Chess South Africa Ratings Database

PLAYER PAGE

Personal

Koetser, J (Joshua)

Chess SA id

1080193698

FIDE id

Date of birth

2008-08-04 (U18)

Gender

Male

Region

Cape Town (WCT)

Citizen

RSA

Titles

Chess SA registered

Last active game

2025-02-09

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1310.6	1277.8	1268.8	1200
Raw rating	1310.6	1277.8	1268.8	1200
Weighted rating	1300.4	1270.5	1258.2	1200
Weighted performance	1148.7	0	0	0
Floor	828.2	789.7	768.8	700
K-factor	36	36	36	36
Min/Max rating change allowed	141.6	148.4	150.3	165.8
Highest rating	1337.1 2024-09-01	1336.9 2024-09-01	1350.4 2024-09-01	1200 2024-02-01
Highest raw rating	1328.2 2024-10-01	1289.7 2024-10-01	1268.8 2024-10-01	1200 2024-02-01
Highest weighted rating	1290.5 2025-08-01	1263.6 2025-08-01	1250.7 2025-08-01	1200 2024-02-01
Highest weighted performance	1337.1 2024-09-01	1336.9 2024-09-01	1350.4 2024-09-01	1200 2024-02-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1310.6	1277.8	1268.8	1200
Analysis
Rating	1310.6	1277.8	1268.8	1200
Raw rating	1310.6	1277.8	1268.8	1200
Weighted rating	1300.4	1270.5	1258.2
Weighted performance	1148.7	0	0
K-factor	36	36	36	36
Floor	828.2	789.7	768.8	700
Max/Min rating change allowed	141.6	148.4	150.3	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	1310.6	1277.8	1268.8	1200
New weighted rating	1303	1272.3	1260.3	1200
New weighted performance	1147.3	0	0	0
Temp new rating	1310.6	1277.8	1268.8	1200
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1310.6	1277.8	1268.8	1200
New K-factor	36	36	36	36
New floor	828.2	789.7	768.8	700

Item	Main	Standard	Rapid
	0	0	0
	6	6	0
	28	16	12
	0	0	0
	0	0	0
	0	0	0
History	34	22	12

Games since
	Main 34	Standard 22		Rapid 12		Blitz 0
Gender	Male
Age group	U18
Region	Cape Town (WCT)
Province	Western Cape (WC)
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	6	3	50	0	1243.9	1243.9
Standard	6	3	50	0	1243.9	1243.9
Rapid	0	0	0	0	0	0
Blitz	0	0	0	0	0	0
History
	Games	Score	%	Dp	AvgOpp	Performance
Main	34	19.5	57.35	62.5	1288.5	1351
Standard	22	13	59.09	77.3	1267.7	1344.9
Rapid	12	6.5	54.17	35.4	1326.8	1362.3
Blitz	0	0	0	0	0	0

Date	Main	Standard	Rapid	Blitz
2025-11-01	1310.6	1277.8	1268.8	1200
2025-09-30	1310.6	1277.8	1268.8	1200
2025-09-01	1310.6	1277.8	1268.8	1200
2025-08-01	1310.6	1277.8	1268.8	1200
2025-07-01	1310.6	1277.8	1268.8	1200
2025-06-01	1310.6	1277.8	1268.8	1200
2025-05-01	1310.6	1277.8	1268.8	1200
2025-04-01	1310.6	1277.8	1268.8	1200
2025-03-01	1310.6	1277.8	1268.8	1200
2025-02-01	1328.2	1289.7	1268.8	1200
2025-01-01	1328.2	1289.7	1268.8	1200
2024-12-01	1328.2	1289.7	1268.8	1200
2024-11-01	1328.2	1289.7	1268.8	1200
2024-10-01	1328.2	1289.7	1268.8	1200
2024-09-01	1243.4	1228.5	1218	1200
2024-08-01	1243.4	1228.5	1218	1200
2024-07-01	1243.4	1228.5	1218	1200
2024-09-01	1243.4	1228.5	1218	1200
2024-05-01	1233.4	1228.5	1200	1200
2024-04-01	1233.4	1228.5	1200	1200
2024-03-01	1209.6	1208	1200	1200
2024-02-01	1200	1200	1200	1200
2024-01-01	1200	1200	1200	1200
2023-12-01	1200	1200	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	CT Metro North Schools Chess Individual Trials 2025 (U17 Open)	2025-02-08	2025-02-09	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis

Last 500 tournaments since 01 January 2018

#	Tournament	Start	End	Type	Host	Rounds	Games	Score	Cfr	Analysis
1	CT Metro North Schools Chess Individual Trials 2025 (U17 Open)	2025-02-08	2025-02-09	Standard	Cape Town (WCT)	6	6	3	Yes	Analysis
2	CT League 2024 (D)	2024-08-03	2024-08-03	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
3	CBC Rapid Chess Tournament 2024 (U16)	2024-09-14	2024-09-14	Rapid	Cape Town (WCT)	6	6	4	Yes	Analysis
4	Steinitz Chess Festival 2024 (Open Rapid)	2024-05-11	2024-05-11	Rapid	Cape Town (WCT)	6	6	2.5	Yes	Analysis
5	Cape Town Open Chess Championship 2024 (Beginner)	2024-03-16	2024-03-17	Standard	Cape Town (WCT)	6	6	4	Yes	Analysis
6	North District School Trials 2024 (U18 Boys)	2024-02-03	2024-02-03	Standard	Cape Town (WCT)	5	4	2	Yes	Analysis

#	Games	Start				End
1	3	Tournament CT League 2024				Tournament CBC Rapid Chess Tournament 2024
		date 2024-08-03	rnd 5	type Standard	result 1	date 2024-09-14	rnd 1	type Rapid	result 1
		Opponent Fourie, R (Ruan)				Opponent Chilenga, B (Blessing)
2	2	Tournament CBC Rapid Chess Tournament 2024				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2024-09-14	rnd 6	type Rapid	result 1	date 2025-02-08	rnd 1	type Standard	result 1
		Opponent Mlungwana, P (Philani)				Opponent O`connell, G (Geordan)
3	2	Tournament CBC Rapid Chess Tournament 2024				Tournament CBC Rapid Chess Tournament 2024
		date 2024-09-14	rnd 3	type Rapid	result 1	date 2024-09-14	rnd 4	type Rapid	result 1
		Opponent Uchendu, D (David)				Opponent Groenewaldt, O (Orren)

#	Games	Start				End
1	3	Tournament CT League 2024				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2024-08-03	rnd 5	type Standard	result 1	date 2025-02-08	rnd 1	type Standard	result 1
		Opponent Fourie, R (Ruan)				Opponent O`connell, G (Geordan)
2	3	Tournament Cape Town Open Chess Championship 2024				Tournament CT League 2024
		date 2024-03-17	rnd 5	type Standard	result 1	date 2024-08-03	rnd 1	type Standard	result 1
		Opponent Williams, N (Nicole)				Opponent Michaelides, A (Alexander)
3	2	Tournament North District School Trials 2024				Tournament North District School Trials 2024
		date 2024-02-03	rnd 1	type Standard	result 1	date 2024-02-03	rnd 2	type Standard	result 1
		Opponent Miller, K (Kenwyn)				Opponent Li, T (Traynor)

#	Games	Start				End
1	2	Tournament CBC Rapid Chess Tournament 2024				Tournament CBC Rapid Chess Tournament 2024
		date 2024-09-14	rnd 3	type Rapid	result 1	date 2024-09-14	rnd 4	type Rapid	result 1
		Opponent Uchendu, D (David)				Opponent Groenewaldt, O (Orren)
2	2	Tournament Steinitz Chess Festival 2024				Tournament CBC Rapid Chess Tournament 2024
		date 2024-05-11	rnd 6	type Rapid	result 0.5	date 2024-09-14	rnd 1	type Rapid	result 1
		Opponent Sun, H (Haojia)				Opponent Chilenga, B (Blessing)
3	2	Tournament Steinitz Chess Festival 2024				Tournament Steinitz Chess Festival 2024
		date 2024-05-11	rnd 3	type Rapid	result 1	date 2024-05-11	rnd 4	type Rapid	result 1
		Opponent Uys, I (Ivan)				Opponent Prins, S (Stefan)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament CT League 2024				Tournament CBC Rapid Chess Tournament 2024
		date 2024-08-03	rnd 5	type Standard	result 1	date 2024-09-14	rnd 1	type Rapid	result 1
		Opponent Fourie, R (Ruan)				Opponent Chilenga, B (Blessing)
2	2	Tournament CBC Rapid Chess Tournament 2024				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2024-09-14	rnd 6	type Rapid	result 1	date 2025-02-08	rnd 1	type Standard	result 1
		Opponent Mlungwana, P (Philani)				Opponent O`connell, G (Geordan)
3	2	Tournament CBC Rapid Chess Tournament 2024				Tournament CBC Rapid Chess Tournament 2024
		date 2024-09-14	rnd 3	type Rapid	result 1	date 2024-09-14	rnd 4	type Rapid	result 1
		Opponent Uchendu, D (David)				Opponent Groenewaldt, O (Orren)

#	Games	Start				End
1	3	Tournament CT League 2024				Tournament CT Metro North Schools Chess Individual Trials 2025
		date 2024-08-03	rnd 5	type Standard	result 1	date 2025-02-08	rnd 1	type Standard	result 1
		Opponent Fourie, R (Ruan)				Opponent O`connell, G (Geordan)
2	3	Tournament Cape Town Open Chess Championship 2024				Tournament CT League 2024
		date 2024-03-17	rnd 5	type Standard	result 1	date 2024-08-03	rnd 1	type Standard	result 1
		Opponent Williams, N (Nicole)				Opponent Michaelides, A (Alexander)
3	2	Tournament North District School Trials 2024				Tournament North District School Trials 2024
		date 2024-02-03	rnd 1	type Standard	result 1	date 2024-02-03	rnd 2	type Standard	result 1
		Opponent Miller, K (Kenwyn)				Opponent Li, T (Traynor)

#	Games	Start				End
1	2	Tournament CBC Rapid Chess Tournament 2024				Tournament CBC Rapid Chess Tournament 2024
		date 2024-09-14	rnd 3	type Rapid	result 1	date 2024-09-14	rnd 4	type Rapid	result 1
		Opponent Uchendu, D (David)				Opponent Groenewaldt, O (Orren)
2	2	Tournament Steinitz Chess Festival 2024				Tournament Steinitz Chess Festival 2024
		date 2024-05-11	rnd 3	type Rapid	result 1	date 2024-05-11	rnd 4	type Rapid	result 1
		Opponent Uys, I (Ivan)				Opponent Prins, S (Stefan)
3	1	Tournament CBC Rapid Chess Tournament 2024				Tournament CBC Rapid Chess Tournament 2024
		date 2024-09-14	rnd 6	type Rapid	result 1	date 2024-09-14	rnd 6	type Rapid	result 1
		Opponent Mlungwana, P (Philani)				Opponent Mlungwana, P (Philani)

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	Fourie ,R (Ruan)	1	1	425	1	1	425	0	0	0	0	0	0
1	Fourie ,R (Ruan)	1	1362.1	1787.1	1	1311.4	1787.1	0	0	0	0	0	0
2	Williams ,R (Reinaert)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Williams ,R (Reinaert)	1	1285.1	860.1	1	1269.9	860.1	0	0	0	0	0	0
3	Li ,T (Traynor)	1	1	425	1	1	425	0	0	0	0	0	0
3	Li ,T (Traynor)	1	1292.1	1717.1	1	1263.5	1717.1	0	0	0	0	0	0
4	Smit ,M (Mario)	1	1	425	1	1	425	0	0	0	0	0	0
4	Smit ,M (Mario)	1	1154.8	1579.8	1	1163	1579.8	0	0	0	0	0	0
5	Arluck ,M (Matthew)	1	1	425	1	1	425	0	0	0	0	0	0
5	Arluck ,M (Matthew)	1	1139.4	1564.4	1	1135.1	1564.4	0	0	0	0	0	0
6	Cassiem ,J (Junayd)	1	1	425	1	1	425	0	0	0	0	0	0
6	Cassiem ,J (Junayd)	1	1107.1	1532.1	1	1158.8	1532.1	0	0	0	0	0	0
7	Michaels ,DJ (Deon Jerome)	1	0	-425	1	0	-425	0	0	0	0	0	0
7	Michaels ,DJ (Deon Jerome)	1	1764.9	1339.9	1	1765.1	1339.9	0	0	0	0	0	0
8	Nelson ,OS (Olenka Shai)	1	1	425	1	1	425	0	0	0	0	0	0
8	Nelson ,OS (Olenka Shai)	1	1127	1552	1	1084.4	1552	0	0	0	0	0	0
9	Degueldre ,J (Jean-Christian)	1	0	-425	1	0	-425	0	0	0	0	0	0
9	Degueldre ,J (Jean-Christian)	1	1681.6	1256.6	1	1691.8	1256.6	0	0	0	0	0	0
10	Williams ,N (Nicole)	1	1	425	1	1	425	0	0	0	0	0	0
10	Williams ,N (Nicole)	1	1206.1	1631.1	1	1191.7	1631.1	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

Koetser, J (Joshua)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms