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

2025-08-23

Personal details last changed

1900-01-01

Junior GPX Games

12.8

Junior GPX Points

955.9

Item	Main	Standard	Rapid	Blitz
Rating	1196.7	1209.1	1191.5	1200
Raw rating	1181.9	1209.1	1145.6	1200
Weighted rating	1196.7	1200.9	1191.5	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	170.2	163.7	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	-1.3	0	-4	0
New rating	1195.4	1209.1	1187.5	1200
Analysis
Rating	1196.7	1209.1	1191.5	1200
Raw rating	1181.9	1209.1	1145.6	1200
Weighted rating	1196.7	1200.9	1191.5
Weighted performance	0	0	0
K-factor	40	36	36	36
Floor	699.9	709.1	700	700
Max/Min rating change allowed	170.2	163.7	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	1181.9	1209.1	1145.6	1200
New weighted rating	1195.4	1201.6	1187.5	1200
New weighted performance	0	0	0	0
Temp new rating	1195.4	1209.1	1187.5	1200
Temp new rating +/-	-1.3	0	-4	0
Final new rating +/-	-1.3	0	-4	0
New rating	1195.4	1209.1	1187.5	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
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
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	1200	1200	1200	1200
2024-08-01	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
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	1200	1200
2023-11-01	1200	1200	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	Northern Cape Closed 202 (U18 Girls)	2025-08-22	2025-08-23	Standard	ZF Mgcawu (NZF)	5	5	2.5	Yes	Analysis
2	Namakwa Toernooi 3 2025 (U18)	2025-08-09	2025-08-09	Rapid	Namakwa (NCN)	10	10	3.5	Yes	Analysis
3	2025 Namakwa Skaak Toernoei 2.0 (U16)	2025-05-10	2025-05-10	Standard	Namakwa (NCN)	5	5	0.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Northern Cape Closed 202 (U18 Girls)	2025-08-22	2025-08-23	Standard	ZF Mgcawu (NZF)	5	5	2.5	Yes	Analysis
2	Namakwa Toernooi 3 2025 (U18)	2025-08-09	2025-08-09	Rapid	Namakwa (NCN)	10	10	3.5	Yes	Analysis
3	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

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Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms