Chess South Africa Ratings Database

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Personal

Van Der Merwe, W (Willem)

Chess SA id

1120130080

FIDE id

Date of birth

2012-05-02 (U14)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-08-02

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1233.4

Item	Main	Standard	Rapid	Blitz
Rating	1325.9	1323.2	1202	1200
Raw rating	1325.9	1323.2	1202	1200
Weighted rating	1320	1313	1202	1200
Weighted performance	1290.7	1288.9	0	0
Floor	905.2	902.3	702	700
K-factor	32	32	36	36
Min/Max rating change allowed	138.6	139.1	165.3	165.8
Highest rating	1419.8 2024-04-01	1416.9 2024-04-01	1225.6 2023-10-01	1200 2018-10-01
Highest raw rating	1405.2 2024-05-01	1402.3 2024-05-01	1202 2024-02-01	1200 2024-02-01
Highest weighted rating	1405.2 2024-10-01	1402.3 2024-08-01	1202 2025-08-01	1200 2018-10-01
Highest weighted performance	1419.8 2024-04-01	1416.9 2024-04-01	1225.6 2023-10-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1325.9	1323.2	1202	1200
Analysis
Rating	1325.9	1323.2	1202	1200
Raw rating	1325.9	1323.2	1202	1200
Weighted rating	1320	1313	1202
Weighted performance	1290.7	1288.9	0
K-factor	32	32	36	36
Floor	905.2	902.3	702	700
Max/Min rating change allowed	138.6	139.1	165.3	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	1325.9	1323.2	1202	1200
New weighted rating	1320.5	1313.7	1202	1200
New weighted performance	1290.3	1288.4	0	0
Temp new rating	1325.9	1323.2	1202	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1325.9	1323.2	1202	1200
New K-factor	32	32	36	36
New floor	905.2	902.3	702	700

Item	Main	Standard	Rapid
	0	0	0
	30	30	0
	59	59	0
	64	59	5
	51	51	0
	0	0	0
History	214	209	5

Games since
	Main 99	Standard 94		Rapid 5		Blitz 0
Gender	Male
Age group	U14
Region	Sedibeng (GSV)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	2928		986		109
Male	2327		780		88
U14	531		162		24
U14 Male	391		120		18
Standard
	RSA		Province		Region
Overall	2846		1028		113
Male	2272		824		89
U14	525		172		24
U14 Male	384		129		17
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	30	16	53.33	28.3	1299	1327.4
Standard	30	16	53.33	28.3	1299	1327.4
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	214	117	54.67	39.7	1242.3	1282
Standard	209	114.5	54.78	40.7	1241.8	1282.4
Rapid	5	2.5	50	0	1262.3	1262.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1325.9	1323.2	1202	1200
2025-09-01	1325.9	1323.2	1202	1200
2025-08-01	1322.9	1319.5	1202	1200
2025-07-01	1321	1317.2	1202	1200
2025-06-01	1321	1317.2	1202	1200
2025-05-01	1318	1312.2	1202	1200
2025-04-01	1318	1312.2	1202	1200
2025-03-01	1316.5	1309	1202	1200
2025-02-01	1312	1303.6	1202	1200
2025-01-01	1248.8	1229.1	1202	1200
2024-12-01	1281	1262.1	1202	1200
2024-11-01	1281	1262.1	1202	1200
2024-10-01	1333.8	1317.1	1202	1200
2024-09-01	1333.8	1317.1	1202	1200
2024-08-01	1363	1351.7	1202	1200
2024-07-01	1405.2	1402.3	1202	1200
2024-06-01	1405.2	1402.3	1202	1200
2024-08-01	1405.2	1402.3	1202	1200
2024-04-01	1321	1334.6	1202	1200
2024-03-01	1235.2	1234.5	1202	1200
2024-02-01	1235.2	1234.5	1202	1200
2024-01-01	1312.4	1317.3	1202	1200
2023-12-01	1312.4	1317.3	1202	1200
2023-11-01	1312.4	1317.3	1202	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	GDE (D7) Sedibeng East Schools 2025 (U13)	2025-08-02	2025-08-02	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
2	Eureka Chess Open 26 July 2025 (F)	2025-07-26	2025-07-26	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
3	GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U13 Boys)	2025-05-24	2025-05-24	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
4	Hoerskool Drie Riviere Open 08 March 2025 (D)	2025-03-08	2025-03-08	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
5	Laer Volkskool Open 15 Feb 2025 (D)	2025-02-15	2025-02-15	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
6	Afrikaans High School Open 08 Feb 2025 (D)	2025-02-08	2025-02-08	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	GDE (D7) Sedibeng East Schools 2025 (U13)	2025-08-02	2025-08-02	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
2	Eureka Chess Open 26 July 2025 (F)	2025-07-26	2025-07-26	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
3	GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U13 Boys)	2025-05-24	2025-05-24	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
4	Hoerskool Drie Riviere Open 08 March 2025 (D)	2025-03-08	2025-03-08	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
5	Laer Volkskool Open 15 Feb 2025 (D)	2025-02-15	2025-02-15	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
6	Afrikaans High School Open 08 Feb 2025 (D)	2025-02-08	2025-02-08	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
7	Gauteng Inter-Region at UJ 2024 (U14 Candidates)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	4	1	Yes	Analysis
8	Fonteine Open 2024 (D)	2024-10-19	2024-10-19	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
9	NWU Vaal Chess Open 12 Oct 2024 (D)	2024-10-12	2024-10-12	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
10	Gauteng Top Schools 2024 (U13 Open)	2024-10-04	2024-10-04	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
11	Sedibeng East D7 Teams Trials 2024 (U13)	2024-08-03	2024-08-03	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
12	Eureka Open 27 July 2024 (F)	2024-07-27	2024-07-27	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
13	Hoerskool Overvaal Chess Open 2024 (D)	2024-04-20	2024-04-20	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
14	Vaalpark Primary Chess Open 2024 (D)	2024-04-13	2024-04-13	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
15	Valia's Open 2024 (E)	2024-03-02	2024-03-02	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
16	NG Kerk Vanderbijlpark Suid 2024 (D)	2024-02-24	2024-02-24	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
17	Laerskool Midvaal Chess Open Section 2024 (D)	2024-02-10	2024-02-10	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
18	2024 Gauteng Inter-Region Chess Championship (U12A)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	5	0	Yes	Analysis
19	NWU Vaal Open 2023 (D)	2023-10-14	2023-10-14	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
20	Dr Pieter Hangelbroek Rapid 2023 (C)	2023-10-28	2023-10-28	Rapid	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
21	Fonteine Chess Open 2023 (E)	2023-09-02	2023-09-02	Standard	Sedibeng (GSV)	5	4	1.5	Yes	Analysis
22	2023 Gauteng Top Schools (U11 Mixed)	2023-08-18	2023-08-18	Standard	West Rand (GWR)	5	5	2	Yes	Analysis
23	Gauteng D7 Teams 2023 (U11)	2023-08-12	2023-08-12	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
24	Overvaal Ope Jul 2023 (D)	2023-07-22	2023-07-22	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
25	Eureka Open 2023 (F)	2023-07-29	2023-07-29	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
26	Valia's Chess Tournament 2023 (D)	2023-05-06	2023-05-06	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
27	Gauteng Schools D7 2023 (U11 Boys)	2023-05-20	2023-05-20	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
28	Overvaal Open 2023 (D)	2023-04-15	2023-04-15	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
29	Hoerskool Drie Riviere Open 2023 (D)	2023-03-11	2023-03-11	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
30	AG Visser Open 2023 (C)	2023-02-18	2023-02-18	Standard	Sedibeng (GSV)	5	5	1.5	Yes	Analysis
31	Laerkool Midvaal Chess Open 2023 (D)	2023-01-28	2023-01-28	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
32	Dr Peter Hangelbroek Open 2022 (E)	2022-10-29	2022-10-29	Standard	Sedibeng (GSV)	5	2	0.5	Yes	Analysis
33	Overvaal Open 2022 (D)	2022-08-06	2022-08-06	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
34	D7 Teams 2022 (U9+U11 Mixed)	2022-08-13	2022-08-13	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
35	2022 Gauteng Schools Team Championships (U11 Open)	2022-08-27	2022-08-27	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
36	Eureka Open 2022 (G+H)	2022-07-30	2022-07-30	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
37	Hoerskool Overvaal 2022 (D)	2022-06-11	2022-06-11	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
38	Gaueng Schools D7 2022 (U11 Boys)	2022-06-04	2022-06-04	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
39	2022 Gauteng Schools Individual Chess Championship (U11 Boys)	2022-06-18	2022-06-18	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
40	LS Vryheidsmonument Chess Open 2022 (D)	2022-05-07	2022-05-07	Standard	Sedibeng (GSV)	5	4	2	Yes	Analysis
41	Lux Deo NG Kerk Chess Open 2022 (D)	2022-04-09	2022-04-09	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
42	Midvaal Ope 2022 (D)	2022-01-29	2022-01-29	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
43	Hoerskool Drie Riviere 2020 (F)	2020-03-07	2020-03-07	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
44	Midvaal Chess Open 2020 (D)	2020-01-25	2020-01-25	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis

#	Games	Start				End
1	7	Tournament D7 Teams 2022				Tournament 2022 Gauteng Schools Team Championships
		date 2022-08-13	rnd 1	type Standard	result 1	date 2022-08-27	rnd 2	type Standard	result 1
		Opponent Dlamini, L (Lucky)				Opponent Saeed, Z (Zanairah)
2	6	Tournament Eureka Open 2023				Tournament Gauteng D7 Teams 2023
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-08-12	rnd 5	type Standard	result 1
		Opponent Tolmay, W (Walroux)				Opponent Pereira, R (Raychel)
3	5	Tournament Eureka Open 2022				Tournament Overvaal Open 2022
		date 2022-07-30	rnd 4	type Standard	result 1	date 2022-08-06	rnd 3	type Standard	result 1
		Opponent Viljoen, C (Chene)				Opponent Viljoen, C (Chene)

#	Games	Start				End
1	7	Tournament D7 Teams 2022				Tournament 2022 Gauteng Schools Team Championships
		date 2022-08-13	rnd 1	type Standard	result 1	date 2022-08-27	rnd 2	type Standard	result 1
		Opponent Dlamini, L (Lucky)				Opponent Saeed, Z (Zanairah)
2	6	Tournament Eureka Open 2023				Tournament Gauteng D7 Teams 2023
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-08-12	rnd 5	type Standard	result 1
		Opponent Tolmay, W (Walroux)				Opponent Pereira, R (Raychel)
3	5	Tournament Eureka Open 2022				Tournament Overvaal Open 2022
		date 2022-07-30	rnd 4	type Standard	result 1	date 2022-08-06	rnd 3	type Standard	result 1
		Opponent Viljoen, C (Chene)				Opponent Viljoen, C (Chene)

#	Games	Start				End
1	2	Tournament Dr Pieter Hangelbroek Rapid 2023				Tournament Dr Pieter Hangelbroek Rapid 2023
		date 2023-10-28	rnd 1	type Rapid	result 0.5	date 2023-10-28	rnd 2	type Rapid	result 1
		Opponent De Jager, K (Kobus)				Opponent Booysen, Z (Zian)
2	1	Tournament Dr Pieter Hangelbroek Rapid 2023				Tournament Dr Pieter Hangelbroek Rapid 2023
		date 2023-10-28	rnd 4	type Rapid	result 1	date 2023-10-28	rnd 4	type Rapid	result 1
		Opponent Gielink, B (Benjamin)				Opponent Gielink, B (Benjamin)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament D7 Teams 2022				Tournament 2022 Gauteng Schools Team Championships
		date 2022-08-13	rnd 1	type Standard	result 1	date 2022-08-27	rnd 2	type Standard	result 1
		Opponent Dlamini, L (Lucky)				Opponent Saeed, Z (Zanairah)
2	6	Tournament Eureka Open 2023				Tournament Gauteng D7 Teams 2023
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-08-12	rnd 5	type Standard	result 1
		Opponent Tolmay, W (Walroux)				Opponent Pereira, R (Raychel)
3	5	Tournament Eureka Open 2022				Tournament Overvaal Open 2022
		date 2022-07-30	rnd 4	type Standard	result 1	date 2022-08-06	rnd 3	type Standard	result 1
		Opponent Viljoen, C (Chene)				Opponent Viljoen, C (Chene)

#	Games	Start				End
1	7	Tournament D7 Teams 2022				Tournament 2022 Gauteng Schools Team Championships
		date 2022-08-13	rnd 1	type Standard	result 1	date 2022-08-27	rnd 2	type Standard	result 1
		Opponent Dlamini, L (Lucky)				Opponent Saeed, Z (Zanairah)
2	6	Tournament Eureka Open 2023				Tournament Gauteng D7 Teams 2023
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-08-12	rnd 5	type Standard	result 1
		Opponent Tolmay, W (Walroux)				Opponent Pereira, R (Raychel)
3	5	Tournament Eureka Open 2022				Tournament Overvaal Open 2022
		date 2022-07-30	rnd 4	type Standard	result 1	date 2022-08-06	rnd 3	type Standard	result 1
		Opponent Viljoen, C (Chene)				Opponent Viljoen, C (Chene)

#	Games	Start				End
1	1	Tournament Dr Pieter Hangelbroek Rapid 2023				Tournament Dr Pieter Hangelbroek Rapid 2023
		date 2023-10-28	rnd 4	type Rapid	result 1	date 2023-10-28	rnd 4	type Rapid	result 1
		Opponent Gielink, B (Benjamin)				Opponent Gielink, B (Benjamin)
2	1	Tournament Dr Pieter Hangelbroek Rapid 2023				Tournament Dr Pieter Hangelbroek Rapid 2023
		date 2023-10-28	rnd 2	type Rapid	result 1	date 2023-10-28	rnd 2	type Rapid	result 1
		Opponent Booysen, Z (Zian)				Opponent Booysen, Z (Zian)

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	Tolmay ,W (Walroux)	5	1.5	-170	5	1.5	-170	0	0	0	0	0	0
1	Tolmay ,W (Walroux)	5	1334.8	1164.8	5	1330.3	1164.8	0	0	0	0	0	0
2	Myburgh ,V (Vaughn)	5	1	-255	5	1	-255	0	0	0	0	0	0
2	Myburgh ,V (Vaughn)	5	1302.9	1047.9	5	1302.6	1047.9	0	0	0	0	0	0
3	Viljoen ,C (Chene)	5	4.5	340	5	4.5	340	0	0	0	0	0	0
3	Viljoen ,C (Chene)	5	1160.7	1500.7	5	1152.9	1500.7	0	0	0	0	0	0
4	Nagel ,D (Divan)	5	1	-255	5	1	-255	0	0	0	0	0	0
4	Nagel ,D (Divan)	5	1338.1	1083.1	5	1335.4	1083.1	0	0	0	0	0	0
5	Bezuidenhoudt ,M (Marlo)	5	2.5	0	4	2.5	106.2	1	0	-425	0	0	0
5	Bezuidenhoudt ,M (Marlo)	5	1305.5	1305.5	4	1295.1	1411.7	1	1200	880.5	0	0	0
6	Smith ,MI (Melea Ine)	4	3.5	318.8	4	3.5	318.8	0	0	0	0	0	0
6	Smith ,MI (Melea Ine)	4	1147.9	1466.7	4	1131.8	1466.7	0	0	0	0	0	0
7	Brand ,H (Henko)	4	1.5	-106.2	4	1.5	-106.2	0	0	0	0	0	0
7	Brand ,H (Henko)	4	1442.6	1336.3	4	1438.9	1336.3	0	0	0	0	0	0
8	Viviers ,W (Wiaan)	4	1	-212.5	4	1	-212.5	0	0	0	0	0	0
8	Viviers ,W (Wiaan)	4	1212	999.5	4	1209.3	999.5	0	0	0	0	0	0
9	Sampson ,C (Cadon)	4	1	-212.5	4	1	-212.5	0	0	0	0	0	0
9	Sampson ,C (Cadon)	4	1228.8	1016.3	4	1227.2	1016.3	0	0	0	0	0	0
10	Wagner ,E (Elona)	4	2	0	4	2	0	0	0	0	0	0	0
10	Wagner ,E (Elona)	4	1355.9	1355.9	4	1361.2	1355.9	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Van Der Merwe, W (Willem)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms