Chess South Africa Ratings Database

PLAYER PAGE

Personal

Rostoll, A (Arno)

Chess SA id

1170192944

FIDE id

Date of birth

2017-09-17 (U10)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-10-18

Personal details last changed

2025-02-12

Junior GPX Games

53.2

Junior GPX Points

1308.6

Item	Main	Standard	Rapid	Blitz
Rating	1417.4	1439.1	1220.3	1200
Raw rating	1417.4	1439.1	1210.5	1200
Weighted rating	1399.4	1399.7	1220.3	1200
Weighted performance	1299.5	1354.8	0	0
Floor	994.2	996.8	755.5	700
K-factor	32	32	36	36
Min/Max rating change allowed	121.6	117.9	163.4	165.8
Highest rating	1494.2 2025-04-01	1496.8 2025-04-01	1255.5 2025-06-01	1200 2024-02-01
Highest raw rating	1494.2 2025-04-01	1496.8 2025-04-01	1255.5 2025-06-01	1200 2024-02-01
Highest weighted rating	1494.2 2024-10-01	1496.8 2024-10-01	1220.3 2025-11-01	1200 2024-02-01
Highest weighted performance	1494.2 2025-04-01	1496.8 2024-02-01	1200 2024-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	-0.1	0
New rating	1417.4	1439.1	1220.1	1200
Analysis
Rating	1417.4	1439.1	1220.3	1200
Raw rating	1417.4	1439.1	1210.5	1200
Weighted rating	1399.4	1399.7	1220.3
Weighted performance	1299.5	1354.8	0
K-factor	32	32	36	36
Floor	994.2	996.8	755.5	700
Max/Min rating change allowed	121.6	117.9	163.4	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	1417.4	1439.1	1210.5	1200
New weighted rating	1403.8	1405.8	1220.1	1200
New weighted performance	1291.7	1346.4	0	0
Temp new rating	1417.4	1439.1	1220.1	1200
Temp new rating +/-	0	0	-0.1	0
Final new rating +/-	0	0	-0.1	0
New rating	1417.4	1439.1	1220.1	1200
New K-factor	32	32	36	36
New floor	994.2	996.8	755.5	700

Item	Main	Standard	Rapid
	0	0	0
	55	44	11
	53	53	0
	0	0	0
	0	0	0
	0	0	0
History	108	97	11

Games since
	Main 108	Standard 97		Rapid 11		Blitz 0
Gender	Male
Age group	U10
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	1999		617		157
Male	1648		497		126
U10	123		30		12
U10 Male	107		24		8
Standard
	RSA		Province		Region
Overall	1693		461		125
Male	1401		370		99
U10	105		26		12
U10 Male	91		20		8
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 Male	-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	55	36	65.45	131.4	1320.6	1452
Standard	44	30	68.18	154.5	1318.5	1473
Rapid	11	6	54.55	38.6	1329.2	1367.9
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	108	70	64.81	125.9	1274.4	1400.3
Standard	97	64	65.98	135.8	1268.2	1404
Rapid	11	6	54.55	38.6	1329.2	1367.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1417.4	1439.1	1210.5	1200
2025-09-30	1440.4	1439.1	1255.5	1200
2025-09-01	1440.4	1439.1	1255.5	1200
2025-08-01	1440.4	1439.1	1255.5	1200
2025-07-01	1440.8	1437.5	1255.5	1200
2025-06-01	1440.8	1437.5	1255.5	1200
2025-05-01	1433.6	1437.5	1200	1200
2025-04-01	1494.2	1496.8	1200	1200
2025-03-01	1448.3	1452.4	1200	1200
2025-02-01	1329.5	1322.4	1200	1200
2025-01-01	1329.5	1322.4	1200	1200
2024-12-01	1329.5	1322.4	1200	1200
2024-11-01	1329.5	1322.4	1200	1200
2024-10-01	1383.9	1389.7	1200	1200
2024-09-01	1360.3	1358.4	1200	1200
2024-08-01	1360.3	1358.4	1200	1200
2024-07-01	1317.6	1304	1200	1200
2024-09-01	1339.7	1329.2	1200	1200
2024-05-01	1383.9	1382.5	1200	1200
2024-04-01	1344.6	1365	1200	1200
2024-03-01	1286.3	1302	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	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	HCPS Invitational Rapid Tournament 2025 (U9)	2025-10-18	2025-10-18	Rapid	Eden (WEG)	6	6	2	Yes	Analysis
2	George Top Schools 2025 (U9)	2025-07-26	2025-07-26	Standard	Eden (WEG)	5	5	3	Yes	Analysis
3	Dennie Chess Rapid Tournament Open 2025 (U9)	2025-05-24	2025-05-24	Rapid	Eden (WEG)	5	5	4	Yes	Analysis
4	Eden Chess Trials 2 2025 (U10)	2025-03-15	2025-04-12	Standard	Eden (WEG)	10	10	6	Yes	Analysis
5	South African Junior Closed Chess Championships 2025 (U8 Open)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	4	Yes	Analysis
6	Eden Schools Chess Trials 1 2025 (U9 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	4	Yes	Analysis
7	George Schools Chess Trials 3 2025 (U9 Boys)	2025-03-01	2025-03-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis
8	George Schools Chess Trials 2 2025 (U9 Boys)	2025-02-15	2025-02-15	Standard	Eden (WEG)	5	5	5	Yes	Analysis
9	George Schools Chess Trials 1 2025 (U9 Boys)	2025-02-01	2025-02-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	HCPS Invitational Rapid Tournament 2025 (U9)	2025-10-18	2025-10-18	Rapid	Eden (WEG)	6	6	2	Yes	Analysis
2	George Top Schools 2025 (U9)	2025-07-26	2025-07-26	Standard	Eden (WEG)	5	5	3	Yes	Analysis
3	Dennie Chess Rapid Tournament Open 2025 (U9)	2025-05-24	2025-05-24	Rapid	Eden (WEG)	5	5	4	Yes	Analysis
4	Eden Chess Trials 2 2025 (U10)	2025-03-15	2025-04-12	Standard	Eden (WEG)	10	10	6	Yes	Analysis
5	South African Junior Closed Chess Championships 2025 (U8 Open)	2025-03-31	2025-04-05	Standard	Cape Winelands (WCW)	9	9	4	Yes	Analysis
6	Eden Schools Chess Trials 1 2025 (U9 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	4	Yes	Analysis
7	George Schools Chess Trials 3 2025 (U9 Boys)	2025-03-01	2025-03-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis
8	George Schools Chess Trials 2 2025 (U9 Boys)	2025-02-15	2025-02-15	Standard	Eden (WEG)	5	5	5	Yes	Analysis
9	George Schools Chess Trials 1 2025 (U9 Boys)	2025-02-01	2025-02-01	Standard	Eden (WEG)	5	5	4	Yes	Analysis
10	Eden Chess Union League 2024 (1st Division)	2024-10-12	2024-10-12	Standard	Eden (WEG)	5	5	1	Yes	Analysis
11	Western Cape Top Schools Championship 2024 (U7 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	5	4	3.5	Yes	Analysis
12	George Primary Top Schools 2024 (U7)	2024-07-20	2024-07-20	Standard	Eden (WEG)	5	4	4	Yes	Analysis
13	Eden Open 2024 (D)	2024-06-22	2024-06-22	Standard	Eden (WEG)	5	4	1	Yes	Analysis
14	Western Cape PS Individuals Championship 2024 (U7 Boys)	2024-05-04	2024-05-05	Standard	West Coast (WCU)	6	6	2.5	Yes	Analysis
15	Eden Chess Trials 2 2024 (U8)	2024-04-13	2024-04-20	Standard	Eden (WEG)	10	10	6	Yes	Analysis
16	Eden School Chess Trials 1 2024 (U7 Boys)	2024-03-09	2024-03-09	Standard	Eden (WEG)	5	5	4	Yes	Analysis
17	George Schools Trials 3 2024 (U7 Boys)	2024-03-02	2024-03-02	Standard	Eden (WEG)	5	5	4	Yes	Analysis
18	George Schools Trials 2 2024 (U7 Boys)	2024-02-17	2024-02-17	Standard	Eden (WEG)	5	5	5	Yes	Analysis
19	George Schools Trials 1 2024 (U7 Boys)	2024-02-03	2024-02-03	Standard	Eden (WEG)	5	5	3	Yes	Analysis

#	Games	Start				End
1	9	Tournament George Schools Chess Trials 1 2025				Tournament George Schools Chess Trials 3 2025
		date 2025-02-01	rnd 5	type Standard	result 1	date 2025-03-01	rnd 3	type Standard	result 1
		Opponent Basson, M (Malik)				Opponent Seaward, C (Cameron)
2	8	Tournament George Primary Top Schools 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-07-20	rnd 2	type Standard	result 1	date 2024-09-01	rnd 5	type Standard	result 0.5
		Opponent Lawa, V (Veretariki)				Opponent Lourens, L (Lihan)
3	6	Tournament George Schools Trials 3 2024				Tournament Eden School Chess Trials 1 2024
		date 2024-03-02	rnd 3	type Standard	result 1	date 2024-03-09	rnd 3	type Standard	result 1
		Opponent Rens, D (Deauwin)				Opponent Vermeulen, E (Elster)

#	Games	Start				End
1	9	Tournament George Schools Chess Trials 1 2025				Tournament George Schools Chess Trials 3 2025
		date 2025-02-01	rnd 5	type Standard	result 1	date 2025-03-01	rnd 3	type Standard	result 1
		Opponent Basson, M (Malik)				Opponent Seaward, C (Cameron)
2	8	Tournament George Primary Top Schools 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-07-20	rnd 2	type Standard	result 1	date 2024-09-01	rnd 5	type Standard	result 0.5
		Opponent Lawa, V (Veretariki)				Opponent Lourens, L (Lihan)
3	6	Tournament George Schools Trials 3 2024				Tournament Eden School Chess Trials 1 2024
		date 2024-03-02	rnd 3	type Standard	result 1	date 2024-03-09	rnd 3	type Standard	result 1
		Opponent Rens, D (Deauwin)				Opponent Vermeulen, E (Elster)

#	Games	Start				End
1	3	Tournament Dennie Chess Rapid Tournament Open 2025				Tournament Dennie Chess Rapid Tournament Open 2025
		date 2025-05-24	rnd 1	type Rapid	result 1	date 2025-05-24	rnd 3	type Rapid	result 1
		Opponent Bester, R (Renz)				Opponent Cornforth, J (Joshua)
2	1	Tournament Dennie Chess Rapid Tournament Open 2025				Tournament Dennie Chess Rapid Tournament Open 2025
		date 2025-05-24	rnd 5	type Rapid	result 1	date 2025-05-24	rnd 5	type Rapid	result 1
		Opponent Janse van Rensburg, O (Oliver)				Opponent Janse van Rensburg, O (Oliver)

No games found.

#	Games	Start				End

#	Games	Start				End
1	9	Tournament George Schools Chess Trials 1 2025				Tournament George Schools Chess Trials 3 2025
		date 2025-02-01	rnd 5	type Standard	result 1	date 2025-03-01	rnd 3	type Standard	result 1
		Opponent Basson, M (Malik)				Opponent Seaward, C (Cameron)
2	7	Tournament George Primary Top Schools 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-07-20	rnd 2	type Standard	result 1	date 2024-08-30	rnd 4	type Standard	result 1
		Opponent Lawa, V (Veretariki)				Opponent Ellis, A (Alexander)
3	6	Tournament George Schools Trials 3 2024				Tournament Eden School Chess Trials 1 2024
		date 2024-03-02	rnd 3	type Standard	result 1	date 2024-03-09	rnd 3	type Standard	result 1
		Opponent Rens, D (Deauwin)				Opponent Vermeulen, E (Elster)

#	Games	Start				End
1	9	Tournament George Schools Chess Trials 1 2025				Tournament George Schools Chess Trials 3 2025
		date 2025-02-01	rnd 5	type Standard	result 1	date 2025-03-01	rnd 3	type Standard	result 1
		Opponent Basson, M (Malik)				Opponent Seaward, C (Cameron)
2	7	Tournament George Primary Top Schools 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-07-20	rnd 2	type Standard	result 1	date 2024-08-30	rnd 4	type Standard	result 1
		Opponent Lawa, V (Veretariki)				Opponent Ellis, A (Alexander)
3	6	Tournament George Schools Trials 3 2024				Tournament Eden School Chess Trials 1 2024
		date 2024-03-02	rnd 3	type Standard	result 1	date 2024-03-09	rnd 3	type Standard	result 1
		Opponent Rens, D (Deauwin)				Opponent Vermeulen, E (Elster)

#	Games	Start				End
1	3	Tournament Dennie Chess Rapid Tournament Open 2025				Tournament Dennie Chess Rapid Tournament Open 2025
		date 2025-05-24	rnd 1	type Rapid	result 1	date 2025-05-24	rnd 3	type Rapid	result 1
		Opponent Bester, R (Renz)				Opponent Cornforth, J (Joshua)
2	1	Tournament Dennie Chess Rapid Tournament Open 2025				Tournament Dennie Chess Rapid Tournament Open 2025
		date 2025-05-24	rnd 5	type Rapid	result 1	date 2025-05-24	rnd 5	type Rapid	result 1
		Opponent Janse van Rensburg, O (Oliver)				Opponent Janse van Rensburg, O (Oliver)

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	Vermeulen ,E (Elster)	8	4	0	8	4	0	0	0	0	0	0	0
1	Vermeulen ,E (Elster)	8	1309.6	1309.6	8	1314.2	1309.6	0	0	0	0	0	0
2	Van Der Merwe ,F (Finley)	6	2	-141.7	6	2	-141.7	0	0	0	0	0	0
2	Van Der Merwe ,F (Finley)	6	1223.1	1081.5	6	1213.4	1081.5	0	0	0	0	0	0
3	Rens ,B (Beauwin)	5	2	-85	5	2	-85	0	0	0	0	0	0
3	Rens ,B (Beauwin)	5	1342.9	1257.9	5	1358.5	1257.9	0	0	0	0	0	0
4	Rens ,D (Deauwin)	4	2	0	4	2	0	0	0	0	0	0	0
4	Rens ,D (Deauwin)	4	1272.5	1272.5	4	1277.6	1272.5	0	0	0	0	0	0
5	Cornforth ,J (Joshua)	4	3	212.5	3	2	141.7	1	1	425	0	0	0
5	Cornforth ,J (Joshua)	4	1193.2	1405.7	3	1179.7	1334.8	1	1200	1618.2	0	0	0
6	Lawa ,V (Veretariki)	4	3	212.5	2	2	425	2	1	0	0	0	0
6	Lawa ,V (Veretariki)	4	1285.7	1498.2	2	1202	1710.7	2	1208.2	1285.7	0	0	0
7	Van Den Berg ,T (Teagan)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
7	Van Den Berg ,T (Teagan)	3	1409.1	1550.8	3	1420.1	1550.8	0	0	0	0	0	0
8	Bruiners ,J (Jeanne)	3	3	425	3	3	425	0	0	0	0	0	0
8	Bruiners ,J (Jeanne)	3	1224.6	1649.6	3	1224.5	1649.6	0	0	0	0	0	0
9	Lourens ,L (Lihan)	3	0.5	-283.3	3	0.5	-283.3	0	0	0	0	0	0
9	Lourens ,L (Lihan)	3	1336.7	1053.4	3	1311.1	1053.4	0	0	0	0	0	0
10	Petersen ,B (Bryson)	3	0	-425	3	0	-425	0	0	0	0	0	0
10	Petersen ,B (Bryson)	3	1449.6	1024.6	3	1485.1	1024.6	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Rostoll, A (Arno)

Ratings

Game statistics

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms