Chess South Africa Ratings Database

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Personal

Jansen, AI (Alfonso Isaac)

Chess SA id

105088998

FIDE id

Date of birth

2005-04-02 (Adult)

Gender

Male

Region

Overberg (WOS)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-02-24

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1224.1	1182.8	1274	1200
Raw rating	1224.1	1182.8	1274	1200
Weighted rating	1224.1	1182.8	1274	1200
Weighted performance	671	372.2	0	0
Floor	744.8	733.9	774	700
K-factor	36	36	36	36
Min/Max rating change allowed	160.2	169.9	149.2	165.8
Highest rating	1244.8 2019-05-01	1233.9 2019-05-01	1413 2018-06-01	1200 2018-10-01
Highest raw rating	1244.8 2019-05-01	1233.9 2019-05-01	1274 2024-02-01	1200 2024-02-01
Highest weighted rating	1244.8 2025-02-01	1233.9 2018-02-01	1274 2025-02-01	1200 2018-10-01
Highest weighted performance	1222.6 2019-04-01	1218.6 2019-04-01	1413 2018-06-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1224.1	1182.8	1274	1200
Analysis
Rating	1224.1	1182.8	1274	1200
Raw rating	1224.1	1182.8	1274	1200
Weighted rating	1224.1	1182.8	1274
Weighted performance	671	372.2	0
K-factor	36	36	36	36
Floor	744.8	733.9	774	700
Max/Min rating change allowed	160.2	169.9	149.2	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	1224.1	1182.8	1274	1200
New weighted rating	1224.1	1182.8	1274	1200
New weighted performance	662.9	364.4	0	0
Temp new rating	1224.1	1182.8	1274	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1224.1	1182.8	1274	1200
New K-factor	36	36	36	36
New floor	744.8	733.9	774	700

Item	Main	Standard	Rapid
	0	0	0
	0	0	0
	0	0	0
	10	0	10
	5	5	0
	0	0	0
History	100	79	21

Games since
	Main 0	Standard 0		Rapid 0		Blitz 0
Gender	Male
Age group	Adult
Region	Overberg (WOS)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
Adult	-1		-1		-1
Adult 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	83	51.5	62.05	102.4	1108.9	1211.3
Standard	67	39	58.21	69.8	1110.5	1180.3
Rapid	16	12.5	78.12	239.1	1101.9	1340.9
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1224.1	1182.8	1274	1200
2025-11-30	1224.1	1182.8	1274	1200
2025-11-01	1224.1	1182.8	1274	1200
2025-09-30	1224.1	1182.8	1274	1200
2025-09-01	1224.1	1182.8	1274	1200
2025-08-01	1224.1	1182.8	1274	1200
2025-07-01	1224.1	1182.8	1274	1200
2025-06-01	1224.1	1182.8	1274	1200
2025-05-01	1224.1	1182.8	1274	1200
2025-04-01	1224.1	1182.8	1274	1200
2025-03-01	1224.1	1182.8	1274	1200
2025-02-01	1224.1	1182.8	1274	1200
2025-01-01	1224.1	1182.8	1274	1200
2024-12-01	1224.1	1182.8	1274	1200
2024-11-01	1224.1	1182.8	1274	1200
2024-10-01	1224.1	1182.8	1274	1200
2024-09-01	1224.1	1182.8	1274	1200
2024-11-01	1224.1	1182.8	1274	1200
2024-07-01	1224.1	1182.8	1274	1200
2024-06-01	1224.1	1182.8	1274	1200
2024-05-01	1224.1	1182.8	1274	1200
2024-04-01	1224.1	1182.8	1274	1200
2024-03-01	1224.1	1182.8	1274	1200
2024-02-01	1224.1	1182.8	1274	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	Overberg High Schools Trails 2023 (U19)	2023-02-24	2023-02-24	Rapid	Overberg (WOS)	5	5	4	Yes	Analysis
2	Overberg Schools Open Tournament 2023 (U18)	2023-02-11	2023-02-11	Rapid	Overberg (WOS)	5	5	4	Yes	Analysis
3	Overberg 2022 (U18 Boys)	2022-03-05	2022-03-05	Standard	Overberg (WOS)	5	5	2.5	Yes	Analysis
4	2019 Western Cape Club Championship (A+B)	2019-10-25	2019-10-27	Standard	Overberg (WOS)	6	5	0	Yes	Analysis
5	Bontebok 2019 (U16)	2019-08-17	2019-08-17	Standard	Overberg (WOS)	5	5	3	Yes	Analysis
6	Overberg Top Schools 2019 (U15)	2019-07-20	2019-07-20	Standard	Overberg (WOS)	3	2	2	Yes	Analysis
7	Western Cape Schools Individuals 2019 (U15 Boys)	2019-05-04	2019-05-05	Standard	Eden (WEG)	6	6	2	Yes	Analysis
8	Trial 2 Teddy/Toy Tournament 2019 (Open)	2019-04-06	2019-04-06	Standard	Overberg (WOS)	5	5	3	Yes	Analysis
9	Overberg School Chess Close Champs 2019 (U15 Boys)	2019-03-08	2019-03-09	Standard	Overberg (WOS)	6	6	4.5	Yes	Analysis
10	South African Junior Team Championships 2018 (U14D)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	6	Yes	Analysis
11	Caledon Casino 2 2018 (Open)	2018-10-20	2018-10-20	Standard	Overberg (WOS)	5	5	2	Yes	Analysis
12	VRT Pitt Open 2018 (U14)	2018-06-02	2018-06-02	Rapid	Overberg (WOS)	6	6	4.5	Yes	Analysis
13	Overberg 3rd Trial 2018 (U14)	2018-05-26	2018-05-26	Standard	Overberg (WOS)	5	5	4	Yes	Analysis
14	Overberg 2nd Trial 2018 (U14)	2018-05-05	2018-05-05	Standard	Overberg (WOS)	5	5	3	Yes	Analysis
15	Overberg Chess 1st Trial 2018 (A)	2018-04-14	2018-04-14	Standard	Overberg (WOS)	5	5	3	Yes	Analysis
16	Overberg Schools Closed 2018 (U13 Boys)	2018-03-23	2018-03-24	Standard	Overberg (WOS)	6	6	4	Yes	Analysis

#	Games	Start				End
1	9	Tournament South African Junior Team Championships 2018				Tournament Overberg School Chess Close Champs 2019
		date 2018-12-17	rnd 4	type Standard	result 1	date 2019-03-08	rnd 5	type Standard	result 1
		Opponent Hendricks, UO (Uziel)				Opponent Kunz, S (Sebastian)
2	6	Tournament Overberg 3rd Trial 2018				Tournament VRT Pitt Open 2018
		date 2018-05-05	rnd 4	type Standard	result 1	date 2018-06-02	rnd 4	type Rapid	result 0.5
		Opponent Ndavala, J (Jeffline)				Opponent Philander, M (Megquewin)
3	4	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg High Schools Trails 2023
		date 2023-02-11	rnd 4	type Rapid	result 1	date 2023-02-24	rnd 2	type Rapid	result 1
		Opponent Haarhoff, T (Tsoanello)				Opponent Haarhoff, T (Tsoanello)

#	Games	Start				End
1	9	Tournament South African Junior Team Championships 2018				Tournament Overberg School Chess Close Champs 2019
		date 2018-12-17	rnd 4	type Standard	result 1	date 2019-03-08	rnd 5	type Standard	result 1
		Opponent Hendricks, UO (Uziel)				Opponent Kunz, S (Sebastian)
2	4	Tournament Western Cape Schools Individuals 2019				Tournament Bontebok 2019
		date 2019-05-05	rnd 6	type Standard	result 1	date 2019-08-17	rnd 1	type Standard	result 1
		Opponent Shoshola, J (Jesurun)				Opponent Philander, M (Megquewin)
3	4	Tournament Overberg Schools Closed 2018				Tournament Overberg Schools Closed 2018
		date 2018-03-23	rnd 2	type Standard	result 1	date 2018-03-24	rnd 5	type Standard	result 1
		Opponent Du Toit, G (Groban)				Opponent Tyindi, L (Luvuyo)

#	Games	Start				End
1	4	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg High Schools Trails 2023
		date 2023-02-11	rnd 4	type Rapid	result 1	date 2023-02-24	rnd 2	type Rapid	result 1
		Opponent Haarhoff, T (Tsoanello)				Opponent Haarhoff, T (Tsoanello)
2	4	Tournament VRT Pitt Open 2018				Tournament VRT Pitt Open 2018
		date 2018-06-02	rnd 1	type Rapid	result 1	date 2018-06-02	rnd 4	type Rapid	result 0.5
		Opponent Hopp, C (Chelnecea)				Opponent Philander, M (Megquewin)
3	3	Tournament VRT Pitt Open 2018				Tournament Overberg Schools Open Tournament 2023
		date 2018-06-02	rnd 6	type Rapid	result 1	date 2023-02-11	rnd 2	type Rapid	result 1
		Opponent De Wie, S (Stefan)				Opponent Louw, A (Adriaan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament South African Junior Team Championships 2018				Tournament Overberg School Chess Close Champs 2019
		date 2018-12-17	rnd 4	type Standard	result 1	date 2019-03-08	rnd 2	type Standard	result 1
		Opponent Hendricks, UO (Uziel)				Opponent Van Zyl, J (Jeandre)
2	5	Tournament Overberg 3rd Trial 2018				Tournament VRT Pitt Open 2018
		date 2018-05-05	rnd 4	type Standard	result 1	date 2018-06-02	rnd 3	type Rapid	result 1
		Opponent Ndavala, J (Jeffline)				Opponent Ndavala, J (Jeffline)
3	4	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg High Schools Trails 2023
		date 2023-02-11	rnd 4	type Rapid	result 1	date 2023-02-24	rnd 2	type Rapid	result 1
		Opponent Haarhoff, T (Tsoanello)				Opponent Haarhoff, T (Tsoanello)

#	Games	Start				End
1	6	Tournament South African Junior Team Championships 2018				Tournament Overberg School Chess Close Champs 2019
		date 2018-12-17	rnd 4	type Standard	result 1	date 2019-03-08	rnd 2	type Standard	result 1
		Opponent Hendricks, UO (Uziel)				Opponent Van Zyl, J (Jeandre)
2	4	Tournament Western Cape Schools Individuals 2019				Tournament Bontebok 2019
		date 2019-05-05	rnd 6	type Standard	result 1	date 2019-08-17	rnd 1	type Standard	result 1
		Opponent Shoshola, J (Jesurun)				Opponent Philander, M (Megquewin)
3	4	Tournament Overberg Schools Closed 2018				Tournament Overberg Schools Closed 2018
		date 2018-03-23	rnd 2	type Standard	result 1	date 2018-03-24	rnd 5	type Standard	result 1
		Opponent Du Toit, G (Groban)				Opponent Tyindi, L (Luvuyo)

#	Games	Start				End
1	4	Tournament Overberg Schools Open Tournament 2023				Tournament Overberg High Schools Trails 2023
		date 2023-02-11	rnd 4	type Rapid	result 1	date 2023-02-24	rnd 2	type Rapid	result 1
		Opponent Haarhoff, T (Tsoanello)				Opponent Haarhoff, T (Tsoanello)
2	3	Tournament VRT Pitt Open 2018				Tournament Overberg Schools Open Tournament 2023
		date 2018-06-02	rnd 6	type Rapid	result 1	date 2023-02-11	rnd 2	type Rapid	result 1
		Opponent De Wie, S (Stefan)				Opponent Louw, A (Adriaan)
3	3	Tournament VRT Pitt Open 2018				Tournament VRT Pitt Open 2018
		date 2018-06-02	rnd 1	type Rapid	result 1	date 2018-06-02	rnd 3	type Rapid	result 1
		Opponent Hopp, C (Chelnecea)				Opponent Ndavala, J (Jeffline)

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	Edwards ,B (Brandon)	4	0	-425	4	0	-425	0	0	0	0	0	0
1	Edwards ,B (Brandon)	4	992.8	567.8	4	1003	567.8	0	0	0	0	0	0
2	Tyindi ,L (Luvuyo)	3	1.5	0	3	1.5	0	0	0	0	0	0	0
2	Tyindi ,L (Luvuyo)	3	1009.8	1009.8	3	986.8	1009.8	0	0	0	0	0	0
3	Adams ,J (Juvelian)	3	3	425	2	2	425	1	1	425	0	0	0
3	Adams ,J (Juvelian)	3	637.4	1062.4	2	558.2	1062.4	1	702	1062.4	0	0	0
4	Ndavala ,J (Jeffline)	3	2	141.7	2	1	0	1	1	425	0	0	0
4	Ndavala ,J (Jeffline)	3	1116.6	1258.3	2	1095.6	1116.6	1	1200	1541.6	0	0	0
5	Van Zyl ,J (Jeandre)	2	1	0	2	1	0	0	0	0	0	0	0
5	Van Zyl ,J (Jeandre)	2	1121.2	1121.2	2	1110.8	1121.2	0	0	0	0	0	0
6	Kleinhans ,T (Theo)	2	0	-425	2	0	-425	0	0	0	0	0	0
6	Kleinhans ,T (Theo)	2	1450.3	1025.3	2	1433.7	1025.3	0	0	0	0	0	0
7	Kunz ,S (Sebastian)	2	2	425	2	2	425	0	0	0	0	0	0
7	Kunz ,S (Sebastian)	2	941.9	1366.9	2	974.4	1366.9	0	0	0	0	0	0
8	Crookes ,J (Jonas)	2	0	-425	1	0	-425	1	0	-425	0	0	0
8	Crookes ,J (Jonas)	2	1355.8	930.8	1	1248.2	930.8	1	1271.6	930.8	0	0	0
9	Philander ,M (Megquewin)	2	1.5	212.5	1	1	425	1	0.5	0	0	0	0
9	Philander ,M (Megquewin)	2	1174.6	1387.1	1	1183.6	1599.6	1	1200	1174.6	0	0	0
10	Hopp ,C (Chelnecea)	2	2	425	1	1	425	1	1	425	0	0	0
10	Hopp ,C (Chelnecea)	2	1133.1	1558.1	1	1164.8	1558.1	1	1200	1558.1	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Jansen, AI (Alfonso Isaac)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms