Chess South Africa Ratings Database

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Personal

Bosman, R (Ruan)

Chess SA id

1110315096

FIDE id

Date of birth

2011-07-11 (U16)

Gender

Male

Region

Cape Winelands (WCW)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-10-18

Personal details last changed

1900-01-01

Junior GPX Games

18.1

Junior GPX Points

1071.9

Item	Main	Standard	Rapid	Blitz
Rating	1193.7	1199.3	1189	1200
Raw rating	1148	1166	1152	1200
Weighted rating	1193.7	1199.3	1189	1200
Weighted performance	0	0	0	0
Floor	722.1	723.9	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	178.6	174	177.5	165.8
Highest rating	1222.1 2025-03-01	1223.9 2025-03-01	1200 2025-03-01	1200 2025-03-01
Highest raw rating	1222.1 2025-03-01	1223.9 2025-03-01	1200 2025-03-01	1200 2025-03-01
Highest weighted rating	1222.1 2025-03-01	1223.9 2025-03-01	1200 2025-03-01	1200 2025-03-01
Highest weighted performance	0 1900-01-01	0 1900-01-01	0 1900-01-01	0 1900-01-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-3.9	-2.7	-3.4	0
New rating	1189.8	1196.6	1185.6	1200
Analysis
Rating	1193.7	1199.3	1189	1200
Raw rating	1148	1166	1152	1200
Weighted rating	1193.7	1199.3	1189
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	722.1	723.9	700	700
Max/Min rating change allowed	178.6	174	177.5	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	1148	1166	1152	1200
New weighted rating	1189.8	1196.6	1185.6	1200
New weighted performance	0	0	0	0
Temp new rating	1189.8	1196.6	1185.6	1200
Temp new rating +/-	-3.9	-2.7	-3.4	0
Final new rating +/-	-3.9	-2.7	-3.4	0
New rating	1189.8	1196.6	1185.6	1200
New K-factor	36	36	36	36
New floor	722.1	723.9	700	700

Item	Main	Standard	Rapid
	0	0	0
	20	16	4
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	20	16	4

Games since
	Main 20	Standard 16		Rapid 4		Blitz 0
Gender	Male
Age group	U16
Region	Cape Winelands (WCW)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
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	-1		-1		-1
Male	-1		-1		-1
U16	-1		-1		-1
U16 Male	-1		-1		-1
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	20	6	30	-170	1252.5	1082.5
Standard	16	5.5	34.38	-132.8	1248.6	1115.8
Rapid	4	0.5	12.5	-318.8	1268.1	949.3
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	20	6	30	-170	1252.5	1082.5
Standard	16	5.5	34.38	-132.8	1248.6	1115.8
Rapid	4	0.5	12.5	-318.8	1268.1	949.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1148	1166	1152	1200
2025-09-30	1174.9	1202	1152	1200
2025-09-01	1174.9	1202	1152	1200
2025-08-01	1201.9	1202	1200	1200
2025-07-01	1201.9	1202	1200	1200
2025-06-01	1201.8	1201.9	1200	1200
2025-05-01	1201.6	1201.7	1200	1200
2025-04-01	1200	1199.5	1200	1200
2025-03-01	1222.1	1223.9	1200	1200
2025-02-01	1200	1200	1200	1200
2025-01-01	1200	1200	1200	1200
2024-12-01	1200	1200	1200	1200
2024-11-01	1200	1200	1200	1200
2024-10-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-08-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-09-01	1200	1200	1200	1200
2024-05-01	1200	1200	1200	1200
2024-04-01	1200	1200	1200	1200
2024-03-01	1200	1200	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	Paarl Boys' High School Chess Festival 2025 (C)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	1.5	Yes	Analysis
2	Cape Winelands Top Schools 2025 (U15)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	4	0.5	Yes	Analysis
3	Cape Winelands Schools Prestige 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	1	Yes	Analysis
4	Cape Winelands Schools - Trials 1 2025 (U15 Boys)	2025-02-08	2025-02-08	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Paarl Boys' High School Chess Festival 2025 (C)	2025-10-17	2025-10-18	Standard	Cape Winelands (WCW)	6	6	1.5	Yes	Analysis
2	Cape Winelands Top Schools 2025 (U15)	2025-08-23	2025-08-23	Rapid	Cape Winelands (WCW)	5	4	0.5	Yes	Analysis
3	Cape Winelands Schools Prestige 2025 (U15 Boys)	2025-03-08	2025-03-08	Standard	Cape Winelands (WCW)	5	5	1	Yes	Analysis
4	Cape Winelands Schools - Trials 1 2025 (U15 Boys)	2025-02-08	2025-02-08	Standard	Cape Winelands (WCW)	5	5	3	Yes	Analysis

#	Games	Start				End
1	2	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-08	rnd 4	type Standard	result 1	date 2025-02-08	rnd 5	type Standard	result 1
		Opponent Bell, A (Aaron)				Opponent Fourie, O (Ockert)
2	1	Tournament Paarl Boys' High School Chess Festival 2025				Tournament Paarl Boys' High School Chess Festival 2025
		date 2025-10-18	rnd 6	type Standard	result 0.5	date 2025-10-18	rnd 6	type Standard	result 0.5
		Opponent Groenewald, G (Garth)				Opponent Groenewald, G (Garth)
3	1	Tournament Paarl Boys' High School Chess Festival 2025				Tournament Paarl Boys' High School Chess Festival 2025
		date 2025-10-17	rnd 4	type Standard	result 1	date 2025-10-17	rnd 4	type Standard	result 1
		Opponent Williams, L (Layla)				Opponent Williams, L (Layla)

#	Games	Start				End
1	2	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-08	rnd 4	type Standard	result 1	date 2025-02-08	rnd 5	type Standard	result 1
		Opponent Bell, A (Aaron)				Opponent Fourie, O (Ockert)
2	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Van Eeden, F (Fj)				Opponent Van Eeden, F (Fj)
3	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-08	rnd 2	type Standard	result 1	date 2025-02-08	rnd 2	type Standard	result 1
		Opponent Liebenberg, T (Tiaan)				Opponent Liebenberg, T (Tiaan)

#	Games	Start				End
1	1	Tournament Cape Winelands Top Schools 2025				Tournament Cape Winelands Top Schools 2025
		date 2025-08-23	rnd 2	type Rapid	result 0.5	date 2025-08-23	rnd 2	type Rapid	result 0.5
		Opponent Vosloo, A (Armand)				Opponent Vosloo, A (Armand)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-08	rnd 4	type Standard	result 1	date 2025-02-08	rnd 5	type Standard	result 1
		Opponent Bell, A (Aaron)				Opponent Fourie, O (Ockert)
2	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Van Eeden, F (Fj)				Opponent Van Eeden, F (Fj)
3	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-08	rnd 2	type Standard	result 1	date 2025-02-08	rnd 2	type Standard	result 1
		Opponent Liebenberg, T (Tiaan)				Opponent Liebenberg, T (Tiaan)

#	Games	Start				End
1	2	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-08	rnd 4	type Standard	result 1	date 2025-02-08	rnd 5	type Standard	result 1
		Opponent Bell, A (Aaron)				Opponent Fourie, O (Ockert)
2	1	Tournament Cape Winelands Schools Prestige 2025				Tournament Cape Winelands Schools Prestige 2025
		date 2025-03-08	rnd 3	type Standard	result 1	date 2025-03-08	rnd 3	type Standard	result 1
		Opponent Van Eeden, F (Fj)				Opponent Van Eeden, F (Fj)
3	1	Tournament Cape Winelands Schools - Trials 1 2025				Tournament Cape Winelands Schools - Trials 1 2025
		date 2025-02-08	rnd 2	type Standard	result 1	date 2025-02-08	rnd 2	type Standard	result 1
		Opponent Liebenberg, T (Tiaan)				Opponent Liebenberg, T (Tiaan)

No games found.

#	Games	Start				End

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	Milhomem ,L (Lucas)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Milhomem ,L (Lucas)	1	1452.1	1027.1	1	1441.5	1027.1	0	0	0	0	0	0
2	Williams ,L (Layla)	1	1	425	1	1	425	0	0	0	0	0	0
2	Williams ,L (Layla)	1	1193.7	1618.7	1	1191.7	1618.7	0	0	0	0	0	0
3	Human ,E (Evert)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Human ,E (Evert)	1	1222.1	797.1	1	1241.6	797.1	0	0	0	0	0	0
4	Van Eeden ,F (Fj)	1	1	425	1	1	425	0	0	0	0	0	0
4	Van Eeden ,F (Fj)	1	1190.8	1615.8	1	1172.2	1615.8	0	0	0	0	0	0
5	Toerien ,W (William)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Toerien ,W (William)	1	1199.4	774.4	1	1176.5	774.4	0	0	0	0	0	0
6	Ngombo ,P (Prince`)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Ngombo ,P (Prince`)	1	1446.1	1021.1	1	1398.1	1021.1	0	0	0	0	0	0
7	Jephtha ,U (Uziel)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Jephtha ,U (Uziel)	1	1179.4	754.4	1	1159.6	754.4	0	0	0	0	0	0
8	Uys ,X (Xander)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Uys ,X (Xander)	1	1291.5	866.5	1	1297.1	866.5	0	0	0	0	0	0
9	Gibbon ,R (Ryan)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Gibbon ,R (Ryan)	1	1236.2	811.2	1	1241.6	811.2	0	0	0	0	0	0
10	Jacobs ,S (Shane)	1	0	-425	1	0	-425	0	0	0	0	0	0
10	Jacobs ,S (Shane)	1	1167.9	742.9	1	1199.7	742.9	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Bosman, 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