Chess South Africa Ratings Database

PLAYER PAGE

Personal

Keulder, R (Ruben)

Chess SA id

1110312155

FIDE id

Date of birth

2011-03-10 (U16)

Gender

Male

Region

Ekurhuleni (GE)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-30

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1185.1	1182.1	1200	1200
Raw rating	1157.5	1148.6	1200	1200
Weighted rating	1185.1	1182.1	1200	1200
Weighted performance	0	0	0	0
Floor	707.4	709.4	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	176.2	178.4	165.8	165.8
Highest rating	1207.4 2025-09-01	1209.4 2025-09-01	1200 2024-10-01	1200 2024-10-01
Highest raw rating	1207.4 2025-09-01	1209.4 2025-09-01	1200 2024-10-01	1200 2024-10-01
Highest weighted rating	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01	1200 2024-10-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1200 2024-10-01	1200 2024-10-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-2.6	-3.1	0	0
New rating	1182.6	1179	1200	1200
Analysis
Rating	1185.1	1182.1	1200	1200
Raw rating	1157.5	1148.6	1200	1200
Weighted rating	1185.1	1182.1	1200
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	707.4	709.4	700	700
Max/Min rating change allowed	176.2	178.4	165.8	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	1157.5	1148.6	1200	1200
New weighted rating	1182.6	1179	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1182.6	1179	1200	1200
Temp new rating +/-	-2.6	-3.1	0	0
Final new rating +/-	-2.6	-3.1	0	0
New rating	1182.6	1179	1200	1200
New K-factor	36	36	36	36
New floor	707.4	709.4	700	700

Item	Main	Standard
	0	0
	13	13
	5	5
	0	0
	0	0
	0	0
History	18	18

Games since
	Main 18	Standard 18		Rapid 0		Blitz 0
Gender	Male
Age group	U16
Region	Ekurhuleni (GE)
Province	Gauteng (GT)
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	13	5	38.46	-98.1	1216.3	1118.2
Standard	13	5	38.46	-98.1	1216.3	1118.2
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	18	6	33.33	-141.7	1240.2	1098.6
Standard	18	6	33.33	-141.7	1240.2	1098.6
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1157.5	1148.6	1200	1200
2025-11-30	1157.5	1148.6	1200	1200
2025-11-01	1157.5	1148.6	1200	1200
2025-09-30	1207.4	1209.4	1200	1200
2025-09-01	1207.4	1209.4	1200	1200
2025-08-01	1191.7	1190	1200	1200
2025-07-01	1191.7	1190	1200	1200
2025-06-01	1191.6	1189.8	1200	1200
2025-05-01	1192.6	1191.2	1200	1200
2025-04-01	1192.6	1191.2	1200	1200
2025-03-01	1192.6	1191.2	1200	1200
2025-02-01	1191.4	1189.7	1200	1200
2025-01-01	1171.4	1165.6	1200	1200
2024-12-01	1171.4	1165.6	1200	1200
2024-11-01	1171.4	1165.6	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	2025 Gauteng Top Schools Teams (U15)	2025-08-30	2025-08-30	Standard	Tshwane (GTP)	5	5	1	Yes	Analysis
2	D5 Teams 2025 (U15 Open)	2025-08-16	2025-08-16	Standard	Ekurhuleni (GE)	3	3	2	Yes	Analysis
3	East Rand Chess Club Open 2025 (B)	2025-05-03	2025-05-03	Standard	Ekurhuleni (GE)	5	5	2	Yes	Analysis
4	Gauteng Top Schools 2024 (U13 Open)	2024-10-04	2024-10-04	Standard	Ekurhuleni (GE)	5	5	1	Yes	Analysis

#	Games	Start				End
1	2	Tournament D5 Teams 2025				Tournament D5 Teams 2025
		date 2025-08-16	rnd 1	type Standard	result 1	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Nkosi, L (Lindokuhle)				Opponent Calits, J (Jacques)
2	1	Tournament 2025 Gauteng Top Schools Teams				Tournament 2025 Gauteng Top Schools Teams
		date 2025-08-30	rnd 5	type Standard	result 1	date 2025-08-30	rnd 5	type Standard	result 1
		Opponent Mokoena, K (Khumo)				Opponent Mokoena, K (Khumo)
3	1	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 4	type Standard	result 1	date 2025-05-03	rnd 4	type Standard	result 1
		Opponent Hains, M (Micah)				Opponent Hains, M (Micah)

#	Games	Start				End
1	2	Tournament D5 Teams 2025				Tournament D5 Teams 2025
		date 2025-08-16	rnd 1	type Standard	result 1	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Nkosi, L (Lindokuhle)				Opponent Calits, J (Jacques)
2	1	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 4	type Standard	result 1	date 2025-05-03	rnd 4	type Standard	result 1
		Opponent Hains, M (Micah)				Opponent Hains, M (Micah)
3	1	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 2	type Standard	result 1	date 2025-05-03	rnd 2	type Standard	result 1
		Opponent Chisango, T (Trafford)				Opponent Chisango, T (Trafford)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament D5 Teams 2025				Tournament D5 Teams 2025
		date 2025-08-16	rnd 1	type Standard	result 1	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Nkosi, L (Lindokuhle)				Opponent Calits, J (Jacques)
2	1	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 4	type Standard	result 1	date 2025-05-03	rnd 4	type Standard	result 1
		Opponent Hains, M (Micah)				Opponent Hains, M (Micah)
3	1	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 2	type Standard	result 1	date 2025-05-03	rnd 2	type Standard	result 1
		Opponent Chisango, T (Trafford)				Opponent Chisango, T (Trafford)

#	Games	Start				End
1	2	Tournament D5 Teams 2025				Tournament D5 Teams 2025
		date 2025-08-16	rnd 1	type Standard	result 1	date 2025-08-16	rnd 2	type Standard	result 1
		Opponent Nkosi, L (Lindokuhle)				Opponent Calits, J (Jacques)
2	1	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 4	type Standard	result 1	date 2025-05-03	rnd 4	type Standard	result 1
		Opponent Hains, M (Micah)				Opponent Hains, M (Micah)
3	1	Tournament East Rand Chess Club Open 2025				Tournament East Rand Chess Club Open 2025
		date 2025-05-03	rnd 2	type Standard	result 1	date 2025-05-03	rnd 2	type Standard	result 1
		Opponent Chisango, T (Trafford)				Opponent Chisango, T (Trafford)

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	White ,E (Edward)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	White ,E (Edward)	1	1447.9	1022.9	1	1437.5	1022.9	0	0	0	0	0	0
2	Smith ,L (Logan)	1	1	425	1	1	425	0	0	0	0	0	0
2	Smith ,L (Logan)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
3	Sibanda ,T (Tshepang)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Sibanda ,T (Tshepang)	1	1221.9	796.9	1	1225.8	796.9	0	0	0	0	0	0
4	Grootboom ,C (Chante)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Grootboom ,C (Chante)	1	1295.4	870.4	1	1293.3	870.4	0	0	0	0	0	0
5	Hains ,M (Micah)	1	1	425	1	1	425	0	0	0	0	0	0
5	Hains ,M (Micah)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
6	Heydenrych ,G (Guenter)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Heydenrych ,G (Guenter)	1	1231.7	806.7	1	1238.2	806.7	0	0	0	0	0	0
7	Seme ,S (Sinethemba)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Seme ,S (Sinethemba)	1	1143.9	718.9	1	1138.1	718.9	0	0	0	0	0	0
8	Nkosi ,L (Lindokuhle)	1	1	425	1	1	425	0	0	0	0	0	0
8	Nkosi ,L (Lindokuhle)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
9	Calits ,J (Jacques)	1	1	425	1	1	425	0	0	0	0	0	0
9	Calits ,J (Jacques)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
10	Mokoena ,K (Khumo)	1	1	425	1	1	425	0	0	0	0	0	0
10	Mokoena ,K (Khumo)	1	1160.7	1585.7	1	1153.3	1585.7	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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PLAYER PAGE

Personal

Keulder, R (Ruben)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms