Chess South Africa Ratings Database

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Personal

Bolton, NA (Naomi)

Chess SA id

280038951

FIDE id

Date of birth

1980-10-11 (Adult)

Gender

Female

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-11-29

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1368.5	1360.8	1284.9	1302
Raw rating	1368.5	1360.8	1284.9	1302
Weighted rating	1354.4	1359.2	1264.2	1302
Weighted performance	1274.8	1263.4	0	0
Floor	878.9	882.7	802	802
K-factor	36	36	36	36
Min/Max rating change allowed	130.4	131.9	146.9	143.4
Highest rating	1378.9 2025-04-01	1517.1 2024-09-01	1302 2024-02-01	1302 2024-02-01
Highest raw rating	1378.9 2025-04-01	1382.7 2024-12-01	1302 2024-02-01	1302 2024-02-01
Highest weighted rating	1354.4 2026-01-01	1359.2 2026-01-01	1302 2024-06-01	1298.6 2025-08-01
Highest weighted performance	1371.4 2025-04-01	1517.1 2024-09-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-13.6	-3.1	0	0
New rating	1354.9	1357.7	1284.9	1302
Analysis
Rating	1368.5	1360.8	1284.9	1302
Raw rating	1368.5	1360.8	1284.9	1302
Weighted rating	1354.4	1359.2	1264.2
Weighted performance	1274.8	1263.4	0
K-factor	36	36	36	36
Floor	878.9	882.7	802	802
Max/Min rating change allowed	130.4	131.9	146.9	143.4
Games	5	5	0	0
Score	2	2	0	0
Expected score	2.79	2.96	0	0
Score-Expected	-0.79	-0.96	0	0
Temp raw +/-	-28.4	-34.6	0	0
Final raw +/-	-28.4	-34.6	0	0
New raw rating	1340.1	1326.2	1284.9	1302
New weighted rating	1354.9	1357.7	1266.4	1302
New weighted performance	1250.6	1237.1	0	0
Temp new rating	1354.9	1357.7	1284.9	1302
Temp new rating +/-	-13.6	-3.1	0	0
Final new rating +/-	-13.6	-3.1	0	0
New rating	1354.9	1357.7	1284.9	1302
New K-factor	36	36	36	36
New floor	878.9	882.7	802	802

Item	Main	Standard	Rapid
	0	0	0
	19	12	7
	36	19	17
	0	0	0
	0	0	0
	0	0	0
History	55	31	24

Games since
	Main 55	Standard 31		Rapid 24		Blitz 0
Gender	Female
Age group	Adult
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	2521		798		350
Female	448		174		65
Adult	553		173		110
Adult Female	29		15		11
Standard
	RSA		Province		Region
Overall	2514		710		322
Female	457		168		64
Adult	507		124		93
Adult Female	30		13		9
Rapid
	RSA		Province		Region
Overall	1168		590		242
Female	198		113		30
Adult	215		82		52
Adult Female	3		3		1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Female	-1		-1		-1
Adult	-1		-1		-1
Adult 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	19	10.5	55.26	44.7	1357.4	1402.2
Standard	12	7.5	62.5	106.2	1266.3	1372.5
Rapid	7	3	42.86	-60.7	1513.7	1453
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	55	28.5	51.82	15.5	1346.1	1361.6
Standard	31	19.5	62.9	109.7	1295.7	1405.4
Rapid	24	9	37.5	-106.2	1411.3	1305
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1368.5	1360.8	1284.9	1302
2025-11-30	1368.8	1361.8	1284.9	1302
2025-11-01	1368.8	1361.8	1284.9	1302
2025-09-30	1378.9	1374.1	1284.9	1302
2025-09-01	1378.9	1374.1	1284.9	1302
2025-08-01	1378.9	1374.1	1284.9	1302
2025-07-01	1378.9	1374.1	1284.9	1302
2025-06-01	1378.9	1374.1	1284.9	1302
2025-05-01	1378.9	1374.1	1284.9	1302
2025-04-01	1378.9	1374.1	1284.9	1302
2025-03-01	1344.9	1354.3	1229.9	1302
2025-02-01	1344.9	1354.3	1228.7	1302
2025-01-01	1344.9	1354.3	1218.1	1302
2024-12-01	1352.1	1382.7	1218.1	1302
2024-11-01	1320.4	1357.1	1218.1	1302
2024-10-01	1320.4	1357.1	1218.1	1302
2024-09-01	1264	1302	1218.1	1302
2024-11-01	1264	1302	1218.1	1302
2024-07-01	1264	1302	1218.1	1302
2024-06-01	1264	1302	1218.1	1302
2024-05-01	1266	1302	1217	1302
2024-04-01	1302	1302	1302	1302
2024-03-01	1302	1302	1302	1302
2024-02-01	1302	1302	1302	1302

Comming soon.

Tournaments

History

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Helderberg Chess Club Open 2026 (B)	2026-01-17	2026-01-17	Standard	Cape Town (WCT)	5	5	2	Yes	Analysis

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Helderberg Chess Club Open 2026 (B)	2026-01-17	2026-01-17	Standard	Cape Town (WCT)	5	5	2	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Helderberg Chess Club Open 2026 (B)	2026-01-17	2026-01-17	Standard	Cape Town (WCT)	5	5	2	Yes	Analysis
2	A & A Invitational Chess Tournament 2025 (Open)	2025-11-29	2025-11-29	Standard	Cape Town (WCT)	5	5	2	Yes	Analysis
3	Cape Town Chess Federation Club League 2025 (D)	2025-07-26	2025-09-27	Standard	Cape Town (WCT)	11	6	3.5	Yes	Analysis
4	Cape Town Open Chess Festival 2025 (C)	2025-03-22	2025-03-23	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
5	Steinitz Festival 2025 (Open)	2025-03-15	2025-03-15	Rapid	Cape Town (WCT)	7	7	3	Yes	Analysis
6	Mzansi Interprovincial Youth Chess Championships 2024 (Adult Ladies Combined)	2024-12-16	2024-12-19	Standard	Capricorn (LCP)	7	7	3.5	Yes	Analysis
7	Helderberg Chess Club Open 2024 (B)	2024-11-09	2024-11-10	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
8	CT League 2024 (D)	2024-08-03	2024-08-03	Standard	Cape Town (WCT)	6	6	4.5	Yes	Analysis
9	Curro Durbanville Chess Rapid Open 2024 (Intermediate)	2024-07-13	2024-07-13	Rapid	Cape Town (WCT)	6	5	3	Yes	Analysis
10	Steinitz Chess Festival 2024 (Open Rapid)	2024-05-11	2024-05-11	Rapid	Cape Town (WCT)	6	6	2	Yes	Analysis
11	Hermanus Chess Club Open 2024 (Intermediate)	2024-04-20	2024-04-20	Rapid	Overberg (WOS)	7	6	1	Yes	Analysis

#	Games	Start				End
1	6	Tournament CT League 2024				Tournament Helderberg Chess Club Open 2024
		date 2024-08-03	rnd 2	type Standard	result 1	date 2024-11-09	rnd 1	type Standard	result 1
		Opponent Sihamba, S (Somila)				Opponent Cordier, L (Louis)
2	4	Tournament Cape Town Open Chess Festival 2025				Tournament Cape Town Open Chess Festival 2025
		date 2025-03-22	rnd 1	type Standard	result 0.5	date 2025-03-23	rnd 4	type Standard	result 0.5
		Opponent Ali, U (Usher)				Opponent Ziegers, CN (Chad Neil)
3	3	Tournament Cape Town Open Chess Festival 2025				Tournament Cape Town Chess Federation Club League 2025
		date 2025-03-23	rnd 6	type Standard	result 1	date 2025-08-16	rnd 4	type Standard	result 1
		Opponent Brink, K (Kiran)				Opponent Mtwala, P (Philasande)

#	Games	Start				End
1	6	Tournament Mzansi Interprovincial Youth Chess Championships 2024				Tournament Cape Town Open Chess Festival 2025
		date 2024-12-18	rnd 6	type Standard	result 1	date 2025-03-23	rnd 4	type Standard	result 0.5
		Opponent Gulwa, Z (Zintle)				Opponent Ziegers, CN (Chad Neil)
2	6	Tournament CT League 2024				Tournament Helderberg Chess Club Open 2024
		date 2024-08-03	rnd 2	type Standard	result 1	date 2024-11-09	rnd 1	type Standard	result 1
		Opponent Sihamba, S (Somila)				Opponent Cordier, L (Louis)
3	3	Tournament Helderberg Chess Club Open 2024				Tournament Mzansi Interprovincial Youth Chess Championships 2024
		date 2024-11-10	rnd 6	type Standard	result 1	date 2024-12-16	rnd 2	type Standard	result 1
		Opponent Marais, A (Alexander)				Opponent Mitchells, J (Jamie-Lee)

#	Games	Start				End
1	3	Tournament Curro Durbanville Chess Rapid Open 2024				Tournament Curro Durbanville Chess Rapid Open 2024
		date 2024-07-13	rnd 2	type Rapid	result 1	date 2024-07-13	rnd 4	type Rapid	result 1
		Opponent Bolton, A (Alyssa)				Opponent Budge, B (Benjamin)
2	2	Tournament Steinitz Festival 2025				Tournament Steinitz Festival 2025
		date 2025-03-15	rnd 2	type Rapid	result 1	date 2025-03-15	rnd 3	type Rapid	result 1
		Opponent Hong, D (Devon)				Opponent Johnson, B (Brian)
3	1	Tournament Steinitz Festival 2025				Tournament Steinitz Festival 2025
		date 2025-03-15	rnd 6	type Rapid	result 1	date 2025-03-15	rnd 6	type Rapid	result 1
		Opponent Page, R (Romayo)				Opponent Page, R (Romayo)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament CT League 2024				Tournament Helderberg Chess Club Open 2024
		date 2024-08-03	rnd 4	type Standard	result 1	date 2024-11-09	rnd 1	type Standard	result 1
		Opponent Panduva, O (Ongeza)				Opponent Cordier, L (Louis)
2	3	Tournament Helderberg Chess Club Open 2024				Tournament Mzansi Interprovincial Youth Chess Championships 2024
		date 2024-11-10	rnd 6	type Standard	result 1	date 2024-12-16	rnd 2	type Standard	result 1
		Opponent Marais, A (Alexander)				Opponent Mitchells, J (Jamie-Lee)
3	3	Tournament Curro Durbanville Chess Rapid Open 2024				Tournament Curro Durbanville Chess Rapid Open 2024
		date 2024-07-13	rnd 2	type Rapid	result 1	date 2024-07-13	rnd 4	type Rapid	result 1
		Opponent Bolton, A (Alyssa)				Opponent Budge, B (Benjamin)

#	Games	Start				End
1	4	Tournament CT League 2024				Tournament Helderberg Chess Club Open 2024
		date 2024-08-03	rnd 4	type Standard	result 1	date 2024-11-09	rnd 1	type Standard	result 1
		Opponent Panduva, O (Ongeza)				Opponent Cordier, L (Louis)
2	3	Tournament Helderberg Chess Club Open 2024				Tournament Mzansi Interprovincial Youth Chess Championships 2024
		date 2024-11-10	rnd 6	type Standard	result 1	date 2024-12-16	rnd 2	type Standard	result 1
		Opponent Marais, A (Alexander)				Opponent Mitchells, J (Jamie-Lee)
3	2	Tournament Cape Town Open Chess Festival 2025				Tournament Cape Town Open Chess Festival 2025
		date 2025-03-22	rnd 2	type Standard	result 1	date 2025-03-22	rnd 3	type Standard	result 1
		Opponent Butau, C (Claude)				Opponent Herder, J (Jovanne)

#	Games	Start				End
1	3	Tournament Curro Durbanville Chess Rapid Open 2024				Tournament Curro Durbanville Chess Rapid Open 2024
		date 2024-07-13	rnd 2	type Rapid	result 1	date 2024-07-13	rnd 4	type Rapid	result 1
		Opponent Bolton, A (Alyssa)				Opponent Budge, B (Benjamin)
2	2	Tournament Steinitz Festival 2025				Tournament Steinitz Festival 2025
		date 2025-03-15	rnd 2	type Rapid	result 1	date 2025-03-15	rnd 3	type Rapid	result 1
		Opponent Hong, D (Devon)				Opponent Johnson, B (Brian)
3	1	Tournament Steinitz Festival 2025				Tournament Steinitz Festival 2025
		date 2025-03-15	rnd 6	type Rapid	result 1	date 2025-03-15	rnd 6	type Rapid	result 1
		Opponent Page, R (Romayo)				Opponent Page, R (Romayo)

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	Esterhuysen ,S (Sebastian)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Esterhuysen ,S (Sebastian)	1	1216.3	791.3	1	1183	791.3	0	0	0	0	0	0
2	Brown ,JR (John-Rodney)	1	1	425	1	1	425	0	0	0	0	0	0
2	Brown ,JR (John-Rodney)	1	1383.3	1808.3	1	1370.7	1808.3	0	0	0	0	0	0
3	Marais ,A (Alexander)	1	1	425	1	1	425	0	0	0	0	0	0
3	Marais ,A (Alexander)	1	1455.2	1880.2	1	1388.5	1880.2	0	0	0	0	0	0
4	Brink ,K (Kiran)	1	1	425	1	1	425	0	0	0	0	0	0
4	Brink ,K (Kiran)	1	1239.2	1664.2	1	1285.5	1664.2	0	0	0	0	0	0
5	Mtwala ,P (Philasande)	1	1	425	1	1	425	0	0	0	0	0	0
5	Mtwala ,P (Philasande)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	Ali ,U (Usher)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
6	Ali ,U (Usher)	1	1194.8	1194.8	1	1177.7	1194.8	0	0	0	0	0	0
7	Billett ,L (Lauren)	1	1	425	1	1	425	0	0	0	0	0	0
7	Billett ,L (Lauren)	1	1065.6	1490.6	1	1050.1	1490.6	0	0	0	0	0	0
8	Van Den Bergh ,M (Marilene)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Van Den Bergh ,M (Marilene)	1	1502.2	1077.2	1	1493.7	1077.2	0	0	0	0	0	0
9	Cordier ,L (Louis)	1	1	425	1	1	425	0	0	0	0	0	0
9	Cordier ,L (Louis)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
10	Panduva ,O (Ongeza)	1	1	425	1	1	425	0	0	0	0	0	0
10	Panduva ,O (Ongeza)	1	1123	1548	1	1117.6	1548	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Bolton, NA (Naomi)

Ratings

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Last 24 raw ratings

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Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms