Chess South Africa Ratings Database

PLAYER PAGE

Personal

Mostert, PJ (Pieter)

Chess SA id

1100109067

FIDE id

Date of birth

2010-03-10 (U16)

Gender

Male

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	1282	1232.6	1243.7	1200
Raw rating	1282	1232.6	1243.7	1200
Weighted rating	1240	1231	1177.9	1200
Weighted performance	1129.6	945.3	0	0
Floor	848.8	850.3	743.7	700
K-factor	36	36	36	36
Min/Max rating change allowed	147.5	158.3	155.8	165.8
Highest rating	1359.9 2022-11-01	1360.5 2022-11-01	1243.7 2025-09-01	1200 2018-10-01
Highest raw rating	1348.8 2022-12-01	1350.3 2022-12-01	1243.7 2025-09-01	1200 2024-02-01
Highest weighted rating	1348.8 2023-08-01	1350.3 2023-10-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1359.9 2022-11-01	1360.5 2022-11-01	1200 2020-01-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1282	1232.6	1243.7	1200
Analysis
Rating	1282	1232.6	1243.7	1200
Raw rating	1282	1232.6	1243.7	1200
Weighted rating	1240	1231	1177.9
Weighted performance	1129.6	945.3	0
K-factor	36	36	36	36
Floor	848.8	850.3	743.7	700
Max/Min rating change allowed	147.5	158.3	155.8	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	1282	1232.6	1243.7	1200
New weighted rating	1243.8	1231.2	1183.6	1200
New weighted performance	1122.3	938.5	0	0
Temp new rating	1282	1232.6	1243.7	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1282	1232.6	1243.7	1200
New K-factor	36	36	36	36
New floor	848.8	850.3	743.7	700

Item	Main	Standard	Rapid
	0	0	0
	9	4	5
	9	4	5
	55	50	5
	54	54	0
	5	5	0
History	198	183	15

Games since
	Main 18	Standard 8		Rapid 10		Blitz 0
Gender	Male
Age group	U16
Region	Bojanala Platina (NBR)
Province	Northwest (NW)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	6	66.67	141.7	1261.4	1403.1
Standard	4	1	25	-212.5	1387.4	1174.9
Rapid	5	5	100	425	1160.6	1585.6
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	198	108.5	54.8	40.8	1214.7	1255.5
Standard	183	98.5	53.83	32.5	1218.6	1251.1
Rapid	15	10	66.67	141.7	1167.1	1308.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1282	1232.6	1243.7	1200
2025-09-30	1282	1232.6	1243.7	1200
2025-09-01	1282	1232.6	1243.7	1200
2025-08-01	1230.1	1232.6	1161.9	1200
2025-07-01	1230.1	1232.6	1161.9	1200
2025-06-01	1230.1	1232.6	1161.9	1200
2025-05-01	1230.1	1232.6	1161.9	1200
2025-04-01	1230.1	1232.6	1161.9	1200
2025-03-01	1232.4	1235.1	1161.9	1200
2025-02-01	1232.4	1235.1	1161.3	1200
2025-01-01	1220.7	1226.8	1141.6	1200
2024-12-01	1220.7	1226.8	1141.6	1200
2024-11-01	1220.7	1226.8	1141.6	1200
2024-10-01	1220.7	1226.8	1141.6	1200
2024-09-01	1220.7	1226.8	1141.6	1200
2024-08-01	1220.7	1226.8	1141.6	1200
2024-07-01	1228.3	1226.8	1178	1200
2024-09-01	1228.3	1226.8	1178	1200
2024-05-01	1228.3	1226.8	1178	1200
2024-04-01	1228.3	1226.8	1178	1200
2024-03-01	1228.3	1226.8	1178	1200
2024-02-01	1228.3	1226.8	1178	1200
2024-01-01	1242.3	1242.6	1178	1200
2023-12-01	1242.3	1242.6	1178	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 (High School B)	2025-08-02	2025-08-02	Rapid	Bojanala Platina (NBR)	5	5	5	Yes	Analysis
2	Bojanala Circuit Championships 1 of 4 2025 (U16)	2025-03-01	2025-03-01	Standard	Bojanala Platina (NBR)	5	4	1	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 (High School B)	2025-08-02	2025-08-02	Rapid	Bojanala Platina (NBR)	5	5	5	Yes	Analysis
2	Bojanala Circuit Championships 1 of 4 2025 (U16)	2025-03-01	2025-03-01	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
3	Bojanala's Clash Of Schools - Secondary 2024 (High School Seniors)	2024-07-27	2024-07-27	Rapid	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
4	Bojanala Closed Chess Championships Stage 1 2024 (U16)	2024-01-27	2024-01-27	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
5	West Rand vs Bojanala Inter-Regional Championships 2023 (U14)	2023-10-14	2023-10-14	Standard	West Rand (GWR)	5	5	1	Yes	Analysis
6	Bojanala's Battle Of Mount Cambridge 2023 (Knights)	2023-09-16	2023-09-16	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
7	Bojanala's Spring Cleaning 2023 (Rooks)	2023-08-26	2023-08-26	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
8	Bojanala School League 2023 (Primary School Open)	2023-08-19	2023-08-19	Rapid	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
9	Bojanala's FIDE in the Sparkling Waters 2023 (Rooks)	2023-07-28	2023-07-30	Standard	Bojanala Platina (NBR)	6	6	2.5	Yes	Analysis
10	Olienpark - 2nd One for the Ages 2023 (U14)	2023-05-13	2023-05-13	Standard	Bojanala Platina (NBR)	5	5	2.5	Yes	Analysis
11	Grenswag's Community Battle 2023 (Rooks)	2023-04-22	2023-04-22	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
12	Schoemies Kings & Queens 2023 (Rooks)	2023-03-18	2023-03-18	Standard	Bojanala Platina (NBR)	5	5	1.5	Yes	Analysis
13	Nories Make It Happen 2023 (Rooks)	2023-03-04	2023-03-04	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
14	One For The Ages 2023 (U14)	2023-02-18	2023-02-18	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
15	Harties Wolf Pack 2023 (Rooks)	2023-01-21	2023-01-21	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
16	2022 South African Junior Team Chess Championships (U14 Open)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	6	4	Yes	Analysis
17	West Rand vs Bojanala 2022 (U14B)	2022-11-05	2022-11-05	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
18	FIDE at The King`s Gate 2.0 2022 (Junior)	2022-10-22	2022-10-22	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
19	Bojanala SAJCC Trials 2022 (U14)	2022-09-23	2022-09-23	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
20	Bojanala Chess Federation Wildcards 2022 (Knights)	2022-08-20	2022-08-20	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
21	Bojanala Chess Federation Clash of Schools 2022 (PS Championship)	2022-07-22	2022-07-22	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
22	2nd One For The Ages 2022 (U14)	2022-07-30	2022-07-30	Standard	Bojanala Platina (NBR)	5	4	2	Yes	Analysis
23	One For The Ages 2022 (U14)	2022-07-16	2022-07-16	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis
24	RHS Know Thyself 2022 (C)	2022-04-23	2022-04-23	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
25	Lebone II 2022 (C)	2022-02-12	2022-02-12	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
26	The Meridian 2022 (U14)	2022-01-22	2022-01-22	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
27	Back to the Board 2021 (U12)	2021-04-17	2021-04-17	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
28	Hoerskool Brits Toernooi 2020 (U12)	2020-03-14	2020-03-14	Standard	Bojanala Platina (NBR)	5	5	2.5	Yes	Analysis
29	Lebone II 2020 (U12)	2020-02-15	2020-02-15	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
30	2019 South African Junior Team Championships (U10A)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	7	2	Yes	Analysis
31	NW Open 2019 (U10)	2019-10-12	2019-10-12	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
32	Inter Region 2019 (U10 Open)	2019-10-19	2019-10-19	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
33	Lebone II 2019 (U10)	2019-09-14	2019-09-14	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
34	Laerskool Brits 2019 (U10)	2019-08-31	2019-08-31	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
35	Grenville 2019 (U10)	2019-06-08	2019-06-08	Standard	Bojanala Platina (NBR)	5	5	3	Yes	Analysis
36	Inter Regional Chess Championship 2019 (U10)	2019-05-10	2019-05-11	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis
37	Laerskool Proteapark 2019 (C)	2019-05-18	2019-05-18	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
38	Hoerskool Rustenburg Skaak 2019 (U10)	2019-04-13	2019-04-13	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
39	Laerskool Vastrap Tournament 2019 (E)	2019-02-23	2019-02-23	Standard	Bojanala Platina (NBR)	5	5	3.5	Yes	Analysis
40	Fields College Open 2019 (U10)	2019-02-02	2019-02-02	Standard	Bojanala Platina (NBR)	5	4	1	Yes	Analysis

#	Games	Start				End
1	5	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 5	type Rapid	result 1
		Opponent Tembo, T (Terence)				Opponent Venter, S (Stephan)
2	5	Tournament Bojanala SAJCC Trials 2022				Tournament FIDE at The King`s Gate 2.0 2022
		date 2022-09-23	rnd 5	type Standard	result 1	date 2022-10-22	rnd 4	type Standard	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Obrien, P (Patrick)
3	5	Tournament Hoerskool Rustenburg Skaak 2019				Tournament Inter Regional Chess Championship 2019
		date 2019-04-13	rnd 3	type Standard	result 1	date 2019-05-10	rnd 2	type Standard	result 1
		Opponent Enslin, N (Nathan)				Opponent Streicher, C (Calla)

#	Games	Start				End
1	5	Tournament Bojanala SAJCC Trials 2022				Tournament FIDE at The King`s Gate 2.0 2022
		date 2022-09-23	rnd 5	type Standard	result 1	date 2022-10-22	rnd 4	type Standard	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Obrien, P (Patrick)
2	5	Tournament Hoerskool Rustenburg Skaak 2019				Tournament Inter Regional Chess Championship 2019
		date 2019-04-13	rnd 3	type Standard	result 1	date 2019-05-10	rnd 2	type Standard	result 1
		Opponent Enslin, N (Nathan)				Opponent Streicher, C (Calla)
3	4	Tournament Harties Wolf Pack 2023				Tournament One For The Ages 2023
		date 2023-01-21	rnd 3	type Standard	result 1	date 2023-02-18	rnd 1	type Standard	result 1
		Opponent Jansen Van Vuuren, M (Mari)				Opponent Dikgole, L (Lethabo)

#	Games	Start				End
1	5	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 5	type Rapid	result 1
		Opponent Tembo, T (Terence)				Opponent Venter, S (Stephan)
2	2	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Bojanala's Clash Of Schools - Secondary 2024
		date 2024-07-27	rnd 3	type Rapid	result 1	date 2024-07-27	rnd 4	type Rapid	result 1
		Opponent Badenhorst, H (Hein)				Opponent Tshidi, T (Tshegofatso)
3	1	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Bojanala's Clash Of Schools - Secondary 2024
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2024-07-27	rnd 1	type Rapid	result 1
		Opponent Motsoasele, O (Omogolo)				Opponent Motsoasele, O (Omogolo)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	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 5	type Rapid	result 1
		Opponent Tembo, T (Terence)				Opponent Venter, S (Stephan)
2	5	Tournament Bojanala SAJCC Trials 2022				Tournament FIDE at The King`s Gate 2.0 2022
		date 2022-09-23	rnd 5	type Standard	result 1	date 2022-10-22	rnd 4	type Standard	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Obrien, P (Patrick)
3	5	Tournament Hoerskool Rustenburg Skaak 2019				Tournament Inter Regional Chess Championship 2019
		date 2019-04-13	rnd 3	type Standard	result 1	date 2019-05-10	rnd 2	type Standard	result 1
		Opponent Enslin, N (Nathan)				Opponent Streicher, C (Calla)

#	Games	Start				End
1	5	Tournament Bojanala SAJCC Trials 2022				Tournament FIDE at The King`s Gate 2.0 2022
		date 2022-09-23	rnd 5	type Standard	result 1	date 2022-10-22	rnd 4	type Standard	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Obrien, P (Patrick)
2	5	Tournament Hoerskool Rustenburg Skaak 2019				Tournament Inter Regional Chess Championship 2019
		date 2019-04-13	rnd 3	type Standard	result 1	date 2019-05-10	rnd 2	type Standard	result 1
		Opponent Enslin, N (Nathan)				Opponent Streicher, C (Calla)
3	4	Tournament Harties Wolf Pack 2023				Tournament One For The Ages 2023
		date 2023-01-21	rnd 3	type Standard	result 1	date 2023-02-18	rnd 1	type Standard	result 1
		Opponent Jansen Van Vuuren, M (Mari)				Opponent Dikgole, L (Lethabo)

#	Games	Start				End
1	5	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 5	type Rapid	result 1
		Opponent Tembo, T (Terence)				Opponent Venter, S (Stephan)
2	2	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Bojanala's Clash Of Schools - Secondary 2024
		date 2024-07-27	rnd 3	type Rapid	result 1	date 2024-07-27	rnd 4	type Rapid	result 1
		Opponent Badenhorst, H (Hein)				Opponent Tshidi, T (Tshegofatso)
3	1	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Bojanala's Clash Of Schools - Secondary 2024
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2024-07-27	rnd 1	type Rapid	result 1
		Opponent Motsoasele, O (Omogolo)				Opponent Motsoasele, O (Omogolo)

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	Bantseke ,B (Boikanyo)	5	1	-255	5	1	-255	0	0	0	0	0	0
1	Bantseke ,B (Boikanyo)	5	1287.1	1032.1	5	1281.6	1032.1	0	0	0	0	0	0
2	Morkel ,DJ (Douglas Jonathan)	5	3	85	4	3	212.5	1	0	-425	0	0	0
2	Morkel ,DJ (Douglas Jonathan)	5	1174	1259	4	1132.2	1386.5	1	1124.4	749	0	0	0
3	Pedersen ,J (Jj)	4	2	0	4	2	0	0	0	0	0	0	0
3	Pedersen ,J (Jj)	4	1221.4	1221.4	4	1218.3	1221.4	0	0	0	0	0	0
4	Changara ,A (Adrian Tafara)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
4	Changara ,A (Adrian Tafara)	4	1196.9	1409.4	4	1212.7	1409.4	0	0	0	0	0	0
5	Nortman ,WJ (Wilhelmus Johan)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
5	Nortman ,WJ (Wilhelmus Johan)	4	1358.5	1571	4	1341.5	1571	0	0	0	0	0	0
6	Letupu ,L (Lemogang)	4	0	-425	4	0	-425	0	0	0	0	0	0
6	Letupu ,L (Lemogang)	4	1305	880	4	1312.4	880	0	0	0	0	0	0
7	Legwale ,L (Lesedi)	4	3	212.5	4	3	212.5	0	0	0	0	0	0
7	Legwale ,L (Lesedi)	4	1187.2	1399.7	4	1175.4	1399.7	0	0	0	0	0	0
8	Van Der Berg ,KW (Kai Willem)	4	0	-425	4	0	-425	0	0	0	0	0	0
8	Van Der Berg ,KW (Kai Willem)	4	1398.2	973.2	4	1387.7	973.2	0	0	0	0	0	0
9	Jansen Van Vuuren ,L (Lourein)	3	3	425	3	3	425	0	0	0	0	0	0
9	Jansen Van Vuuren ,L (Lourein)	3	1040.9	1465.9	3	1032.2	1465.9	0	0	0	0	0	0
10	Roos ,J (Justin)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
10	Roos ,J (Justin)	3	1388.6	1246.9	3	1380	1246.9	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

Tournaments

Grand Prix

Statistics

Notifications

PLAYER PAGE

Personal

Mostert, PJ (Pieter)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms