Chess South Africa Ratings Database

PLAYER PAGE

Personal

Loon, M (Marc)

Chess SA id

1700148035

FIDE id

Date of birth

1970-04-04 (Adult)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-09-23

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1564.3	1556.6	1392.4	1387.8
Raw rating	1564.3	1556.6	1392.4	1387.8
Weighted rating	1513.6	1512.1	1392.1	1349.2
Weighted performance	1439.5	1453.9	0	1323
Floor	1070.7	1070.7	919	887.8
K-factor	32	32	32	36
Min/Max rating change allowed	98.7	99.8	126.1	126.9
Highest rating	1573.8 2022-12-01	1570.7 2025-07-01	1476.4 2024-06-01	1387.8 2025-11-01
Highest raw rating	1570.7 2025-08-01	1570.7 2025-07-01	1419 2025-03-01	1387.8 2025-11-01
Highest weighted rating	1497.6 2025-11-01	1497.7 2025-11-01	1382 2025-08-01	1339.3 2025-11-01
Highest weighted performance	1573.8 2022-12-01	1567.7 2022-12-01	1476.4 2024-06-01	1379.7 2024-11-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0.5	0
New rating	1564.3	1556.6	1393	1387.8
Analysis
Rating	1564.3	1556.6	1392.4	1387.8
Raw rating	1564.3	1556.6	1392.4	1387.8
Weighted rating	1513.6	1512.1	1392.1
Weighted performance	1439.5	1453.9	0
K-factor	32	32	32	36
Floor	1070.7	1070.7	919	887.8
Max/Min rating change allowed	98.7	99.8	126.1	126.9
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	1564.3	1556.6	1392.4	1387.8
New weighted rating	1520.6	1518.3	1393	1353.6
New weighted performance	1429.7	1443.7	0	1313.8
Temp new rating	1564.3	1556.6	1393	1387.8
Temp new rating +/-	0	0	0.5	0
Final new rating +/-	0	0	0.5	0
New rating	1564.3	1556.6	1393	1387.8
New K-factor	32	32	32	36
New floor	1070.7	1070.7	919	887.8

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	68	23	13	32
	33	18	6	9
	20	14	6	0
	3	3	0	0
	0	0	0	0
History	124	58	25	41

Games since
	Main 101	Standard 41		Rapid 19		Blitz 41
Gender	Male
Age group	Adult
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	845		307		108
Male	749		268		91
Adult	344		127		53
Adult Male	321		121		49
Standard
	RSA		Province		Region
Overall	822		320		108
Male	725		275		88
Adult	321		127		51
Adult Male	300		120		46
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	199		66		39
Male	185		60		34
Adult	150		49		25
Adult Male	141		47		24


	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	68	35.5	52.21	18.8	1567	1585.7
Standard	23	13	56.52	55.4	1566.8	1622.2
Rapid	13	6	46.15	-32.7	1576.4	1543.8
Blitz	32	16.5	51.56	13.3	1563.3	1576.6
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	124	64.5	52.02	17.1	1529.5	1546.6
Standard	58	31	53.45	29.3	1513.8	1543.1
Rapid	25	13	52	17	1533.5	1550.5
Blitz	41	20.5	50	0	1549.1	1549.1

Date	Main	Standard	Rapid	Blitz
2026-01-01	1564.3	1556.6	1392.4	1387.8
2025-11-30	1564.3	1556.6	1392.4	1387.8
2025-11-01	1564.3	1556.6	1392.4	1387.8
2025-09-30	1570.7	1570.7	1392.4	1346.7
2025-09-01	1570.7	1570.7	1392.4	1346.7
2025-08-01	1570.7	1570.7	1392.4	1346.7
2025-07-01	1569.2	1570.7	1392.4	1356.3
2025-06-01	1500.5	1492	1392.4	1356.3
2025-05-01	1500.5	1492	1392.4	1356.3
2025-04-01	1467.2	1455.6	1419	1356.3
2025-03-01	1467.2	1455.6	1419	1356.3
2025-02-01	1449.3	1455.6	1393.3	1356.3
2025-01-01	1448.8	1455.6	1393.3	1320.5
2024-12-01	1448.8	1455.6	1393.3	1320.5
2024-11-01	1468.7	1476.1	1393.3	1320.5
2024-10-01	1465.1	1469.4	1393.3	1300
2024-09-01	1465.1	1469.4	1393.3	1300
2024-11-01	1465.1	1469.4	1393.3	1300
2024-07-01	1465.1	1469.4	1393.3	1300
2024-06-01	1450.1	1469.4	1330.7	1300
2024-05-01	1355	1366.8	1330.7	1300
2024-04-01	1355	1366.8	1330.7	1300
2024-03-01	1355	1366.8	1330.7	1300
2024-02-01	1355	1366.8	1330.7	1300

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	Randburg Winter Swiss 2025	2025-07-29	2025-09-16	Standard	Johannesburg Metro (GJM)	8	7	4	Yes	Analysis
2	Randburg Spring Blitz 2025	2025-09-23	2025-09-23	Blitz	Johannesburg Metro (GJM)	7	7	4	Yes	Analysis
3	Randburg Club Champs Blitz 2025	2025-07-08	2025-07-08	Blitz	Johannesburg Metro (GJM)	7	7	4	Yes	Analysis
4	South African Open 2025 (Blitz)	2025-07-02	2025-07-02	Blitz	Johannesburg Metro (GJM)	9	9	4.5	Yes	Analysis
5	Neil Savage Memorial Randburg Club Champs 2025	2025-05-06	2025-06-24	Standard	Johannesburg Metro (GJM)	8	8	4.5	Yes	Analysis
6	Randburg Autumn Rapid 2025	2025-04-15	2025-04-22	Rapid	Johannesburg Metro (GJM)	7	7	3	Yes	Analysis
7	Randburg Chess Club New Year Swiss 2025	2025-02-11	2025-04-01	Standard	Johannesburg Metro (GJM)	8	8	4.5	Yes	Analysis
8	Randburg Chess Club New Year Rapid 2025	2025-01-28	2025-02-04	Rapid	Johannesburg Metro (GJM)	6	6	3	Yes	Analysis
9	Randburg New Year Blitz 2025	2025-01-21	2025-01-21	Blitz	Johannesburg Metro (GJM)	9	9	4	Yes	Analysis
10	Randburg Summer Swiss 2024	2024-10-29	2024-11-26	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
11	Randburg Chess Club Blitz Championship 2024	2024-10-22	2024-10-22	Blitz	Johannesburg Metro (GJM)	9	9	4	Yes	Analysis
12	Randburg Spring Swiss 2024	2024-08-20	2024-10-08	Standard	Johannesburg Metro (GJM)	7	6	3	Yes	Analysis
13	Randburg Autumn Rapid 2024	2024-05-28	2024-06-04	Rapid	Johannesburg Metro (GJM)	6	6	4	Yes	Analysis
14	Randburg Chess Club Championship 2024	2024-04-09	2024-05-21	Standard	Johannesburg Metro (GJM)	7	7	4.5	Yes	Analysis
15	Randburg Mid-Year Themed Rapid 2023	2023-05-30	2023-06-06	Rapid	Johannesburg Metro (GJM)	6	6	3	Yes	Analysis
16	Randburg Autumn Swiss 2023	2023-04-11	2023-05-23	Standard	Johannesburg Metro (GJM)	7	7	3.5	Yes	Analysis
17	Randburg New Year Swiss 2023	2023-01-31	2023-03-14	Standard	Johannesburg Metro (GJM)	7	7	3	Yes	Analysis
18	Randburg Summer Swiss 2022	2022-10-25	2022-12-06	Standard	Johannesburg Metro (GJM)	7	3	2	Yes	Analysis

#	Games	Start				End
1	5	Tournament Randburg Autumn Rapid 2024				Tournament Randburg Spring Swiss 2024
		date 2024-06-04	rnd 4	type Rapid	result 1	date 2024-09-03	rnd 3	type Standard	result 1
		Opponent Tracey, T (Terence)				Opponent Metcalfe, AR (Allister)
2	3	Tournament Randburg Winter Swiss 2025				Tournament Randburg Spring Blitz 2025
		date 2025-09-16	rnd 8	type Standard	result 1	date 2025-09-23	rnd 2	type Blitz	result 1
		Opponent Sparks, SJW (Stephen)				Opponent Machet, J (Jordan)
3	3	Tournament Randburg Club Champs Blitz 2025				Tournament Randburg Club Champs Blitz 2025
		date 2025-07-08	rnd 3	type Blitz	result 1	date 2025-07-08	rnd 5	type Blitz	result 1
		Opponent Jacobs, T (Tristan Lee)				Opponent Malaza, M (Malibongwe)

#	Games	Start				End
1	5	Tournament Randburg Chess Club New Year Swiss 2025				Tournament Neil Savage Memorial Randburg Club Champs 2025
		date 2025-03-25	rnd 7	type Standard	result 1	date 2025-05-20	rnd 3	type Standard	result 1
		Opponent Kruger, I (Ivan)				Opponent Foley, PJ (Patrick James)
2	4	Tournament Randburg Chess Club Championship 2024				Tournament Randburg Spring Swiss 2024
		date 2024-05-14	rnd 6	type Standard	result 0.5	date 2024-09-03	rnd 3	type Standard	result 1
		Opponent Roux, P (Paul)				Opponent Metcalfe, AR (Allister)
3	2	Tournament Neil Savage Memorial Randburg Club Champs 2025				Tournament Neil Savage Memorial Randburg Club Champs 2025
		date 2025-06-10	rnd 6	type Standard	result 1	date 2025-06-17	rnd 7	type Standard	result 1
		Opponent Kruger, I (Ivan)				Opponent Mendelsohn, DC (David Charles)

#	Games	Start				End
1	3	Tournament Randburg Chess Club New Year Rapid 2025				Tournament Randburg Chess Club New Year Rapid 2025
		date 2025-01-28	rnd 2	type Rapid	result 1	date 2025-02-04	rnd 4	type Rapid	result 1
		Opponent Molema, W (Warner)				Opponent Durow, NL (Neil)
2	3	Tournament Randburg Autumn Rapid 2024				Tournament Randburg Autumn Rapid 2024
		date 2024-06-04	rnd 4	type Rapid	result 1	date 2024-06-04	rnd 6	type Rapid	result 1
		Opponent Tracey, T (Terence)				Opponent Ngubeni, JM (Jackie)
3	1	Tournament Randburg Autumn Rapid 2025				Tournament Randburg Autumn Rapid 2025
		date 2025-04-22	rnd 6	type Rapid	result 1	date 2025-04-22	rnd 6	type Rapid	result 1
		Opponent Kruger, I (Ivan)				Opponent Kruger, I (Ivan)

#	Games	Start				End
1	3	Tournament Randburg Club Champs Blitz 2025				Tournament Randburg Club Champs Blitz 2025
		date 2025-07-08	rnd 3	type Blitz	result 1	date 2025-07-08	rnd 5	type Blitz	result 1
		Opponent Jacobs, T (Tristan Lee)				Opponent Malaza, M (Malibongwe)
2	3	Tournament South African Open 2025				Tournament Randburg Club Champs Blitz 2025
		date 2025-07-02	rnd 8	type Blitz	result 1	date 2025-07-08	rnd 1	type Blitz	result 1
		Opponent Nemusombori, L (Livhuwani Nathan)				Opponent Steyn, C (Christiaan)
3	2	Tournament South African Open 2025				Tournament South African Open 2025
		date 2025-07-02	rnd 1	type Blitz	result 0.5	date 2025-07-02	rnd 2	type Blitz	result 1
		Opponent Mahlangu, S (Sello)				Opponent Zondi, O (Owethu)

#	Games	Start				End
1	5	Tournament Randburg Autumn Rapid 2024				Tournament Randburg Spring Swiss 2024
		date 2024-06-04	rnd 4	type Rapid	result 1	date 2024-09-03	rnd 3	type Standard	result 1
		Opponent Tracey, T (Terence)				Opponent Metcalfe, AR (Allister)
2	3	Tournament Randburg Club Champs Blitz 2025				Tournament Randburg Club Champs Blitz 2025
		date 2025-07-08	rnd 3	type Blitz	result 1	date 2025-07-08	rnd 5	type Blitz	result 1
		Opponent Jacobs, T (Tristan Lee)				Opponent Malaza, M (Malibongwe)
3	3	Tournament South African Open 2025				Tournament Randburg Club Champs Blitz 2025
		date 2025-07-02	rnd 8	type Blitz	result 1	date 2025-07-08	rnd 1	type Blitz	result 1
		Opponent Nemusombori, L (Livhuwani Nathan)				Opponent Steyn, C (Christiaan)

#	Games	Start				End
1	3	Tournament Randburg Chess Club Championship 2024				Tournament Randburg Spring Swiss 2024
		date 2024-05-21	rnd 7	type Standard	result 1	date 2024-09-03	rnd 3	type Standard	result 1
		Opponent Jones, GTD (Graham)				Opponent Metcalfe, AR (Allister)
2	2	Tournament Neil Savage Memorial Randburg Club Champs 2025				Tournament Neil Savage Memorial Randburg Club Champs 2025
		date 2025-06-10	rnd 6	type Standard	result 1	date 2025-06-17	rnd 7	type Standard	result 1
		Opponent Kruger, I (Ivan)				Opponent Mendelsohn, DC (David Charles)
3	2	Tournament Neil Savage Memorial Randburg Club Champs 2025				Tournament Neil Savage Memorial Randburg Club Champs 2025
		date 2025-05-13	rnd 2	type Standard	result 1	date 2025-05-20	rnd 3	type Standard	result 1
		Opponent Snyckers, FA (Frank Alexander)				Opponent Foley, PJ (Patrick James)

#	Games	Start				End
1	3	Tournament Randburg Chess Club New Year Rapid 2025				Tournament Randburg Chess Club New Year Rapid 2025
		date 2025-01-28	rnd 2	type Rapid	result 1	date 2025-02-04	rnd 4	type Rapid	result 1
		Opponent Molema, W (Warner)				Opponent Durow, NL (Neil)
2	3	Tournament Randburg Autumn Rapid 2024				Tournament Randburg Autumn Rapid 2024
		date 2024-06-04	rnd 4	type Rapid	result 1	date 2024-06-04	rnd 6	type Rapid	result 1
		Opponent Tracey, T (Terence)				Opponent Ngubeni, JM (Jackie)
3	1	Tournament Randburg Autumn Rapid 2025				Tournament Randburg Autumn Rapid 2025
		date 2025-04-22	rnd 6	type Rapid	result 1	date 2025-04-22	rnd 6	type Rapid	result 1
		Opponent Kruger, I (Ivan)				Opponent Kruger, I (Ivan)

#	Games	Start				End
1	3	Tournament Randburg Club Champs Blitz 2025				Tournament Randburg Club Champs Blitz 2025
		date 2025-07-08	rnd 3	type Blitz	result 1	date 2025-07-08	rnd 5	type Blitz	result 1
		Opponent Jacobs, T (Tristan Lee)				Opponent Malaza, M (Malibongwe)
2	3	Tournament South African Open 2025				Tournament Randburg Club Champs Blitz 2025
		date 2025-07-02	rnd 8	type Blitz	result 1	date 2025-07-08	rnd 1	type Blitz	result 1
		Opponent Nemusombori, L (Livhuwani Nathan)				Opponent Steyn, C (Christiaan)
3	2	Tournament Randburg New Year Blitz 2025				Tournament Randburg New Year Blitz 2025
		date 2025-01-21	rnd 6	type Blitz	result 1	date 2025-01-21	rnd 7	type Blitz	result 1
		Opponent Jones, M (Michael)				Opponent Mungal, S (Shane)

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	Molema ,W (Warner)	6	6	425	3	3	425	3	3	425	0	0	0
1	Molema ,W (Warner)	6	1194.9	1619.9	3	1184.6	1619.9	3	1136.8	1619.9	0	0	0
2	Snyckers ,FA (Frank Alexander)	5	1	-255	5	1	-255	0	0	0	0	0	0
2	Snyckers ,FA (Frank Alexander)	5	1535.1	1280.1	5	1536.4	1280.1	0	0	0	0	0	0
3	Essop ,R (Rashied)	5	2	-85	3	1	-141.7	1	0	-425	1	1	425
3	Essop ,R (Rashied)	5	1488.1	1403.1	3	1501	1346.5	1	1412.7	1063.1	1	1232.5	1913.1
4	Hodgson ,TF (Timothy Fish)	5	1	-255	2	1	0	2	0	-425	1	0	-425
4	Hodgson ,TF (Timothy Fish)	5	1626.8	1371.8	2	1626.4	1626.8	2	1650.2	1201.8	1	1567.6	1201.8
5	Tak ,R (Rannveer)	5	0	-425	2	0	-425	0	0	0	3	0	-425
5	Tak ,R (Rannveer)	5	1790.5	1365.5	2	1786.3	1365.5	0	0	0	3	1582.6	1365.5
6	Metcalfe ,AR (Allister Richard)	4	2	0	2	1	0	2	1	0	0	0	0
6	Metcalfe ,AR (Allister Richard)	4	1721.5	1721.5	2	1740.4	1721.5	2	1695.8	1721.5	0	0	0
7	Durow ,NL (Neil)	4	1	-212.5	1	0	-425	2	1	0	1	0	-425
7	Durow ,NL (Neil)	4	1668.4	1455.9	1	1646.3	1243.4	2	1711.8	1668.4	1	1804.8	1243.4
8	Ngubeni ,JM (Jackie)	4	2	0	1	1	425	2	1	0	1	0	-425
8	Ngubeni ,JM (Jackie)	4	1509.1	1509.1	1	1394.6	1934.1	2	1587.9	1509.1	1	1501.5	1084.1
9	Sparks ,SJW (Stephen)	3	1	-141.7	3	1	-141.7	0	0	0	0	0	0
9	Sparks ,SJW (Stephen)	3	1467.8	1326.1	3	1423.9	1326.1	0	0	0	0	0	0
10	Tracey ,T (Terence)	3	3	425	2	2	425	1	1	425	0	0	0
10	Tracey ,T (Terence)	3	1320.6	1745.6	2	1371.8	1745.6	1	1236	1745.6	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Loon, M (Marc)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms