Chess South Africa Ratings Database

PLAYER PAGE

Personal

Claassen, M (Mervin)

Chess SA id

1100130762

FIDE id

Date of birth

2010-04-14 (U16)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-07

Personal details last changed

1900-01-01

Junior GPX Games

48.2

Junior GPX Points

1353.8

Item	Main	Standard	Rapid	Blitz
Rating	1539.7	1554	1340.7	1281
Raw rating	1509.4	1482.6	1340.7	1281
Weighted rating	1539.7	1554	1265.1	1241.4
Weighted performance	1409.6	1337.7	0	1070.3
Floor	1068.1	1086.3	840.7	781
K-factor	32	32	36	36
Min/Max rating change allowed	106.7	110.9	135.7	147.7
Highest rating	1568.1 2025-09-01	1586.3 2025-03-01	1340.7 2025-08-01	1281 2024-12-01
Highest raw rating	1568.1 2025-09-01	1586.3 2025-03-01	1340.7 2025-08-01	1281 2024-12-01
Highest weighted rating	1564 2025-04-01	1586.3 2025-04-01	1248.9 2025-08-01	1281 2018-10-01
Highest weighted performance	1529.2 2025-04-01	1542.2 2024-11-01	0 2025-01-01	1294.3 2025-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-1.5	-5.1	0	0
New rating	1538.2	1548.9	1340.7	1281
Analysis
Rating	1539.7	1554	1340.7	1281
Raw rating	1509.4	1482.6	1340.7	1281
Weighted rating	1539.7	1554	1265.1
Weighted performance	1409.6	1337.7	0
K-factor	32	32	36	36
Floor	1068.1	1086.3	840.7	781
Max/Min rating change allowed	106.7	110.9	135.7	147.7
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	1509.4	1482.6	1340.7	1281
New weighted rating	1538.2	1548.9	1272.7	1247.7
New weighted performance	1409.1	1337.3	0	1069.9
Temp new rating	1538.2	1548.9	1340.7	1281
Temp new rating +/-	-1.5	-5.1	0	0
Final new rating +/-	-1.5	-5.1	0	0
New rating	1538.2	1548.9	1340.7	1281
New K-factor	32	32	36	36
New floor	1068.1	1086.3	840.7	781

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	48	36	12	0
	56	37	4	15
	56	42	0	14
	49	32	5	12
	0	0	0	0
History	224	162	21	41

Games since
	Main 104	Standard 73		Rapid 16		Blitz 15
Gender	Male
Age group	U16
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	973		284		61
Male	855		241		54
U16	119		35		7
U16 Male	99		30		6
Standard
	RSA		Province		Region
Overall	821		216		44
Male	721		182		38
U16	101		25		5
U16 Male	83		20		4
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	313		126		49
Male	298		122		48
U16	25		9		4
U16 Male	23		9		4


	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	48	32.5	67.71	150.5	1365	1515.5
Standard	36	24	66.67	141.7	1338	1479.7
Rapid	12	8.5	70.83	177.1	1446	1623
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	224	146	65.18	129	1346.4	1475.5
Standard	162	110	67.9	152.2	1336.8	1488.9
Rapid	21	13	61.9	101.2	1455.1	1556.3
Blitz	41	23	56.1	51.8	1329.1	1380.9

Date	Main	Standard	Rapid	Blitz
2025-09-30	1509.4	1482.6	1340.7	1281
2025-09-01	1568.1	1558.7	1340.7	1281
2025-08-01	1566.5	1558	1340.7	1281
2025-07-01	1533.6	1556.7	1261.3	1281
2025-06-01	1532.2	1555.1	1261.3	1281
2025-05-01	1529.5	1550.3	1261.3	1281
2025-04-01	1554.8	1583.1	1261.3	1281
2025-03-01	1553.9	1586.3	1261.3	1281
2025-02-01	1548.5	1571.6	1234.9	1281
2025-01-01	1548.5	1571.6	1234.9	1281
2024-12-01	1548.5	1571.6	1234.9	1281
2024-11-01	1554	1571.6	1234.9	1243.6
2024-10-01	1539.9	1555.9	1234.9	1243.6
2024-09-01	1511.8	1532.2	1234.9	1115.1
2024-08-01	1547.9	1581.2	1234.9	1115.1
2024-07-01	1547.9	1581.2	1234.9	1115.1
2024-06-01	1564	1581.2	1214.4	1115.1
2024-08-01	1564	1581.2	1214.4	1115.1
2024-04-01	1472.9	1472.1	1214.4	1115.1
2024-03-01	1476.6	1501.5	1214.4	1115.1
2024-02-01	1476.6	1501.5	1214.4	1115.1
2024-01-01	1476.6	1501.5	1214.4	1115.1
2023-12-01	1476.6	1501.5	1214.4	1115.1
2023-11-01	1476.6	1501.5	1214.4	1115.1

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	Western Cape Schools - Top Schools 2025 (U19)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	1.5	Yes	Analysis
2	Mossel Bay Top Schools 2025 (U18 Open)	2025-08-02	2025-08-02	Standard	Eden (WEG)	5	5	4.5	Yes	Analysis
3	Knysna Oyster Festival Rapid 2025 (Scholars)	2025-07-12	2025-07-12	Rapid	Eden (WEG)	6	6	5	Yes	Analysis
4	Western Cape Schools Individual Championship 2025 (U15 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	3.5	Yes	Analysis
5	Eden Chess Trials 2 2025 (U16)	2025-03-15	2025-04-12	Standard	Eden (WEG)	10	10	6	Yes	Analysis
6	Eden Schools Chess Trials 1 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
7	Mossel Bay Schools Trials 2 2025 (U15 Boys)	2025-02-22	2025-02-22	Standard	Eden (WEG)	5	5	5	Yes	Analysis
8	Eden Rapid 2025 (A)	2025-02-23	2025-02-23	Rapid	Eden (WEG)	6	6	3.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Western Cape Schools - Top Schools 2025 (U19)	2025-09-06	2025-09-07	Standard	Overberg (WOS)	6	5	1.5	Yes	Analysis
2	Mossel Bay Top Schools 2025 (U18 Open)	2025-08-02	2025-08-02	Standard	Eden (WEG)	5	5	4.5	Yes	Analysis
3	Knysna Oyster Festival Rapid 2025 (Scholars)	2025-07-12	2025-07-12	Rapid	Eden (WEG)	6	6	5	Yes	Analysis
4	Western Cape Schools Individual Championship 2025 (U15 Boys)	2025-04-26	2025-04-27	Standard	West Coast (WCU)	6	6	3.5	Yes	Analysis
5	Eden Chess Trials 2 2025 (U16)	2025-03-15	2025-04-12	Standard	Eden (WEG)	10	10	6	Yes	Analysis
6	Eden Schools Chess Trials 1 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
7	Mossel Bay Schools Trials 2 2025 (U15 Boys)	2025-02-22	2025-02-22	Standard	Eden (WEG)	5	5	5	Yes	Analysis
8	Eden Rapid 2025 (A)	2025-02-23	2025-02-23	Rapid	Eden (WEG)	6	6	3.5	Yes	Analysis
9	Eden Gambit Chess Tournament 2024 (Blitz)	2024-11-01	2024-11-01	Blitz	Eden (WEG)	7	7	3.5	Yes	Analysis
10	Eden Chess Union League 2024 (1st Division)	2024-10-12	2024-10-12	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
11	Western Cape Top Schools Championship 2024 (U18 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	6	6	4.5	Yes	Analysis
12	InterClub Blitz 4 2024	2024-09-04	2024-09-04	Blitz	Eden (WEG)	10	8	7	Yes	Analysis
13	Eden Top Schools 2024 (U18 Open)	2024-08-17	2024-08-17	Standard	Eden (WEG)	5	5	2	Yes	Analysis
14	Western Cape - Kings and Queens 2024 (Boys)	2024-06-08	2024-06-08	Rapid	Overberg (WOS)	5	4	2	Yes	Analysis
15	Eden Chess Trials 2 2024 (U16)	2024-04-13	2024-04-20	Standard	Eden (WEG)	10	10	9	Yes	Analysis
16	Western Cape HS Individuals Championship 2024 (U15 Boys)	2024-03-21	2024-03-22	Standard	Overberg (WOS)	6	6	4	Yes	Analysis
17	Eden School Chess Trials 1 2024 (U15 Boys)	2024-03-09	2024-03-09	Standard	Eden (WEG)	5	5	3	Yes	Analysis
18	Mossel Bay Open 2023 (B)	2023-09-30	2023-10-01	Standard	Eden (WEG)	6	6	4.5	Yes	Analysis
19	Mossel Bay Open 2023 (Blitz)	2023-09-29	2023-09-29	Blitz	Eden (WEG)	6	6	2	Yes	Analysis
20	Western Cape PS Individuals 2023 (U13 Boys)	2023-05-05	2023-05-06	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
21	Inter Club Blitz 1 2023	2023-05-24	2023-05-24	Blitz	Eden (WEG)	10	8	3	Yes	Analysis
22	Eden Trials 2+3 2023 (U14)	2023-04-15	2023-05-13	Standard	Eden (WEG)	10	10	6.5	Yes	Analysis
23	Heidelberg Big Pumpkin Chess Tournament 2023 (A+B)	2023-04-01	2023-04-01	Standard	Eden (WEG)	5	5	3	Yes	Analysis
24	Eden Trails 1 2023 (U13 Boys)	2023-03-11	2023-03-11	Standard	Eden (WEG)	5	5	4	Yes	Analysis
25	Mossel Bay Schools Trials 2 2023 (U13 Boys)	2023-02-18	2023-02-18	Standard	Eden (WEG)	5	5	4	Yes	Analysis
26	Mossel Bay Schools Trials 1 2023 (U13 Boys)	2023-01-28	2023-01-28	Standard	Eden (WEG)	5	5	4	Yes	Analysis
27	Mossel Bay Open 2022 (B)	2022-09-30	2022-10-02	Standard	Eden (WEG)	6	6	3	Yes	Analysis
28	Interclub Blitz Evening (Mossel Bay)	2022-10-26	2022-10-26	Blitz	Eden (WEG)	6	6	4.5	Yes	Analysis
29	Knysna Oyster Festival Rapid Chess 2022 (A)	2022-07-02	2022-07-02	Rapid	Eden (WEG)	5	5	2.5	Yes	Analysis
30	Interclub Blitz Evening 2022	2022-06-08	2022-06-08	Blitz	Eden (WEG)	6	6	3	Yes	Analysis
31	George Open 2022 (B)	2022-06-11	2022-06-11	Standard	Eden (WEG)	5	5	1	Yes	Analysis
32	Western Cape Schools 2022 (U13 Boys)	2022-05-28	2022-05-29	Standard	Cape Winelands (WCW)	6	6	4	Yes	Analysis
33	Eden Proewe 2 2022 (O13 Seuns)	2022-04-09	2022-04-09	Standard	Eden (WEG)	5	5	4	Yes	Analysis
34	Eden Proewe 1 2022 (O13 Seuns)	2022-03-12	2022-03-12	Standard	Eden (WEG)	5	5	3	Yes	Analysis
35	Mosselbaai Skole Skaak Proewe 1 2022 (U13 Boys)	2022-01-29	2022-01-29	Standard	Eden (WEG)	5	5	4	Yes	Analysis
36	Eden Schools Closed Trials 1 2020 (U11 Boys)	2020-03-07	2020-03-07	Standard	Eden (WEG)	5	5	4	Yes	Analysis
37	Mossel Bay Trials 2 2020 (U11)	2020-02-15	2020-02-15	Standard	Eden (WEG)	5	5	4	Yes	Analysis
38	Mossel Bay Trials 1 2020 (U11)	2020-02-01	2020-02-01	Standard	Eden (WEG)	5	5	3	Yes	Analysis

#	Games	Start				End
1	10	Tournament Western Cape Top Schools Championship 2024				Tournament InterClub Blitz 4 2024
		date 2024-08-30	rnd 3	type Standard	result 1	date 2024-09-04	rnd 6	type Blitz	result 1
		Opponent Kiewiet, B (B Jay)				Opponent Adams, J (Jay-D)
2	8	Tournament Mossel Bay Schools Trials 2 2025				Tournament Eden Rapid 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-23	rnd 3	type Rapid	result 0.5
		Opponent Mccreedy, J (James)				Opponent Meyer, J (Jared)
3	8	Tournament Mossel Bay Open 2023				Tournament Eden School Chess Trials 1 2024
		date 2023-09-30	rnd 2	type Standard	result 1	date 2024-03-09	rnd 3	type Standard	result 1
		Opponent Janse Van Rensburg, S (Stephan)				Opponent Cooper, S (Shayden)

#	Games	Start				End
1	11	Tournament Eden Chess Union League 2024				Tournament Eden Schools Chess Trials 1 2025
		date 2024-10-12	rnd 4	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Greeff, M (Mari)				Opponent Etsala-Kourou, B (Billy)
2	8	Tournament Mossel Bay Open 2023				Tournament Eden School Chess Trials 1 2024
		date 2023-09-30	rnd 2	type Standard	result 1	date 2024-03-09	rnd 3	type Standard	result 1
		Opponent Janse Van Rensburg, S (Stephan)				Opponent Cooper, S (Shayden)
3	7	Tournament Western Cape HS Individuals Championship 2024				Tournament Eden Chess Trials 2 2024
		date 2024-03-21	rnd 4	type Standard	result 1	date 2024-04-13	rnd 4	type Standard	result 1
		Opponent Matinywa, T (Thobani)				Opponent Adams, L (Lincoln)

#	Games	Start				End
1	6	Tournament Eden Rapid 2025				Tournament Knysna Oyster Festival Rapid 2025
		date 2025-02-23	rnd 6	type Rapid	result 1	date 2025-07-12	rnd 5	type Rapid	result 1
		Opponent Baadjies, L (Lando)				Opponent Jafta, L (Levi)
2	4	Tournament Western Cape - Kings and Queens 2024				Tournament Eden Rapid 2025
		date 2024-06-08	rnd 4	type Rapid	result 1	date 2025-02-23	rnd 3	type Rapid	result 0.5
		Opponent Neethling, S (Sean)				Opponent Meyer, J (Jared)
3	3	Tournament Knysna Oyster Festival Rapid Chess 2022				Tournament Knysna Oyster Festival Rapid Chess 2022
		date 2022-07-02	rnd 1	type Rapid	result 1	date 2022-07-02	rnd 3	type Rapid	result 0.5
		Opponent Michaels, A (Antonio)				Opponent Botha, R (Ralph)

#	Games	Start				End
1	6	Tournament InterClub Blitz 4 2024				Tournament InterClub Blitz 4 2024
		date 2024-09-04	rnd 1	type Blitz	result 1	date 2024-09-04	rnd 6	type Blitz	result 1
		Opponent Marner, E (Elizane)				Opponent Adams, J (Jay-D)
2	6	Tournament Interclub Blitz Evening				Tournament Inter Club Blitz 1 2023
		date 2022-10-26	rnd 3	type Blitz	result 0.5	date 2023-05-24	rnd 2	type Blitz	result 1
		Opponent Cornforth, K (Kayleigh)				Opponent Cornforth, K (Kayleigh)
3	3	Tournament Interclub Blitz Evening 2022				Tournament Interclub Blitz Evening
		date 2022-06-08	rnd 5	type Blitz	result 1	date 2022-10-26	rnd 1	type Blitz	result 1
		Opponent Barends, X (Xavier)				Opponent Petersen, S (Shenwin)

#	Games	Start				End
1	8	Tournament Western Cape Top Schools Championship 2024				Tournament InterClub Blitz 4 2024
		date 2024-09-01	rnd 5	type Standard	result 1	date 2024-09-04	rnd 6	type Blitz	result 1
		Opponent Van Staaden, D (Darren)				Opponent Adams, J (Jay-D)
2	7	Tournament Mossel Bay Schools Trials 2 2025				Tournament Eden Rapid 2025
		date 2025-02-22	rnd 1	type Standard	result 1	date 2025-02-23	rnd 2	type Rapid	result 1
		Opponent Mccreedy, J (James)				Opponent Stembok, E (Embrose)
3	7	Tournament Western Cape HS Individuals Championship 2024				Tournament Eden Chess Trials 2 2024
		date 2024-03-21	rnd 4	type Standard	result 1	date 2024-04-13	rnd 4	type Standard	result 1
		Opponent Matinywa, T (Thobani)				Opponent Adams, L (Lincoln)

#	Games	Start				End
1	8	Tournament Eden Chess Union League 2024				Tournament Eden Schools Chess Trials 1 2025
		date 2024-10-12	rnd 4	type Standard	result 1	date 2025-03-08	rnd 1	type Standard	result 1
		Opponent Greeff, M (Mari)				Opponent Nomdo, L (Luciano)
2	7	Tournament Western Cape HS Individuals Championship 2024				Tournament Eden Chess Trials 2 2024
		date 2024-03-21	rnd 4	type Standard	result 1	date 2024-04-13	rnd 4	type Standard	result 1
		Opponent Matinywa, T (Thobani)				Opponent Adams, L (Lincoln)
3	5	Tournament Eden Chess Trials 2 2024				Tournament Eden Chess Trials 2 2024
		date 2024-04-20	rnd 6	type Standard	result 1	date 2024-04-20	rnd 10	type Standard	result 1
		Opponent Buys, D (Denee)				Opponent Jacobs, S (Shaquille)

#	Games	Start				End
1	6	Tournament Eden Rapid 2025				Tournament Knysna Oyster Festival Rapid 2025
		date 2025-02-23	rnd 6	type Rapid	result 1	date 2025-07-12	rnd 5	type Rapid	result 1
		Opponent Baadjies, L (Lando)				Opponent Jafta, L (Levi)
2	3	Tournament Western Cape - Kings and Queens 2024				Tournament Eden Rapid 2025
		date 2024-06-08	rnd 4	type Rapid	result 1	date 2025-02-23	rnd 2	type Rapid	result 1
		Opponent Neethling, S (Sean)				Opponent Stembok, E (Embrose)
3	2	Tournament Knysna Oyster Festival Rapid Chess 2022				Tournament Knysna Oyster Festival Rapid Chess 2022
		date 2022-07-02	rnd 1	type Rapid	result 1	date 2022-07-02	rnd 2	type Rapid	result 1
		Opponent Michaels, A (Antonio)				Opponent Daniels, R (Reuben)

#	Games	Start				End
1	6	Tournament InterClub Blitz 4 2024				Tournament InterClub Blitz 4 2024
		date 2024-09-04	rnd 1	type Blitz	result 1	date 2024-09-04	rnd 6	type Blitz	result 1
		Opponent Marner, E (Elizane)				Opponent Adams, J (Jay-D)
2	5	Tournament Interclub Blitz Evening				Tournament Inter Club Blitz 1 2023
		date 2022-10-26	rnd 4	type Blitz	result 1	date 2023-05-24	rnd 2	type Blitz	result 1
		Opponent Cornforth, K (Kayleigh)				Opponent Cornforth, K (Kayleigh)
3	3	Tournament Interclub Blitz Evening 2022				Tournament Interclub Blitz Evening
		date 2022-06-08	rnd 5	type Blitz	result 1	date 2022-10-26	rnd 1	type Blitz	result 1
		Opponent Barends, X (Xavier)				Opponent Petersen, S (Shenwin)

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	Claassen ,R (Raynier)	5	1	-255	5	1	-255	0	0	0	0	0	0
1	Claassen ,R (Raynier)	5	1599.7	1344.7	5	1609.1	1344.7	0	0	0	0	0	0
2	Kiewiet ,B (B Jay)	5	2	-85	5	2	-85	0	0	0	0	0	0
2	Kiewiet ,B (B Jay)	5	1327.5	1242.5	5	1339.1	1242.5	0	0	0	0	0	0
3	Petersen ,S (Shenwin)	5	3	85	3	2	141.7	0	0	0	2	1	0
3	Petersen ,S (Shenwin)	5	1319.4	1404.4	3	1342.7	1461.1	0	0	0	2	1148.6	1319.4
4	Cornforth ,K (Kayleigh)	5	3	85	1	0.5	0	0	0	0	4	2.5	106.2
4	Cornforth ,K (Kayleigh)	5	1591.4	1676.4	1	1648.4	1591.4	0	0	0	4	1136.6	1697.7
5	Nell ,C (Cohan)	4	4	425	4	4	425	0	0	0	0	0	0
5	Nell ,C (Cohan)	4	1242.1	1667.1	4	1245.1	1667.1	0	0	0	0	0	0
6	Michaels ,J (Joshua)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
6	Michaels ,J (Joshua)	3	1364.1	1222.4	3	1385.8	1222.4	0	0	0	0	0	0
7	Scholtz ,H (Hanko)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
7	Scholtz ,H (Hanko)	3	1563.3	1421.6	3	1593.2	1421.6	0	0	0	0	0	0
8	Bukula ,S (Sivuyisile)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
8	Bukula ,S (Sivuyisile)	3	1532.9	1674.5	3	1535.1	1674.5	0	0	0	0	0	0
9	Hone ,R (Ryan)	3	0	-425	1	0	-425	0	0	0	2	0	-425
9	Hone ,R (Ryan)	3	1419.6	994.6	1	1663.7	994.6	0	0	0	2	1200	994.6
10	Nortje ,P (Pieter)	3	0	-425	1	0	-425	0	0	0	2	0	-425
10	Nortje ,P (Pieter)	3	1210.4	785.4	1	1200	785.4	0	0	0	2	1213.2	785.4

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Claassen, M (Mervin)

Ratings

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Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms