Chess South Africa Ratings Database

PLAYER PAGE

Personal

Willemse, PJ (Pierre Jean)

Chess SA id

1110133701

FIDE id

Date of birth

2011-11-26 (U16)

Gender

Male

Region

Sedibeng (GSV)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-10-18

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

1255.8

Item	Main	Standard	Rapid	Blitz
Rating	1381.4	1394.3	1209.9	1200
Raw rating	1355.5	1358.2	1209.9	1200
Weighted rating	1381.4	1394.3	1201.8	1200
Weighted performance	1217.5	1247.3	0	0
Floor	920.9	925.4	709.9	700
K-factor	32	32	36	36
Min/Max rating change allowed	132.9	132.4	163.5	165.8
Highest rating	1436.4 2023-10-01	1437.7 2024-04-01	1209.9 2025-05-05	1200 2018-10-01
Highest raw rating	1420.9 2023-11-01	1425.4 2025-06-01	1209.9 2025-05-05	1200 2024-02-01
Highest weighted rating	1420.9 2024-10-01	1425.4 2024-10-01	1209.9 2018-10-01	1200 2018-10-01
Highest weighted performance	1436.4 2023-10-01	1437.7 2024-04-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-2.4	-3	0	0
New rating	1379	1391.3	1209.9	1200
Analysis
Rating	1381.4	1394.3	1209.9	1200
Raw rating	1355.5	1358.2	1209.9	1200
Weighted rating	1381.4	1394.3	1201.8
Weighted performance	1217.5	1247.3	0
K-factor	32	32	36	36
Floor	920.9	925.4	709.9	700
Max/Min rating change allowed	132.9	132.4	163.5	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	1355.5	1358.2	1209.9	1200
New weighted rating	1379	1391.3	1202.6	1200
New weighted performance	1210.1	1239.7	0	0
Temp new rating	1379	1391.3	1209.9	1200
Temp new rating +/-	-2.4	-3	0	0
Final new rating +/-	-2.4	-3	0	0
New rating	1379	1391.3	1209.9	1200
New K-factor	32	32	36	36
New floor	920.9	925.4	709.9	700

Item	Main	Standard	Rapid
	0	0	0
	34	23	11
	55	48	7
	45	45	0
	59	59	0
	10	10	0
History	203	185	18

Games since
	Main 89	Standard 71		Rapid 18		Blitz 0
Gender	Male
Age group	U16
Region	Sedibeng (GSV)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	2386		834		78
Male	1928		665		66
U16	370		126		14
U16 Male	277		91		8
Standard
	RSA		Province		Region
Overall	2156		800		74
Male	1754		644		62
U16	328		118		11
U16 Male	253		88		7
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	34	16.5	48.53	-12.5	1377.2	1364.7
Standard	23	12.5	54.35	37	1337.6	1374.5
Rapid	11	4	36.36	-115.9	1460.1	1344.2
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	203	108	53.2	27.2	1277.5	1304.7
Standard	185	101	54.59	39.1	1267	1306
Rapid	18	7	38.89	-94.4	1386.1	1291.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1355.5	1358.2	1209.9	1200
2025-09-30	1394.8	1407.1	1209.9	1200
2025-09-01	1394.8	1407.1	1209.9	1200
2025-08-01	1394.8	1407.1	1209.9	1200
2025-07-01	1394.8	1407.1	1209.9	1200
2025-06-01	1404.3	1425.4	1209.9	1200
2025-05-01	1387.8	1409.5	1209.9	1200
2025-04-01	1393.9	1409.5	1193.8	1200
2025-03-01	1377.1	1385.8	1195.5	1200
2025-02-01	1372.2	1380.5	1195.2	1200
2025-01-01	1312	1321	1190.3	1200
2024-12-01	1337.3	1349.2	1190.3	1200
2024-11-01	1357	1374.2	1190.3	1200
2024-10-01	1368.2	1393.1	1190.3	1200
2024-09-01	1384.9	1419.3	1190.3	1200
2024-08-01	1384.9	1419.3	1190.3	1200
2024-07-01	1416.4	1419.3	1200	1200
2024-09-01	1420.1	1424.7	1200	1200
2024-05-01	1420.1	1424.7	1200	1200
2024-04-01	1349.9	1338.3	1200	1200
2024-03-01	1395.3	1392.7	1200	1200
2024-02-01	1395.3	1392.7	1200	1200
2024-01-01	1420.9	1419.3	1200	1200
2023-12-01	1420.9	1419.3	1200	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	LS Fonteine Open 18 Oct 2025 (B+C)	2025-10-18	2025-10-18	Standard	Sedibeng (GSV)	5	4	1	Yes	Analysis
2	LS Vryheidsmonument Chess Open 21 Jun 2025 (C)	2025-06-21	2025-06-21	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
3	GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U15 Boys)	2025-05-24	2025-05-24	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
4	HS Overvaal Rapid 12 Apr 2025 (C)	2025-04-12	2025-04-12	Rapid	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
5	Destinata Rapid Open 025 (Prestige)	2025-03-15	2025-03-15	Rapid	Sedibeng (GSV)	6	6	1.5	Yes	Analysis
6	Hoerskool Drie Riviere Open 08 March 2025 (C)	2025-03-08	2025-03-08	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
7	Laerskool Vaalpark Open 01 March 25 (C)	2025-03-01	2025-03-01	Standard	Sedibeng (GSV)	5	4	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	LS Fonteine Open 18 Oct 2025 (B+C)	2025-10-18	2025-10-18	Standard	Sedibeng (GSV)	5	4	1	Yes	Analysis
2	LS Vryheidsmonument Chess Open 21 Jun 2025 (C)	2025-06-21	2025-06-21	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
3	GDE Sedibeng East Schools - D7 Individuals 24 May 2025 (U15 Boys)	2025-05-24	2025-05-24	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
4	HS Overvaal Rapid 12 Apr 2025 (C)	2025-04-12	2025-04-12	Rapid	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
5	Destinata Rapid Open 025 (Prestige)	2025-03-15	2025-03-15	Rapid	Sedibeng (GSV)	6	6	1.5	Yes	Analysis
6	Hoerskool Drie Riviere Open 08 March 2025 (C)	2025-03-08	2025-03-08	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
7	Laerskool Vaalpark Open 01 March 25 (C)	2025-03-01	2025-03-01	Standard	Sedibeng (GSV)	5	4	2	Yes	Analysis
8	Gauteng Inter-Region at UJ 2024 (U14 Open)	2024-12-07	2024-12-08	Standard	Johannesburg Metro (GJM)	5	5	1	Yes	Analysis
9	Queens Gambit Chess Open 2024 (C)	2024-11-23	2024-11-23	Standard	Sedibeng (GSV)	5	3	1	Yes	Analysis
10	Fonteine Open 2024 (C)	2024-10-19	2024-10-19	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
11	Sedibeng Chess Open 07 Sept 24 (C)	2024-09-07	2024-09-07	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
12	Midvaal Winter Classic 13 July 2024 (D)	2024-07-13	2024-07-13	Rapid	Sedibeng (GSV)	7	7	3	Yes	Analysis
13	AG Visser Open 2024 (C)	2024-06-08	2024-06-08	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
14	Hoerskool Overvaal Chess Open 2024 (C)	2024-04-20	2024-04-20	Standard	Sedibeng (GSV)	5	5	4.5	Yes	Analysis
15	Vaalpark Primary Chess Open 2024 (C)	2024-04-13	2024-04-13	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis
16	Valia's Open 2024 (C)	2024-03-02	2024-03-02	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
17	Laerskool Midvaal Chess Open Section 2024 (C)	2024-02-10	2024-02-10	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
18	2024 Gauteng Inter-Region Chess Championship (U14A)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	5	1.5	Yes	Analysis
19	NWU Vaal Open 2023 (D)	2023-10-14	2023-10-14	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
20	Eureka Open 2023 (D)	2023-07-29	2023-07-29	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
21	Valia's Chess Tournament 2023 (C)	2023-05-06	2023-05-06	Standard	Sedibeng (GSV)	5	5	3.5	Yes	Analysis
22	Gauteng Schools D7 2023 (U13 Boys)	2023-05-20	2023-05-20	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
23	Driehoek Open Chess Tournament 2023 (C)	2023-09-13	2023-09-13	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
24	Gauteng Schools Individual Finals 2023 (U13 Boys)	2023-05-26	2023-05-26	Standard	Ekurhuleni (GE)	5	5	2.5	Yes	Analysis
25	Overvaal Open 2023 (D)	2023-04-15	2023-04-15	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
26	Heidelberg Open 2023 (C)	2023-02-04	2023-02-04	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
27	AG Visser Open 2023 (A+B)	2023-02-18	2023-02-18	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
28	Dr Peter Hangelbroek Open 2022 (E)	2022-10-29	2022-10-29	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
29	Overvaal Open 2022 (C)	2022-08-06	2022-08-06	Standard	Sedibeng (GSV)	5	4	0	Yes	Analysis
30	D7 Teams 2022 (U13 Mixed+Girls)	2022-08-13	2022-08-13	Standard	Sedibeng (GSV)	5	5	1.5	Yes	Analysis
31	Eureka Open 2022 (C)	2022-07-30	2022-07-30	Standard	Sedibeng (GSV)	5	0	0	No	Analysis
32	Hoerskool Overvaal 2022 (C)	2022-06-11	2022-06-11	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
33	Gaueng Schools D7 2022 (U11 Boys)	2022-06-04	2022-06-04	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
34	2022 Gauteng Schools Individual Chess Championship (U11 Boys)	2022-06-18	2022-06-18	Standard	Ekurhuleni (GE)	5	5	1.5	Yes	Analysis
35	LS Vryheidsmonument Chess Open 2022 (C)	2022-05-07	2022-05-07	Standard	Sedibeng (GSV)	5	5	3	Yes	Analysis
36	Lux Deo NG Kerk Chess Open 2022 (C)	2022-04-09	2022-04-09	Standard	Sedibeng (GSV)	5	5	2	Yes	Analysis
37	Dirk De Koster Chess Open 2022 (C)	2022-04-23	2022-04-23	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
38	Carel`s Chess Open 2022 (D)	2022-03-05	2022-03-05	Standard	Sedibeng (GSV)	5	5	5	Yes	Analysis
39	2022 Gauteng Interregion (U12 Open)	2022-02-26	2022-02-26	Standard	Tshwane (GTP)	5	5	2	Yes	Analysis
40	Heidelberg Open 2022 (D)	2022-05-02	2022-05-02	Standard	Sedibeng (GSV)	5	5	4	Yes	Analysis
41	Sedibeng Trials 20 November 2021 (A)	2021-11-20	2021-11-20	Standard	Sedibeng (GSV)	5	5	1	Yes	Analysis
42	Mabaleng Chess Open 2021 (D)	2021-11-27	2021-11-27	Standard	Sedibeng (GSV)	5	5	2.5	Yes	Analysis

#	Games	Start				End
1	9	Tournament Valia's Chess Tournament 2023				Tournament Gauteng Schools Individual Finals 2023
		date 2023-05-06	rnd 3	type Standard	result 0.5	date 2023-05-26	rnd 1	type Standard	result 1
		Opponent Mgwevu, K (Kamohelo)				Opponent Mbatha, B (Bongumusa)
2	7	Tournament 2022 Gauteng Interregion				Tournament Lux Deo NG Kerk Chess Open 2022
		date 2022-02-26	rnd 5	type Standard	result 1	date 2022-04-09	rnd 1	type Standard	result 1
		Opponent Behr, A (Alexander)				Opponent Nelisiwe, N (Nkuna)
3	5	Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025				Tournament LS Vryheidsmonument Chess Open 21 Jun 2025
		date 2025-05-24	rnd 3	type Standard	result 1	date 2025-06-21	rnd 2	type Standard	result 1
		Opponent Pule, T (Tshegofatso)				Opponent Booysen, Z (Zian)

#	Games	Start				End
1	9	Tournament Valia's Chess Tournament 2023				Tournament Gauteng Schools Individual Finals 2023
		date 2023-05-06	rnd 3	type Standard	result 0.5	date 2023-05-26	rnd 1	type Standard	result 1
		Opponent Mgwevu, K (Kamohelo)				Opponent Mbatha, B (Bongumusa)
2	7	Tournament 2022 Gauteng Interregion				Tournament Lux Deo NG Kerk Chess Open 2022
		date 2022-02-26	rnd 5	type Standard	result 1	date 2022-04-09	rnd 1	type Standard	result 1
		Opponent Behr, A (Alexander)				Opponent Nelisiwe, N (Nkuna)
3	5	Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025				Tournament LS Vryheidsmonument Chess Open 21 Jun 2025
		date 2025-05-24	rnd 3	type Standard	result 1	date 2025-06-21	rnd 2	type Standard	result 1
		Opponent Pule, T (Tshegofatso)				Opponent Booysen, Z (Zian)

#	Games	Start				End
1	3	Tournament Midvaal Winter Classic 13 July 2024				Tournament Midvaal Winter Classic 13 July 2024
		date 2024-07-13	rnd 3	type Rapid	result 1	date 2024-07-13	rnd 5	type Rapid	result 1
		Opponent Erasmus, M (Max)				Opponent Coetzer, Z (Zinique)
2	2	Tournament HS Overvaal Rapid 12 Apr 2025				Tournament HS Overvaal Rapid 12 Apr 2025
		date 2025-04-12	rnd 1	type Rapid	result 1	date 2025-04-12	rnd 2	type Rapid	result 0.5
		Opponent Lempe, R (Rorisang)				Opponent Tolmay, W (Walroux)
3	1	Tournament HS Overvaal Rapid 12 Apr 2025				Tournament HS Overvaal Rapid 12 Apr 2025
		date 2025-04-12	rnd 4	type Rapid	result 1	date 2025-04-12	rnd 4	type Rapid	result 1
		Opponent Letsela, T (Teboho)				Opponent Letsela, T (Teboho)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament 2022 Gauteng Interregion				Tournament Lux Deo NG Kerk Chess Open 2022
		date 2022-02-26	rnd 5	type Standard	result 1	date 2022-04-09	rnd 1	type Standard	result 1
		Opponent Behr, A (Alexander)				Opponent Nelisiwe, N (Nkuna)
2	5	Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025				Tournament LS Vryheidsmonument Chess Open 21 Jun 2025
		date 2025-05-24	rnd 3	type Standard	result 1	date 2025-06-21	rnd 2	type Standard	result 1
		Opponent Pule, T (Tshegofatso)				Opponent Booysen, Z (Zian)
3	5	Tournament NWU Vaal Open 2023				Tournament NWU Vaal Open 2023
		date 2023-10-14	rnd 1	type Standard	result 1	date 2023-10-14	rnd 5	type Standard	result 1
		Opponent Geyer, C (Christiaan)				Opponent Matla, K (Kemuel)

#	Games	Start				End
1	7	Tournament 2022 Gauteng Interregion				Tournament Lux Deo NG Kerk Chess Open 2022
		date 2022-02-26	rnd 5	type Standard	result 1	date 2022-04-09	rnd 1	type Standard	result 1
		Opponent Behr, A (Alexander)				Opponent Nelisiwe, N (Nkuna)
2	5	Tournament GDE Sedibeng East Schools - D7 Individuals 24 May 2025				Tournament LS Vryheidsmonument Chess Open 21 Jun 2025
		date 2025-05-24	rnd 3	type Standard	result 1	date 2025-06-21	rnd 2	type Standard	result 1
		Opponent Pule, T (Tshegofatso)				Opponent Booysen, Z (Zian)
3	5	Tournament NWU Vaal Open 2023				Tournament NWU Vaal Open 2023
		date 2023-10-14	rnd 1	type Standard	result 1	date 2023-10-14	rnd 5	type Standard	result 1
		Opponent Geyer, C (Christiaan)				Opponent Matla, K (Kemuel)

#	Games	Start				End
1	3	Tournament Midvaal Winter Classic 13 July 2024				Tournament Midvaal Winter Classic 13 July 2024
		date 2024-07-13	rnd 3	type Rapid	result 1	date 2024-07-13	rnd 5	type Rapid	result 1
		Opponent Erasmus, M (Max)				Opponent Coetzer, Z (Zinique)
2	1	Tournament HS Overvaal Rapid 12 Apr 2025				Tournament HS Overvaal Rapid 12 Apr 2025
		date 2025-04-12	rnd 4	type Rapid	result 1	date 2025-04-12	rnd 4	type Rapid	result 1
		Opponent Letsela, T (Teboho)				Opponent Letsela, T (Teboho)
3	1	Tournament HS Overvaal Rapid 12 Apr 2025				Tournament HS Overvaal Rapid 12 Apr 2025
		date 2025-04-12	rnd 1	type Rapid	result 1	date 2025-04-12	rnd 1	type Rapid	result 1
		Opponent Lempe, R (Rorisang)				Opponent Lempe, R (Rorisang)

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	Maseloane ,T (Tshepang)	6	3	0	6	3	0	0	0	0	0	0	0
1	Maseloane ,T (Tshepang)	6	1371.9	1371.9	6	1375.8	1371.9	0	0	0	0	0	0
2	Visser ,M (Mila)	5	4	255	5	4	255	0	0	0	0	0	0
2	Visser ,M (Mila)	5	1324.2	1579.2	5	1325.7	1579.2	0	0	0	0	0	0
3	Odendaal ,H (Hayden)	4	4	425	4	4	425	0	0	0	0	0	0
3	Odendaal ,H (Hayden)	4	1299.1	1724.1	4	1321	1724.1	0	0	0	0	0	0
4	Williams ,A (Anika)	4	0	-425	4	0	-425	0	0	0	0	0	0
4	Williams ,A (Anika)	4	1392.5	967.5	4	1380.2	967.5	0	0	0	0	0	0
5	Kotzee ,A (Armand)	4	0	-425	4	0	-425	0	0	0	0	0	0
5	Kotzee ,A (Armand)	4	1344.9	919.9	4	1328.8	919.9	0	0	0	0	0	0
6	Emanuel ,C (Caitlin)	4	2.5	106.2	3	2.5	283.3	1	0	-425	0	0	0
6	Emanuel ,C (Caitlin)	4	1359.7	1466	3	1346.3	1643.1	1	1293	934.7	0	0	0
7	Van Doorn ,R (Reinhardt)	3	3	425	3	3	425	0	0	0	0	0	0
7	Van Doorn ,R (Reinhardt)	3	1137.3	1562.3	3	1131.8	1562.3	0	0	0	0	0	0
8	Kemp ,J (Jowan)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
8	Kemp ,J (Jowan)	3	1358.3	1216.6	3	1355.4	1216.6	0	0	0	0	0	0
9	Coetzer ,Z (Zinique)	3	3	425	2	2	425	1	1	425	0	0	0
9	Coetzer ,Z (Zinique)	3	1282.6	1707.6	2	1236.4	1707.6	1	1222.4	1707.6	0	0	0
10	Tolmay ,W (Walroux)	3	1.5	0	2	1	0	1	0.5	0	0	0	0
10	Tolmay ,W (Walroux)	3	1448.8	1448.8	2	1469.9	1448.8	1	1286.4	1448.8	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Willemse, PJ (Pierre Jean)

Ratings

Game statistics

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms