Chess South Africa Ratings Database

PLAYER PAGE

Personal

Davis, JJ (Jan Johannes)

Chess SA id

109083247

FIDE id

Date of birth

2009-04-21 (U18)

Gender

Male

Region

Bojanala Platina (NBR)

Citizen

RSA

Titles

Chess SA registered

Last active game

2019-05-18

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1047.7	1009.1	676.4	541.2
Raw rating	1047.7	1009.1	676.4	541.2
Weighted rating	1047.7	1009.1	676.4	541.2
Weighted performance	194.7	178.4	0	0
Floor	547.7	509.1	500	500
K-factor	40	40	40	40
Min/Max rating change allowed	206	217.6	349.6	423.9
Highest rating	1200 2024-11-01	1200 2024-11-01	1200 2018-02-01	1200 2024-02-01
Highest raw rating	1047.7 2024-02-01	1009.1 2024-02-01	676.4 2024-02-01	541.2 2024-02-01
Highest weighted rating	1047.7 2024-11-01	1009.1 2024-11-01	676.4 2024-11-01	541.2 2024-11-01
Highest weighted performance	1200 2024-12-01	1200 2024-12-01	1200 2018-02-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1047.7	1009.1	676.4	541.2
Analysis
Rating	1047.7	1009.1	676.4	541.2
Raw rating	1047.7	1009.1	676.4	541.2
Weighted rating	1047.7	1009.1	676.4
Weighted performance	194.7	178.4	0
K-factor	40	40	40	40
Floor	547.7	509.1	500	500
Max/Min rating change allowed	206	217.6	349.6	423.9
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	1047.7	1009.1	676.4	541.2
New weighted rating	1047.7	1009.1	676.4	541.2
New weighted performance	188.4	172.4	0	0
Temp new rating	1047.7	1009.1	676.4	541.2
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1047.7	1009.1	676.4	541.2
New K-factor	40	40	40	40
New floor	547.7	509.1	500	500

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
	0	0	0
History	137	117	20

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	U18
Region	Bojanala Platina (NBR)
Province	Northwest (NW)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U18	-1		-1		-1
U18 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	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
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	72	40	55.56	47.2	940.5	987.7
Standard	62	35	56.45	54.8	915.1	969.9
Rapid	10	5	50	0	1097.8	1097.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1047.7	1009.1	676.4	541.2
2025-09-30	1047.7	1009.1	676.4	541.2
2025-09-01	1047.7	1009.1	676.4	541.2
2025-08-01	1047.7	1009.1	676.4	541.2
2025-07-01	1047.7	1009.1	676.4	541.2
2025-06-01	1047.7	1009.1	676.4	541.2
2025-05-01	1047.7	1009.1	676.4	541.2
2025-04-01	1047.7	1009.1	676.4	541.2
2025-03-01	1047.7	1009.1	676.4	541.2
2025-02-01	1047.7	1009.1	676.4	541.2
2025-01-01	1047.7	1009.1	676.4	541.2
2024-12-01	1047.7	1009.1	676.4	541.2
2024-11-01	1047.7	1009.1	676.4	541.2
2024-10-01	1047.7	1009.1	676.4	541.2
2024-09-01	1047.7	1009.1	676.4	541.2
2024-08-01	1047.7	1009.1	676.4	541.2
2024-07-01	1047.7	1009.1	676.4	541.2
2024-09-01	1047.7	1009.1	676.4	541.2
2024-05-01	1047.7	1009.1	676.4	541.2
2024-04-01	1047.7	1009.1	676.4	541.2
2024-03-01	1047.7	1009.1	676.4	541.2
2024-02-01	1047.7	1009.1	676.4	541.2
2024-01-01	1047.7	1009.1	676.4	541.2
2023-12-01	1047.7	1009.1	676.4	541.2

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	2019 Super 12 Laerskole (Juniors)	2019-05-04	2019-05-04	Rapid	Tshwane (GTP)	5	5	2	Yes	Analysis
2	Laerskool Proteapark 2019 (C)	2019-05-18	2019-05-18	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
3	Rustenburg Noord Primary Tournament 2019 (U12)	2019-02-09	2019-02-09	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
4	Laerskool Vastrap Tournament 2019 (C)	2019-02-23	2019-02-23	Standard	Bojanala Platina (NBR)	5	5	2	Yes	Analysis
5	Fields College Open 2019 (U12)	2019-02-02	2019-02-02	Standard	Bojanala Platina (NBR)	5	5	1.5	Yes	Analysis
6	South African Junior Team Championships 2018 (U10A)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	2.5	Yes	Analysis
7	Lebone II Chess 2018 (U10)	2018-09-01	2018-09-01	Standard	Cape Town (WCT)	5	5	3	Yes	Analysis
8	Bojanala Regionals 2018 (U10)	2018-09-15	2018-09-15	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
9	Laerskool Brits Tournament 2018 (U10)	2018-08-04	2018-08-04	Standard	Bojanala Platina (NBR)	5	5	3.5	Yes	Analysis
10	2018 Super 12 (Junior)	2018-05-05	2018-05-05	Rapid	Tshwane (GTP)	5	5	3	Yes	Analysis
11	Laerskool Proteapark Chess 2018 (C)	2018-05-19	2018-05-19	Standard	Bojanala Platina (NBR)	5	5	1.5	Yes	Analysis
12	Laerskool Rustenburg 2018 (D)	2018-03-24	2018-03-24	Standard	Bojanala Platina (NBR)	5	5	4	Yes	Analysis
13	Laerskool Vastrap 2018 (U10)	2018-02-03	2018-02-03	Standard	Bojanala Platina (NBR)	5	5	3.5	Yes	Analysis
14	Laerskool Rustenburg Noord Primary 2018 (D)	2018-02-24	2018-02-24	Standard	Bojanala Platina (NBR)	5	5	3.5	Yes	Analysis

#	Games	Start				End
1	7	Tournament Laerskool Vastrap 2018				Tournament Laerskool Rustenburg Noord Primary 2018
		date 2018-02-03	rnd 3	type Standard	result 1	date 2018-02-24	rnd 4	type Standard	result 1
		Opponent Marx, HB (Heinrich)				Opponent Letupu, L (Lemogang)
2	4	Tournament Laerskool Proteapark 2019				Tournament Laerskool Proteapark 2019
		date 2019-05-18	rnd 2	type Standard	result 1	date 2019-05-18	rnd 5	type Standard	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Redelinghuys, A (Alexander)
3	4	Tournament Laerskool Vastrap Tournament 2019				Tournament 2019 Super 12 Laerskole
		date 2019-02-23	rnd 4	type Standard	result 1	date 2019-05-04	rnd 2	type Rapid	result 1
		Opponent Britz, JD (Jakobus)				Opponent Morkel, DJ (Douglas)

#	Games	Start				End
1	7	Tournament Laerskool Vastrap 2018				Tournament Laerskool Rustenburg Noord Primary 2018
		date 2018-02-03	rnd 3	type Standard	result 1	date 2018-02-24	rnd 4	type Standard	result 1
		Opponent Marx, HB (Heinrich)				Opponent Letupu, L (Lemogang)
2	4	Tournament Laerskool Proteapark 2019				Tournament Laerskool Proteapark 2019
		date 2019-05-18	rnd 2	type Standard	result 1	date 2019-05-18	rnd 5	type Standard	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Redelinghuys, A (Alexander)
3	3	Tournament Bojanala Regionals 2018				Tournament Bojanala Regionals 2018
		date 2018-09-15	rnd 3	type Standard	result 1	date 2018-09-15	rnd 5	type Standard	result 1
		Opponent Fourie, M (Marli)				Opponent Kleynhans, EH (Eldrich)

#	Games	Start				End
1	3	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 2	type Rapid	result 1	date 2018-05-05	rnd 4	type Rapid	result 1
		Opponent Retief, WJ (Willem)				Opponent Human, W (Wp)
2	2	Tournament 2019 Super 12 Laerskole				Tournament 2019 Super 12 Laerskole
		date 2019-05-04	rnd 1	type Rapid	result 1	date 2019-05-04	rnd 2	type Rapid	result 1
		Opponent Nieman, A (Armand)				Opponent Morkel, DJ (Douglas)

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Laerskool Proteapark 2019				Tournament Laerskool Proteapark 2019
		date 2019-05-18	rnd 2	type Standard	result 1	date 2019-05-18	rnd 5	type Standard	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Redelinghuys, A (Alexander)
2	4	Tournament Laerskool Vastrap Tournament 2019				Tournament 2019 Super 12 Laerskole
		date 2019-02-23	rnd 4	type Standard	result 1	date 2019-05-04	rnd 2	type Rapid	result 1
		Opponent Britz, JD (Jakobus)				Opponent Morkel, DJ (Douglas)
3	3	Tournament Bojanala Regionals 2018				Tournament Bojanala Regionals 2018
		date 2018-09-15	rnd 3	type Standard	result 1	date 2018-09-15	rnd 5	type Standard	result 1
		Opponent Fourie, M (Marli)				Opponent Kleynhans, EH (Eldrich)

#	Games	Start				End
1	4	Tournament Laerskool Proteapark 2019				Tournament Laerskool Proteapark 2019
		date 2019-05-18	rnd 2	type Standard	result 1	date 2019-05-18	rnd 5	type Standard	result 1
		Opponent Jansen Van Vuuren, L (Lourein)				Opponent Redelinghuys, A (Alexander)
2	3	Tournament Bojanala Regionals 2018				Tournament Bojanala Regionals 2018
		date 2018-09-15	rnd 3	type Standard	result 1	date 2018-09-15	rnd 5	type Standard	result 1
		Opponent Fourie, M (Marli)				Opponent Kleynhans, EH (Eldrich)
3	2	Tournament Laerskool Vastrap Tournament 2019				Tournament Laerskool Vastrap Tournament 2019
		date 2019-02-23	rnd 4	type Standard	result 1	date 2019-02-23	rnd 5	type Standard	result 1
		Opponent Britz, JD (Jakobus)				Opponent Makwakwa, T (Tshedimogo)

#	Games	Start				End
1	3	Tournament 2018 Super 12				Tournament 2018 Super 12
		date 2018-05-05	rnd 2	type Rapid	result 1	date 2018-05-05	rnd 4	type Rapid	result 1
		Opponent Retief, WJ (Willem)				Opponent Human, W (Wp)
2	2	Tournament 2019 Super 12 Laerskole				Tournament 2019 Super 12 Laerskole
		date 2019-05-04	rnd 1	type Rapid	result 1	date 2019-05-04	rnd 2	type Rapid	result 1
		Opponent Nieman, A (Armand)				Opponent Morkel, DJ (Douglas)

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	Letupu ,L (Lemogang)	4	1	-212.5	4	1	-212.5	0	0	0	0	0	0
1	Letupu ,L (Lemogang)	4	889.7	677.2	4	880.8	677.2	0	0	0	0	0	0
2	Van Staden ,J (Jakobus)	3	3	425	3	3	425	0	0	0	0	0	0
2	Van Staden ,J (Jakobus)	3	931.2	1356.2	3	909.9	1356.2	0	0	0	0	0	0
3	Wolmarans ,CH (Cornelius Hendrik)	3	0.5	-283.3	3	0.5	-283.3	0	0	0	0	0	0
3	Wolmarans ,CH (Cornelius Hendrik)	3	726.2	442.9	3	729.3	442.9	0	0	0	0	0	0
4	Wilson ,CJ (Cj)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
4	Wilson ,CJ (Cj)	2	748	960.5	2	748	960.5	0	0	0	0	0	0
5	Marx ,HB (Heinrich Butow)	2	2	425	2	2	425	0	0	0	0	0	0
5	Marx ,HB (Heinrich Butow)	2	661	1086	2	661	1086	0	0	0	0	0	0
6	Venter ,S (Sune)	2	2	425	2	2	425	0	0	0	0	0	0
6	Venter ,S (Sune)	2	704.3	1129.3	2	639	1129.3	0	0	0	0	0	0
7	Redelinghuys ,A (Alexander)	2	2	425	2	2	425	0	0	0	0	0	0
7	Redelinghuys ,A (Alexander)	2	1087.6	1512.6	2	1079.3	1512.6	0	0	0	0	0	0
8	Molefinyane ,O (Otlotleng)	2	1	0	2	1	0	0	0	0	0	0	0
8	Molefinyane ,O (Otlotleng)	2	737.2	737.2	2	727.8	737.2	0	0	0	0	0	0
9	Molobye ,T (Tlotlang)	2	1.5	212.5	2	1.5	212.5	0	0	0	0	0	0
9	Molobye ,T (Tlotlang)	2	687.7	900.2	2	666.4	900.2	0	0	0	0	0	0
10	Kleynhans ,EH (Eldrich Henrico)	2	1	0	2	1	0	0	0	0	0	0	0
10	Kleynhans ,EH (Eldrich Henrico)	2	899.1	899.1	2	822.2	899.1	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

Davis, JJ (Jan Johannes)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms