Chess South Africa Ratings Database

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Personal

Brewis, S (Sienna)

Chess SA id

2130136581

FIDE id

123104340

Date of birth

2013-02-05 (U14)

Gender

Female

Region

Eden (WEG)

Citizen

RSA

Titles

WRM

Chess SA registered

Last active game

2025-12-20

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1499.1	1548.4	1322.4	1181.8
Raw rating	1499.1	1548.4	1274.3	1180.6
Weighted rating	1492.7	1514.5	1322.4	1181.8
Weighted performance	1488.7	1520.7	1155.1	0
Floor	1113.3	1096	859.2	700
K-factor	28	32	36	36
Min/Max rating change allowed	108.3	100.9	149.2	170.5
Highest rating	1619.5 2022-02-01	1628.1 2022-02-01	1372.3 2024-06-01	1200 2018-10-01
Highest raw rating	1613.3 2025-04-01	1596 2025-04-01	1359.2 2024-11-01	1200 2019-12-01
Highest weighted rating	1492.7 2026-01-01	1596 2023-07-01	1359.2 2025-05-05	1200 2018-10-01
Highest weighted performance	1619.5 2022-02-01	1628.1 2022-02-01	1372.3 2024-06-01	1200 2019-12-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	-3.4	-0.2
New rating	1499.1	1548.4	1319	1181.6
Analysis
Rating	1499.1	1548.4	1322.4	1181.8
Raw rating	1499.1	1548.4	1274.3	1180.6
Weighted rating	1492.7	1514.5	1322.4
Weighted performance	1488.7	1520.7	1155.1
K-factor	28	32	36	36
Floor	1113.3	1096	859.2	700
Max/Min rating change allowed	108.3	100.9	149.2	170.5
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	1499.1	1548.4	1274.3	1180.6
New weighted rating	1494.1	1519.3	1319	1181.6
New weighted performance	1478.9	1510.7	1147.2	0
Temp new rating	1499.1	1548.4	1319	1181.6
Temp new rating +/-	0	0	-3.4	-0.2
Final new rating +/-	0	0	-3.4	-0.2
New rating	1499.1	1548.4	1319	1181.6
New K-factor	28	32	36	36
New floor	1113.3	1096	859.2	700

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	81	39	22	20
	57	48	9	0
	46	34	12	0
	53	43	5	5
	0	0	0	0
History	237	164	48	25

Games since
	Main 138	Standard 87		Rapid 31		Blitz 20
Gender	Female
Age group	U14
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	1329		411		101
Female	177		62		15
U14	185		61		21
U14 Female	35		13		5
Standard
	RSA		Province		Region
Overall	919		256		53
Female	104		36		8
U14	120		40		14
U14 Female	20		9		2
Rapid
	RSA		Province		Region
Overall	912		465		38
Female	143		77		6
U14	203		108		10
U14 Female	46		23		3
Blitz
	RSA		Province		Region
Overall	535		194		82
Female	57		20		8
U14	55		18		9
U14 Female	12		5		3


	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	81	42.5	52.47	21	1402.8	1423.8
Standard	39	29.5	75.64	217.9	1329.9	1547.9
Rapid	22	9.5	43.18	-58	1404.1	1346.1
Blitz	20	3.5	17.5	-276.2	1543.7	1267.4
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	237	149	62.87	109.4	1332.4	1441.8
Standard	164	115.5	70.43	173.6	1302.8	1476.4
Rapid	48	28	58.33	70.8	1344.7	1415.5
Blitz	25	5.5	22	-238	1503.2	1265.2

Date	Main	Standard	Rapid	Blitz
2026-01-01	1499.1	1548.4	1274.3	1180.6
2025-11-30	1471.1	1539.7	1274.3	1180.6
2025-11-01	1477	1539.7	1284.8	1180.6
2025-09-30	1487.2	1539.7	1327.3	1180.6
2025-09-01	1487.2	1539.7	1327.3	1180.6
2025-08-01	1487.2	1539.7	1327.3	1180.6
2025-07-01	1485.9	1538.5	1326.9	1180
2025-06-01	1493.1	1538.5	1322.4	1177.8
2025-05-01	1533.8	1529.9	1359.2	1183.6
2025-04-01	1613.3	1596	1359.2	1183.6
2025-03-01	1570.7	1525.6	1359.2	1183.6
2025-02-01	1476	1455.6	1359.2	1183.6
2025-01-01	1476	1455.6	1359.2	1183.6
2024-12-01	1476	1455.6	1359.2	1183.6
2024-11-01	1476	1455.6	1359.2	1183.6
2024-10-01	1469.1	1455.6	1331.8	1183.6
2024-09-01	1469.1	1455.6	1331.8	1183.6
2024-11-01	1469.1	1455.6	1331.8	1183.6
2024-07-01	1427.1	1399.6	1331.8	1183.6
2024-06-01	1397.9	1399.6	1261.2	1183.6
2024-05-01	1505.2	1506.7	1261.2	1183.6
2024-04-01	1485.7	1470.7	1261.2	1183.6
2024-03-01	1415.6	1398.3	1261.2	1183.6
2024-02-01	1410.3	1385.5	1261.2	1183.6

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 Individual Championships (U14 Girls)	2025-12-17	2025-12-20	Standard	Nelson Mandela Bay (ENM)	6	6	3.5	Yes	Analysis
2	2025 Mzansi Inter Provincial Team Championships (U14 Girls)	2025-12-15	2025-12-17	Standard	Nelson Mandela Bay (ENM)	6	6	5	Yes	Analysis
3	Eden Chess Closed 2025 (Ladies)	2025-12-06	2025-12-07	Standard	Eden (WEG)	5	4	3	Yes	Analysis
4	Laerskool George Suid 2025 (Ope)	2025-10-25	2025-10-25	Rapid	Eden (WEG)	5	5	3	Yes	Analysis
5	HCPS Invitational Rapid Tournament 2025 (U13)	2025-10-18	2025-10-18	Rapid	Eden (WEG)	6	5	1.5	Yes	Analysis
6	Interclub Blitz 3 2025	2025-07-30	2025-07-30	Blitz	Eden (WEG)	6	6	2.5	Yes	Analysis
7	George Top Schools 2025 (U15)	2025-07-26	2025-07-26	Standard	Eden (WEG)	5	4	3.5	Yes	Analysis
8	Knysna Oyster Festival Rapid 2025 (Scholars)	2025-07-12	2025-07-12	Rapid	Eden (WEG)	6	6	3	Yes	Analysis
9	InterClub Blitz 3 2025	2025-06-12	2025-06-12	Blitz	Eden (WEG)	6	6	1	Yes	Analysis
10	Western Cape Schools Individual Championship 2025 (U13 Girls)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	4.5	Yes	Analysis
11	InterClub Blitz 2 2025	2025-05-08	2025-05-08	Blitz	Eden (WEG)	10	8	0	Yes	Analysis
12	Southern Knights Rapid 2025 (B)	2025-05-03	2025-05-03	Rapid	Eden (WEG)	7	6	2	Yes	Analysis
13	Eden Chess Trials 2 2025 (U14)	2025-03-15	2025-04-12	Standard	Eden (WEG)	10	5	4	Yes	Analysis
14	South African Junior Closed Chess Championships 2025 (U12 Girls)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	4	Yes	Analysis
15	Eden Schools Chess Trials 1 2025 (U13 Girls)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	5	Yes	Analysis
16	George Schools Chess Trials 2 2025 (U13 Girls)	2025-02-15	2025-02-15	Standard	Eden (WEG)	5	5	4	Yes	Analysis
17	George Schools Chess Trials 1 2025 (U13 Girls)	2025-02-01	2025-02-01	Standard	Eden (WEG)	5	5	4.5	Yes	Analysis
18	George Suid Senior Skaaktoernooi 2024	2024-10-26	2024-10-26	Rapid	Eden (WEG)	5	5	4	Yes	Analysis
19	George Primary Top Schools 2024 (U11)	2024-07-20	2024-07-20	Standard	Eden (WEG)	5	4	3	Yes	Analysis
20	Western Cape - Kings and Queens 2024 (Girls)	2024-06-08	2024-06-08	Rapid	Overberg (WOS)	5	4	3.5	Yes	Analysis
21	South African Junior Closed Chess Championship 2024 (U12 Girls)	2024-04-27	2024-05-01	Standard	Ekurhuleni (GE)	9	8	2.5	Yes	Analysis
22	Western Cape PS Individuals Championship 2024 (U11 Girls)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	2	Yes	Analysis
23	Eden Chess Trials 2 2024 (U12)	2024-04-13	2024-04-20	Standard	Eden (WEG)	10	10	7	Yes	Analysis
24	Eden School Chess Trials 1 2024 (U11 Girls)	2024-03-09	2024-03-09	Standard	Eden (WEG)	5	5	4	Yes	Analysis
25	George Schools Trials 3 2024 (U11 Girls)	2024-03-02	2024-03-02	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
26	George Schools Trials 2 2024 (U11 Girls)	2024-02-17	2024-02-17	Standard	Eden (WEG)	5	5	3	Yes	Analysis
27	George Schools Trials 1 2024 (U11 Girls)	2024-02-03	2024-02-03	Standard	Eden (WEG)	5	5	4	Yes	Analysis
28	Pacaltsdorp Chess Club Open 2023 (Development)	2023-08-26	2023-08-26	Rapid	Eden (WEG)	6	6	5	Yes	Analysis
29	Top Schools 2023 (U13)	2023-07-29	2023-07-29	Standard	Eden (WEG)	5	4	1	Yes	Analysis
30	Knysna Oyster Festival 2023 (Juniors)	2023-07-01	2023-07-01	Rapid	Eden (WEG)	6	6	3.5	Yes	Analysis
31	Western Cape PS Individuals 2023 (U11 Girls)	2023-05-05	2023-05-06	Standard	Cape Town (WCT)	6	6	5	Yes	Analysis
32	Eden Trials 2+3 2023 (U12)	2023-04-15	2023-05-13	Standard	Eden (WEG)	10	9	4	Yes	Analysis
33	Eden Trails 1 2023 (U11 Girls)	2023-03-11	2023-03-11	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
34	George Chess Trials 2 2023 (U11 Girls)	2023-02-11	2023-02-11	Standard	Cape Town (WCT)	5	5	4	Yes	Analysis
35	George Chess Trials 1 2023 (U11 Girls)	2023-01-28	2023-01-28	Standard	Eden (WEG)	5	5	4.5	Yes	Analysis
36	George Open 2022 (C)	2022-12-03	2022-12-03	Standard	Eden (WEG)	5	5	2	Yes	Analysis
37	Mossel Bay Open 2022 (C)	2022-10-01	2022-10-01	Rapid	Eden (WEG)	5	5	2.5	Yes	Analysis
38	WCCA Rural Cup 2022 (U10)	2022-08-13	2022-08-14	Standard	Overberg (WOS)	5	3	3	Yes	Analysis
39	WCCA Rural Cup Blitz 2022	2022-07-12	2022-07-12	Blitz	Overberg (WOS)	5	5	2	Yes	Analysis
40	George Topskole 2022 (O9)	2022-07-30	2022-07-30	Standard	Eden (WEG)	5	4	3	Yes	Analysis
41	George Open 2022 (C)	2022-06-11	2022-06-11	Standard	Eden (WEG)	5	5	3	Yes	Analysis
42	Western Cape Schools 2022 (U9 Girls)	2022-05-28	2022-05-29	Standard	Cape Winelands (WCW)	6	6	5	Yes	Analysis
43	Eden Proewe 2 2022 (O9 Dogters)	2022-04-09	2022-04-09	Standard	Eden (WEG)	5	5	4	Yes	Analysis
44	Eden Proewe 1 2022 (O9 Dogters)	2022-03-12	2022-03-12	Standard	Eden (WEG)	5	5	5	Yes	Analysis
45	George Trials 2 2022 (U9)	2022-02-12	2022-02-12	Standard	Eden (WEG)	5	5	5	Yes	Analysis
46	George Trials 1 2022 (U9)	2022-01-29	2022-01-29	Standard	Eden (WEG)	5	5	5	Yes	Analysis

#	Games	Start				End
1	17	Tournament George Trials 1 2022				Tournament Eden Proewe 2 2022
		date 2022-01-29	rnd 1	type Standard	result 1	date 2022-04-09	rnd 2	type Standard	result 1
		Opponent Polden, I (Isabelle)				Opponent Jansen, E (Elgezay)
2	12	Tournament George Suid Senior Skaaktoernooi 2024				Tournament George Schools Chess Trials 2 2025
		date 2024-10-26	rnd 2	type Rapid	result 1	date 2025-02-15	rnd 3	type Standard	result 1
		Opponent Kotze, A (Ayden)				Opponent Barkhuysen, A (Ankia)
3	8	Tournament George Schools Chess Trials 2 2025				Tournament Eden Chess Trials 2 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Bruiners, C (Chandre)				Opponent Bruiners, C (Chandre)

#	Games	Start				End
1	17	Tournament George Trials 1 2022				Tournament Eden Proewe 2 2022
		date 2022-01-29	rnd 1	type Standard	result 1	date 2022-04-09	rnd 2	type Standard	result 1
		Opponent Polden, I (Isabelle)				Opponent Jansen, E (Elgezay)
2	9	Tournament George Primary Top Schools 2024				Tournament George Schools Chess Trials 2 2025
		date 2024-07-20	rnd 5	type Standard	result 1	date 2025-02-15	rnd 3	type Standard	result 1
		Opponent Van Staden, P (Pearson)				Opponent Barkhuysen, A (Ankia)
3	8	Tournament Western Cape Schools Individual Championship 2025				Tournament George Top Schools 2025
		date 2025-05-17	rnd 3	type Standard	result 1	date 2025-07-26	rnd 5	type Standard	result 1
		Opponent Mtintsilana, A (Athabile)				Opponent Petersen, S (Shenwin)

#	Games	Start				End
1	7	Tournament Pacaltsdorp Chess Club Open 2023				Tournament Western Cape - Kings and Queens 2024
		date 2023-08-26	rnd 4	type Rapid	result 1	date 2024-06-08	rnd 4	type Rapid	result 1
		Opponent Molose, A (Achuma)				Opponent Van Der Westhuizen, L (Linli)
2	6	Tournament Mossel Bay Open 2022				Tournament Knysna Oyster Festival 2023
		date 2022-10-01	rnd 5	type Rapid	result 0.5	date 2023-07-01	rnd 5	type Rapid	result 0.5
		Opponent Vanqa, A (Ahlomle)				Opponent Windvogel, N (Nayron)
3	5	Tournament George Suid Senior Skaaktoernooi 2024				Tournament Southern Knights Rapid 2025
		date 2024-10-26	rnd 2	type Rapid	result 1	date 2025-05-03	rnd 1	type Rapid	result 1
		Opponent Kotze, A (Ayden)				Opponent Magomarele, R (Rachel)

#	Games	Start				End
1	2	Tournament Interclub Blitz 3 2025				Tournament Interclub Blitz 3 2025
		date 2025-07-30	rnd 5	type Blitz	result 1	date 2025-07-30	rnd 6	type Blitz	result 1
		Opponent Oktober, J (Jayson)				Opponent Oktober, J (Jayson)
2	1	Tournament Interclub Blitz 3 2025				Tournament Interclub Blitz 3 2025
		date 2025-07-30	rnd 3	type Blitz	result 0.5	date 2025-07-30	rnd 3	type Blitz	result 0.5
		Opponent Roelf, W (Wildren)				Opponent Roelf, W (Wildren)
3	1	Tournament InterClub Blitz 3 2025				Tournament InterClub Blitz 3 2025
		date 2025-06-12	rnd 5	type Blitz	result 1	date 2025-06-12	rnd 5	type Blitz	result 1
		Opponent Marner, B (Bryan Neil)				Opponent Marner, B (Bryan Neil)

#	Games	Start				End
1	17	Tournament George Trials 1 2022				Tournament Eden Proewe 2 2022
		date 2022-01-29	rnd 1	type Standard	result 1	date 2022-04-09	rnd 2	type Standard	result 1
		Opponent Polden, I (Isabelle)				Opponent Jansen, E (Elgezay)
2	8	Tournament George Schools Chess Trials 2 2025				Tournament Eden Chess Trials 2 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Bruiners, C (Chandre)				Opponent Bruiners, C (Chandre)
3	8	Tournament George Suid Senior Skaaktoernooi 2024				Tournament George Schools Chess Trials 1 2025
		date 2024-10-26	rnd 2	type Rapid	result 1	date 2025-02-01	rnd 4	type Standard	result 1
		Opponent Kotze, A (Ayden)				Opponent Cornforth, K (Kayleigh)

#	Games	Start				End
1	17	Tournament George Trials 1 2022				Tournament Eden Proewe 2 2022
		date 2022-01-29	rnd 1	type Standard	result 1	date 2022-04-09	rnd 2	type Standard	result 1
		Opponent Polden, I (Isabelle)				Opponent Jansen, E (Elgezay)
2	8	Tournament George Schools Chess Trials 2 2025				Tournament Eden Chess Trials 2 2025
		date 2025-02-15	rnd 5	type Standard	result 1	date 2025-03-15	rnd 2	type Standard	result 1
		Opponent Bruiners, C (Chandre)				Opponent Bruiners, C (Chandre)
3	5	Tournament George Primary Top Schools 2024				Tournament George Schools Chess Trials 1 2025
		date 2024-07-20	rnd 5	type Standard	result 1	date 2025-02-01	rnd 4	type Standard	result 1
		Opponent Van Staden, P (Pearson)				Opponent Cornforth, K (Kayleigh)

#	Games	Start				End
1	5	Tournament George Suid Senior Skaaktoernooi 2024				Tournament Southern Knights Rapid 2025
		date 2024-10-26	rnd 2	type Rapid	result 1	date 2025-05-03	rnd 1	type Rapid	result 1
		Opponent Kotze, A (Ayden)				Opponent Magomarele, R (Rachel)
2	4	Tournament Pacaltsdorp Chess Club Open 2023				Tournament Western Cape - Kings and Queens 2024
		date 2023-08-26	rnd 4	type Rapid	result 1	date 2024-06-08	rnd 1	type Rapid	result 1
		Opponent Molose, A (Achuma)				Opponent Du Preez, A (Anneke)
3	2	Tournament Knysna Oyster Festival Rapid 2025				Tournament Knysna Oyster Festival Rapid 2025
		date 2025-07-12	rnd 2	type Rapid	result 1	date 2025-07-12	rnd 3	type Rapid	result 1
		Opponent Jacobs, E (Eugeniel)				Opponent Plaatjies, A (Ayren)

#	Games	Start				End
1	2	Tournament Interclub Blitz 3 2025				Tournament Interclub Blitz 3 2025
		date 2025-07-30	rnd 5	type Blitz	result 1	date 2025-07-30	rnd 6	type Blitz	result 1
		Opponent Oktober, J (Jayson)				Opponent Oktober, J (Jayson)
2	1	Tournament InterClub Blitz 3 2025				Tournament InterClub Blitz 3 2025
		date 2025-06-12	rnd 5	type Blitz	result 1	date 2025-06-12	rnd 5	type Blitz	result 1
		Opponent Marner, B (Bryan Neil)				Opponent Marner, B (Bryan Neil)
3	1	Tournament WCCA Rural Cup Blitz 2022				Tournament WCCA Rural Cup Blitz 2022
		date 2022-07-12	rnd 4	type Blitz	result 1	date 2022-07-12	rnd 4	type Blitz	result 1
		Opponent Stalmeester, J (Jaiden)				Opponent Stalmeester, J (Jaiden)

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	Blignaut ,DC (Dane)	8	4.5	53.1	8	4.5	53.1	0	0	0	0	0	0
1	Blignaut ,DC (Dane)	8	1452.7	1505.9	8	1468.6	1505.9	0	0	0	0	0	0
2	Zaaiman ,J (Jana)	7	6	303.6	7	6	303.6	0	0	0	0	0	0
2	Zaaiman ,J (Jana)	7	1274.9	1578.4	7	1272.9	1578.4	0	0	0	0	0	0
3	Le Roux ,M (Melandi)	7	6	303.6	7	6	303.6	0	0	0	0	0	0
3	Le Roux ,M (Melandi)	7	1268.4	1571.9	7	1272.3	1571.9	0	0	0	0	0	0
4	Cornforth ,K (Kayleigh)	7	1.5	-242.9	4	1.5	-106.2	3	0	-425	0	0	0
4	Cornforth ,K (Kayleigh)	7	1581.8	1338.9	4	1568.2	1475.5	3	1275.5	1156.8	0	0	0
5	Bruiners ,C (Chandre)	6	5	283.3	6	5	283.3	0	0	0	0	0	0
5	Bruiners ,C (Chandre)	6	1267.4	1550.7	6	1253	1550.7	0	0	0	0	0	0
6	Pringle ,K (Kirsten)	5	4	255	5	4	255	0	0	0	0	0	0
6	Pringle ,K (Kirsten)	5	1334.2	1589.2	5	1340	1589.2	0	0	0	0	0	0
7	Barkhuysen ,A (Ankia)	4	4	425	4	4	425	0	0	0	0	0	0
7	Barkhuysen ,A (Ankia)	4	1217.9	1642.9	4	1208.6	1642.9	0	0	0	0	0	0
8	Cathi ,B (Beunielle)	4	4	425	4	4	425	0	0	0	0	0	0
8	Cathi ,B (Beunielle)	4	1207.8	1632.8	4	1209.4	1632.8	0	0	0	0	0	0
9	Greeff ,M (Mari)	4	2	0	3	1	-141.7	1	1	425	0	0	0
9	Greeff ,M (Mari)	4	1472.1	1472.1	3	1465.7	1330.4	1	1200	1897.1	0	0	0
10	Simon ,R (Riley)	4	0	-425	2	0	-425	0	0	0	2	0	-425
10	Simon ,R (Riley)	4	1691.6	1266.6	2	1687.8	1266.6	0	0	0	2	1333.4	1266.6

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Brewis, S (Sienna)

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