Chess South Africa Ratings Database

PLAYER PAGE

Personal

Klaasens, J (Jemaine)

Chess SA id

1120139043

FIDE id

Date of birth

2012-01-24 (U14)

Gender

Male

Region

West Coast (WCU)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-07

Personal details last changed

2025-07-14

Junior GPX Games

51.1

Junior GPX Points

1443.1

Item	Main	Standard	Rapid	Blitz
Rating	1618.7	1559.9	1589.5	1200
Raw rating	1618.7	1555.1	1589.5	1200
Weighted rating	1505.4	1462	1454	1200
Weighted performance	1584.9	1559.9	1541.1	0
Floor	1122	1068.8	1089.5	700
K-factor	28	32	32	36
Min/Max rating change allowed	91.3	100	95.2	165.8
Highest rating	1622 2025-06-01	1577.5 2025-09-30	1589.5 2025-09-01	1200 2018-10-01
Highest raw rating	1622 2025-06-01	1568.8 2025-08-01	1589.5 2025-09-01	1200 2024-02-01
Highest weighted rating	1490.3 2025-09-30	1449.2 2025-09-30	1421.9 2025-09-01	1200 2018-10-01
Highest weighted performance	1622 2025-08-01	1577.5 2025-09-30	1575.5 2025-09-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	-4.7	0	0
New rating	1618.7	1555.1	1589.5	1200
Analysis
Rating	1618.7	1559.9	1589.5	1200
Raw rating	1618.7	1555.1	1589.5	1200
Weighted rating	1505.4	1462	1454
Weighted performance	1584.9	1559.9	1541.1
K-factor	28	32	32	36
Floor	1122	1068.8	1089.5	700
Max/Min rating change allowed	91.3	100	95.2	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	1618.7	1555.1	1589.5	1200
New weighted rating	1519.4	1473.8	1468.6	1200
New weighted performance	1575.4	1550.5	1531.6	0
Temp new rating	1618.7	1555.1	1589.5	1200
Temp new rating +/-	0	-4.7	0	0
Final new rating +/-	0	-4.7	0	0
New rating	1618.7	1555.1	1589.5	1200
New K-factor	28	32	32	36
New floor	1122	1068.8	1089.5	700

Item	Main	Standard	Rapid
	0	0	0
	47	33	14
	59	31	28
	75	26	49
	41	5	36
	0	0	0
History	222	95	127

Games since
	Main 115	Standard 68		Rapid 47		Blitz 0
Gender	Male
Age group	U14
Region	West Coast (WCU)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	566		172		7
Male	520		158		7
U14	59		16		2
U14 Male	52		13		2
Standard
	RSA		Province		Region
Overall	817		221		11
Male	721		193		9
U14	103		30		3
U14 Male	84		23		2
Rapid
	RSA		Province		Region
Overall	114		46		7
Male	108		44		5
U14	10		4		1
U14 Male	10		4		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	47	37.5	79.79	253.2	1412.7	1665.9
Standard	33	24.5	74.24	206.1	1457.3	1663.3
Rapid	14	13	92.86	364.3	1307.7	1672
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	222	158.5	71.4	181.9	1326.4	1508.2
Standard	95	63.5	66.84	143.2	1406.3	1549.5
Rapid	127	95	74.8	210.8	1266.5	1477.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1618.7	1555.1	1589.5	1200
2025-09-30	1618.7	1555.1	1589.5	1200
2025-09-01	1616.6	1549.7	1589.5	1200
2025-08-01	1619.9	1568.8	1558.8	1200
2025-07-01	1622	1559.1	1447	1200
2025-06-01	1622	1559.1	1447	1200
2025-05-01	1506	1449.6	1447	1200
2025-04-01	1506	1449.6	1447	1200
2025-03-01	1446	1402.3	1447	1200
2025-02-01	1418	1402.3	1376.3	1200
2025-01-01	1418	1402.3	1376.3	1200
2024-12-01	1416.4	1404.9	1376.3	1200
2024-11-01	1417.4	1404.9	1364.8	1200
2024-10-01	1417.4	1404.9	1364.8	1200
2024-09-01	1417.4	1404.9	1364.8	1200
2024-08-01	1371.7	1349.6	1364.8	1200
2024-07-01	1371.7	1349.6	1364.8	1200
2024-09-01	1371.7	1349.6	1364.8	1200
2024-05-01	1330.9	1277.2	1364.8	1200
2024-04-01	1330.9	1277.2	1364.8	1200
2024-03-01	1302.6	1277.2	1310.1	1200
2024-02-01	1296.1	1277.2	1286.3	1200
2024-01-01	1296.1	1277.2	1286.3	1200
2023-12-01	1296.1	1277.2	1286.3	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	Western Cape Schools - Top Schools 2025 (U13)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	4	Yes	Analysis
2	Rooibos Open 2025 (Elite)	2025-08-30	2025-08-30	Standard	West Coast (WCU)	5	4	2	Yes	Analysis
3	Pedro Booyse Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	5	4	4	Yes	Analysis
4	Western Cape Women�s Championship 2025 (Advanced)	2025-08-08	2025-08-10	Standard	West Coast (WCU)	6	6	3.5	Yes	Analysis
5	Lower West Coast Top Schools 2025 (U13)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
6	Western Cape Schools Individual Championship 2025 (U13 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	5	Yes	Analysis
7	West Coast And Mykonos Open 2025 (Advanced)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	6	6	4.5	Yes	Analysis
8	West Coast Schools Chess Prestige 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	6	5.5	Yes	Analysis
9	Lower West Coast Prestige 2025 (U13 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Western Cape Schools - Top Schools 2025 (U13)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	4	Yes	Analysis
2	Rooibos Open 2025 (Elite)	2025-08-30	2025-08-30	Standard	West Coast (WCU)	5	4	2	Yes	Analysis
3	Pedro Booyse Top Schools 2025 (U13)	2025-08-23	2025-08-23	Rapid	West Coast (WCU)	5	4	4	Yes	Analysis
4	Western Cape Women�s Championship 2025 (Advanced)	2025-08-08	2025-08-10	Standard	West Coast (WCU)	6	6	3.5	Yes	Analysis
5	Lower West Coast Top Schools 2025 (U13)	2025-06-14	2025-06-14	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
6	Western Cape Schools Individual Championship 2025 (U13 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	5	Yes	Analysis
7	West Coast And Mykonos Open 2025 (Advanced)	2025-05-02	2025-05-04	Standard	West Coast (WCU)	6	6	4.5	Yes	Analysis
8	West Coast Schools Chess Prestige 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	West Coast (WCU)	6	6	5.5	Yes	Analysis
9	Lower West Coast Prestige 2025 (U13 Boys)	2025-02-22	2025-02-22	Rapid	West Coast (WCU)	5	5	5	Yes	Analysis
10	St. Helena Bay Chess Club Open 2024 (A)	2024-12-07	2024-12-07	Standard	West Coast (WCU)	5	4	1.5	Yes	Analysis
11	PR Booyse Standard Tournament 2024 (Elite)	2024-11-02	2024-11-02	Standard	West Coast (WCU)	5	5	2.5	Yes	Analysis
12	West Coast Grand Challange League 2024 (PS Champions)	2024-10-26	2024-10-26	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
13	The Rooibos Open 2024 (Elite)	2024-08-24	2024-08-24	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
14	Western Cape Women�s Championship 2024 (Intermediate)	2024-08-10	2024-08-10	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
15	Pedro Booyse Top Schools Championships 2024 (U13)	2024-07-20	2024-07-20	Standard	West Coast (WCU)	5	5	3.5	Yes	Analysis
16	Western Cape - Kings and Queens 2024 (Boys)	2024-06-08	2024-06-08	Rapid	Overberg (WOS)	5	4	3.5	Yes	Analysis
17	West Coast & Mykonos Open 2024 (Open)	2024-05-17	2024-05-19	Standard	West Coast (WCU)	6	6	3.5	Yes	Analysis
18	Lower West Top Schools 2024 (U13)	2024-05-11	2024-05-11	Rapid	West Coast (WCU)	5	4	3.5	Yes	Analysis
19	Western Cape PS Individuals Championship 2024 (U13 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	3.5	Yes	Analysis
20	West Coast Schools Chess Prestige Championships 2024 (U13 Boys)	2024-03-09	2024-03-09	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
21	Lower West Coast Schools Chess Prestige 2024 (U13 Boys)	2024-02-17	2024-02-17	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
22	2023 Western Cape Rural Cup (U12)	2023-12-09	2023-12-10	Standard	Cape Winelands (WCW)	5	4	2	Yes	Analysis
23	Clanwilliam Chess Club Open 2023 (B)	2023-12-02	2023-12-02	Rapid	West Coast (WCU)	5	5	3.5	Yes	Analysis
24	West Coast Primary Schools Grand Challenge League 2023 (Primary School)	2023-10-21	2023-10-21	Rapid	West Coast (WCU)	5	5	3.5	Yes	Analysis
25	Western Cape Top Schools 2023 (U11 Mixed)	2023-09-02	2023-09-03	Standard	Cape Winelands (WCW)	6	6	5	Yes	Analysis
26	Deep Blue Open 2023 (Advanced)	2023-09-16	2023-09-16	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
27	Basil Ellman Rapid 2023 (B)	2023-09-30	2023-09-30	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
28	CW Top Schools 2023 (Intermediate)	2023-08-12	2023-08-12	Standard	West Coast (WCU)	5	5	3.5	Yes	Analysis
29	Pedro Booyse Top Schools Round 2 2023 (U11)	2023-08-22	2023-08-22	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
30	Pedro Booyse Top Schools 2023 (U11)	2023-07-29	2023-07-29	Rapid	West Coast (WCU)	5	5	4.5	Yes	Analysis
31	Youth Day 1 2023 (Open)	2023-06-17	2023-06-17	Rapid	West Coast (WCU)	5	5	2.5	Yes	Analysis
32	West Coast Open 2023 (Open)	2023-05-20	2023-06-03	Standard	West Coast (WCU)	5	5	4	Yes	Analysis
33	Lower West Coast Top Schools Championships 2023 (U9+U11)	2023-06-10	2023-06-10	Rapid	West Coast (WCU)	5	4	3	Yes	Analysis
34	Western Cape PS Individuals 2023 (U11 Boys)	2023-05-05	2023-05-06	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
35	WCCI Open 2023 (A)	2023-04-29	2023-04-29	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis
36	Lower West Coast Primary Schools Prestige Championships 2023 (U11 Boys)	2023-03-04	2023-03-04	Rapid	West Coast (WCU)	5	5	5	Yes	Analysis
37	West Coast Chess Open 2022 (U11)	2022-10-15	2022-10-15	Rapid	West Coast (WCU)	6	6	5.5	Yes	Analysis
38	Western Cape Woman`s Championship 2022 (Open)	2022-09-02	2022-09-04	Standard	West Coast (WCU)	5	5	2	Yes	Analysis
39	Deep Blue Chess Club 2022 (Juniors)	2022-08-20	2022-08-20	Rapid	West Coast (WCU)	5	5	5	Yes	Analysis
40	Onder-Weskus Top Skole 2022 (O13 Seuns)	2022-06-04	2022-06-04	Rapid	West Coast (WCU)	5	5	3	Yes	Analysis
41	Basil Ellman Annual Rapid 2022 (Development)	2022-06-25	2022-06-25	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis
42	West Coast Schools Chess Prestige Leg 2 2022 (U11 Boys)	2022-04-23	2022-04-23	Rapid	West Coast (WCU)	5	5	2.5	Yes	Analysis
43	West Coast Schools Chess Prestige Leg 1 2022 (U11 Boys)	2022-04-09	2022-04-09	Rapid	West Coast (WCU)	5	5	2	Yes	Analysis
44	Lower West Coast Schools Prestige 2022 (U11 Boys)	2022-03-19	2022-03-19	Rapid	West Coast (WCU)	5	5	4	Yes	Analysis

#	Games	Start				End
1	16	Tournament St. Helena Bay Chess Club Open 2024				Tournament West Coast And Mykonos Open 2025
		date 2024-12-07	rnd 3	type Standard	result 0.5	date 2025-05-03	rnd 3	type Standard	result 1
		Opponent Minnaar, E (Ethan)				Opponent Lebentlele, TH (Tloe)
2	13	Tournament West Coast Chess Open 2022				Tournament WCCI Open 2023
		date 2022-10-15	rnd 1	type Rapid	result 1	date 2023-04-29	rnd 2	type Rapid	result 1
		Opponent Ellman, A (Andries)				Opponent Love, C (Celine)
3	13	Tournament Onder-Weskus Top Skole 2022				Tournament Western Cape Woman`s Championship 2022
		date 2022-06-04	rnd 4	type Rapid	result 1	date 2022-09-02	rnd 1	type Standard	result 1
		Opponent Mana, I (Ikhona)				Opponent Gelant, R (Re Marqio)

#	Games	Start				End
1	11	Tournament St. Helena Bay Chess Club Open 2024				Tournament West Coast And Mykonos Open 2025
		date 2024-12-07	rnd 3	type Standard	result 0.5	date 2025-05-03	rnd 3	type Standard	result 1
		Opponent Minnaar, E (Ethan)				Opponent Lebentlele, TH (Tloe)
2	10	Tournament CW Top Schools 2023				Tournament 2023 Western Cape Rural Cup
		date 2023-08-12	rnd 3	type Standard	result 1	date 2023-12-09	rnd 1	type Standard	result 1
		Opponent Campbell, A (Anje)				Opponent Bester, S (Sebastian)
3	5	Tournament Western Cape Schools - Top Schools 2025				Tournament Western Cape Schools - Top Schools 2025
		date 2025-09-06	rnd 1	type Standard	result 0.5	date 2025-09-07	rnd 6	type Standard	result 1
		Opponent Fourie, R (Ruan)				Opponent Brink, A (Andrew)

#	Games	Start				End
1	25	Tournament Onder-Weskus Top Skole 2022				Tournament WCCI Open 2023
		date 2022-06-04	rnd 4	type Rapid	result 1	date 2023-04-29	rnd 2	type Rapid	result 1
		Opponent Mana, I (Ikhona)				Opponent Love, C (Celine)
2	14	Tournament Lower West Coast Prestige 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-02-22	rnd 1	type Rapid	result 1	date 2025-08-23	rnd 5	type Rapid	result 1
		Opponent Abrahams, J (Janovan)				Opponent Willems, H (Hyron)
3	12	Tournament West Coast Schools Chess Prestige Championships 2024				Tournament The Rooibos Open 2024
		date 2024-03-09	rnd 5	type Rapid	result 1	date 2024-08-24	rnd 3	type Rapid	result 1
		Opponent Jacobs, N (Nicholaas)				Opponent Van Wyk, R (Rowan-Lee)

No games found.

#	Games	Start				End

#	Games	Start				End
1	10	Tournament St. Helena Bay Chess Club Open 2024				Tournament West Coast Schools Chess Prestige 2025
		date 2024-12-07	rnd 5	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Love, C (Celine)				Opponent Andrew, T (Tyron)
2	7	Tournament Lower West Coast Primary Schools Prestige Championships 2023				Tournament WCCI Open 2023
		date 2023-03-04	rnd 1	type Rapid	result 1	date 2023-04-29	rnd 2	type Rapid	result 1
		Opponent Chipoka, S (Sasha)				Opponent Love, C (Celine)
3	7	Tournament Basil Ellman Annual Rapid 2022				Tournament Western Cape Woman`s Championship 2022
		date 2022-06-25	rnd 5	type Rapid	result 1	date 2022-09-02	rnd 1	type Standard	result 1
		Opponent Olivier, M (Micarlo)				Opponent Gelant, R (Re Marqio)

#	Games	Start				End
1	5	Tournament West Coast And Mykonos Open 2025				Tournament Western Cape Schools Individual Championship 2025
		date 2025-05-04	rnd 5	type Standard	result 1	date 2025-05-17	rnd 3	type Standard	result 1
		Opponent Green, L (Lyndon)				Opponent Kudiyarov, M (Maxim)
2	5	Tournament St. Helena Bay Chess Club Open 2024				Tournament West Coast Schools Chess Prestige 2025
		date 2024-12-07	rnd 5	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Love, C (Celine)				Opponent Andrew, T (Tyron)
3	4	Tournament Pedro Booyse Top Schools Championships 2024				Tournament Western Cape Women�s Championship 2024
		date 2024-07-20	rnd 4	type Standard	result 1	date 2024-08-10	rnd 2	type Standard	result 1
		Opponent Erasmus, H (Heinrich)				Opponent Noble, A (Andrew)

#	Games	Start				End
1	11	Tournament Basil Ellman Annual Rapid 2022				Tournament West Coast Chess Open 2022
		date 2022-06-25	rnd 5	type Rapid	result 1	date 2022-10-15	rnd 5	type Rapid	result 1
		Opponent Olivier, M (Micarlo)				Opponent Fester, C (Cassidy)
2	7	Tournament Lower West Coast Top Schools 2025				Tournament Pedro Booyse Top Schools 2025
		date 2025-06-14	rnd 3	type Rapid	result 1	date 2025-08-23	rnd 5	type Rapid	result 1
		Opponent Willemse, S (Schalk)				Opponent Willems, H (Hyron)
3	7	Tournament Lower West Coast Primary Schools Prestige Championships 2023				Tournament WCCI Open 2023
		date 2023-03-04	rnd 1	type Rapid	result 1	date 2023-04-29	rnd 2	type Rapid	result 1
		Opponent Chipoka, S (Sasha)				Opponent Love, C (Celine)

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	Noble ,A (Andrew)	7	3.5	0	2	2	425	5	1.5	-170	0	0	0
1	Noble ,A (Andrew)	7	1493.8	1493.8	2	1464.5	1918.8	5	1508.4	1323.8	0	0	0
2	Love ,C (Celine)	7	3.5	0	2	1	0	5	2.5	0	0	0	0
2	Love ,C (Celine)	7	1300.2	1300.2	2	1252.6	1300.2	5	1343.7	1300.2	0	0	0
3	Willemse ,S (Schalk)	5	3	85	2	1	0	3	2	141.7	0	0	0
3	Willemse ,S (Schalk)	5	1474.3	1559.3	2	1444.8	1474.3	3	1421.3	1616	0	0	0
4	Siebritz ,Y (Yul)	5	3.5	170	0	0	0	5	3.5	170	0	0	0
4	Siebritz ,Y (Yul)	5	1249.8	1419.8	0	0	0	5	1244.3	1419.8	0	0	0
5	Brink ,A (Andrew)	4	2.5	106.2	4	2.5	106.2	0	0	0	0	0	0
5	Brink ,A (Andrew)	4	1668.3	1774.6	4	1671.6	1774.6	0	0	0	0	0	0
6	Koopman ,V (Virat)	4	2.5	106.2	1	1	425	3	1.5	0	0	0	0
6	Koopman ,V (Virat)	4	1240.8	1347.1	1	1238	1665.8	3	1250.7	1240.8	0	0	0
7	Ellman ,A (Andries)	4	4	425	0	0	0	4	4	425	0	0	0
7	Ellman ,A (Andries)	4	1149.6	1574.6	0	0	0	4	1178.8	1574.6	0	0	0
8	Arendse ,Q (Quinwinne)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
8	Arendse ,Q (Quinwinne)	3	1413.1	1271.5	3	1384.2	1271.5	0	0	0	0	0	0
9	Erasmus ,H (Heinrich)	3	3	425	1	1	425	2	2	425	0	0	0
9	Erasmus ,H (Heinrich)	3	1224.9	1649.9	1	1224.1	1649.9	2	1197	1649.9	0	0	0
10	Olivier ,M (Micarlo)	3	3	425	1	1	425	2	2	425	0	0	0
10	Olivier ,M (Micarlo)	3	1290.2	1715.2	1	1321.6	1715.2	2	1236.7	1715.2	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Klaasens, J (Jemaine)

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms