Chess South Africa Ratings Database

PLAYER PAGE

Personal

Jantjies, C (Chelsey)

Chess SA id

2090320275

FIDE id

Date of birth

2009-08-06 (U18)

Gender

Female

Region

Namakwa (NCN)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-12-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1188.1	1197.3	1180	1200
Raw rating	1121.1	1139.6	1145.6	1200
Weighted rating	1188.1	1197.3	1180	1200
Weighted performance	0	0	0	0
Floor	699.9	709.1	700	700
K-factor	40	36	36	36
Min/Max rating change allowed	185.5	180.7	179.2	165.8
Highest rating	1199.9 2025-05-13	1209.1 2025-09-01	1200 2025-06-01	1200 2025-06-01
Highest raw rating	1199.9 2025-05-13	1209.1 2025-09-01	1200 2025-06-01	1200 2025-06-01
Highest weighted rating	1199.9 2025-05-13	1200.2 2025-09-01	1200 2025-06-01	1200 2025-06-01
Highest weighted performance	0 1900-01-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-5.8	-4.7	-3.4	0
New rating	1182.3	1192.6	1176.6	1200
Analysis
Rating	1188.1	1197.3	1180	1200
Raw rating	1121.1	1139.6	1145.6	1200
Weighted rating	1188.1	1197.3	1180
Weighted performance	0	0	0
K-factor	40	36	36	36
Floor	699.9	709.1	700	700
Max/Min rating change allowed	185.5	180.7	179.2	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	1121.1	1139.6	1145.6	1200
New weighted rating	1182.3	1192.6	1176.6	1200
New weighted performance	0	0	0	0
Temp new rating	1182.3	1192.6	1176.6	1200
Temp new rating +/-	-5.8	-4.7	-3.4	0
Final new rating +/-	-5.8	-4.7	-3.4	0
New rating	1182.3	1192.6	1176.6	1200
New K-factor	40	36	36	36
New floor	699.9	709.1	700	700

Item	Main	Standard	Rapid
	0	0	0
	20	10	10
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	20	10	10

Games since
	Main 20	Standard 10		Rapid 10		Blitz 0
Gender	Female
Age group	U18
Region	Namakwa (NCN)
Province	Northern Cape (NC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 Female	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
U18	-1		-1		-1
U18 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	20	6.5	32.5	-148.8	1207	1058.3
Standard	10	3	30	-170	1221.4	1051.4
Rapid	10	3.5	35	-127.5	1192.6	1065.1
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	20	6.5	32.5	-148.8	1207	1058.3
Standard	10	3	30	-170	1221.4	1051.4
Rapid	10	3.5	35	-127.5	1192.6	1065.1
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1121.1	1139.6	1145.6	1200
2025-11-30	1181.9	1209.1	1145.6	1200
2025-11-01	1181.9	1209.1	1145.6	1200
2025-09-30	1181.9	1209.1	1145.6	1200
2025-09-01	1181.9	1209.1	1145.6	1200
2025-08-01	1199.5	1199.4	1200	1200
2025-07-01	1199.2	1199	1200	1200
2025-06-01	1194.8	1193.8	1200	1200
2025-05-01	1200	1200	1200	1200
2025-04-01	1200	1200	1200	1200
2025-03-01	1200	1200	1200	1200
2025-02-01	1200	1200	1200	1200
2025-01-01	1200	1200	1200	1200
2024-12-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-10-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	1200	1200
2024-05-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	1200	1200
2024-02-01	1200	1200	1200	1200

Comming soon.

Tournaments

History

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

No tournaments found.

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	2025 Mzansi Inter Provincial Team Championships (U18 Girls)	2025-12-15	2025-12-16	Standard	Nelson Mandela Bay (ENM)	5	5	0	Yes	Analysis
2	Northern Cape Closed 202 (U18 Girls)	2025-08-22	2025-08-23	Standard	ZF Mgcawu (NZF)	5	5	2.5	Yes	Analysis
3	Namakwa Toernooi 3 2025 (U18)	2025-08-09	2025-08-09	Rapid	Namakwa (NCN)	10	10	3.5	Yes	Analysis
4	2025 Namakwa Skaak Toernoei 2.0 (U16)	2025-05-10	2025-05-10	Standard	Namakwa (NCN)	5	5	0.5	Yes	Analysis

#	Games	Start				End
1	2	Tournament Northern Cape Closed 202				Tournament Northern Cape Closed 202
		date 2025-08-23	rnd 3	type Standard	result 1	date 2025-08-23	rnd 4	type Standard	result 0.5
		Opponent Van Staden, C (Caylin)				Opponent Andrews, A (Amber)
2	2	Tournament Namakwa Toernooi 3 2025				Tournament Namakwa Toernooi 3 2025
		date 2025-08-09	rnd 6	type Rapid	result 0.5	date 2025-08-09	rnd 7	type Rapid	result 1
		Opponent Steenkamp, C (Christin)				Opponent Malgas, I (Ireesha)
3	2	Tournament Namakwa Toernooi 3 2025				Tournament Namakwa Toernooi 3 2025
		date 2025-08-09	rnd 3	type Rapid	result 1	date 2025-08-09	rnd 4	type Rapid	result 1
		Opponent Ruiters, R (Rayford)				Opponent Warne, N (Nazeem)

#	Games	Start				End
1	2	Tournament Northern Cape Closed 202				Tournament Northern Cape Closed 202
		date 2025-08-23	rnd 3	type Standard	result 1	date 2025-08-23	rnd 4	type Standard	result 0.5
		Opponent Van Staden, C (Caylin)				Opponent Andrews, A (Amber)
2	1	Tournament Northern Cape Closed 202				Tournament Northern Cape Closed 202
		date 2025-08-22	rnd 1	type Standard	result 1	date 2025-08-22	rnd 1	type Standard	result 1
		Opponent Setlhare, B (Bokao)				Opponent Setlhare, B (Bokao)
3	1	Tournament 2025 Namakwa Skaak Toernoei 2.0				Tournament 2025 Namakwa Skaak Toernoei 2.0
		date 2025-05-10	rnd 4	type Standard	result 0.5	date 2025-05-10	rnd 4	type Standard	result 0.5
		Opponent Harmse, D (Devon)				Opponent Harmse, D (Devon)

#	Games	Start				End
1	2	Tournament Namakwa Toernooi 3 2025				Tournament Namakwa Toernooi 3 2025
		date 2025-08-09	rnd 6	type Rapid	result 0.5	date 2025-08-09	rnd 7	type Rapid	result 1
		Opponent Steenkamp, C (Christin)				Opponent Malgas, I (Ireesha)
2	2	Tournament Namakwa Toernooi 3 2025				Tournament Namakwa Toernooi 3 2025
		date 2025-08-09	rnd 3	type Rapid	result 1	date 2025-08-09	rnd 4	type Rapid	result 1
		Opponent Ruiters, R (Rayford)				Opponent Warne, N (Nazeem)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Namakwa Toernooi 3 2025				Tournament Namakwa Toernooi 3 2025
		date 2025-08-09	rnd 3	type Rapid	result 1	date 2025-08-09	rnd 4	type Rapid	result 1
		Opponent Ruiters, R (Rayford)				Opponent Warne, N (Nazeem)
2	1	Tournament Northern Cape Closed 202				Tournament Northern Cape Closed 202
		date 2025-08-23	rnd 3	type Standard	result 1	date 2025-08-23	rnd 3	type Standard	result 1
		Opponent Van Staden, C (Caylin)				Opponent Van Staden, C (Caylin)
3	1	Tournament Northern Cape Closed 202				Tournament Northern Cape Closed 202
		date 2025-08-22	rnd 1	type Standard	result 1	date 2025-08-22	rnd 1	type Standard	result 1
		Opponent Setlhare, B (Bokao)				Opponent Setlhare, B (Bokao)

#	Games	Start				End
1	1	Tournament Northern Cape Closed 202				Tournament Northern Cape Closed 202
		date 2025-08-23	rnd 3	type Standard	result 1	date 2025-08-23	rnd 3	type Standard	result 1
		Opponent Van Staden, C (Caylin)				Opponent Van Staden, C (Caylin)
2	1	Tournament Northern Cape Closed 202				Tournament Northern Cape Closed 202
		date 2025-08-22	rnd 1	type Standard	result 1	date 2025-08-22	rnd 1	type Standard	result 1
		Opponent Setlhare, B (Bokao)				Opponent Setlhare, B (Bokao)

#	Games	Start				End
1	2	Tournament Namakwa Toernooi 3 2025				Tournament Namakwa Toernooi 3 2025
		date 2025-08-09	rnd 3	type Rapid	result 1	date 2025-08-09	rnd 4	type Rapid	result 1
		Opponent Ruiters, R (Rayford)				Opponent Warne, N (Nazeem)
2	1	Tournament Namakwa Toernooi 3 2025				Tournament Namakwa Toernooi 3 2025
		date 2025-08-09	rnd 7	type Rapid	result 1	date 2025-08-09	rnd 7	type Rapid	result 1
		Opponent Malgas, I (Ireesha)				Opponent Malgas, I (Ireesha)

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	Ruiters ,R (Rayford)	2	1	0	1	0	-425	1	1	425	0	0	0
1	Ruiters ,R (Rayford)	2	1199.9	1199.9	1	1200	774.9	1	1200	1624.9	0	0	0
2	Peters ,C (Chante)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Peters ,C (Chante)	1	1252.2	827.2	1	1256.8	827.2	0	0	0	0	0	0
3	Andrews ,A (Amber)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
3	Andrews ,A (Amber)	1	1163.3	1163.3	1	1162.6	1163.3	0	0	0	0	0	0
4	Smit ,I (Isabella)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Smit ,I (Isabella)	1	1204.3	779.3	1	1206	779.3	0	0	0	0	0	0
5	Harmse ,D (Devon)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
5	Harmse ,D (Devon)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
6	Setlhare ,B (Bokao)	1	1	425	1	1	425	0	0	0	0	0	0
6	Setlhare ,B (Bokao)	1	1337.8	1762.8	1	1358.2	1762.8	0	0	0	0	0	0
7	Vorster ,CE (Cayleigh Estelle)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Vorster ,CE (Cayleigh Estelle)	1	1257.1	832.1	1	1264.2	832.1	0	0	0	0	0	0
8	Marais ,O (Oshman)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Marais ,O (Oshman)	1	1200	775	1	1200	775	0	0	0	0	0	0
9	Van Staden ,C (Caylin)	1	1	425	1	1	425	0	0	0	0	0	0
9	Van Staden ,C (Caylin)	1	1199.5	1624.5	1	1199.4	1624.5	0	0	0	0	0	0
10	Van Der Westhuizen ,J (Juandre)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Van Der Westhuizen ,J (Juandre)	1	1200	775	1	1200	775	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Jantjies, C (Chelsey)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms