Chess South Africa Ratings Database

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Personal

Coetzer, R (Ruan)

Chess SA id

107093975

FIDE id

Date of birth

2007-11-14 (U20)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-08-10

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1286.8	1213.2	1307.6	1200
Raw rating	1286.8	1213.2	1307.6	1200
Weighted rating	1277.1	1213	1293.7	1200
Weighted performance	1068.1	724.8	0	0
Floor	786.8	713.2	807.6	700
K-factor	36	36	36	36
Min/Max rating change allowed	146.5	162.7	142.2	165.8
Highest rating	1286.8 2024-09-01	1213.2 2024-04-01	1494.6 2024-07-01	1200 2018-10-01
Highest raw rating	1286.8 2024-09-01	1213.2 2024-04-01	1307.6 2024-09-01	1200 2024-02-01
Highest weighted rating	1269.1 2025-08-01	1212.7 2025-08-01	1282.6 2025-08-01	1200 2018-10-01
Highest weighted performance	1278.2 2024-08-01	1200 2018-02-01	1494.6 2024-07-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1286.8	1213.2	1307.6	1200
Analysis
Rating	1286.8	1213.2	1307.6	1200
Raw rating	1286.8	1213.2	1307.6	1200
Weighted rating	1277.1	1213	1293.7
Weighted performance	1068.1	724.8	0
K-factor	36	36	36	36
Floor	786.8	713.2	807.6	700
Max/Min rating change allowed	146.5	162.7	142.2	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	1286.8	1213.2	1307.6	1200
New weighted rating	1279.2	1213.1	1296.7	1200
New weighted performance	1060.3	717.6	0	0
Temp new rating	1286.8	1213.2	1307.6	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1286.8	1213.2	1307.6	1200
New K-factor	36	36	36	36
New floor	786.8	713.2	807.6	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	22	10	12
	0	0	0
	0	0	0
	0	0	0
History	51	39	12

Games since
	Main 22	Standard 10		Rapid 12		Blitz 0
Gender	Male
Age group	U20
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	46	28	60.87	92.4	1175.4	1267.8
Standard	34	18.5	54.41	37.5	1146.4	1183.9
Rapid	12	9.5	79.17	247.9	1257.8	1505.7
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1286.8	1213.2	1307.6	1200
2025-09-30	1286.8	1213.2	1307.6	1200
2025-09-01	1286.8	1213.2	1307.6	1200
2025-08-01	1286.8	1213.2	1307.6	1200
2025-07-01	1286.8	1213.2	1307.6	1200
2025-06-01	1286.8	1213.2	1307.6	1200
2025-05-01	1286.8	1213.2	1307.6	1200
2025-04-01	1286.8	1213.2	1307.6	1200
2025-03-01	1286.8	1213.2	1307.6	1200
2025-02-01	1286.8	1213.2	1307.6	1200
2025-01-01	1286.8	1213.2	1307.6	1200
2024-12-01	1286.8	1213.2	1307.6	1200
2024-11-01	1286.8	1213.2	1307.6	1200
2024-10-01	1286.8	1213.2	1307.6	1200
2024-09-01	1286.8	1213.2	1307.6	1200
2024-08-01	1261.9	1213.2	1273.8	1200
2024-07-01	1214.1	1213.2	1200	1200
2024-09-01	1214.1	1213.2	1200	1200
2024-05-01	1214.1	1213.2	1200	1200
2024-04-01	1214.1	1213.2	1200	1200
2024-03-01	1206	1207.4	1200	1200
2024-02-01	1206	1207.4	1200	1200
2024-01-01	1206	1207.4	1200	1200
2023-12-01	1206	1207.4	1200	1200

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	Bojanala's Kings & Queens Rapid and Doubles 2024 (Open)	2024-08-10	2024-08-10	Rapid	Bojanala Platina (NBR)	7	7	4.5	Yes	Analysis
2	Bojanala's Clash Of Schools - Secondary 2024 (High School Seniors)	2024-07-27	2024-07-27	Rapid	Bojanala Platina (NBR)	5	5	5	Yes	Analysis
3	Bojanala Silwerrand's Rating Implosion 2024 (Queens)	2024-03-16	2024-03-16	Standard	Bojanala Platina (NBR)	5	5	1	Yes	Analysis
4	Schoemies' Kings & Queens 2024 (Knights)	2024-03-02	2024-03-02	Standard	Bojanala Platina (NBR)	5	5	3.5	Yes	Analysis
5	JNW Club - Trinityhouse Little Falls Open 2020 (D)	2020-03-14	2020-03-14	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
6	JNW Club - Trinityhouse Randpark Ridge Open 2020 (D)	2020-02-22	2020-02-22	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
7	JNW Chess Club - Muldersdrif 2019 (B)	2019-10-18	2019-10-18	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
8	JNW Club - Maragon Open 2019 (D)	2019-08-03	2019-08-03	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis
9	D2 Schools Individuals 2019 (U13)	2019-05-18	2019-05-18	Standard	West Rand (GWR)	5	4	2	Yes	Analysis

#	Games	Start				End
1	5	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Bojanala's Clash Of Schools - Secondary 2024
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2024-07-27	rnd 5	type Rapid	result 1
		Opponent Bosman, R (Rudi)				Opponent Petlele, T (Tshiamo)
2	4	Tournament Bojanala's Kings & Queens Rapid and Doubles 2024				Tournament Bojanala's Kings & Queens Rapid and Doubles 2024
		date 2024-08-10	rnd 4	type Rapid	result 0.5	date 2024-08-10	rnd 7	type Rapid	result 1
		Opponent Otto, H (Henning)				Opponent Potgieter, R (Reinhardt)
3	4	Tournament JNW Club - Trinityhouse Randpark Ridge Open 2020				Tournament JNW Club - Trinityhouse Randpark Ridge Open 2020
		date 2020-02-22	rnd 1	type Standard	result 1	date 2020-02-22	rnd 4	type Standard	result 1
		Opponent Danks, S (Stuart)				Opponent Maharaj, A (Aditi)

#	Games	Start				End
1	4	Tournament JNW Club - Trinityhouse Randpark Ridge Open 2020				Tournament JNW Club - Trinityhouse Randpark Ridge Open 2020
		date 2020-02-22	rnd 1	type Standard	result 1	date 2020-02-22	rnd 4	type Standard	result 1
		Opponent Danks, S (Stuart)				Opponent Maharaj, A (Aditi)
2	3	Tournament Schoemies' Kings & Queens 2024				Tournament Schoemies' Kings & Queens 2024
		date 2024-03-02	rnd 1	type Standard	result 1	date 2024-03-02	rnd 3	type Standard	result 1
		Opponent Van Der Merwe, J (Josua)				Opponent Seleke, T (Tlotlang)
3	3	Tournament JNW Club - Trinityhouse Little Falls Open 2020				Tournament JNW Club - Trinityhouse Little Falls Open 2020
		date 2020-03-14	rnd 2	type Standard	result 1	date 2020-03-14	rnd 4	type Standard	result 1
		Opponent Jewatzchewitz, J (Jaco)				Opponent Arokiam, E (Ethan)

#	Games	Start				End
1	5	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Bojanala's Clash Of Schools - Secondary 2024
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2024-07-27	rnd 5	type Rapid	result 1
		Opponent Bosman, R (Rudi)				Opponent Petlele, T (Tshiamo)
2	4	Tournament Bojanala's Kings & Queens Rapid and Doubles 2024				Tournament Bojanala's Kings & Queens Rapid and Doubles 2024
		date 2024-08-10	rnd 4	type Rapid	result 0.5	date 2024-08-10	rnd 7	type Rapid	result 1
		Opponent Otto, H (Henning)				Opponent Potgieter, R (Reinhardt)
3	1	Tournament Bojanala's Kings & Queens Rapid and Doubles 2024				Tournament Bojanala's Kings & Queens Rapid and Doubles 2024
		date 2024-08-10	rnd 2	type Rapid	result 1	date 2024-08-10	rnd 2	type Rapid	result 1
		Opponent Coetzee, W (Willie)				Opponent Coetzee, W (Willie)

No games found.

#	Games	Start				End

#	Games	Start				End
1	5	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Bojanala's Clash Of Schools - Secondary 2024
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2024-07-27	rnd 5	type Rapid	result 1
		Opponent Bosman, R (Rudi)				Opponent Petlele, T (Tshiamo)
2	4	Tournament JNW Club - Trinityhouse Randpark Ridge Open 2020				Tournament JNW Club - Trinityhouse Randpark Ridge Open 2020
		date 2020-02-22	rnd 1	type Standard	result 1	date 2020-02-22	rnd 4	type Standard	result 1
		Opponent Danks, S (Stuart)				Opponent Maharaj, A (Aditi)
3	3	Tournament Bojanala's Kings & Queens Rapid and Doubles 2024				Tournament Bojanala's Kings & Queens Rapid and Doubles 2024
		date 2024-08-10	rnd 5	type Rapid	result 1	date 2024-08-10	rnd 7	type Rapid	result 1
		Opponent Kekana, T (Tebogo)				Opponent Potgieter, R (Reinhardt)

#	Games	Start				End
1	4	Tournament JNW Club - Trinityhouse Randpark Ridge Open 2020				Tournament JNW Club - Trinityhouse Randpark Ridge Open 2020
		date 2020-02-22	rnd 1	type Standard	result 1	date 2020-02-22	rnd 4	type Standard	result 1
		Opponent Danks, S (Stuart)				Opponent Maharaj, A (Aditi)
2	3	Tournament JNW Club - Trinityhouse Little Falls Open 2020				Tournament JNW Club - Trinityhouse Little Falls Open 2020
		date 2020-03-14	rnd 2	type Standard	result 1	date 2020-03-14	rnd 4	type Standard	result 1
		Opponent Jewatzchewitz, J (Jaco)				Opponent Arokiam, E (Ethan)
3	3	Tournament JNW Club - Maragon Open 2019				Tournament JNW Club - Maragon Open 2019
		date 2019-08-03	rnd 3	type Standard	result 1	date 2019-08-03	rnd 5	type Standard	result 1
		Opponent Dinham, K (Kiara)				Opponent Botha, M (Marcus)

#	Games	Start				End
1	5	Tournament Bojanala's Clash Of Schools - Secondary 2024				Tournament Bojanala's Clash Of Schools - Secondary 2024
		date 2024-07-27	rnd 1	type Rapid	result 1	date 2024-07-27	rnd 5	type Rapid	result 1
		Opponent Bosman, R (Rudi)				Opponent Petlele, T (Tshiamo)
2	3	Tournament Bojanala's Kings & Queens Rapid and Doubles 2024				Tournament Bojanala's Kings & Queens Rapid and Doubles 2024
		date 2024-08-10	rnd 5	type Rapid	result 1	date 2024-08-10	rnd 7	type Rapid	result 1
		Opponent Kekana, T (Tebogo)				Opponent Potgieter, R (Reinhardt)
3	1	Tournament Bojanala's Kings & Queens Rapid and Doubles 2024				Tournament Bojanala's Kings & Queens Rapid and Doubles 2024
		date 2024-08-10	rnd 2	type Rapid	result 1	date 2024-08-10	rnd 2	type Rapid	result 1
		Opponent Coetzee, W (Willie)				Opponent Coetzee, W (Willie)

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	Van Wyk ,R (Ruan)	3	1.5	0	2	0.5	-212.5	1	1	425	0	0	0
1	Van Wyk ,R (Ruan)	3	1242.5	1242.5	2	1200	1030	1	1264	1667.5	0	0	0
2	Seleke ,T (Tlotlang)	1	1	425	1	1	425	0	0	0	0	0	0
2	Seleke ,T (Tlotlang)	1	1392.7	1817.7	1	1391.1	1817.7	0	0	0	0	0	0
3	Mundalamo ,A (Arehone)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Mundalamo ,A (Arehone)	1	1218	793	1	1218.4	793	0	0	0	0	0	0
4	Brummelkamp ,G (Gideon)	1	1	425	1	1	425	0	0	0	0	0	0
4	Brummelkamp ,G (Gideon)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
5	Danks ,S (Stuart)	1	1	425	1	1	425	0	0	0	0	0	0
5	Danks ,S (Stuart)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	Van Dyk ,C (Christiaan)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Van Dyk ,C (Christiaan)	1	949.8	524.8	1	967.2	524.8	0	0	0	0	0	0
7	Smit ,CJ (Tiaan Johannes)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Smit ,CJ (Tiaan Johannes)	1	1093.7	668.7	1	1004.6	668.7	0	0	0	0	0	0
8	Botha ,M (Marcus)	1	1	425	1	1	425	0	0	0	0	0	0
8	Botha ,M (Marcus)	1	1007.6	1432.6	1	1008.2	1432.6	0	0	0	0	0	0
9	Nke ,RB (Rebaone Bokang)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Nke ,RB (Rebaone Bokang)	1	1341.3	916.3	1	1315.4	916.3	0	0	0	0	0	0
10	Metene ,R (Remofilwe)	1	1	425	1	1	425	0	0	0	0	0	0
10	Metene ,R (Remofilwe)	1	1200	1625	1	1200	1625	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Coetzer, R (Ruan)

Ratings

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Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms