Chess South Africa Ratings Database

PLAYER PAGE

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

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1186.1	1194	1182.4	1200
Raw rating	1148	1166	1152	1200
Weighted rating	1186.1	1194	1182.4	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	-3.6	-2.5	-3	0
New rating	1182.5	1191.5	1179.4	1200
Analysis
Rating	1186.1	1194	1182.4	1200
Raw rating	1148	1166	1152	1200
Weighted rating	1186.1	1194	1182.4
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	1182.5	1191.5	1179.4	1200
New weighted performance	0	0	0	0
Temp new rating	1182.5	1191.5	1179.4	1200
Temp new rating +/-	-3.6	-2.5	-3	0
Final new rating +/-	-3.6	-2.5	-3	0
New rating	1182.5	1191.5	1179.4	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
2026-01-01	1148	1166	1152	1200
2025-11-30	1148	1166	1152	1200
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
2024-11-01	1200	1200	1200	1200
2024-07-01	1200	1200	1200	1200
2024-06-01	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

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	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