Chess South Africa Ratings Database

PLAYER PAGE

Personal

Kajiwa, I (Irvin)

Chess SA id

1130149897

FIDE id

Date of birth

2013-01-28 (U14)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-08-16

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1329.2	1350.2	1200	1200
Raw rating	1327.2	1341.4	1200	1200
Weighted rating	1329.2	1350.2	1200	1200
Weighted performance	1239	1241	0	0
Floor	855.9	881.7	700	700
K-factor	36	36	36	36
Min/Max rating change allowed	138.3	135.6	165.8	165.8
Highest rating	1355.9 2025-04-01	1381.7 2025-04-01	1200 2018-10-01	1200 2018-10-01
Highest raw rating	1355.9 2025-04-01	1381.7 2025-04-01	1200 2024-03-01	1200 2024-03-01
Highest weighted rating	1327.9 2025-09-01	1349.2 2025-09-01	1200 2018-10-01	1200 2018-10-01
Highest weighted performance	1321.9 2023-03-01	1322.5 2023-03-01	1200 2024-03-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	1.1	0.7	0	0
New rating	1330.3	1350.9	1200	1200
Analysis
Rating	1329.2	1350.2	1200	1200
Raw rating	1327.2	1341.4	1200	1200
Weighted rating	1329.2	1350.2	1200
Weighted performance	1239	1241	0
K-factor	36	36	36	36
Floor	855.9	881.7	700	700
Max/Min rating change allowed	138.3	135.6	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	1327.2	1341.4	1200	1200
New weighted rating	1330.3	1350.9	1200	1200
New weighted performance	1238.6	1240.5	0	0
Temp new rating	1330.3	1350.9	1200	1200
Temp new rating +/-	1.1	0.7	0	0
Final new rating +/-	1.1	0.7	0	0
New rating	1330.3	1350.9	1200	1200
New K-factor	36	36	36	36
New floor	855.9	881.7	700	700

Item	Main	Standard
	0	0
	8	8
	10	10
	14	14
	0	0
	0	0
History	32	32

Games since
	Main 18	Standard 18		Rapid 0		Blitz 0
Gender	Male
Age group	U14
Region	Eden (WEG)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U14	-1		-1		-1
U14 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	8	4	50	0	1341.9	1341.9
Standard	8	4	50	0	1341.9	1341.9
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	32	19	59.38	79.7	1304	1383.7
Standard	32	19	59.38	79.7	1304	1383.7
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-09-30	1327.2	1341.4	1200	1200
2025-09-01	1327.2	1341.4	1200	1200
2025-08-01	1355.9	1381.7	1200	1200
2025-07-01	1355.9	1381.7	1200	1200
2025-06-01	1355.9	1381.7	1200	1200
2025-05-01	1355.9	1381.7	1200	1200
2025-04-01	1355.9	1381.7	1200	1200
2025-03-01	1327.1	1349.1	1200	1200
2025-02-01	1327.1	1349.1	1200	1200
2025-01-01	1327.1	1349.1	1200	1200
2024-12-01	1327.1	1349.1	1200	1200
2024-11-01	1327.1	1349.1	1200	1200
2024-10-01	1327.1	1349.1	1200	1200
2024-09-01	1327.1	1349.1	1200	1200
2024-08-01	1293	1310.9	1200	1200
2024-07-01	1293	1310.9	1200	1200
2024-06-01	1293	1310.9	1200	1200
2024-08-01	1293	1310.9	1200	1200
2024-04-01	1293	1310.9	1200	1200
2024-03-01	1267	1278.9	1200	1200
2024-02-01	1267	1278.9	1200	1200
2024-01-01	1267	1278.9	1200	1200
2023-12-01	1267	1278.9	1200	1200
2023-11-01	1267	1278.9	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	Eden Top Schools 2025 (U13)	2025-08-16	2025-08-16	Standard	Eden (WEG)	5	4	1	Yes	Analysis
2	Eden Schools Chess Trials 1 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	4	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	Eden Top Schools 2025 (U13)	2025-08-16	2025-08-16	Standard	Eden (WEG)	5	4	1	Yes	Analysis
2	Eden Schools Chess Trials 1 2025 (U13 Boys)	2025-03-08	2025-03-08	Standard	Eden (WEG)	5	4	3	Yes	Analysis
3	Eden Top Schools 2024 (U11 Open)	2024-08-17	2024-08-17	Standard	Eden (WEG)	5	5	3	Yes	Analysis
4	Eden School Chess Trials 1 2024 (U11 Boys)	2024-03-09	2024-03-09	Standard	Eden (WEG)	5	5	3	Yes	Analysis
5	Eden Top Schools 2023 (U11 Mix)	2023-08-19	2023-08-19	Standard	Eden (WEG)	5	4	3	Yes	Analysis
6	Eden Trials 2+3 2023 (U12)	2023-04-15	2023-05-13	Standard	Eden (WEG)	10	0	0	No	Analysis
7	Eden Trails 1 2023 (U11 Boys)	2023-03-11	2023-03-11	Standard	Eden (WEG)	5	5	3	Yes	Analysis
8	2023 Knysna School Trials #1 (U7-U11)	2023-02-04	2023-02-04	Standard	Eden (WEG)	5	5	3	Yes	Analysis

#	Games	Start				End
1	4	Tournament Eden Top Schools 2024				Tournament Eden Schools Chess Trials 1 2025
		date 2024-08-17	rnd 5	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Linde, J (Jurgen)				Opponent Postelnicu, S (Stephan)
2	4	Tournament Eden Top Schools 2023				Tournament Eden School Chess Trials 1 2024
		date 2023-08-19	rnd 3	type Standard	result 1	date 2024-03-09	rnd 1	type Standard	result 1
		Opponent Bam, C (Cayleb)				Opponent Bruinders, N (Nate)
3	3	Tournament 2023 Knysna School Trials #1				Tournament Eden Trails 1 2023
		date 2023-02-04	rnd 4	type Standard	result 1	date 2023-03-11	rnd 1	type Standard	result 1
		Opponent Bothma, S (Skye)				Opponent Madziwa, K (Kupakwashe)

#	Games	Start				End
1	4	Tournament Eden Top Schools 2024				Tournament Eden Schools Chess Trials 1 2025
		date 2024-08-17	rnd 5	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Linde, J (Jurgen)				Opponent Postelnicu, S (Stephan)
2	4	Tournament Eden Top Schools 2023				Tournament Eden School Chess Trials 1 2024
		date 2023-08-19	rnd 3	type Standard	result 1	date 2024-03-09	rnd 1	type Standard	result 1
		Opponent Bam, C (Cayleb)				Opponent Bruinders, N (Nate)
3	3	Tournament 2023 Knysna School Trials #1				Tournament Eden Trails 1 2023
		date 2023-02-04	rnd 4	type Standard	result 1	date 2023-03-11	rnd 1	type Standard	result 1
		Opponent Bothma, S (Skye)				Opponent Madziwa, K (Kupakwashe)

No games found.

#	Games	Start				End

No games found.

#	Games	Start				End

#	Games	Start				End
1	4	Tournament Eden Top Schools 2024				Tournament Eden Schools Chess Trials 1 2025
		date 2024-08-17	rnd 5	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Linde, J (Jurgen)				Opponent Postelnicu, S (Stephan)
2	4	Tournament Eden Top Schools 2023				Tournament Eden School Chess Trials 1 2024
		date 2023-08-19	rnd 3	type Standard	result 1	date 2024-03-09	rnd 1	type Standard	result 1
		Opponent Bam, C (Cayleb)				Opponent Bruinders, N (Nate)
3	3	Tournament 2023 Knysna School Trials #1				Tournament Eden Trails 1 2023
		date 2023-02-04	rnd 4	type Standard	result 1	date 2023-03-11	rnd 1	type Standard	result 1
		Opponent Bothma, S (Skye)				Opponent Madziwa, K (Kupakwashe)

#	Games	Start				End
1	4	Tournament Eden Top Schools 2024				Tournament Eden Schools Chess Trials 1 2025
		date 2024-08-17	rnd 5	type Standard	result 1	date 2025-03-08	rnd 4	type Standard	result 1
		Opponent Linde, J (Jurgen)				Opponent Postelnicu, S (Stephan)
2	4	Tournament Eden Top Schools 2023				Tournament Eden School Chess Trials 1 2024
		date 2023-08-19	rnd 3	type Standard	result 1	date 2024-03-09	rnd 1	type Standard	result 1
		Opponent Bam, C (Cayleb)				Opponent Bruinders, N (Nate)
3	3	Tournament 2023 Knysna School Trials #1				Tournament Eden Trails 1 2023
		date 2023-02-04	rnd 4	type Standard	result 1	date 2023-03-11	rnd 1	type Standard	result 1
		Opponent Bothma, S (Skye)				Opponent Madziwa, K (Kupakwashe)

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	Marner ,B (Bryan Neil)	2	0	-425	2	0	-425	0	0	0	0	0	0
1	Marner ,B (Bryan Neil)	2	1578.9	1153.9	2	1614.4	1153.9	0	0	0	0	0	0
2	Coleman ,F (Ferdinand)	2	1	0	2	1	0	0	0	0	0	0	0
2	Coleman ,F (Ferdinand)	2	1428.1	1428.1	2	1429.1	1428.1	0	0	0	0	0	0
3	Madziwa ,K (Kupakwashe)	1	1	425	1	1	425	0	0	0	0	0	0
3	Madziwa ,K (Kupakwashe)	1	1200	1625	1	1200	1625	0	0	0	0	0	0
4	Glynn ,A (Alexander)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Glynn ,A (Alexander)	1	1418.6	993.6	1	1427.1	993.6	0	0	0	0	0	0
5	Theunissen ,B (Brooklyn)	1	0	-425	1	0	-425	0	0	0	0	0	0
5	Theunissen ,B (Brooklyn)	1	1237.2	812.2	1	1239.7	812.2	0	0	0	0	0	0
6	Chaonwa ,N (Nathan)	1	0	-425	1	0	-425	0	0	0	0	0	0
6	Chaonwa ,N (Nathan)	1	1331	906	1	1336.4	906	0	0	0	0	0	0
7	Willemse ,E (Elizur)	1	1	425	1	1	425	0	0	0	0	0	0
7	Willemse ,E (Elizur)	1	1213.8	1638.8	1	1215.2	1638.8	0	0	0	0	0	0
8	Frans ,S (Sherwin)	1	1	425	1	1	425	0	0	0	0	0	0
8	Frans ,S (Sherwin)	1	1174.9	1599.9	1	1181.1	1599.9	0	0	0	0	0	0
9	Tobey ,B (Buhle)	1	0.5	0	1	0.5	0	0	0	0	0	0	0
9	Tobey ,B (Buhle)	1	1200	1200	1	1200	1200	0	0	0	0	0	0
10	Bruiners ,N (Nate)	1	1	425	1	1	425	0	0	0	0	0	0
10	Bruiners ,N (Nate)	1	1200	1625	1	1200	1625	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

Kajiwa, I (Irvin)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms