Chess South Africa Ratings Database

PLAYER PAGE

Personal

Weder, K (Karlien)

Chess SA id

2120139975

FIDE id

Date of birth

2012-01-31 (U14)

Gender

Female

Region

Tshwane (GTP)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-15

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1522	1525.3	1200	1200
Raw rating	1522	1525.3	1200	1200
Weighted rating	1490.6	1487.3	1200	1200
Weighted performance	1402.2	1396.7	0	0
Floor	1022	1025.3	700	700
K-factor	32	32	36	36
Min/Max rating change allowed	104.8	104.3	165.8	165.8
Highest rating	1522 2025-09-01	1525.3 2025-09-01	1209 2022-04-01	1200 2018-10-01
Highest raw rating	1522 2025-09-01	1525.3 2025-09-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1486.5 2025-09-01	1482.2 2025-09-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1491.9 2024-01-01	1523.1 2023-08-01	1209 2022-04-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1522	1525.3	1200	1200
Analysis
Rating	1522	1525.3	1200	1200
Raw rating	1522	1525.3	1200	1200
Weighted rating	1490.6	1487.3	1200
Weighted performance	1402.2	1396.7	0
K-factor	32	32	36	36
Floor	1022	1025.3	700	700
Max/Min rating change allowed	104.8	104.3	165.8	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	1522	1525.3	1200	1200
New weighted rating	1494.3	1491.9	1200	1200
New weighted performance	1401.7	1396.2	0	0
Temp new rating	1522	1525.3	1200	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1522	1525.3	1200	1200
New K-factor	32	32	36	36
New floor	1022	1025.3	700	700

Item	Main	Standard	Rapid
	0	0	0
	5	5	0
	14	14	0
	20	20	0
	6	0	6
	0	0	0
History	45	39	6

Games since
	Main 19	Standard 19		Rapid 0		Blitz 0
Gender	Female
Age group	U14
Region	Tshwane (GTP)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U14	-1		-1		-1
U14 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	4.5	90	340	1345.1	1685.1
Standard	5	4.5	90	340	1345.1	1685.1
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	45	34.5	76.67	226.7	1243.8	1470.4
Standard	39	31.5	80.77	261.5	1259.4	1521
Rapid	6	3	50	0	1141.9	1141.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1522	1525.3	1200	1200
2025-09-01	1522	1525.3	1200	1200
2025-08-01	1490.2	1486.9	1200	1200
2025-07-01	1490.2	1486.9	1200	1200
2025-06-01	1490.2	1486.9	1200	1200
2025-05-01	1490.2	1486.9	1200	1200
2025-04-01	1490.2	1486.9	1200	1200
2025-03-01	1490.2	1486.9	1200	1200
2025-02-01	1490.2	1486.9	1200	1200
2025-01-01	1490.2	1486.9	1200	1200
2024-12-01	1490.2	1486.9	1200	1200
2024-11-01	1490.2	1486.9	1200	1200
2024-10-01	1490.2	1486.9	1200	1200
2024-09-01	1478.5	1474.1	1200	1200
2024-08-01	1478.5	1474.1	1200	1200
2024-07-01	1478.5	1474.1	1200	1200
2024-06-01	1478.5	1474.1	1200	1200
2024-08-01	1475.6	1470.3	1200	1200
2024-04-01	1475.6	1470.3	1200	1200
2024-03-01	1475.6	1470.3	1200	1200
2024-02-01	1475.6	1470.3	1200	1200
2024-01-01	1389.3	1349.7	1200	1200
2023-12-01	1389.3	1349.7	1200	1200
2023-11-01	1389.3	1349.7	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	2025 Tshwane South School District CLOSED League Championship (U13A)	2025-08-15	2025-08-15	Standard	Tshwane (GTP)	5	5	4.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Tshwane South School District CLOSED League Championship (U13A)	2025-08-15	2025-08-15	Standard	Tshwane (GTP)	5	5	4.5	Yes	Analysis
2	Gauteng Schools Individuals Finals 2024 (U13 Girls)	2024-08-16	2024-08-16	Standard	Ekurhuleni (GE)	5	5	4	Yes	Analysis
3	2024 Tshwane South School District CLOSED Individual Championships (U13 Girls)	2024-05-11	2024-05-11	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
4	2024 Gauteng Inter-Region Chess Championship (U14 Girls)	2024-01-13	2024-01-14	Standard	Tshwane (GTP)	5	4	4	Yes	Analysis
5	2023 Alekhine Open Tournament (D)	2023-09-09	2023-09-09	Standard	Tshwane (GTP)	5	5	3.5	Yes	Analysis
6	2023 Gauteng Top Schools (U11 Mixed)	2023-08-18	2023-08-18	Standard	West Rand (GWR)	5	5	5	Yes	Analysis
7	2023 Tshwane South School District CLOSED League Championship (U11)	2023-07-29	2023-07-29	Standard	Tshwane (GTP)	5	5	4	Yes	Analysis
8	2023 Tshwane South School District CLOSED Individual Championships (U11 Girls)	2023-04-22	2023-04-22	Standard	Tshwane (GTP)	5	5	3	Yes	Analysis
9	D4 Individuals 2022 (U11 Girls)	2022-04-23	2022-04-23	Rapid	Tshwane (GTP)	7	6	3	Yes	Analysis

#	Games	Start				End
1	14	Tournament 2023 Tshwane South School District CLOSED Individual Championships				Tournament 2023 Alekhine Open Tournament
		date 2023-04-22	rnd 4	type Standard	result 1	date 2023-09-09	rnd 2	type Standard	result 0.5
		Opponent Kirstein, M (Mine)				Opponent Makaleng, K (Kgothatso)
2	7	Tournament 2023 Alekhine Open Tournament				Tournament 2024 Tshwane South School District CLOSED Individual Championships
		date 2023-09-09	rnd 4	type Standard	result 1	date 2024-05-11	rnd 1	type Standard	result 1
		Opponent De Jager, J (Jandre)				Opponent Webb, A (Abbygail)
3	6	Tournament Gauteng Schools Individuals Finals 2024				Tournament 2025 Tshwane South School District CLOSED League Championship
		date 2024-08-16	rnd 5	type Standard	result 1	date 2025-08-15	rnd 5	type Standard	result 1
		Opponent Padayachy, V (Vidya)				Opponent Mawalall, A (Ayush)

#	Games	Start				End
1	14	Tournament 2023 Tshwane South School District CLOSED Individual Championships				Tournament 2023 Alekhine Open Tournament
		date 2023-04-22	rnd 4	type Standard	result 1	date 2023-09-09	rnd 2	type Standard	result 0.5
		Opponent Kirstein, M (Mine)				Opponent Makaleng, K (Kgothatso)
2	7	Tournament 2023 Alekhine Open Tournament				Tournament 2024 Tshwane South School District CLOSED Individual Championships
		date 2023-09-09	rnd 4	type Standard	result 1	date 2024-05-11	rnd 1	type Standard	result 1
		Opponent De Jager, J (Jandre)				Opponent Webb, A (Abbygail)
3	6	Tournament Gauteng Schools Individuals Finals 2024				Tournament 2025 Tshwane South School District CLOSED League Championship
		date 2024-08-16	rnd 5	type Standard	result 1	date 2025-08-15	rnd 5	type Standard	result 1
		Opponent Padayachy, V (Vidya)				Opponent Mawalall, A (Ayush)

#	Games	Start				End
1	2	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 3	type Rapid	result 1	date 2022-04-23	rnd 4	type Rapid	result 1
		Opponent Pistorius, A (Anabelle)				Opponent Beetge, A (Anabelle)
2	1	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 7	type Rapid	result 1	date 2022-04-23	rnd 7	type Rapid	result 1
		Opponent Posthumus, Z (Zane)				Opponent Posthumus, Z (Zane)

No games found.

#	Games	Start				End

#	Games	Start				End
1	7	Tournament 2023 Alekhine Open Tournament				Tournament 2024 Tshwane South School District CLOSED Individual Championships
		date 2023-09-09	rnd 4	type Standard	result 1	date 2024-05-11	rnd 1	type Standard	result 1
		Opponent De Jager, J (Jandre)				Opponent Webb, A (Abbygail)
2	7	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Alekhine Open Tournament
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-09-09	rnd 1	type Standard	result 1
		Opponent Van Der Westhuizen, A (Andru)				Opponent Coetzee, M (Mauritz)
3	4	Tournament 2023 Tshwane South School District CLOSED Individual Championships				Tournament 2023 Tshwane South School District CLOSED League Championship
		date 2023-04-22	rnd 4	type Standard	result 1	date 2023-07-29	rnd 2	type Standard	result 1
		Opponent Kirstein, M (Mine)				Opponent Brand, I (Isabelle)

#	Games	Start				End
1	7	Tournament 2023 Alekhine Open Tournament				Tournament 2024 Tshwane South School District CLOSED Individual Championships
		date 2023-09-09	rnd 4	type Standard	result 1	date 2024-05-11	rnd 1	type Standard	result 1
		Opponent De Jager, J (Jandre)				Opponent Webb, A (Abbygail)
2	7	Tournament 2023 Tshwane South School District CLOSED League Championship				Tournament 2023 Alekhine Open Tournament
		date 2023-07-29	rnd 5	type Standard	result 1	date 2023-09-09	rnd 1	type Standard	result 1
		Opponent Van Der Westhuizen, A (Andru)				Opponent Coetzee, M (Mauritz)
3	4	Tournament 2023 Tshwane South School District CLOSED Individual Championships				Tournament 2023 Tshwane South School District CLOSED League Championship
		date 2023-04-22	rnd 4	type Standard	result 1	date 2023-07-29	rnd 2	type Standard	result 1
		Opponent Kirstein, M (Mine)				Opponent Brand, I (Isabelle)

#	Games	Start				End
1	2	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 3	type Rapid	result 1	date 2022-04-23	rnd 4	type Rapid	result 1
		Opponent Pistorius, A (Anabelle)				Opponent Beetge, A (Anabelle)
2	1	Tournament D4 Individuals 2022				Tournament D4 Individuals 2022
		date 2022-04-23	rnd 7	type Rapid	result 1	date 2022-04-23	rnd 7	type Rapid	result 1
		Opponent Posthumus, Z (Zane)				Opponent Posthumus, Z (Zane)

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	Padayachy ,V (Vidya)	2	1	0	2	1	0	0	0	0	0	0	0
1	Padayachy ,V (Vidya)	2	1268.3	1268.3	2	1263.2	1268.3	0	0	0	0	0	0
2	Ottermann ,E (Erik)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
2	Ottermann ,E (Erik)	2	1241.5	1454	2	1233.4	1454	0	0	0	0	0	0
3	Engelbrecht ,A (Amber-Lee)	2	0.5	-212.5	2	0.5	-212.5	0	0	0	0	0	0
3	Engelbrecht ,A (Amber-Lee)	2	1325.8	1113.3	2	1317.4	1113.3	0	0	0	0	0	0
4	Jansen ,A (Alexia)	2	0	-425	1	0	-425	1	0	-425	0	0	0
4	Jansen ,A (Alexia)	2	1339.3	914.3	1	1375.7	914.3	1	1200	914.3	0	0	0
5	Molefe ,O (Obakeng)	1	1	425	1	1	425	0	0	0	0	0	0
5	Molefe ,O (Obakeng)	1	1217.1	1642.1	1	1221.7	1642.1	0	0	0	0	0	0
6	Truscott ,A (Adriaan)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
6	Truscott ,A (Adriaan)	1	1533.5	1533.5	1	1531	1533.5	0	0	0	0	0	0
7	Van Der Merwe ,L (Liahne Lizl)	1	1	425	1	1	425	0	0	0	0	0	0
7	Van Der Merwe ,L (Liahne Lizl)	1	1398.5	1823.5	1	1393.4	1823.5	0	0	0	0	0	0
8	Makaleng ,K (Kgothatso)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
8	Makaleng ,K (Kgothatso)	1	1206	1206	1	1206.7	1206	0	0	0	0	0	0
9	Kunaka ,M (Mufaro)	1	1	425	1	1	425	0	0	0	0	0	0
9	Kunaka ,M (Mufaro)	1	1182.6	1607.6	1	1173.3	1607.6	0	0	0	0	0	0
10	De Jager ,J (Jandre)	1	1	425	1	1	425	0	0	0	0	0	0
10	De Jager ,J (Jandre)	1	1153	1578	1	1139.7	1578	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

Weder, K (Karlien)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms