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

1099.1

Item	Main	Standard	Rapid	Blitz
Rating	1190.6	1188.8	1200	1200
Raw rating	1157.5	1148.6	1200	1200
Weighted rating	1190.6	1188.8	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	-2.8	-3.4	0	0
New rating	1187.8	1185.4	1200	1200
Analysis
Rating	1190.6	1188.8	1200	1200
Raw rating	1157.5	1148.6	1200	1200
Weighted rating	1190.6	1188.8	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	1187.8	1185.4	1200	1200
New weighted performance	0	0	0	0
Temp new rating	1187.8	1185.4	1200	1200
Temp new rating +/-	-2.8	-3.4	0	0
Final new rating +/-	-2.8	-3.4	0	0
New rating	1187.8	1185.4	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
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
2024-08-01	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	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

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