Chess South Africa Ratings Database

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Personal

Kotze, R (Ruan)

Chess SA id

110086188

FIDE id

Date of birth

2010-06-21 (U16)

Gender

Male

Region

Mangaung (FMB)

Citizen

RSA

Titles

Chess SA registered

Yes

Last active game

2025-02-22

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1409.9	1429.5	1342.6	811.8
Raw rating	1409.9	1429.5	1342.6	811.8
Weighted rating	1406.8	1429.3	1323.8	811.8
Weighted performance	1212.8	1241.1	1116.3	0
Floor	961.5	957.2	882.9	500
K-factor	32	32	36	40
Min/Max rating change allowed	123	119.6	135.3	288.3
Highest rating	1477.4 2019-07-01	1473 2019-07-01	1396.9 2024-02-01	1200 2018-02-01
Highest raw rating	1461.5 2019-08-01	1457.2 2019-08-01	1382.9 2024-03-01	811.8 2024-02-01
Highest weighted rating	1401.5 2025-08-01	1425.6 2025-08-01	1382.9 2024-11-01	811.8 2024-11-01
Highest weighted performance	1477.4 2019-07-01	1473 2019-07-01	1396.9 2024-02-01	1200 2018-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	1.2	0	0
New rating	1409.9	1430.7	1342.6	811.8
Analysis
Rating	1409.9	1429.5	1342.6	811.8
Raw rating	1409.9	1429.5	1342.6	811.8
Weighted rating	1406.8	1429.3	1323.8
Weighted performance	1212.8	1241.1	1116.3
K-factor	32	32	36	40
Floor	961.5	957.2	882.9	500
Max/Min rating change allowed	123	119.6	135.3	288.3
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	1409.9	1429.5	1342.6	811.8
New weighted rating	1408.7	1430.7	1331	811.8
New weighted performance	1212.3	1240.6	1115.9	0
Temp new rating	1409.9	1430.7	1342.6	811.8
Temp new rating +/-	0	1.2	0	0
Final new rating +/-	0	1.2	0	0
New rating	1409.9	1430.7	1342.6	811.8
New K-factor	32	32	36	40
New floor	961.5	957.2	882.9	500

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	5	5	0	0
	39	15	24	0
	10	5	5	0
	16	6	10	0
	0	0	0	0
History	182	136	39	7

Games since
	Main 44	Standard 20		Rapid 24		Blitz 0
Gender	Male
Age group	U16
Region	Mangaung (FMB)
Province	Free State (FS)
Main
	RSA		Province		Region
Overall	2071		23		19
Male	1710		22		18
U16	308		2		2
U16 Male	241		2		2
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	776		22		21
Male	645		19		18
U16	121		2		2
U16 Male	93		2		2
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 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	5	2.5	50	0	1341.5	1341.5
Standard	5	2.5	50	0	1341.5	1341.5
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	149	97.5	65.44	131.2	1122.2	1253.4
Standard	103	69	66.99	144.4	1110	1254.4
Rapid	39	22.5	57.69	65.4	1202	1267.4
Blitz	7	6	85.71	303.6	857.8	1161.4

Date	Main	Standard	Rapid	Blitz
2025-09-30	1409.9	1429.5	1342.6	811.8
2025-09-01	1409.9	1429.5	1342.6	811.8
2025-08-01	1409.9	1429.5	1342.6	811.8
2025-07-01	1409.9	1429.5	1342.6	811.8
2025-06-01	1409.9	1429.5	1342.6	811.8
2025-05-01	1409.9	1429.5	1342.6	811.8
2025-04-01	1409.9	1429.5	1342.6	811.8
2025-03-01	1409.9	1429.5	1342.6	811.8
2025-02-01	1421.2	1448.3	1342.6	811.8
2025-01-01	1421.2	1448.3	1342.6	811.8
2024-12-01	1421.2	1448.3	1342.6	811.8
2024-11-01	1421.2	1448.3	1342.6	811.8
2024-10-01	1421.2	1448.3	1342.6	811.8
2024-09-01	1421.2	1448.3	1342.6	811.8
2024-08-01	1421.3	1448.3	1319.2	811.8
2024-07-01	1421.3	1448.3	1319.2	811.8
2024-06-01	1421.3	1448.3	1319.2	811.8
2024-08-01	1374	1383	1319.2	811.8
2024-04-01	1350.3	1360	1319.2	811.8
2024-03-01	1371.5	1360	1382.9	811.8
2024-02-01	1279.7	1330.9	934.8	811.8
2024-01-01	1270	1330.9	824.4	811.8
2023-12-01	1270	1330.9	772.6	811.8
2023-11-01	1270	1330.9	772.6	811.8

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	Grey College Team Championship 2025 (Prestige)	2025-02-21	2025-02-22	Standard	Mangaung (FMB)	5	5	2.5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Grey College Team Championship 2025 (Prestige)	2025-02-21	2025-02-22	Standard	Mangaung (FMB)	5	5	2.5	Yes	Analysis
2	Bloemfontein Highschool League 02 Aug 2024 (U19A)	2024-08-02	2024-08-02	Rapid	Mangaung (FMB)	5	5	3.5	Yes	Analysis
3	Spartan Bishops Chess Championships 2024 (Knights)	2024-05-04	2024-05-05	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
4	Mangaung Metro Chess 12-13 April 2024 (B)	2024-04-12	2024-04-13	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis
5	Bloemfontein Highschool League 2024 (U17A)	2024-03-08	2024-03-08	Rapid	Mangaung (FMB)	5	4	1	Yes	Analysis
6	Mangaung Metro Chess 10 February 2024 (B)	2024-02-10	2024-02-10	Rapid	Mangaung (FMB)	5	5	4	Yes	Analysis
7	Grey College Team Championship 2024 (B)	2024-02-23	2024-02-24	Standard	Mangaung (FMB)	5	5	4.5	Yes	Analysis
8	Bloemfontein High School League 16 February 2024 (U15A)	2024-02-16	2024-02-16	Rapid	Mangaung (FMB)	5	5	5	Yes	Analysis
9	Kings & Queens Chess 27 January 2024 (B)	2024-01-27	2024-01-27	Rapid	Mangaung (FMB)	5	5	3	Yes	Analysis
10	Morris Club Championship 2023	2023-07-28	2023-07-28	Rapid	Mangaung (FMB)	5	5	2	Yes	Analysis
11	Inter Regional Chess Championship 2023 (U14)	2023-05-19	2023-05-20	Standard	Mangaung (FMB)	5	5	3	Yes	Analysis
12	2022 South African Junior Team Chess Championships (U14 Open)	2022-12-04	2022-12-08	Standard	4 Knights (4K)	7	6	3.5	Yes	Analysis
13	Mangaung Metro Chess 30 July 2022 (B)	2022-07-30	2022-07-30	Rapid	Mangaung (FMB)	5	5	1	Yes	Analysis
14	Mangaung Metro Chess 22 January 2022 (B)	2022-01-22	2022-01-22	Rapid	Mangaung (FMB)	5	5	3	Yes	Analysis
15	Mangaung Metro Chess February 2020 (D)	2020-02-21	2020-02-22	Standard	Mangaung (FMB)	5	5	3.5	Yes	Analysis
16	Mangaung Metro Chess 17-18 January 2020 (D)	2020-01-17	2020-01-18	Standard	Mangaung (FMB)	5	5	4.5	Yes	Analysis
17	2019 South African Junior Team Championships (U10D)	2020-01-04	2020-01-08	Standard	4 Knights (4K)	7	6	1.5	Yes	Analysis
18	Mangaung Metro Chess October 2019 (D)	2019-10-11	2019-10-12	Standard	Mangaung (FMB)	5	5	3.5	Yes	Analysis
19	Mangaung Metro July Trials 2019 (U10)	2019-07-19	2019-07-20	Standard	Mangaung (FMB)	5	5	5	Yes	Analysis
20	Mangaung Metro Chess 31 May to 1 June 2019 (E)	2019-05-31	2019-06-01	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis
21	Inter Regional Chess Championship 2019 (U10)	2019-05-10	2019-05-11	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis
22	Mangaung Metro Chess 15-16 March 2019 (E)	2019-03-15	2019-03-16	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis
23	Mangaung Metro Chess 1-2 February 2019 (E)	2019-02-01	2019-02-02	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis
24	Mangaung Metro Chess12 & 13 October 2018 (E)	2018-10-12	2018-10-13	Standard	Mangaung (FMB)	5	5	4	Yes	Analysis
25	Mangaung Metro Chess 27-28 July 2018 (D)	2018-07-27	2018-07-28	Standard	Mangaung (FMB)	5	5	2	Yes	Analysis
26	Smart Chess Blitz 2018 (U10)	2018-03-03	2018-03-03	Blitz	Mangaung (FMB)	7	7	6	Yes	Analysis
27	Mangaung Metro Chess 9 - 10 March 2018 (D)	2018-03-09	2018-03-10	Standard	Mangaung (FMB)	5	5	2.5	Yes	Analysis
28	Mangaung Metro Chess 2 & 3 February 2018 (D)	2018-02-02	2018-02-03	Standard	Mangaung (FMB)	5	5	3	Yes	Analysis
29	South African Junior Team Championships 2017 (U8B+U8 Girls)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	6	2	Yes	Analysis

#	Games	Start				End
1	11	Tournament Mangaung Metro Chess 10 February 2024				Tournament Grey College Team Championship 2024
		date 2024-02-10	rnd 5	type Rapid	result 1	date 2024-02-24	rnd 5	type Standard	result 1
		Opponent Melville, J (Joalize)				Opponent Caronti, M (Matteo)
2	10	Tournament Mangaung Metro Chess 31 May to 1 June 2019				Tournament Mangaung Metro Chess October 2019
		date 2019-06-01	rnd 5	type Standard	result 1	date 2019-10-12	rnd 4	type Standard	result 1
		Opponent Steyn, J (Johannes)				Opponent De Villiers, H (Hj)
3	9	Tournament 2019 South African Junior Team Championships				Tournament Mangaung Metro Chess February 2020
		date 2020-01-08	rnd 7	type Standard	result 1	date 2020-02-22	rnd 3	type Standard	result 1
		Opponent Masilela, K (Kholwa-Ku-Zimu)				Opponent Mahlakolisane, M (Mpho)

#	Games	Start				End
1	10	Tournament Mangaung Metro Chess 31 May to 1 June 2019				Tournament Mangaung Metro Chess October 2019
		date 2019-06-01	rnd 5	type Standard	result 1	date 2019-10-12	rnd 4	type Standard	result 1
		Opponent Steyn, J (Johannes)				Opponent De Villiers, H (Hj)
2	9	Tournament 2019 South African Junior Team Championships				Tournament Mangaung Metro Chess February 2020
		date 2020-01-08	rnd 7	type Standard	result 1	date 2020-02-22	rnd 3	type Standard	result 1
		Opponent Masilela, K (Kholwa-Ku-Zimu)				Opponent Mahlakolisane, M (Mpho)
3	8	Tournament Mangaung Metro Chess 15-16 March 2019				Tournament Inter Regional Chess Championship 2019
		date 2019-03-15	rnd 2	type Standard	result 1	date 2019-05-11	rnd 4	type Standard	result 1
		Opponent Boje, E (Ewald)				Opponent Bantseke, B (Boikanyo)

#	Games	Start				End
1	6	Tournament Mangaung Metro Chess 10 February 2024				Tournament Bloemfontein High School League 16 February 2024
		date 2024-02-10	rnd 5	type Rapid	result 1	date 2024-02-16	rnd 5	type Rapid	result 1
		Opponent Melville, J (Joalize)				Opponent Ngowi, L (Leo)
2	5	Tournament Bloemfontein Highschool League 02 Aug 2024				Tournament Bloemfontein Highschool League 02 Aug 2024
		date 2024-08-02	rnd 1	type Rapid	result 0.5	date 2024-08-02	rnd 5	type Rapid	result 0.5
		Opponent Mokgasi, K (Kananelo)				Opponent Mpakama, J (Junior)
3	4	Tournament Morris Club Championship 2023				Tournament Kings & Queens Chess 27 January 2024
		date 2023-07-28	rnd 5	type Rapid	result 1	date 2024-01-27	rnd 3	type Rapid	result 1
		Opponent Collings, K (Keaton)				Opponent Badenhorst, M (Matthew Peter)

#	Games	Start				End
1	5	Tournament Smart Chess Blitz 2018				Tournament Smart Chess Blitz 2018
		date 2018-03-03	rnd 1	type Blitz	result 1	date 2018-03-03	rnd 5	type Blitz	result 1
		Opponent Gouws, R (Ruan)				Opponent Beelders, K (Kyra)
2	1	Tournament Smart Chess Blitz 2018				Tournament Smart Chess Blitz 2018
		date 2018-03-03	rnd 7	type Blitz	result 1	date 2018-03-03	rnd 7	type Blitz	result 1
		Opponent Boje, E (Ewald)				Opponent Boje, E (Ewald)

#	Games	Start				End
1	8	Tournament Mangaung Metro Chess 10 February 2024				Tournament Grey College Team Championship 2024
		date 2024-02-10	rnd 5	type Rapid	result 1	date 2024-02-23	rnd 2	type Standard	result 1
		Opponent Melville, J (Joalize)				Opponent Titus, M (Morn�)
2	8	Tournament Mangaung Metro Chess 15-16 March 2019				Tournament Inter Regional Chess Championship 2019
		date 2019-03-15	rnd 2	type Standard	result 1	date 2019-05-11	rnd 4	type Standard	result 1
		Opponent Boje, E (Ewald)				Opponent Bantseke, B (Boikanyo)
3	7	Tournament Mangaung Metro Chess 31 May to 1 June 2019				Tournament Mangaung Metro Chess October 2019
		date 2019-06-01	rnd 5	type Standard	result 1	date 2019-10-11	rnd 1	type Standard	result 1
		Opponent Steyn, J (Johannes)				Opponent Louw, D (Delvin)

#	Games	Start				End
1	8	Tournament Mangaung Metro Chess 15-16 March 2019				Tournament Inter Regional Chess Championship 2019
		date 2019-03-15	rnd 2	type Standard	result 1	date 2019-05-11	rnd 4	type Standard	result 1
		Opponent Boje, E (Ewald)				Opponent Bantseke, B (Boikanyo)
2	7	Tournament Mangaung Metro Chess 31 May to 1 June 2019				Tournament Mangaung Metro Chess October 2019
		date 2019-06-01	rnd 5	type Standard	result 1	date 2019-10-11	rnd 1	type Standard	result 1
		Opponent Steyn, J (Johannes)				Opponent Louw, D (Delvin)
3	6	Tournament Mangaung Metro Chess 12-13 April 2024				Tournament Spartan Bishops Chess Championships 2024
		date 2024-04-13	rnd 3	type Standard	result 1	date 2024-05-04	rnd 3	type Standard	result 1
		Opponent Bangile, K (Kabelo)				Opponent Ross, E (Ebenezer)

#	Games	Start				End
1	6	Tournament Mangaung Metro Chess 10 February 2024				Tournament Bloemfontein High School League 16 February 2024
		date 2024-02-10	rnd 5	type Rapid	result 1	date 2024-02-16	rnd 5	type Rapid	result 1
		Opponent Melville, J (Joalize)				Opponent Ngowi, L (Leo)
2	4	Tournament Morris Club Championship 2023				Tournament Kings & Queens Chess 27 January 2024
		date 2023-07-28	rnd 5	type Rapid	result 1	date 2024-01-27	rnd 3	type Rapid	result 1
		Opponent Collings, K (Keaton)				Opponent Badenhorst, M (Matthew Peter)
3	3	Tournament Mangaung Metro Chess 10 February 2024				Tournament Mangaung Metro Chess 10 February 2024
		date 2024-02-10	rnd 1	type Rapid	result 1	date 2024-02-10	rnd 3	type Rapid	result 1
		Opponent Wang, Z (Zirou)				Opponent Els, R (Ruben)

#	Games	Start				End
1	5	Tournament Smart Chess Blitz 2018				Tournament Smart Chess Blitz 2018
		date 2018-03-03	rnd 1	type Blitz	result 1	date 2018-03-03	rnd 5	type Blitz	result 1
		Opponent Gouws, R (Ruan)				Opponent Beelders, K (Kyra)
2	1	Tournament Smart Chess Blitz 2018				Tournament Smart Chess Blitz 2018
		date 2018-03-03	rnd 7	type Blitz	result 1	date 2018-03-03	rnd 7	type Blitz	result 1
		Opponent Boje, E (Ewald)				Opponent Boje, E (Ewald)

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	Pelesa ,O (Oratilwe)	4	4	425	3	3	425	1	1	425	0	0	0
1	Pelesa ,O (Oratilwe)	4	1138.2	1563.2	3	1070.1	1563.2	1	1200	1563.2	0	0	0
2	Steyn ,J (Johannes)	3	3	425	3	3	425	0	0	0	0	0	0
2	Steyn ,J (Johannes)	3	1205.8	1630.8	3	1201.3	1630.8	0	0	0	0	0	0
3	De Villiers ,H (Hj)	3	3	425	3	3	425	0	0	0	0	0	0
3	De Villiers ,H (Hj)	3	1211	1636	3	1211.6	1636	0	0	0	0	0	0
4	Kriel ,R (Ruan)	3	2	141.7	1	1	425	2	1	0	0	0	0
4	Kriel ,R (Ruan)	3	1002	1143.6	1	821.6	1427	2	659.4	1002	0	0	0
5	Lottering ,JG (Gerhard)	3	1	-141.7	1	0	-425	1	0	-425	1	1	425
5	Lottering ,JG (Gerhard)	3	909.9	768.2	1	1044.6	484.9	1	512.2	484.9	1	512.2	1334.9
6	Melville ,J (Jason)	3	1	-141.7	0	0	0	2	0	-425	1	1	425
6	Melville ,J (Jason)	3	1046.4	904.7	0	0	0	2	1076.6	621.4	1	755	1471.4
7	Louw ,D (Delvin)	2	2	425	2	2	425	0	0	0	0	0	0
7	Louw ,D (Delvin)	2	1208.8	1633.8	2	1207.2	1633.8	0	0	0	0	0	0
8	Van Lill ,A (Amore)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
8	Van Lill ,A (Amore)	2	1225.6	1438.1	2	1213.7	1438.1	0	0	0	0	0	0
9	Swanepoel ,W (Wj)	2	0	-425	2	0	-425	0	0	0	0	0	0
9	Swanepoel ,W (Wj)	2	1186.4	761.4	2	1182.4	761.4	0	0	0	0	0	0
10	Ross ,E (Ebenezer)	2	2	425	2	2	425	0	0	0	0	0	0
10	Ross ,E (Ebenezer)	2	1292.3	1717.3	2	1275.5	1717.3	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Kotze, R (Ruan)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms