Chess South Africa Ratings Database

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Personal

Byliefeldt, M (Mienke)

Chess SA id

211093275

FIDE id

Date of birth

2011-04-18 (U16)

Gender

Female

Region

Bojanala Platina (NBR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-02

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1243.6	1178.2	1265.8	1200
Raw rating	1243.6	1178.2	1265.8	1200
Weighted rating	1211.5	1177.3	1226.5	1200
Weighted performance	1061.4	901.2	0	0
Floor	809.7	809.9	765.8	700
K-factor	36	36	36	36
Min/Max rating change allowed	155.8	171.1	151	165.8
Highest rating	1323.4 2022-09-01	1323.6 2022-09-01	1277.7 2023-08-01	1200 2018-10-01
Highest raw rating	1309.7 2022-10-01	1309.9 2022-10-01	1265.8 2025-09-01	1200 2024-03-01
Highest weighted rating	1309.7 2021-06-01	1309.9 2018-02-01	1218.9 2025-09-01	1200 2018-10-01
Highest weighted performance	1323.4 2022-09-01	1323.6 2022-09-01	1277.7 2023-08-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1243.6	1178.2	1265.8	1200
Analysis
Rating	1243.6	1178.2	1265.8	1200
Raw rating	1243.6	1178.2	1265.8	1200
Weighted rating	1211.5	1177.3	1226.5
Weighted performance	1061.4	901.2	0
K-factor	36	36	36	36
Floor	809.7	809.9	765.8	700
Max/Min rating change allowed	155.8	171.1	151	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	1243.6	1178.2	1265.8	1200
New weighted rating	1214.3	1177.4	1230.1	1200
New weighted performance	1054.2	894.3	0	0
Temp new rating	1243.6	1178.2	1265.8	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1243.6	1178.2	1265.8	1200
New K-factor	36	36	36	36
New floor	809.7	809.9	765.8	700

Item	Main	Standard	Rapid
	0	0	0
	5	0	5
	10	10	0
	25	20	5
	46	46	0
	14	14	0
History	232	222	10

Games since
	Main 15	Standard 10		Rapid 5		Blitz 0
Gender	Female
Age group	U16
Region	Bojanala Platina (NBR)
Province	Northwest (NW)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U16	-1		-1		-1
U16 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	5	4	80	255	1211.5	1466.5
Standard	0	0	0	0	0	0
Rapid	5	4	80	255	1211.5	1466.5
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	229	96	41.92	-68.7	1182.3	1113.6
Standard	219	89	40.64	-79.6	1179.3	1099.8
Rapid	10	7	70	170	1246.9	1416.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1243.6	1178.2	1265.8	1200
2025-09-30	1243.6	1178.2	1265.8	1200
2025-09-01	1243.6	1178.2	1265.8	1200
2025-08-01	1203.5	1178.2	1214.8	1200
2025-07-01	1203.5	1178.2	1214.8	1200
2025-06-01	1203.5	1178.2	1214.8	1200
2025-05-01	1203.5	1178.2	1214.8	1200
2025-04-01	1203.5	1178.2	1214.8	1200
2025-03-01	1203.5	1178.2	1214.8	1200
2025-02-01	1203.3	1178.2	1214.8	1200
2025-01-01	1199.8	1178	1214.8	1200
2024-12-01	1199.8	1178	1214.8	1200
2024-11-01	1199.8	1178	1214.8	1200
2024-10-01	1199.8	1178	1214.8	1200
2024-09-01	1199.8	1178	1214.8	1200
2024-08-01	1199.8	1178	1214.8	1200
2024-07-01	1199.8	1178	1214.8	1200
2024-09-01	1199.8	1178	1214.8	1200
2024-05-01	1180.7	1145.2	1214.8	1200
2024-04-01	1180.7	1145.2	1214.8	1200
2024-03-01	1222.2	1190.2	1214.8	1200
2024-02-01	1222.2	1190.2	1214.8	1200
2024-01-01	1222.2	1190.2	1214.8	1200
2023-12-01	1222.2	1190.2	1214.8	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	Bojanala's Clash Of Schools 2025 (Championship Girls)	2025-08-02	2025-08-02	Rapid	Bojanala Platina (NBR)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Bojanala's Clash Of Schools 2025 (Championship Girls)	2025-08-02	2025-08-02	Rapid	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
2	Spartan Bishops Chess Championships 2024 (Knights)	2024-05-04	2024-05-05	Standard	Bojanala Platina (NBR)	5	5	2.5	Yes	Analysis
3	Bojanala Silwerrand's Rating Implosion 2024 (Bishops)	2024-03-16	2024-03-16	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
4	Bojanala's Spring Cleaning 2023 (Knights)	2023-08-26	2023-08-26	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
5	Bojanala School League 2023 (Primary School Open)	2023-08-19	2023-08-19	Rapid	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
6	Bojanala's FIDE in the Sparkling Waters 2023 (Rooks)	2023-07-28	2023-07-30	Standard	Bojanala Platina (NBR)	6	6	3	Yes	Analysis
7	Olienpark - 2nd One for the Ages 2023 (U14)	2023-05-13	2023-05-13	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
8	Harties Wolf Pack 2023 (Knights)	2023-01-21	2023-01-21	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
9	2022 South African Junior Team Chess Championships (U12 Open)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	7	3	Yes	Analysis
10	West Rand vs Bojanala 2022 (U12B)	2022-11-05	2022-11-05	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
11	FIDE at The King`s Gate 2.0 2022 (C)	2022-10-22	2022-10-22	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
12	Bojanala SAJCC Trials 2022 (U12)	2022-09-23	2022-09-23	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
13	Bojanala Chess Federation Wildcards 2022 (U12)	2022-08-20	2022-08-20	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
14	2nd One For The Ages 2022 (U12)	2022-07-30	2022-07-30	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
15	Thomas Lechelele NW Open 2022 (C)	2022-05-14	2022-05-14	Standard	Ngaka Modiri Molema (NNM)	5	5	3	Yes	Analysis
16	RHS Know Thyself 2022 (C)	2022-04-23	2022-04-23	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
17	Fide At The King`s Gate 2022 (C)	2022-02-26	2022-02-26	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
18	Bojanala SAJCC Trials - Session 2 of 3 2021 (C)	2021-11-13	2021-11-13	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
19	Bojanala SAJCC Trials - Session 1 of 3 2021 (D)	2021-11-06	2021-11-06	Standard	Bojanala Platina (NBR)	5	4	1.5	Yes	Analysis
20	2021 Chris Greyling Open Tournament (D)	2021-05-08	2021-05-08	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
21	Laerskool Proteapark 2020 (D)	2020-02-29	2020-02-29	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
22	Lebone II 2020 (U10)	2020-02-15	2020-02-15	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
23	2020 Constantiapark Open Chess Tournament (E)	2020-02-08	2020-02-08	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
24	2019 South African Junior Team Championships (U10D)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	6	5	Yes	Analysis
25	Selly Park 2019 (E)	2019-10-05	2019-10-05	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
26	NW Open 2019 (U10)	2019-10-12	2019-10-12	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
27	Inter Region 2019 (U10 Girls)	2019-10-19	2019-10-19	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
28	2019 Menlo Open (E)	2019-07-13	2019-07-13	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
29	JNW Club - Helpmekaar Kollege Open 2019 (E)	2019-07-06	2019-07-06	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
30	Laerskool Proteapark 2019 (D)	2019-05-18	2019-05-18	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
31	Laerskool Olienpark 2019 (U10)	2019-04-06	2019-04-06	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
32	2019 South African Junior Closed Chess Championship (U8 Girls)	2019-03-17	2019-03-22	Standard	Chess South Africa (CSA)	9	9	0	Yes	Analysis
33	Rustenburg Noord Primary Tournament 2019 (U10)	2019-02-09	2019-02-09	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
34	Laerskool Vastrap Tournament 2019 (E)	2019-02-23	2019-02-23	Standard	Bojanala Platina (NBR)	5	5	1.5	Yes	Analysis
35	Fields College Open 2019 (U10)	2019-02-02	2019-02-02	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
36	Hoerskool Brits Tournament 2019 (U10)	2019-02-09	2019-02-09	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
37	2018 Tshwane Inter Region (U8C)	2018-12-01	2018-12-01	Standard	Cape Town (WCT)	6	5	1	Yes	Analysis
38	South African Junior Team Championships 2018 (U8B+U8 Girls)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	2.5	Yes	Analysis
39	Lebone II Chess 2018 (U8)	2018-09-01	2018-09-01	Standard	Cape Town (WCT)	5	5	2	Yes	Analysis
40	Bojanala Regionals 2018 (U8)	2018-09-15	2018-09-15	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
41	Laerskool Brits Tournament 2018 (U8)	2018-08-04	2018-08-04	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
42	Inter Regional 2018 (U8 Individual)	2018-05-04	2018-05-05	Standard	Frances Baard (NCF)	5	5	0.5	Yes	Analysis
43	Hoerskool Brits 2018 (U8)	2018-03-17	2018-03-17	Standard	Bojanala Platina (NBR)	5	5	3.5	Yes	Analysis
44	Laerskool Vastrap 2018 (U8)	2018-02-03	2018-02-03	Standard	Bojanala Platina (NBR)	5	4	1.5	Yes	Analysis
45	Laerskool Rustenburg Noord Primary 2018 (E)	2018-02-24	2018-02-24	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis

#	Games	Start				End
1	6	Tournament Spartan Bishops Chess Championships 2024				Tournament Bojanala's Clash Of Schools 2025
		date 2024-05-04	rnd 3	type Standard	result 1	date 2025-08-02	rnd 3	type Rapid	result 1
		Opponent Nonyane, N (Ndumiso)				Opponent Khunou, K (Kabo)
2	4	Tournament Bojanala's FIDE in the Sparkling Waters 2023				Tournament Bojanala School League 2023
		date 2023-07-30	rnd 5	type Standard	result 1	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Mtseni, S (Simphiwe)
3	4	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-04	rnd 1	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent Johannes, R (Relecia)				Opponent Baloi, T (Thato)

#	Games	Start				End
1	4	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-04	rnd 1	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent Johannes, R (Relecia)				Opponent Baloi, T (Thato)
2	3	Tournament Spartan Bishops Chess Championships 2024				Tournament Spartan Bishops Chess Championships 2024
		date 2024-05-04	rnd 3	type Standard	result 1	date 2024-05-05	rnd 5	type Standard	result 1
		Opponent Nonyane, N (Ndumiso)				Opponent Lebajoa, L (Lesli)
3	3	Tournament Bojanala SAJCC Trials 2022				Tournament Bojanala SAJCC Trials 2022
		date 2022-09-23	rnd 1	type Standard	result 1	date 2022-09-23	rnd 3	type Standard	result 1
		Opponent Annandale, V (Vaugan)				Opponent Grobler, R (Rowan)

#	Games	Start				End
1	3	Tournament Bojanala's Clash Of Schools 2025				Tournament Bojanala's Clash Of Schools 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-02	rnd 3	type Rapid	result 1
		Opponent Pilane, R (Reaobaka)				Opponent Khunou, K (Kabo)
2	2	Tournament Bojanala School League 2023				Tournament Bojanala School League 2023
		date 2023-08-19	rnd 1	type Rapid	result 1	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Naidoo, D (Danika)				Opponent Mtseni, S (Simphiwe)
3	1	Tournament Bojanala's Clash Of Schools 2025				Tournament Bojanala's Clash Of Schools 2025
		date 2025-08-02	rnd 5	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Monageng, N (Naledi)				Opponent Monageng, N (Naledi)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Spartan Bishops Chess Championships 2024				Tournament Bojanala's Clash Of Schools 2025
		date 2024-05-05	rnd 5	type Standard	result 1	date 2025-08-02	rnd 3	type Rapid	result 1
		Opponent Lebajoa, L (Lesli)				Opponent Khunou, K (Kabo)
2	4	Tournament Bojanala's FIDE in the Sparkling Waters 2023				Tournament Bojanala School League 2023
		date 2023-07-30	rnd 5	type Standard	result 1	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Mtseni, S (Simphiwe)
3	4	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-04	rnd 1	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent Johannes, R (Relecia)				Opponent Baloi, T (Thato)

#	Games	Start				End
1	4	Tournament 2019 South African Junior Team Championships				Tournament 2019 South African Junior Team Championships
		date 2020-01-04	rnd 1	type Standard	result 1	date 2020-01-06	rnd 5	type Standard	result 1
		Opponent Johannes, R (Relecia)				Opponent Baloi, T (Thato)
2	3	Tournament Bojanala SAJCC Trials 2022				Tournament Bojanala SAJCC Trials 2022
		date 2022-09-23	rnd 1	type Standard	result 1	date 2022-09-23	rnd 3	type Standard	result 1
		Opponent Annandale, V (Vaugan)				Opponent Grobler, R (Rowan)
3	3	Tournament Bojanala Chess Federation Wildcards 2022				Tournament Bojanala Chess Federation Wildcards 2022
		date 2022-08-20	rnd 1	type Standard	result 1	date 2022-08-20	rnd 3	type Standard	result 1
		Opponent Maema, E (Ethan)				Opponent Van Der Berg, KW (Kai)

#	Games	Start				End
1	3	Tournament Bojanala's Clash Of Schools 2025				Tournament Bojanala's Clash Of Schools 2025
		date 2025-08-02	rnd 1	type Rapid	result 1	date 2025-08-02	rnd 3	type Rapid	result 1
		Opponent Pilane, R (Reaobaka)				Opponent Khunou, K (Kabo)
2	2	Tournament Bojanala School League 2023				Tournament Bojanala School League 2023
		date 2023-08-19	rnd 1	type Rapid	result 1	date 2023-08-19	rnd 2	type Rapid	result 1
		Opponent Naidoo, D (Danika)				Opponent Mtseni, S (Simphiwe)
3	1	Tournament Bojanala's Clash Of Schools 2025				Tournament Bojanala's Clash Of Schools 2025
		date 2025-08-02	rnd 5	type Rapid	result 1	date 2025-08-02	rnd 5	type Rapid	result 1
		Opponent Monageng, N (Naledi)				Opponent Monageng, N (Naledi)

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	Roos ,J (Justin)	7	0.5	-364.3	7	0.5	-364.3	0	0	0	0	0	0
1	Roos ,J (Justin)	7	1408.2	1043.9	7	1406.4	1043.9	0	0	0	0	0	0
2	Britz ,JD (Jakobus Dirk)	5	0.5	-340	5	0.5	-340	0	0	0	0	0	0
2	Britz ,JD (Jakobus Dirk)	5	1315.8	975.8	5	1318.1	975.8	0	0	0	0	0	0
3	Jansen Van Vuuren ,L (Lourein)	5	2	-85	5	2	-85	0	0	0	0	0	0
3	Jansen Van Vuuren ,L (Lourein)	5	1061.9	976.9	5	1050.8	976.9	0	0	0	0	0	0
4	Janse Van Vuuren ,M (Mari)	5	4	255	5	4	255	0	0	0	0	0	0
4	Janse Van Vuuren ,M (Mari)	5	1065.7	1320.7	5	1075.4	1320.7	0	0	0	0	0	0
5	Bezuidenhout ,E (Ethan)	4	0	-425	4	0	-425	0	0	0	0	0	0
5	Bezuidenhout ,E (Ethan)	4	923.8	498.8	4	924	498.8	0	0	0	0	0	0
6	Van Der Berg ,KW (Kai Willem)	4	1	-212.5	4	1	-212.5	0	0	0	0	0	0
6	Van Der Berg ,KW (Kai Willem)	4	1335.3	1122.8	4	1326.1	1122.8	0	0	0	0	0	0
7	Nkwe ,T (Tumalano)	3	3	425	3	3	425	0	0	0	0	0	0
7	Nkwe ,T (Tumalano)	3	1129.1	1554.1	3	1118.3	1554.1	0	0	0	0	0	0
8	Jansen Van Vuuren ,M (Mari)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
8	Jansen Van Vuuren ,M (Mari)	3	1171	1312.7	3	1167.1	1312.7	0	0	0	0	0	0
9	Sibiya ,K (Khayalethu)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
9	Sibiya ,K (Khayalethu)	3	1107.7	966	3	1094.7	966	0	0	0	0	0	0
10	Schwim ,X (Xander)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
10	Schwim ,X (Xander)	3	1272.8	1131.2	3	1271.4	1131.2	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

Byliefeldt, M (Mienke)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms