Chess South Africa Ratings Database

PLAYER PAGE

Personal

Koen, G (Gustav)

Chess SA id

1160158922

FIDE id

Date of birth

2016-01-19 (U12)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-10-25

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1286.8	1267.7	1332.7	1200
Raw rating	1273.7	1228	1332.7	1200
Weighted rating	1286.8	1267.7	1316.7	1200
Weighted performance	1221.2	1105.4	1204.8	0
Floor	829.1	829.1	832.7	700
K-factor	36	36	36	36
Min/Max rating change allowed	149.3	159.3	137.2	165.8
Highest rating	1553.7 2023-07-01	1347.9 2023-09-01	1633 2023-07-01	1200 2018-10-01
Highest raw rating	1329.1 2024-11-01	1329.1 2025-03-01	1332.7 2025-11-30	1200 2024-03-01
Highest weighted rating	1329.1 2025-05-05	1274.4 2025-08-01	1318.5 2025-03-01	1200 2018-10-01
Highest weighted performance	1553.7 2023-07-01	1347.9 2023-09-01	1633 2023-07-01	1200 2024-03-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	-1	-2.9	0	0
New rating	1285.8	1264.8	1332.7	1200
Analysis
Rating	1286.8	1267.7	1332.7	1200
Raw rating	1273.7	1228	1332.7	1200
Weighted rating	1286.8	1267.7	1316.7
Weighted performance	1221.2	1105.4	1204.8
K-factor	36	36	36	36
Floor	829.1	829.1	832.7	700
Max/Min rating change allowed	149.3	159.3	137.2	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	1273.7	1228	1332.7	1200
New weighted rating	1285.8	1264.8	1318.2	1200
New weighted performance	1212.9	1097.7	1196.5	0
Temp new rating	1285.8	1264.8	1332.7	1200
Temp new rating +/-	-1	-2.9	0	0
Final new rating +/-	-1	-2.9	0	0
New rating	1285.8	1264.8	1332.7	1200
New K-factor	36	36	36	36
New floor	829.1	829.1	832.7	700

Item	Main	Standard	Rapid
	0	0	0
	67	33	34
	32	26	6
	15	5	10
	0	0	0
	0	0	0
History	114	64	50

Games since
	Main 99	Standard 59		Rapid 40		Blitz 0
Gender	Male
Age group	U10
Region	Cape Town (WCT)
Province	Western Cape (WC)
Main
	RSA		Province		Region
Overall	3395		1116		452
Male	2643		833		357
U10	292		94		30
U10 Male	233		69		24
Standard
	RSA		Province		Region
Overall	3445		976		412
Male	2661		697		313
U10	293		84		25
U10 Male	233		58		19
Rapid
	RSA		Province		Region
Overall	857		437		193
Male	707		363		173
U10	66		36		13
U10 Male	55		29		10
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U10	-1		-1		-1
U10 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	67	32	47.76	-19	1284.7	1265.6
Standard	33	16.5	50	0	1275.2	1275.2
Rapid	34	15.5	45.59	-37.5	1293.8	1256.3
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	114	62	54.39	37.3	1256.8	1294.1
Standard	64	34.5	53.91	33.2	1246.2	1279.4
Rapid	50	27.5	55	42.5	1270.3	1312.8
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2026-01-01	1273.7	1228	1332.7	1200
2025-11-30	1273.7	1228	1332.7	1200
2025-11-01	1259.9	1228	1330.9	1200
2025-09-30	1307.2	1274.4	1330.9	1200
2025-09-01	1288.9	1274.4	1309.7	1200
2025-08-01	1288.9	1274.4	1309.7	1200
2025-07-01	1287.8	1272.9	1309.3	1200
2025-06-01	1286.8	1278.6	1308.9	1200
2025-05-01	1287.2	1310.4	1307.9	1200
2025-04-01	1285.9	1310.4	1304.1	1200
2025-03-01	1307.9	1329.1	1304.3	1200
2025-02-01	1280.9	1288.1	1300.2	1200
2025-01-01	1278	1252.2	1318.5	1200
2024-12-01	1278	1252.2	1318.5	1200
2024-11-01	1329.1	1306.6	1318.5	1200
2024-10-01	1317.4	1282.8	1318.5	1200
2024-09-01	1317.4	1282.8	1318.5	1200
2024-11-01	1317.4	1282.8	1318.5	1200
2024-07-01	1260.9	1229.2	1306.6	1200
2024-06-01	1260.9	1229.2	1306.6	1200
2024-05-01	1260.9	1229.2	1306.6	1200
2024-04-01	1260.9	1229.2	1306.6	1200
2024-03-01	1274	1237.8	1306.6	1200
2024-02-01	1282.4	1232.4	1306.6	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	Gordons Bay Primary Chess Championship 2025 (Open)	2025-10-25	2025-10-25	Rapid	Cape Town (WCT)	5	5	3	Yes	Analysis
2	Cape Town Chess Federation Club League 2025 (E)	2025-08-16	2025-08-23	Standard	Cape Town (WCT)	6	6	2	Yes	Analysis
3	Rhenish Primary 2025 (U10)	2025-09-20	2025-09-20	Rapid	Cape Winelands (WCW)	5	5	3	Yes	Analysis
4	Helderberg Chess Club Open 2025 (U9)	2025-06-07	2025-06-07	Standard	Cape Town (WCT)	5	5	2	Yes	Analysis
5	Western Cape Schools Individual Championship 2025 (U9 Boys)	2025-05-17	2025-05-18	Standard	Cape Winelands (WCW)	6	6	2	Yes	Analysis
6	Cape Town Open Chess Festival 2025 (Junior Rapid)	2025-03-21	2025-03-21	Rapid	Cape Town (WCT)	6	6	2	Yes	Analysis
7	CT Metro Schools Individual Closed 2025 (U9 Open)	2025-03-01	2025-03-02	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
8	Cape of Good Hope Open 2025 (U10)	2025-02-22	2025-02-22	Rapid	Cape Town (WCT)	6	6	3	Yes	Analysis
9	CT Metro District East Schools Chess Individuals Trials 2025 (U9 Boys)	2025-02-01	2025-02-01	Standard	Cape Town (WCT)	5	5	4	Yes	Analysis
10	Helderberg Chess Club PS Development Tournament 2025 (U9)	2025-01-25	2025-01-25	Standard	Cape Town (WCT)	5	5	3.5	Yes	Analysis
11	2025 Kraaifontein Open Chess Championships (Rapid Open)	2025-01-05	2025-01-05	Rapid	Cape Town (WCT)	6	6	0	Yes	Analysis
12	2025 Kraaifontein Open Chess Championships (Rapid U10)	2025-01-04	2025-01-04	Rapid	Cape Town (WCT)	6	6	4.5	Yes	Analysis
13	Helderberg Chess Club Open 2024 (B)	2024-11-09	2024-11-10	Standard	Cape Town (WCT)	6	5	1.5	Yes	Analysis
14	Grant East Annual Primary School Invitational Chess Tournament 2024 (U9)	2024-10-05	2024-10-05	Standard	Cape Town (WCT)	5	5	3.5	Yes	Analysis
15	CT Metro District East Top Schools Chess 2024 (U9 Mixed)	2024-07-27	2024-07-28	Standard	Cape Town (WCT)	5	5	4	Yes	Analysis
16	Curro Durbanville Chess Rapid Open 2024 (Beginner)	2024-07-13	2024-07-13	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
17	Cape Town Metro Schools Chess Closed Individuals 2024 (U9 Boys)	2024-03-02	2024-03-03	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
18	CT District East Schools Chess Individuals Trails 2024 (U7+U9 Boys)	2024-02-03	2024-02-03	Standard	Cape Town (WCT)	5	5	3	Yes	Analysis
19	Grant East Primary School Invitational Chess Tournament 2023 (U9 Mixed)	2023-11-04	2023-11-04	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
20	Western Cape Top Schools 2023 (U9 Mixed)	2023-09-02	2023-09-03	Standard	Cape Winelands (WCW)	6	5	3	Yes	Analysis
21	CT Metro District East Top Schools Chess 2023 (U9 Mixed)	2023-07-29	2023-07-29	Rapid	Cape Town (WCT)	5	4	4	Yes	Analysis

#	Games	Start				End
1	6	Tournament CT Metro District East Top Schools Chess 2023				Tournament Western Cape Top Schools 2023
		date 2023-07-29	rnd 1	type Rapid	result 1	date 2023-09-02	rnd 3	type Standard	result 1
		Opponent Foster, B (Bjorn)				Opponent Marner, L (Loannes)
2	4	Tournament CT Metro District East Schools Chess Individuals Trials 2025				Tournament CT Metro District East Schools Chess Individuals Trials 2025
		date 2025-02-01	rnd 2	type Standard	result 1	date 2025-02-01	rnd 5	type Standard	result 1
		Opponent Chidzvondo, N (Nathaniel)				Opponent Chumpitaz Avila, J (Josef)
3	4	Tournament 2025 Kraaifontein Open Chess Championships				Tournament 2025 Kraaifontein Open Chess Championships
		date 2025-01-04	rnd 3	type Rapid	result 1	date 2025-01-04	rnd 6	type Rapid	result 1
		Opponent Balogun, S (Samuel)				Opponent May, A (Avumile)

#	Games	Start				End
1	6	Tournament CT Metro District East Schools Chess Individuals Trials 2025				Tournament CT Metro Schools Individual Closed 2025
		date 2025-02-01	rnd 2	type Standard	result 1	date 2025-03-01	rnd 2	type Standard	result 1
		Opponent Chidzvondo, N (Nathaniel)				Opponent Lekau, A (Atlegang Jordan)
2	4	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament CT Metro District East Top Schools Chess 2024
		date 2024-03-03	rnd 6	type Standard	result 1	date 2024-07-27	rnd 3	type Standard	result 1
		Opponent Pieterse, Z (Zanru)				Opponent Flatela, K (Khayone)
3	3	Tournament Grant East Annual Primary School Invitational Chess Tournament 2024				Tournament Helderberg Chess Club Open 2024
		date 2024-10-05	rnd 4	type Standard	result 0.5	date 2024-11-09	rnd 1	type Standard	result 0.5
		Opponent Foster, B (Bjorn)				Opponent Nakani, M (Milani)

#	Games	Start				End
1	7	Tournament CT Metro District East Top Schools Chess 2023				Tournament Grant East Primary School Invitational Chess Tournament 2023
		date 2023-07-29	rnd 1	type Rapid	result 1	date 2023-11-04	rnd 3	type Rapid	result 1
		Opponent Foster, B (Bjorn)				Opponent Erasmus, C (Caleb)
2	4	Tournament 2025 Kraaifontein Open Chess Championships				Tournament 2025 Kraaifontein Open Chess Championships
		date 2025-01-04	rnd 3	type Rapid	result 1	date 2025-01-04	rnd 6	type Rapid	result 1
		Opponent Balogun, S (Samuel)				Opponent May, A (Avumile)
3	3	Tournament Cape Town Open Chess Festival 2025				Tournament Rhenish Primary 2025
		date 2025-03-21	rnd 6	type Rapid	result 1	date 2025-09-20	rnd 2	type Rapid	result 1
		Opponent Rubenstein, O (Oliver)				Opponent Verhoeven, L (Liam)

No games found.

#	Games	Start				End

#	Games	Start				End
1	6	Tournament CT Metro District East Top Schools Chess 2023				Tournament Western Cape Top Schools 2023
		date 2023-07-29	rnd 1	type Rapid	result 1	date 2023-09-02	rnd 3	type Standard	result 1
		Opponent Foster, B (Bjorn)				Opponent Marner, L (Loannes)
2	4	Tournament CT Metro District East Schools Chess Individuals Trials 2025				Tournament CT Metro District East Schools Chess Individuals Trials 2025
		date 2025-02-01	rnd 2	type Standard	result 1	date 2025-02-01	rnd 5	type Standard	result 1
		Opponent Chidzvondo, N (Nathaniel)				Opponent Chumpitaz Avila, J (Josef)
3	4	Tournament Curro Durbanville Chess Rapid Open 2024				Tournament CT Metro District East Top Schools Chess 2024
		date 2024-07-13	rnd 6	type Rapid	result 1	date 2024-07-27	rnd 3	type Standard	result 1
		Opponent Badenhuizen, D (Dylan)				Opponent Flatela, K (Khayone)

#	Games	Start				End
1	6	Tournament CT Metro District East Schools Chess Individuals Trials 2025				Tournament CT Metro Schools Individual Closed 2025
		date 2025-02-01	rnd 2	type Standard	result 1	date 2025-03-01	rnd 2	type Standard	result 1
		Opponent Chidzvondo, N (Nathaniel)				Opponent Lekau, A (Atlegang Jordan)
2	4	Tournament Cape Town Metro Schools Chess Closed Individuals 2024				Tournament CT Metro District East Top Schools Chess 2024
		date 2024-03-03	rnd 6	type Standard	result 1	date 2024-07-27	rnd 3	type Standard	result 1
		Opponent Pieterse, Z (Zanru)				Opponent Flatela, K (Khayone)
3	3	Tournament CT Metro District East Top Schools Chess 2024				Tournament Grant East Annual Primary School Invitational Chess Tournament 2024
		date 2024-07-28	rnd 5	type Standard	result 1	date 2024-10-05	rnd 2	type Standard	result 1
		Opponent Louw, J (Jean)				Opponent Van Wyk, A (Anika)

#	Games	Start				End
1	7	Tournament CT Metro District East Top Schools Chess 2023				Tournament Grant East Primary School Invitational Chess Tournament 2023
		date 2023-07-29	rnd 1	type Rapid	result 1	date 2023-11-04	rnd 3	type Rapid	result 1
		Opponent Foster, B (Bjorn)				Opponent Erasmus, C (Caleb)
2	3	Tournament Cape Town Open Chess Festival 2025				Tournament Rhenish Primary 2025
		date 2025-03-21	rnd 6	type Rapid	result 1	date 2025-09-20	rnd 2	type Rapid	result 1
		Opponent Rubenstein, O (Oliver)				Opponent Verhoeven, L (Liam)
3	2	Tournament Cape of Good Hope Open 2025				Tournament Cape Town Open Chess Festival 2025
		date 2025-02-22	rnd 6	type Rapid	result 1	date 2025-03-21	rnd 1	type Rapid	result 1
		Opponent Mdashe, I (Iliso)				Opponent Muller, M (Marcus)

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	Poole ,C (Cayden)	3	0.5	-283.3	3	0.5	-283.3	0	0	0	0	0	0
1	Poole ,C (Cayden)	3	1255.1	971.8	3	1250.5	971.8	0	0	0	0	0	0
2	Foster ,B (Bjorn)	3	2.5	283.3	2	1.5	212.5	1	1	425	0	0	0
2	Foster ,B (Bjorn)	3	1184.6	1467.9	2	1196.8	1397.1	1	1182.2	1609.6	0	0	0
3	Burnett ,T (Tomas)	2	0	-425	2	0	-425	0	0	0	0	0	0
3	Burnett ,T (Tomas)	2	1305	880	2	1279.1	880	0	0	0	0	0	0
4	Lourens ,S (Simeon Juda)	2	1	0	2	1	0	0	0	0	0	0	0
4	Lourens ,S (Simeon Juda)	2	1434	1434	2	1439.8	1434	0	0	0	0	0	0
5	Onyire ,W (Winner)	2	2	425	2	2	425	0	0	0	0	0	0
5	Onyire ,W (Winner)	2	1176.2	1601.2	2	1205.9	1601.2	0	0	0	0	0	0
6	Zwartz ,Z (Zeke)	2	1	0	1	0	-425	1	1	425	0	0	0
6	Zwartz ,Z (Zeke)	2	1385.2	1385.2	1	1308.8	960.2	1	1390.8	1810.2	0	0	0
7	May ,A (Avumile)	2	2	425	1	1	425	1	1	425	0	0	0
7	May ,A (Avumile)	2	1198.4	1623.4	1	1213.1	1623.4	1	1178.8	1623.4	0	0	0
8	Lin ,J (Junming)	2	0	-425	1	0	-425	1	0	-425	0	0	0
8	Lin ,J (Junming)	2	1396	971	1	1200	971	1	1449.7	971	0	0	0
9	Balogun ,S (Samuel)	2	1	0	1	0	-425	1	1	425	0	0	0
9	Balogun ,S (Samuel)	2	1394.8	1394.8	1	1389.5	969.8	1	1200	1819.8	0	0	0
10	Van Wyk ,A (Alonzo)	2	2	425	1	1	425	1	1	425	0	0	0
10	Van Wyk ,A (Alonzo)	2	1131.8	1556.8	1	1136.8	1556.8	1	1166	1556.8	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Koen, G (Gustav)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms