)	2020-03-07	2020-03-07	Standard	Nelson Mandela Bay (ENM)	5	5	4	Yes	Analysis
2	King Cars Pe Chess Club Grand Prix Leg 1 2020	2020-02-15	2020-02-22	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
3	Brandwag Open 2020 (A)	2020-01-31	2020-02-01	Standard	Nelson Mandela Bay (ENM)	5	5	2	Yes	Analysis
4	2020 NMBCU Chess Trial 1 (U12)	2020-02-08	2020-02-09	Standard	Nelson Mandela Bay (ENM)	6	6	5	Yes	Analysis
5	2019 South African Junior Team Championships (U12A)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	4	Yes	Analysis
6	Ulitmate Chess Open 2019 (Rapid B)	2019-11-30	2019-11-30	Rapid	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
7	Ulitmate Chess Open 2019 (Blitz B)	2019-11-30	2019-11-30	Blitz	Nelson Mandela Bay (ENM)	6	5	1	Yes	Analysis
8	PE Chess Club Open 2019 (B)	2019-10-11	2019-10-13	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
9	COMMONWEALTH CHESS CHAMPIONSHIP-2019	2019-07-01	2009-07-07	Standard	India (IND)	7	6	1	Yes	Analysis
10	NMBYCC Closed 2019 (U12)	2019-07-26	2019-07-27	Standard	Nelson Mandela Bay (ENM)	6	6	3	Yes	Analysis
11	Nelson Mandela Bay Junior Trials 4 2019 (U12)	2019-07-12	2019-07-13	Standard	Nelson Mandela Bay (ENM)	6	6	4.5	Yes	Analysis
12	NMBJCU Trials 3 2019 (U12)	2019-05-10	2019-05-11	Standard	Nelson Mandela Bay (ENM)	6	6	5.5	Yes	Analysis
13	PECC King Cars Grand Prix Second Leg 2019	2019-04-13	2019-04-13	Blitz	Nelson Mandela Bay (ENM)	9	8	3	Yes	Analysis
14	Nelson Mandela Bay Junior Chess Trials 2 2019 (U12)	2019-04-05	2019-04-06	Standard	Nelson Mandela Bay (ENM)	6	6	4	Yes	Analysis
15	NMBCU Trials 1 2019 (U12)	2019-03-08	2019-03-09	Standard	Nelson Mandela Bay (ENM)	5	5	4	Yes	Analysis
16	2019 Boardwalk Pearson Open (Open)	2019-03-28	2019-03-31	Standard	Nelson Mandela Bay (ENM)	9	8	2	Yes	Analysis
17	2019 South African Junior Closed Chess Championship (U10 Girls)	2019-03-17	2019-03-22	Standard	Chess South Africa (CSA)	9	9	5	Yes	Analysis
18	King Cars PECC Grand Prix First Leg 2019	2019-02-02	2019-02-09	Standard	Nelson Mandela Bay (ENM)	6	6	2	Yes	Analysis
19	Ultimate Chess Open 2018 (B)	2018-11-30	2018-12-01	Standard	Nelson Mandela Bay (ENM)	6	6	1.5	Yes	Analysis
20	South African Junior Team Championships 2018 (U10A)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	3.5	Yes	Analysis
21	Mossel Bay Open 2018 (B)	2018-09-28	2018-09-29	Standard	Eden (WEG)	6	6	3	Yes	Analysis
22	PE Chess Club Open 2018 (A)	2018-09-21	2018-09-23	Standard	Nelson Mandela Bay (ENM)	6	4	0	Yes	Analysis
23	South African Open 2018 (C)	2018-07-11	2018-07-13	Standard	Mangaung (FMB)	6	6	2	Yes	Analysis
24	NMBJC Closed 2018 (U10)	2018-07-27	2018-07-28	Standard	Nelson Mandela Bay (ENM)	6	6	4	Yes	Analysis
25	NMBJC Trials 4 2018 (U10)	2018-07-20	2018-07-21	Standard	Nelson Mandela Bay (ENM)	5	5	3	Yes	Analysis
26	NMB Youth Chess Trial 3 2018 (U10)	2018-05-11	2018-05-12	Standard	Nelson Mandela Bay (ENM)	6	6	5	Yes	Analysis
27	Alekhine Open Chess Tournament 2018 (B)	2018-05-04	2018-05-05	Standard	Nelson Mandela Bay (ENM)	5	4	0	Yes	Analysis
28	NMB Second Trials 2018 (U10)	2018-04-20	2018-04-22	Standard	Nelson Mandela Bay (ENM)	5	5	3	Yes	Analysis
29	NMB First Trails 2018 (U10)	2018-03-23	2018-03-24	Standard	Nelson Mandela Bay (ENM)	6	6	4	Yes	Analysis
30	2018 Boardwalk Pearson Open (B)	2018-03-17	2018-03-18	Standard	Nelson Mandela Bay (ENM)	7	7	2	Yes	Analysis
31	Registration Tournament 2018 (B)	2018-02-23	2018-02-24	Standard	Nelson Mandela Bay (ENM)	5	5	2	Yes	Analysis
32	Despatch Open 2018 (B)	2018-02-17	2018-02-17	Rapid	Nelson Mandela Bay (ENM)	5	5	3	Yes	Analysis

#	Games	Start				End
1	7	Tournament PECC King Cars Grand Prix Second Leg 2019				Tournament NMBJCU Trials 3 2019
		date 2019-04-13	rnd 9	type Blitz	result 1	date 2019-05-11	rnd 6	type Standard	result 1
		Opponent Ngxili, P (Phila)				Opponent Crone, C (Callan)
2	5	Tournament NMBCU Trials 1 2019				Tournament 2019 South African Junior Closed Chess Championship
		date 2019-03-09	rnd 4	type Standard	result 1	date 2019-03-18	rnd 3	type Standard	result 1
		Opponent Olsen, C (Christopher)				Opponent Michaels, SA (Sydney)
3	4	Tournament Nelson Mandela Bay Junior Trials 4 2019				Tournament NMBYCC Closed 2019
		date 2019-07-13	rnd 5	type Standard	result 1	date 2019-07-27	rnd 2	type Standard	result 0.5
		Opponent Kivido, Z (Zach)				Opponent Rautenbach, W (Wilhelm)

#	Games	Start				End
1	6	Tournament NMBJCU Trials 3 2019				Tournament NMBJCU Trials 3 2019
		date 2019-05-10	rnd 1	type Standard	result 1	date 2019-05-11	rnd 6	type Standard	result 1
		Opponent Wei, H (Hailan)				Opponent Crone, C (Callan)
2	5	Tournament NMBCU Trials 1 2019				Tournament 2019 South African Junior Closed Chess Championship
		date 2019-03-09	rnd 4	type Standard	result 1	date 2019-03-18	rnd 3	type Standard	result 1
		Opponent Olsen, C (Christopher)				Opponent Michaels, SA (Sydney)
3	4	Tournament Nelson Mandela Bay Junior Trials 4 2019				Tournament NMBYCC Closed 2019
		date 2019-07-13	rnd 5	type Standard	result 1	date 2019-07-27	rnd 2	type Standard	result 0.5
		Opponent Kivido, Z (Zach)				Opponent Rautenbach, W (Wilhelm)

#	Games	Start				End
1	3	Tournament Ulitmate Chess Open 2019				Tournament Ulitmate Chess Open 2019
		date 2019-11-30	rnd 3	type Rapid	result 1	date 2019-11-30	rnd 5	type Rapid	result 1
		Opponent Peter, N (Noah)				Opponent Frosler, J (Jordan)
2	1	Tournament Despatch Open 2018				Tournament Despatch Open 2018
		date 2018-02-17	rnd 5	type Rapid	result 1	date 2018-02-17	rnd 5	type Rapid	result 1
		Opponent Healy, A (Alexander)				Opponent Healy, A (Alexander)
3	1	Tournament Despatch Open 2018				Tournament Despatch Open 2018
		date 2018-02-17	rnd 3	type Rapid	result 1	date 2018-02-17	rnd 3	type Rapid	result 1
		Opponent Kivido, R (Reece)				Opponent Kivido, R (Reece)

#	Games	Start				End
1	2	Tournament PECC King Cars Grand Prix Second Leg 2019				Tournament PECC King Cars Grand Prix Second Leg 2019
		date 2019-04-13	rnd 4	type Blitz	result 1	date 2019-04-13	rnd 5	type Blitz	result 1
		Opponent Shogole, M (Mnandisi)				Opponent Singwani, T (Thabang Musa)
2	1	Tournament Ulitmate Chess Open 2019				Tournament Ulitmate Chess Open 2019
		date 2019-11-30	rnd 6	type Blitz	result 1	date 2019-11-30	rnd 6	type Blitz	result 1
		Opponent Liebenberg, D (Danika)				Opponent Liebenberg, D (Danika)
3	1	Tournament PECC King Cars Grand Prix Second Leg 2019				Tournament PECC King Cars Grand Prix Second Leg 2019
		date 2019-04-13	rnd 9	type Blitz	result 1	date 2019-04-13	rnd 9	type Blitz	result 1
		Opponent Ngxili, P (Phila)				Opponent Ngxili, P (Phila)

#	Games	Start				End
1	5	Tournament NMBCU Trials 1 2019				Tournament 2019 South African Junior Closed Chess Championship
		date 2019-03-09	rnd 4	type Standard	result 1	date 2019-03-18	rnd 3	type Standard	result 1
		Opponent Olsen, C (Christopher)				Opponent Michaels, SA (Sydney)
2	4	Tournament NMB Youth Chess Trial 3 2018				Tournament NMB Youth Chess Trial 3 2018
		date 2018-05-11	rnd 1	type Standard	result 1	date 2018-05-12	rnd 4	type Standard	result 1
		Opponent An, B (Bryant)				Opponent Van Der Merwe, L (Lucas)
3	3	Tournament King Cars Pe Chess Club Grand Prix Leg 1 2020				Tournament 2020 NMBCU Chess Trials 2 2020
		date 2020-02-22	rnd 6	type Standard	result 1	date 2020-03-07	rnd 2	type Standard	result 1
		Opponent Meleni, A (Ayobonga)				Opponent Jordaan, G (Gunther)

#	Games	Start				End
1	5	Tournament NMBCU Trials 1 2019				Tournament 2019 South African Junior Closed Chess Championship
		date 2019-03-09	rnd 4	type Standard	result 1	date 2019-03-18	rnd 3	type Standard	result 1
		Opponent Olsen, C (Christopher)				Opponent Michaels, SA (Sydney)
2	4	Tournament NMB Youth Chess Trial 3 2018				Tournament NMB Youth Chess Trial 3 2018
		date 2018-05-11	rnd 1	type Standard	result 1	date 2018-05-12	rnd 4	type Standard	result 1
		Opponent An, B (Bryant)				Opponent Van Der Merwe, L (Lucas)
3	3	Tournament King Cars Pe Chess Club Grand Prix Leg 1 2020				Tournament 2020 NMBCU Chess Trials 2 2020
		date 2020-02-22	rnd 6	type Standard	result 1	date 2020-03-07	rnd 2	type Standard	result 1
		Opponent Meleni, A (Ayobonga)				Opponent Jordaan, G (Gunther)

#	Games	Start				End
1	3	Tournament Ulitmate Chess Open 2019				Tournament Ulitmate Chess Open 2019
		date 2019-11-30	rnd 3	type Rapid	result 1	date 2019-11-30	rnd 5	type Rapid	result 1
		Opponent Peter, N (Noah)				Opponent Frosler, J (Jordan)
2	1	Tournament Despatch Open 2018				Tournament Despatch Open 2018
		date 2018-02-17	rnd 5	type Rapid	result 1	date 2018-02-17	rnd 5	type Rapid	result 1
		Opponent Healy, A (Alexander)				Opponent Healy, A (Alexander)
3	1	Tournament Despatch Open 2018				Tournament Despatch Open 2018
		date 2018-02-17	rnd 3	type Rapid	result 1	date 2018-02-17	rnd 3	type Rapid	result 1
		Opponent Kivido, R (Reece)				Opponent Kivido, R (Reece)

#	Games	Start				End
1	2	Tournament PECC King Cars Grand Prix Second Leg 2019				Tournament PECC King Cars Grand Prix Second Leg 2019
		date 2019-04-13	rnd 4	type Blitz	result 1	date 2019-04-13	rnd 5	type Blitz	result 1
		Opponent Shogole, M (Mnandisi)				Opponent Singwani, T (Thabang Musa)
2	1	Tournament Ulitmate Chess Open 2019				Tournament Ulitmate Chess Open 2019
		date 2019-11-30	rnd 6	type Blitz	result 1	date 2019-11-30	rnd 6	type Blitz	result 1
		Opponent Liebenberg, D (Danika)				Opponent Liebenberg, D (Danika)
3	1	Tournament PECC King Cars Grand Prix Second Leg 2019				Tournament PECC King Cars Grand Prix Second Leg 2019
		date 2019-04-13	rnd 9	type Blitz	result 1	date 2019-04-13	rnd 9	type Blitz	result 1
		Opponent Ngxili, P (Phila)				Opponent Ngxili, P (Phila)

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	Crone ,C (Callan)	7	3	-60.7	6	3	0	1	0	-425	0	0	0
1	Crone ,C (Callan)	7	1292.3	1231.5	6	1277.2	1292.3	1	844.8	867.3	0	0	0
2	Peter ,N (Noah)	6	1.5	-212.5	5	0.5	-340	1	1	425	0	0	0
2	Peter ,N (Noah)	6	1296.1	1083.6	5	1251.9	956.1	1	1086.7	1721.1	0	0	0
3	Pienaar ,K (Keane)	4	1.5	-106.2	4	1.5	-106.2	0	0	0	0	0	0
3	Pienaar ,K (Keane)	4	1013.8	907.6	4	1000.3	907.6	0	0	0	0	0	0
4	Olsen ,C (Christopher)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
4	Olsen ,C (Christopher)	4	820.2	1032.7	4	826.8	1032.7	0	0	0	0	0	0
5	Baboo ,MS (Muhammad Saeed)	4	1.5	-106.2	4	1.5	-106.2	0	0	0	0	0	0
5	Baboo ,MS (Muhammad Saeed)	4	1024.4	918.2	4	995	918.2	0	0	0	0	0	0
6	Louis ,C (Caitlyn)	4	2.5	106.2	4	2.5	106.2	0	0	0	0	0	0
6	Louis ,C (Caitlyn)	4	1157.9	1264.2	4	1161.3	1264.2	0	0	0	0	0	0
7	Van Der Merwe ,L (Lucas)	4	2	0	3	2	141.7	0	0	0	1	0	-425
7	Van Der Merwe ,L (Lucas)	4	1095.1	1095.1	3	1002	1236.8	0	0	0	1	958.2	670.1
8	Kivido ,Z (Zach)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
8	Kivido ,Z (Zach)	3	1214.2	1355.9	3	1203.2	1355.9	0	0	0	0	0	0
9	Rautenbach ,J (Joshua)	3	3	425	3	3	425	0	0	0	0	0	0
9	Rautenbach ,J (Joshua)	3	1146.3	1571.3	3	1137.7	1571.3	0	0	0	0	0	0
10	Rautenbach ,W (Wilhelm)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
10	Rautenbach ,W (Wilhelm)	3	1120.9	1120.9	3	1113.6	1120.9	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Van Der Merwe, S (Sarah)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms