Chess South Africa Ratings Database

PLAYER PAGE

Personal

Koen, I (Ivan)

Chess SA id

105054141

FIDE id

Date of birth

2005-11-18 (Adult)

Gender

Male

Region

Eden (WEG)

Citizen

RSA

Titles

Chess SA registered

Last active game

2023-12-10

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1557.8	1539.6	1270.6	1376.7
Raw rating	1557.8	1539.6	1270.6	1376.7
Weighted rating	1557.8	1539.6	1269.8	1376
Weighted performance	1157.7	1121.4	0	0
Floor	1057.8	1039.6	770.6	901.7
K-factor	32	32	36	32
Min/Max rating change allowed	99.6	102.2	149.9	128.9
Highest rating	1569.8 2023-07-01	1539.6 2024-02-01	1270.6 2024-02-01	1609.5 2023-07-01
Highest raw rating	1557.8 2024-02-01	1539.6 2024-02-01	1270.6 2024-02-01	1401.7 2023-10-01
Highest weighted rating	1557.7 2025-08-01	1539.4 2025-08-01	1267.8 2025-08-01	1401.7 2025-06-01
Highest weighted performance	1569.8 2023-07-01	1510.3 2023-05-01	1266.6 2022-08-01	1609.5 2023-07-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1557.8	1539.6	1270.6	1376.7
Analysis
Rating	1557.8	1539.6	1270.6	1376.7
Raw rating	1557.8	1539.6	1270.6	1376.7
Weighted rating	1557.8	1539.6	1269.8
Weighted performance	1157.7	1121.4	0
K-factor	32	32	36	32
Floor	1057.8	1039.6	770.6	901.7
Max/Min rating change allowed	99.6	102.2	149.9	128.9
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	1557.8	1539.6	1270.6	1376.7
New weighted rating	1557.8	1539.6	1270.3	1376
New weighted performance	1157.2	1120.9	0	0
Temp new rating	1557.8	1539.6	1270.6	1376.7
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1557.8	1539.6	1270.6	1376.7
New K-factor	32	32	36	32
New floor	1057.8	1039.6	770.6	901.7

Item	Main	Standard	Rapid	Blitz
	0	0	0	0
	0	0	0	0
	0	0	0	0
	46	23	0	23
	63	57	6	0
	5	0	5	0
History	408	323	62	23

Games since
	Main 11	Standard 4		Rapid 0		Blitz 7
Gender	Male
Age group	Adult
Region	Eden (WEG)
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	198	138	69.7	167.4	1270.6	1438
Standard	164	114	69.51	165.9	1236.2	1402.1
Rapid	11	6.5	59.09	77.3	1408.9	1486.2
Blitz	23	17.5	76.09	221.7	1449.5	1671.3

Date	Main	Standard	Rapid	Blitz
2025-09-30	1557.8	1539.6	1270.6	1376.7
2025-09-01	1557.8	1539.6	1270.6	1376.7
2025-08-01	1557.8	1539.6	1270.6	1376.7
2025-07-01	1557.8	1539.6	1270.6	1376.7
2025-06-01	1557.8	1539.6	1270.6	1376.7
2025-05-01	1557.8	1539.6	1270.6	1376.5
2025-04-01	1557.8	1539.6	1270.6	1375.7
2025-03-01	1557.8	1539.6	1270.6	1375.6
2025-02-01	1557.8	1539.6	1270.6	1375.6
2025-01-01	1557.8	1539.6	1270.6	1375.6
2024-12-01	1557.8	1539.6	1270.6	1375.6
2024-11-01	1557.8	1539.6	1270.6	1375.6
2024-10-01	1557.8	1539.6	1270.6	1375.6
2024-09-01	1557.8	1539.6	1270.6	1375.6
2024-08-01	1557.8	1539.6	1270.6	1375.6
2024-07-01	1557.8	1539.6	1270.6	1375.6
2024-06-01	1557.8	1539.6	1270.6	1375.6
2024-08-01	1557.8	1539.6	1270.6	1375.6
2024-04-01	1557.8	1539.6	1270.6	1375.6
2024-03-01	1557.8	1539.6	1270.6	1375.6
2024-02-01	1557.8	1539.6	1270.6	1375.6
2024-01-01	1557.8	1539.6	1270.6	1375.6
2023-12-01	1557.8	1539.6	1188	1357.2
2023-11-01	1551.1	1528.4	1188	1401.7

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	2023 Western Cape Rural Cup (U20)	2023-12-09	2023-12-10	Standard	Cape Winelands (WCW)	5	4	3	Yes	Analysis
2	2023 Western Cape Rural Cup (Blitz)	2023-12-08	2023-12-08	Blitz	Cape Winelands (WCW)	7	7	4	Yes	Analysis
3	Pacaltsdorp Chess Club Open 2023 (A)	2023-08-26	2023-08-26	Rapid	Eden (WEG)	6	0	0	No	Analysis
4	InterClub Blitz 3 2023	2023-07-20	2023-07-20	Blitz	Eden (WEG)	10	8	7.5	Yes	Analysis
5	Inter Club Blitz 2 2023 (Open)	2023-06-21	2023-06-21	Blitz	Eden (WEG)	10	8	6	Yes	Analysis
6	Eden Trials 2+3 2023 (U20)	2023-04-15	2023-05-13	Standard	Eden (WEG)	10	10	8	Yes	Analysis
7	Eden Trails 1 2023 (U19 Boys)	2023-03-11	2023-03-11	Standard	Eden (WEG)	5	4	3	Yes	Analysis
8	George Chess Trials 1 2023 (U19 Boys)	2023-01-28	2023-01-28	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
9	Mossel Bay Open 2022 (A)	2022-09-30	2022-10-02	Standard	Eden (WEG)	6	5	1.5	Yes	Analysis
10	Pacaltsdorp Chess Club 2022 (A)	2022-08-27	2022-08-27	Rapid	Eden (WEG)	6	6	4	Yes	Analysis
11	Eden Topskole 2022 (O18 Ope)	2022-08-13	2022-08-13	Standard	Eden (WEG)	5	4	3.5	Yes	Analysis
12	NSSC Winter Games 2022 (U18 Boys)	2022-07-04	2022-07-06	Standard	Cape Town (WCT)	7	7	3.5	Yes	Analysis
13	Western Cape Schools Chess 2022 (U18 Boys)	2022-05-07	2022-05-08	Standard	Eden (WEG)	6	6	4.5	Yes	Analysis
14	Eden Proewe 2 2022 (O18 Seuns)	2022-04-09	2022-04-09	Standard	Eden (WEG)	5	5	4	Yes	Analysis
15	Eden Open 2022 (A)	2022-04-22	2022-04-24	Standard	Eden (WEG)	6	6	2.5	Yes	Analysis
16	Eden Proewe 1 2022 (O18 Seuns)	2022-03-12	2022-03-12	Standard	Eden (WEG)	5	5	4.5	Yes	Analysis
17	South African Junior Closed Chess Championships 2022 (U18 Open)	2022-03-28	2022-04-02	Standard	Chess South Africa (CSA)	11	9	1.5	Yes	Analysis
18	George Trials 3 2022 (U18)	2022-02-26	2022-02-26	Standard	Eden (WEG)	5	5	4	Yes	Analysis
19	George Trials 2 2022 (U18)	2022-02-12	2022-02-12	Standard	Eden (WEG)	5	5	4	Yes	Analysis
20	Eden Proewe 2021 (O18 Seuns)	2021-10-15	2021-10-15	Rapid	Eden (WEG)	5	5	2.5	Yes	Analysis
21	Eden Schools Closed Trials 1 2020 (U15 Boys)	2020-03-07	2020-03-07	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
22	George Trial 3 2020 (U16)	2020-02-22	2020-02-22	Standard	Eden (WEG)	5	4	3.5	Yes	Analysis
23	Eden Trials 3 2019 (U16 Open)	2019-05-11	2019-05-11	Standard	Eden (WEG)	5	5	4	Yes	Analysis
24	Western Cape Schools Individuals 2019 (U15 Boys)	2019-05-04	2019-05-05	Standard	Eden (WEG)	6	5	3	Yes	Analysis
25	Eden Trials 2 2019 (U16 Open)	2019-04-13	2019-04-13	Standard	Eden (WEG)	5	5	4	Yes	Analysis
26	Eden Trials 1 2019 (U16 Open)	2019-03-02	2019-03-02	Standard	Eden (WEG)	5	5	4	Yes	Analysis
27	George Trials 2 2019 (U16)	2019-02-09	2019-02-09	Standard	Eden (WEG)	5	5	3.5	Yes	Analysis
28	South African Junior Team Championships 2018 (U14A)	2018-12-16	2018-12-20	Standard	4 Knights (4K)	7	7	0.5	Yes	Analysis
29	Western Cape Top Schools 2018 (U13 Mix)	2018-08-25	2018-08-26	Standard	Overberg (WOS)	5	5	4.5	Yes	Analysis
30	Eden Top Schools 2018 (U13 Mix)	2018-07-28	2018-07-28	Standard	Eden (WEG)	5	5	5	Yes	Analysis
31	EDENSC Closed 3 2018 (U14 Open)	2018-05-12	2018-05-12	Standard	Eden (WEG)	5	5	4.5	Yes	Analysis
32	Western Cape Schools Individuals 2018 (U13 Boys)	2018-05-19	2018-05-20	Standard	Overberg (WOS)	6	6	5	Yes	Analysis
33	EDENSC Closed 2 2018 (U14 Open)	2018-04-14	2018-04-14	Standard	Eden (WEG)	5	5	5	Yes	Analysis
34	George Trails 3 2018 (U14)	2018-02-24	2018-02-24	Standard	Eden (WEG)	5	5	4	Yes	Analysis
35	George Trails 1 2018 (U14)	2018-01-27	2018-01-27	Standard	Eden (WEG)	5	5	5	Yes	Analysis
36	South African Junior Team Championships 2017 (U14B)	2018-01-04	2018-01-08	Standard	4 Knights (4K)	7	7	4	Yes	Analysis

#	Games	Start				End
1	14	Tournament EDENSC Closed 2 2018				Tournament Western Cape Schools Individuals 2018
		date 2018-04-14	rnd 1	type Standard	result 1	date 2018-05-19	rnd 4	type Standard	result 1
		Opponent Francke, C (Charl)				Opponent Kleinhans, T (Theo)
2	13	Tournament Inter Club Blitz 2 2023				Tournament InterClub Blitz 3 2023
		date 2023-06-21	rnd 5	type Blitz	result 1	date 2023-07-20	rnd 8	type Blitz	result 1
		Opponent Frans, LG (Llewellyn)				Opponent Kruger, S (Sachin)
3	13	Tournament South African Junior Team Championships 2017				Tournament George Trails 3 2018
		date 2018-01-05	rnd 4	type Standard	result 1	date 2018-02-24	rnd 4	type Standard	result 1
		Opponent Hardy, N (Noah)				Opponent Holm, C (Conrad)

#	Games	Start				End
1	14	Tournament EDENSC Closed 2 2018				Tournament Western Cape Schools Individuals 2018
		date 2018-04-14	rnd 1	type Standard	result 1	date 2018-05-19	rnd 4	type Standard	result 1
		Opponent Francke, C (Charl)				Opponent Kleinhans, T (Theo)
2	13	Tournament South African Junior Team Championships 2017				Tournament George Trails 3 2018
		date 2018-01-05	rnd 4	type Standard	result 1	date 2018-02-24	rnd 4	type Standard	result 1
		Opponent Hardy, N (Noah)				Opponent Holm, C (Conrad)
3	11	Tournament Western Cape Schools Individuals 2018				Tournament Western Cape Top Schools 2018
		date 2018-05-20	rnd 6	type Standard	result 1	date 2018-08-26	rnd 5	type Standard	result 0.5
		Opponent Joubert, K (Keegan)				Opponent Joubert, N (Natasha)

#	Games	Start				End
1	3	Tournament Pacaltsdorp Chess Club 2022				Tournament Pacaltsdorp Chess Club 2022
		date 2022-08-27	rnd 4	type Rapid	result 1	date 2022-08-27	rnd 6	type Rapid	result 1
		Opponent Oktober, J (Jayson)				Opponent Pryse, JAY (Jayson)
2	2	Tournament Eden Proewe 2021				Tournament Eden Proewe 2021
		date 2021-10-15	rnd 3	type Rapid	result 0.5	date 2021-10-15	rnd 4	type Rapid	result 1
		Opponent Le Roux, G (Gerrit)				Opponent Blaauw, L (Lucin)
3	1	Tournament Pacaltsdorp Chess Club 2022				Tournament Pacaltsdorp Chess Club 2022
		date 2022-08-27	rnd 1	type Rapid	result 1	date 2022-08-27	rnd 1	type Rapid	result 1
		Opponent Wilson, RP (Reginald)				Opponent Wilson, RP (Reginald)

#	Games	Start				End
1	13	Tournament Inter Club Blitz 2 2023				Tournament InterClub Blitz 3 2023
		date 2023-06-21	rnd 5	type Blitz	result 1	date 2023-07-20	rnd 8	type Blitz	result 1
		Opponent Frans, LG (Llewellyn)				Opponent Kruger, S (Sachin)
2	2	Tournament 2023 Western Cape Rural Cup				Tournament 2023 Western Cape Rural Cup
		date 2023-12-08	rnd 6	type Blitz	result 1	date 2023-12-08	rnd 7	type Blitz	result 1
		Opponent Africa, L (Lindsay)				Opponent Du Toit, J (Jaywin)
3	2	Tournament 2023 Western Cape Rural Cup				Tournament 2023 Western Cape Rural Cup
		date 2023-12-08	rnd 2	type Blitz	result 1	date 2023-12-08	rnd 3	type Blitz	result 1
		Opponent Kuyler, L (Luzandri)				Opponent Pekeur, A (Aldo)

#	Games	Start				End
1	10	Tournament Western Cape Schools Individuals 2018				Tournament Western Cape Top Schools 2018
		date 2018-05-20	rnd 6	type Standard	result 1	date 2018-08-26	rnd 4	type Standard	result 1
		Opponent Joubert, K (Keegan)				Opponent Allie, A (Alliyah)
2	9	Tournament Inter Club Blitz 2 2023				Tournament InterClub Blitz 3 2023
		date 2023-06-21	rnd 5	type Blitz	result 1	date 2023-07-20	rnd 4	type Blitz	result 1
		Opponent Frans, LG (Llewellyn)				Opponent Nortje, P (Pieter)
3	9	Tournament EDENSC Closed 2 2018				Tournament EDENSC Closed 3 2018
		date 2018-04-14	rnd 1	type Standard	result 1	date 2018-05-12	rnd 4	type Standard	result 1
		Opponent Francke, C (Charl)				Opponent Prince, SN (Sharna)

#	Games	Start				End
1	10	Tournament Western Cape Schools Individuals 2018				Tournament Western Cape Top Schools 2018
		date 2018-05-20	rnd 6	type Standard	result 1	date 2018-08-26	rnd 4	type Standard	result 1
		Opponent Joubert, K (Keegan)				Opponent Allie, A (Alliyah)
2	9	Tournament EDENSC Closed 2 2018				Tournament EDENSC Closed 3 2018
		date 2018-04-14	rnd 1	type Standard	result 1	date 2018-05-12	rnd 4	type Standard	result 1
		Opponent Francke, C (Charl)				Opponent Prince, SN (Sharna)
3	9	Tournament George Trails 1 2018				Tournament George Trails 3 2018
		date 2018-01-27	rnd 1	type Standard	result 1	date 2018-02-24	rnd 4	type Standard	result 1
		Opponent Lindsay, J (Jordan)				Opponent Holm, C (Conrad)

#	Games	Start				End
1	3	Tournament Pacaltsdorp Chess Club 2022				Tournament Pacaltsdorp Chess Club 2022
		date 2022-08-27	rnd 4	type Rapid	result 1	date 2022-08-27	rnd 6	type Rapid	result 1
		Opponent Oktober, J (Jayson)				Opponent Pryse, JAY (Jayson)
2	1	Tournament Pacaltsdorp Chess Club 2022				Tournament Pacaltsdorp Chess Club 2022
		date 2022-08-27	rnd 1	type Rapid	result 1	date 2022-08-27	rnd 1	type Rapid	result 1
		Opponent Wilson, RP (Reginald)				Opponent Wilson, RP (Reginald)
3	1	Tournament Eden Proewe 2021				Tournament Eden Proewe 2021
		date 2021-10-15	rnd 4	type Rapid	result 1	date 2021-10-15	rnd 4	type Rapid	result 1
		Opponent Blaauw, L (Lucin)				Opponent Blaauw, L (Lucin)

#	Games	Start				End
1	9	Tournament Inter Club Blitz 2 2023				Tournament InterClub Blitz 3 2023
		date 2023-06-21	rnd 5	type Blitz	result 1	date 2023-07-20	rnd 4	type Blitz	result 1
		Opponent Frans, LG (Llewellyn)				Opponent Nortje, P (Pieter)
2	3	Tournament InterClub Blitz 3 2023				Tournament InterClub Blitz 3 2023
		date 2023-07-20	rnd 6	type Blitz	result 1	date 2023-07-20	rnd 8	type Blitz	result 1
		Opponent Daniels, R (Reuben)				Opponent Kruger, S (Sachin)
3	2	Tournament 2023 Western Cape Rural Cup				Tournament 2023 Western Cape Rural Cup
		date 2023-12-08	rnd 6	type Blitz	result 1	date 2023-12-08	rnd 7	type Blitz	result 1
		Opponent Africa, L (Lindsay)				Opponent Du Toit, J (Jaywin)

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	Meyer ,J (Jared)	7	6	303.6	7	6	303.6	0	0	0	0	0	0
1	Meyer ,J (Jared)	7	1398.3	1701.9	7	1373.7	1701.9	0	0	0	0	0	0
2	Taute ,C (Clayden)	5	1.5	-170	4	1.5	-106.2	1	0	-425	0	0	0
2	Taute ,C (Clayden)	5	1564.1	1394.1	4	1591.9	1457.8	1	769.8	1139.1	0	0	0
3	Prince ,SN (Sharna Nicole)	4	3.5	318.8	4	3.5	318.8	0	0	0	0	0	0
3	Prince ,SN (Sharna Nicole)	4	1216	1534.8	4	1230.9	1534.8	0	0	0	0	0	0
4	Eksteen ,LH (Leigh-Hende Hendre)	4	3.5	318.8	3	2.5	283.3	1	1	425	0	0	0
4	Eksteen ,LH (Leigh-Hende Hendre)	4	1173.1	1491.8	3	1140.8	1456.4	1	878	1598.1	0	0	0
5	Sheldon ,A (Ackim)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
5	Sheldon ,A (Ackim)	3	1182.6	1324.3	3	1187.1	1324.3	0	0	0	0	0	0
6	Pietersen ,J (Juwellyn)	3	3	425	3	3	425	0	0	0	0	0	0
6	Pietersen ,J (Juwellyn)	3	1028.8	1453.8	3	1030	1453.8	0	0	0	0	0	0
7	Coetsee ,W (Wilco)	3	3	425	3	3	425	0	0	0	0	0	0
7	Coetsee ,W (Wilco)	3	952.9	1377.9	3	956.2	1377.9	0	0	0	0	0	0
8	Daniels ,M (Muhammed)	3	2	141.7	3	2	141.7	0	0	0	0	0	0
8	Daniels ,M (Muhammed)	3	1194	1335.6	3	1220.7	1335.6	0	0	0	0	0	0
9	Blaauw ,L (Lucin)	3	3	425	2	2	425	1	1	425	0	0	0
9	Blaauw ,L (Lucin)	3	1422.2	1847.2	2	1514.6	1847.2	1	1184.8	1847.2	0	0	0
10	Nortje ,P (Pieter)	3	2	141.7	0	0	0	1	0	-425	2	2	425
10	Nortje ,P (Pieter)	3	1361.6	1503.2	0	0	0	1	1200	936.6	2	1302.9	1786.6

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

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Personal

Koen, I (Ivan)

Ratings

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Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms