Chess South Africa Ratings Database

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Personal

Kalpens, B (Bonga)

Chess SA id

1060302967

FIDE id

Date of birth

2006-05-11 (U20)

Gender

Male

Region

Overberg (WOS)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-04-12

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1255.6	1199.2	1286.8	1200
Raw rating	1255.6	1199.2	1286.8	1200
Weighted rating	1233.9	1197.7	1249.3	1200
Weighted performance	0	0	0	0
Floor	755.6	700	786.8	700
K-factor	36	36	36	36
Min/Max rating change allowed	153.2	166	146.5	165.8
Highest rating	1298.7 2024-04-01	1226.9 2024-09-01	1305.6 2024-04-01	1200 2024-05-01
Highest raw rating	1255.6 2025-05-05	1200 2024-05-01	1286.8 2025-05-05	1200 2024-05-01
Highest weighted rating	1255.6 2024-07-01	1200 2024-05-01	1239.9 2025-08-01	1200 2024-05-01
Highest weighted performance	1298.7 2024-04-01	1226.9 2024-09-01	1305.6 2024-04-01	1200 2024-05-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1255.6	1199.2	1286.8	1200
Analysis
Rating	1255.6	1199.2	1286.8	1200
Raw rating	1255.6	1199.2	1286.8	1200
Weighted rating	1233.9	1197.7	1249.3
Weighted performance	0	0	0
K-factor	36	36	36	36
Floor	755.6	700	786.8	700
Max/Min rating change allowed	153.2	166	146.5	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	1255.6	1199.2	1286.8	1200
New weighted rating	1236.4	1197.9	1253.6	1200
New weighted performance	0	0	0	0
Temp new rating	1255.6	1199.2	1286.8	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1255.6	1199.2	1286.8	1200
New K-factor	36	36	36	36
New floor	755.6	700	786.8	700

Item	Main	Standard	Rapid
	0	0	0
	7	0	7
	15	10	5
	0	0	0
	0	0	0
	0	0	0
History	22	10	12

Games since
	Main 22	Standard 10		Rapid 12		Blitz 0
Gender	Male
Age group	U20
Region	Overberg (WOS)
Province	Western Cape (WC)
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	7	5	71.43	182.1	1252.5	1434.6
Standard	0	0	0	0	0	0
Rapid	7	5	71.43	182.1	1252.5	1434.6
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	22	11	50	0	1325.8	1325.8
Standard	10	3	30	-170	1405.1	1235.1
Rapid	12	8	66.67	141.7	1259.8	1401.4
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1255.6	1199.2	1286.8	1200
2025-09-01	1255.6	1199.2	1286.8	1200
2025-08-01	1255.6	1199.2	1286.8	1200
2025-07-01	1255.6	1199.2	1286.8	1200
2025-06-01	1255.6	1199.2	1286.8	1200
2025-05-01	1255.6	1199.2	1286.8	1200
2025-04-01	1222.2	1199.2	1224	1200
2025-03-01	1222.2	1199.2	1224	1200
2025-02-01	1222.2	1199.2	1224	1200
2025-01-01	1222.2	1199.2	1224	1200
2024-12-01	1222.2	1199.2	1224	1200
2024-11-01	1222.2	1199.2	1224	1200
2024-10-01	1222.2	1199.2	1224	1200
2024-09-01	1205.8	1176.4	1224	1200
2024-08-01	1205.8	1176.4	1224	1200
2024-07-01	1222.8	1200	1224	1200
2024-06-01	1222.8	1200	1224	1200
2024-08-01	1222.8	1200	1224	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
2023-11-01	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	Hermanus Chess Club Open 2025 (Development)	2025-04-12	2025-04-12	Rapid	Overberg (WOS)	7	7	5	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Hermanus Chess Club Open 2025 (Development)	2025-04-12	2025-04-12	Rapid	Overberg (WOS)	7	7	5	Yes	Analysis
2	Western Cape Top Schools Championship 2024 (U18 Mixed)	2024-08-30	2024-09-01	Standard	Eden (WEG)	6	6	2	Yes	Analysis
3	Overberg Schools - Top Schools 2024 (U18 Mixed)	2024-07-27	2024-07-27	Standard	Overberg (WOS)	5	4	1	Yes	Analysis
4	Curro Hermanus Freedom Day Rapid 2024 (U19)	2024-04-27	2024-04-27	Rapid	Overberg (WOS)	5	5	3	Yes	Analysis

#	Games	Start				End
1	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 6	type Rapid	result 1	date 2025-04-12	rnd 7	type Rapid	result 1
		Opponent Bezuidenhout, M (Millekyle)				Opponent Ntsikwa, J (Junior)
2	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 1	type Rapid	result 1	date 2025-04-12	rnd 2	type Rapid	result 1
		Opponent Smit, M (Mario)				Opponent Da Fonseca, M (Matthew)
3	2	Tournament Western Cape Top Schools Championship 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-08-30	rnd 2	type Standard	result 1	date 2024-08-30	rnd 3	type Standard	result 1
		Opponent Davids, M (Michael)				Opponent Hendricks, G (Guevante)

#	Games	Start				End
1	2	Tournament Western Cape Top Schools Championship 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-08-30	rnd 2	type Standard	result 1	date 2024-08-30	rnd 3	type Standard	result 1
		Opponent Davids, M (Michael)				Opponent Hendricks, G (Guevante)
2	1	Tournament Overberg Schools - Top Schools 2024				Tournament Overberg Schools - Top Schools 2024
		date 2024-07-27	rnd 1	type Standard	result 1	date 2024-07-27	rnd 1	type Standard	result 1
		Opponent Brand, F (Francois)				Opponent Brand, F (Francois)

#	Games	Start				End
1	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 6	type Rapid	result 1	date 2025-04-12	rnd 7	type Rapid	result 1
		Opponent Bezuidenhout, M (Millekyle)				Opponent Ntsikwa, J (Junior)
2	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 1	type Rapid	result 1	date 2025-04-12	rnd 2	type Rapid	result 1
		Opponent Smit, M (Mario)				Opponent Da Fonseca, M (Matthew)
3	2	Tournament Curro Hermanus Freedom Day Rapid 2024				Tournament Curro Hermanus Freedom Day Rapid 2024
		date 2024-04-27	rnd 3	type Rapid	result 1	date 2024-04-27	rnd 4	type Rapid	result 1
		Opponent Olivier, J (Jonathan)				Opponent Cloete, L (Lynne)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 6	type Rapid	result 1	date 2025-04-12	rnd 7	type Rapid	result 1
		Opponent Bezuidenhout, M (Millekyle)				Opponent Ntsikwa, J (Junior)
2	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 1	type Rapid	result 1	date 2025-04-12	rnd 2	type Rapid	result 1
		Opponent Smit, M (Mario)				Opponent Da Fonseca, M (Matthew)
3	2	Tournament Western Cape Top Schools Championship 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-08-30	rnd 2	type Standard	result 1	date 2024-08-30	rnd 3	type Standard	result 1
		Opponent Davids, M (Michael)				Opponent Hendricks, G (Guevante)

#	Games	Start				End
1	2	Tournament Western Cape Top Schools Championship 2024				Tournament Western Cape Top Schools Championship 2024
		date 2024-08-30	rnd 2	type Standard	result 1	date 2024-08-30	rnd 3	type Standard	result 1
		Opponent Davids, M (Michael)				Opponent Hendricks, G (Guevante)
2	1	Tournament Overberg Schools - Top Schools 2024				Tournament Overberg Schools - Top Schools 2024
		date 2024-07-27	rnd 1	type Standard	result 1	date 2024-07-27	rnd 1	type Standard	result 1
		Opponent Brand, F (Francois)				Opponent Brand, F (Francois)

#	Games	Start				End
1	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 6	type Rapid	result 1	date 2025-04-12	rnd 7	type Rapid	result 1
		Opponent Bezuidenhout, M (Millekyle)				Opponent Ntsikwa, J (Junior)
2	2	Tournament Hermanus Chess Club Open 2025				Tournament Hermanus Chess Club Open 2025
		date 2025-04-12	rnd 1	type Rapid	result 1	date 2025-04-12	rnd 2	type Rapid	result 1
		Opponent Smit, M (Mario)				Opponent Da Fonseca, M (Matthew)
3	2	Tournament Curro Hermanus Freedom Day Rapid 2024				Tournament Curro Hermanus Freedom Day Rapid 2024
		date 2024-04-27	rnd 3	type Rapid	result 1	date 2024-04-27	rnd 4	type Rapid	result 1
		Opponent Olivier, J (Jonathan)				Opponent Cloete, L (Lynne)

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	Olivier ,J (Jonathan)	2	1	0	1	0	-425	1	1	425	0	0	0
1	Olivier ,J (Jonathan)	2	1206.7	1206.7	1	1200	781.7	1	1217.3	1631.7	0	0	0
2	Claassen ,R (Raynier)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Claassen ,R (Raynier)	1	1904.5	1479.5	1	1903.3	1479.5	0	0	0	0	0	0
3	Samuels ,Z (Zeldo)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Samuels ,Z (Zeldo)	1	1166.1	741.1	1	1085.6	741.1	0	0	0	0	0	0
4	Hendricks ,G (Guevante)	1	1	425	1	1	425	0	0	0	0	0	0
4	Hendricks ,G (Guevante)	1	1287.9	1712.9	1	1205.5	1712.9	0	0	0	0	0	0
5	Brand ,F (Francois)	1	1	425	1	1	425	0	0	0	0	0	0
5	Brand ,F (Francois)	1	1203.5	1628.5	1	1200	1628.5	0	0	0	0	0	0
6	Harmse ,D (Deon)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Harmse ,D (Deon)	1	1614.2	1189.2	1	1625.9	1189.2	0	0	0	0	0	0
7	De Wit ,M (Marnus)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	De Wit ,M (Marnus)	1	1499.6	1074.6	1	1477.9	1074.6	0	0	0	0	0	0
8	Rosenberg ,W (Wagheed)	1	0	-425	1	0	-425	0	0	0	0	0	0
8	Rosenberg ,W (Wagheed)	1	1562.7	1137.7	1	1549.2	1137.7	0	0	0	0	0	0
9	Davids ,M (Michael)	1	1	425	1	1	425	0	0	0	0	0	0
9	Davids ,M (Michael)	1	1195	1620	1	1190.8	1620	0	0	0	0	0	0
10	Strydom ,R (Retha)	1	0	-425	0	0	0	1	0	-425	0	0	0
10	Strydom ,R (Retha)	1	1267.3	842.3	0	0	0	1	1334.6	842.3	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Kalpens, B (Bonga)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms