Chess South Africa Ratings Database

PLAYER PAGE

Personal

Van Der Merwe, L (Logan)

Chess SA id

1090101491

FIDE id

Date of birth

2009-01-27 (U18)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1227.8	1167.9	1320	1200
Raw rating	1208.1	1160.4	1320	1200
Weighted rating	1227.8	1167.9	1320	1200
Weighted performance	827.3	806.7	0	0
Floor	754.1	758.4	820	700
K-factor	36	36	36	36
Min/Max rating change allowed	163.9	175.4	139.8	165.8
Highest rating	1460.5 2018-05-01	1460.5 2018-05-01	1625 2020-02-01	1200 2018-10-01
Highest raw rating	1254.1 2025-07-01	1258.4 2018-06-01	1320 2024-02-01	1200 2024-02-01
Highest weighted rating	1254.1 2024-02-01	1258.4 2018-06-01	1320 2024-02-01	1200 2018-10-01
Highest weighted performance	1460.5 2018-05-01	1460.5 2018-05-01	1625 2020-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-1.6	-0.4	0	0
New rating	1226.1	1167.5	1320	1200
Analysis
Rating	1227.8	1167.9	1320	1200
Raw rating	1208.1	1160.4	1320	1200
Weighted rating	1227.8	1167.9	1320
Weighted performance	827.3	806.7	0
K-factor	36	36	36	36
Floor	754.1	758.4	820	700
Max/Min rating change allowed	163.9	175.4	139.8	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	1208.1	1160.4	1320	1200
New weighted rating	1226.1	1167.5	1320	1200
New weighted performance	819.9	799.5	0	0
Temp new rating	1226.1	1167.5	1320	1200
Temp new rating +/-	-1.6	-0.4	0	0
Final new rating +/-	-1.6	-0.4	0	0
New rating	1226.1	1167.5	1320	1200
New K-factor	36	36	36	36
New floor	754.1	758.4	820	700

Item	Main	Standard	Rapid
	0	0	0
	9	9	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	80	74	6

Games since
	Main 9	Standard 9		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
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	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
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	9	4	44.44	-47.2	1227.4	1180.2
Standard	9	4	44.44	-47.2	1227.4	1180.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	80	45	56.25	53.1	1153.1	1206.2
Standard	74	39	52.7	23	1157.1	1180.1
Rapid	6	6	100	425	1103.3	1528.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1208.1	1160.4	1320	1200
2025-09-30	1208.1	1160.4	1320	1200
2025-09-01	1208.1	1160.4	1320	1200
2025-08-01	1254.1	1205	1320	1200
2025-07-01	1254.1	1205	1320	1200
2025-06-01	1229.2	1162.7	1320	1200
2025-05-01	1229.2	1162.7	1320	1200
2025-04-01	1229.2	1162.7	1320	1200
2025-03-01	1229.2	1162.7	1320	1200
2025-02-01	1229.2	1162.7	1320	1200
2025-01-01	1229.2	1162.7	1320	1200
2024-12-01	1229.2	1162.7	1320	1200
2024-11-01	1229.2	1162.7	1320	1200
2024-10-01	1229.2	1162.7	1320	1200
2024-09-01	1229.2	1162.7	1320	1200
2024-08-01	1229.2	1162.7	1320	1200
2024-07-01	1229.2	1162.7	1320	1200
2024-09-01	1229.2	1162.7	1320	1200
2024-05-01	1229.2	1162.7	1320	1200
2024-04-01	1229.2	1162.7	1320	1200
2024-03-01	1229.2	1162.7	1320	1200
2024-02-01	1229.2	1162.7	1320	1200
2024-01-01	1229.2	1162.7	1320	1200
2023-12-01	1229.2	1162.7	1320	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	D6 High School Teams Final 2025 (U17)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
2	D6 HS Teams 2025 (U17)	2025-05-31	2025-05-31	Standard	Ekurhuleni (GE)	5	4	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	D6 High School Teams Final 2025 (U17)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
2	D6 HS Teams 2025 (U17)	2025-05-31	2025-05-31	Standard	Ekurhuleni (GE)	5	4	3	Yes	Analysis
3	Laerskool Oosterkruin 2020 (U11)	2020-02-01	2020-02-01	Rapid	Ekurhuleni (GE)	6	6	6	Yes	Analysis
4	2019 Wild Card Chess Championship (U12 Open)	2020-01-09	2020-01-12	Standard	4 Knights (4K)	7	5	0	Yes	Analysis
5	2019 South African Junior Team Championships (U12E)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	6	Yes	Analysis
6	Boksburg Chess Club Open 2019 (C)	2019-07-13	2019-07-13	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
7	2019 RMS Laerskole (U11)	2019-06-01	2019-06-01	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
8	Ekurhuleni South School Chess 2019 (U11 Boys)	2019-05-11	2019-05-11	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
9	Primrose Chess Club Open 2019 (C)	2019-04-13	2019-04-13	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
10	Ekurhuleni Trials 2 2019 (U12)	2019-04-27	2019-04-27	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
11	Ekurhuleni Trials 1 2019 (U12)	2019-03-09	2019-03-09	Standard	Ekurhuleni (GE)	5	5	3.5	Yes	Analysis
12	Springs Chess Club Open 2019 (C)	2019-02-09	2019-02-09	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis
13	Boksburg Open 2019 (C)	2019-01-19	2019-01-19	Standard	Ekurhuleni (GE)	5	5	3	Yes	Analysis
14	Ekurhuleni North District Schools Final 2018 (U9)	2018-08-04	2018-08-04	Standard	Ekurhuleni (GE)	5	4	2	Yes	Analysis
15	Ekurhuleni Trials 3 2018 (U10)	2018-06-16	2018-06-16	Standard	Ekurhuleni (GE)	5	4	2	Yes	Analysis
16	Ekurhuleni North Schools Individuals 2018	2018-05-12	2018-05-12	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis

#	Games	Start				End
1	7	Tournament Laerskool Oosterkruin 2020				Tournament D6 HS Teams 2025
		date 2020-02-01	rnd 1	type Rapid	result 1	date 2025-05-31	rnd 2	type Standard	result 1
		Opponent Barnard, H (Hayden)				Opponent Ngubane, S (Siyaphila)
2	7	Tournament Boksburg Chess Club Open 2019				Tournament 2019 South African Junior Team Championships
		date 2019-07-13	rnd 5	type Standard	result 1	date 2020-01-07	rnd 6	type Standard	result 1
		Opponent De Lange, C (Charend)				Opponent Khechane, M (Mohale)
3	4	Tournament 2019 RMS Laerskole				Tournament 2019 RMS Laerskole
		date 2019-06-01	rnd 1	type Standard	result 1	date 2019-06-01	rnd 4	type Standard	result 1
		Opponent El Qouar, T (Tamir)				Opponent Potgieter, A (Albert)

#	Games	Start				End
1	7	Tournament Boksburg Chess Club Open 2019				Tournament 2019 South African Junior Team Championships
		date 2019-07-13	rnd 5	type Standard	result 1	date 2020-01-07	rnd 6	type Standard	result 1
		Opponent De Lange, C (Charend)				Opponent Khechane, M (Mohale)
2	4	Tournament 2019 RMS Laerskole				Tournament 2019 RMS Laerskole
		date 2019-06-01	rnd 1	type Standard	result 1	date 2019-06-01	rnd 4	type Standard	result 1
		Opponent El Qouar, T (Tamir)				Opponent Potgieter, A (Albert)
3	4	Tournament Ekurhuleni Trials 1 2019				Tournament Ekurhuleni Trials 1 2019
		date 2019-03-09	rnd 2	type Standard	result 1	date 2019-03-09	rnd 5	type Standard	result 1
		Opponent Madlala, A (Alwande)				Opponent Deans, J (Jarred)

#	Games	Start				End
1	6	Tournament Laerskool Oosterkruin 2020				Tournament Laerskool Oosterkruin 2020
		date 2020-02-01	rnd 1	type Rapid	result 1	date 2020-02-01	rnd 6	type Rapid	result 1
		Opponent Barnard, H (Hayden)				Opponent De Lange, N (Nadia)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament Laerskool Oosterkruin 2020				Tournament D6 HS Teams 2025
		date 2020-02-01	rnd 1	type Rapid	result 1	date 2025-05-31	rnd 2	type Standard	result 1
		Opponent Barnard, H (Hayden)				Opponent Ngubane, S (Siyaphila)
2	7	Tournament Boksburg Chess Club Open 2019				Tournament 2019 South African Junior Team Championships
		date 2019-07-13	rnd 5	type Standard	result 1	date 2020-01-07	rnd 6	type Standard	result 1
		Opponent De Lange, C (Charend)				Opponent Khechane, M (Mohale)
3	4	Tournament 2019 RMS Laerskole				Tournament 2019 RMS Laerskole
		date 2019-06-01	rnd 1	type Standard	result 1	date 2019-06-01	rnd 4	type Standard	result 1
		Opponent El Qouar, T (Tamir)				Opponent Potgieter, A (Albert)

#	Games	Start				End
1	7	Tournament Boksburg Chess Club Open 2019				Tournament 2019 South African Junior Team Championships
		date 2019-07-13	rnd 5	type Standard	result 1	date 2020-01-07	rnd 6	type Standard	result 1
		Opponent De Lange, C (Charend)				Opponent Khechane, M (Mohale)
2	4	Tournament 2019 RMS Laerskole				Tournament 2019 RMS Laerskole
		date 2019-06-01	rnd 1	type Standard	result 1	date 2019-06-01	rnd 4	type Standard	result 1
		Opponent El Qouar, T (Tamir)				Opponent Potgieter, A (Albert)
3	3	Tournament D6 HS Teams 2025				Tournament D6 High School Teams Final 2025
		date 2025-05-31	rnd 4	type Standard	result 1	date 2025-08-16	rnd 1	type Standard	result 1
		Opponent Hlatshwayo, B (Busisiwe)				Opponent Denysschen, K (Keagan)

#	Games	Start				End
1	6	Tournament Laerskool Oosterkruin 2020				Tournament Laerskool Oosterkruin 2020
		date 2020-02-01	rnd 1	type Rapid	result 1	date 2020-02-01	rnd 6	type Rapid	result 1
		Opponent Barnard, H (Hayden)				Opponent De Lange, N (Nadia)

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	Mkubalo ,O (Olwethu)	2	2	425	2	2	425	0	0	0	0	0	0
1	Mkubalo ,O (Olwethu)	2	1200	1625	2	1200	1625	0	0	0	0	0	0
2	Mavuso ,S (Sibusiso)	2	0	-425	2	0	-425	0	0	0	0	0	0
2	Mavuso ,S (Sibusiso)	2	1233.2	808.2	2	1239.2	808.2	0	0	0	0	0	0
3	King ,D (Danielle)	2	2	425	2	2	425	0	0	0	0	0	0
3	King ,D (Danielle)	2	1166.7	1591.7	2	1159.6	1591.7	0	0	0	0	0	0
4	Janse Van Vuuren ,A (Alexander)	2	2	425	1	1	425	1	1	425	0	0	0
4	Janse Van Vuuren ,A (Alexander)	2	1087.2	1512.2	1	1200	1512.2	1	1200	1512.2	0	0	0
5	De Lange ,N (Nadia)	2	2	425	1	1	425	1	1	425	0	0	0
5	De Lange ,N (Nadia)	2	1005.2	1430.2	1	953.3	1430.2	1	1200	1430.2	0	0	0
6	Viljoen ,H (Henning)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Viljoen ,H (Henning)	1	1182.3	757.3	1	1173	757.3	0	0	0	0	0	0
7	Cronje ,NM (Nicolaas Mattheus)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Cronje ,NM (Nicolaas Mattheus)	1	1242.6	817.6	1	1232.2	817.6	0	0	0	0	0	0
8	Naidoo ,K (Kajol)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Naidoo ,K (Kajol)	1	1327	902	1	1318	902	0	0	0	0	0	0
9	Rossouw ,A (Alicia)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Rossouw ,A (Alicia)	1	1137	712	1	1114.6	712	0	0	0	0	0	0
10	Khechane ,M (Mohale)	1	1	425	1	1	425	0	0	0	0	0	0
10	Khechane ,M (Mohale)	1	1166.1	1591.1	1	1162	1591.1	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, L (Logan)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms