Chess South Africa Ratings Database

PLAYER PAGE

Personal

Koch, Z (Zachary)

Chess SA id

1070145616

FIDE id

Date of birth

2007-09-19 (U20)

Gender

Male

Region

Johannesburg Metro (GJM)

Citizen

RSA

Titles

Chess SA registered

Last active game

2024-07-27

Personal details last changed

1900-01-01

Junior GPX Games

Junior GPX Points

Item	Main	Standard	Rapid	Blitz
Rating	1344.1	1367.9	1200	1200.7
Raw rating	1344.1	1367.9	1200	1200.7
Weighted rating	1344	1367.8	1200	1200.6
Weighted performance	1044.5	0	0	0
Floor	852.3	867.9	700	700.7
K-factor	36	36	36	36
Min/Max rating change allowed	135	130.5	165.8	165.7
Highest rating	1549.9 2023-06-01	1540.6 2023-06-01	1200 2018-10-01	1213.1 2024-07-01
Highest raw rating	1352.3 2024-04-01	1367.9 2024-04-01	1200 2024-02-01	1200.7 2024-08-01
Highest weighted rating	1352.3 2025-05-05	1367.7 2025-08-01	1200 2018-10-01	1200.5 2025-08-01
Highest weighted performance	1549.9 2023-06-01	1540.6 2023-06-01	1200 2024-02-01	1213.1 2024-07-01

Prediction
Item	Main	Standard	Rapid	Blitz
Rating change	0	0	0	0
New rating	1344.1	1367.9	1200	1200.7
Analysis
Rating	1344.1	1367.9	1200	1200.7
Raw rating	1344.1	1367.9	1200	1200.7
Weighted rating	1344	1367.8	1200
Weighted performance	1044.5	0	0
K-factor	36	36	36	36
Floor	852.3	867.9	700	700.7
Max/Min rating change allowed	135	130.5	165.8	165.7
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	1344.1	1367.9	1200	1200.7
New weighted rating	1343.9	1367.8	1200	1200.6
New weighted performance	1044.1	0	0	0
Temp new rating	1344.1	1367.9	1200	1200.7
Temp new rating +/-	0	0	0	0
Final new rating +/-	0	0	0	0
New rating	1344.1	1367.9	1200	1200.7
New K-factor	36	36	36	36
New floor	852.3	867.9	700	700.7

Item	Main	Standard	Blitz
	0	0	0
	0	0	0
	13	5	8
	10	10	0
	5	5	0
	0	0	0
History	28	20	8

Games since
	Main 13	Standard 5		Rapid 0		Blitz 8
Gender	Male
Age group	U20
Region	Johannesburg Metro (GJM)
Province	Gauteng (GT)
Main
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Standard
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Rapid
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 Male	-1		-1		-1
Blitz
	RSA		Province		Region
Overall	-1		-1		-1
Male	-1		-1		-1
U20	-1		-1		-1
U20 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	28	18	64.29	121.4	1276.1	1397.5
Standard	20	14	70	170	1299.5	1469.5
Rapid	0	0	0	0	0	0
Blitz	8	4	50	0	1217.5	1217.5

Date	Main	Standard	Rapid	Blitz
2025-09-30	1344.1	1367.9	1200	1200.7
2025-09-01	1344.1	1367.9	1200	1200.7
2025-08-01	1344.1	1367.9	1200	1200.7
2025-07-01	1344.1	1367.9	1200	1200.7
2025-06-01	1344.1	1367.9	1200	1200.7
2025-05-01	1344.1	1367.9	1200	1200.7
2025-04-01	1343.8	1367.9	1200	1200.7
2025-03-01	1343.3	1367.9	1200	1200.7
2025-02-01	1342.5	1367.9	1200	1200.7
2025-01-01	1340.9	1367.9	1200	1200.7
2024-12-01	1340.9	1367.9	1200	1200.7
2024-11-01	1340.9	1367.9	1200	1200.7
2024-10-01	1340.9	1367.9	1200	1200.7
2024-09-01	1340.9	1367.9	1200	1200.7
2024-08-01	1340.9	1367.9	1200	1200.7
2024-07-01	1352.3	1367.9	1200	1200
2024-06-01	1352.3	1367.9	1200	1200
2024-08-01	1352.3	1367.9	1200	1200
2024-04-01	1352.3	1367.9	1200	1200
2024-03-01	1343.9	1366.1	1200	1200
2024-02-01	1343.9	1366.1	1200	1200
2024-01-01	1343.9	1366.1	1200	1200
2023-12-01	1343.9	1366.1	1200	1200
2023-11-01	1343.9	1366.1	1200	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	Helpmekaar Kollege Blitz Chess Invitational 2024 (B)	2024-07-27	2024-07-27	Blitz	Johannesburg Metro (GJM)	9	8	4	Yes	Analysis
2	JNW Open - Classic - Crawford 2024 (B)	2024-03-09	2024-03-09	Standard	Johannesburg Metro (GJM)	5	5	2	Yes	Analysis
3	JNW Open - Trinityhouse Little Falls 2023 (C)	2023-06-24	2023-06-24	Standard	Johannesburg Metro (GJM)	5	5	5	Yes	Analysis
4	JNW Open - Crawford 2023 (C)	2023-03-04	2023-03-04	Standard	Johannesburg Metro (GJM)	5	5	4	Yes	Analysis
5	JMC 2nd Trials 2022 (D)	2022-08-27	2022-08-27	Standard	Johannesburg Metro (GJM)	5	5	3	Yes	Analysis

#	Games	Start				End
1	8	Tournament JNW Open - Crawford 2023				Tournament JNW Open - Trinityhouse Little Falls 2023
		date 2023-03-04	rnd 3	type Standard	result 1	date 2023-06-24	rnd 5	type Standard	result 1
		Opponent Pieters, N (Nicholas)				Opponent Kayiya, A (Anashe)
2	4	Tournament JMC 2nd Trials 2022				Tournament JNW Open - Crawford 2023
		date 2022-08-27	rnd 3	type Standard	result 1	date 2023-03-04	rnd 1	type Standard	result 1
		Opponent Prakash, M (Maisha)				Opponent Ramaila, M (Mahlogonolo)
3	3	Tournament Helpmekaar Kollege Blitz Chess Invitational 2024				Tournament Helpmekaar Kollege Blitz Chess Invitational 2024
		date 2024-07-27	rnd 6	type Blitz	result 0.5	date 2024-07-27	rnd 8	type Blitz	result 1
		Opponent Munyai, R (Rinae)				Opponent De Jager, M (Matthew)

#	Games	Start				End
1	8	Tournament JNW Open - Crawford 2023				Tournament JNW Open - Trinityhouse Little Falls 2023
		date 2023-03-04	rnd 3	type Standard	result 1	date 2023-06-24	rnd 5	type Standard	result 1
		Opponent Pieters, N (Nicholas)				Opponent Kayiya, A (Anashe)
2	4	Tournament JMC 2nd Trials 2022				Tournament JNW Open - Crawford 2023
		date 2022-08-27	rnd 3	type Standard	result 1	date 2023-03-04	rnd 1	type Standard	result 1
		Opponent Prakash, M (Maisha)				Opponent Ramaila, M (Mahlogonolo)
3	1	Tournament JNW Open - Classic - Crawford 2024				Tournament JNW Open - Classic - Crawford 2024
		date 2024-03-09	rnd 4	type Standard	result 1	date 2024-03-09	rnd 4	type Standard	result 1
		Opponent Botha, C (Cathri Amari)				Opponent Botha, C (Cathri Amari)

No games found.

#	Games	Start				End

#	Games	Start				End
1	3	Tournament Helpmekaar Kollege Blitz Chess Invitational 2024				Tournament Helpmekaar Kollege Blitz Chess Invitational 2024
		date 2024-07-27	rnd 6	type Blitz	result 0.5	date 2024-07-27	rnd 8	type Blitz	result 1
		Opponent Munyai, R (Rinae)				Opponent De Jager, M (Matthew)
2	2	Tournament Helpmekaar Kollege Blitz Chess Invitational 2024				Tournament Helpmekaar Kollege Blitz Chess Invitational 2024
		date 2024-07-27	rnd 1	type Blitz	result 1	date 2024-07-27	rnd 3	type Blitz	result 1
		Opponent Pillay, J (Judah)				Opponent Doherty, F (Felix)

#	Games	Start				End
1	8	Tournament JNW Open - Crawford 2023				Tournament JNW Open - Trinityhouse Little Falls 2023
		date 2023-03-04	rnd 3	type Standard	result 1	date 2023-06-24	rnd 5	type Standard	result 1
		Opponent Pieters, N (Nicholas)				Opponent Kayiya, A (Anashe)
2	4	Tournament JMC 2nd Trials 2022				Tournament JNW Open - Crawford 2023
		date 2022-08-27	rnd 3	type Standard	result 1	date 2023-03-04	rnd 1	type Standard	result 1
		Opponent Prakash, M (Maisha)				Opponent Ramaila, M (Mahlogonolo)
3	2	Tournament Helpmekaar Kollege Blitz Chess Invitational 2024				Tournament Helpmekaar Kollege Blitz Chess Invitational 2024
		date 2024-07-27	rnd 1	type Blitz	result 1	date 2024-07-27	rnd 3	type Blitz	result 1
		Opponent Pillay, J (Judah)				Opponent Doherty, F (Felix)

#	Games	Start				End
1	8	Tournament JNW Open - Crawford 2023				Tournament JNW Open - Trinityhouse Little Falls 2023
		date 2023-03-04	rnd 3	type Standard	result 1	date 2023-06-24	rnd 5	type Standard	result 1
		Opponent Pieters, N (Nicholas)				Opponent Kayiya, A (Anashe)
2	4	Tournament JMC 2nd Trials 2022				Tournament JNW Open - Crawford 2023
		date 2022-08-27	rnd 3	type Standard	result 1	date 2023-03-04	rnd 1	type Standard	result 1
		Opponent Prakash, M (Maisha)				Opponent Ramaila, M (Mahlogonolo)
3	1	Tournament JNW Open - Classic - Crawford 2024				Tournament JNW Open - Classic - Crawford 2024
		date 2024-03-09	rnd 4	type Standard	result 1	date 2024-03-09	rnd 4	type Standard	result 1
		Opponent Botha, C (Cathri Amari)				Opponent Botha, C (Cathri Amari)

No games found.

#	Games	Start				End

#	Games	Start				End
1	2	Tournament Helpmekaar Kollege Blitz Chess Invitational 2024				Tournament Helpmekaar Kollege Blitz Chess Invitational 2024
		date 2024-07-27	rnd 1	type Blitz	result 1	date 2024-07-27	rnd 3	type Blitz	result 1
		Opponent Pillay, J (Judah)				Opponent Doherty, F (Felix)
2	1	Tournament Helpmekaar Kollege Blitz Chess Invitational 2024				Tournament Helpmekaar Kollege Blitz Chess Invitational 2024
		date 2024-07-27	rnd 8	type Blitz	result 1	date 2024-07-27	rnd 8	type Blitz	result 1
		Opponent De Jager, M (Matthew)				Opponent De Jager, M (Matthew)

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	Van Den Berg ,R (Reuben)	1	0	-425	1	0	-425	0	0	0	0	0	0
1	Van Den Berg ,R (Reuben)	1	1149.5	724.5	1	1138.4	724.5	0	0	0	0	0	0
2	Sukraj ,T (Tasvir)	1	0	-425	1	0	-425	0	0	0	0	0	0
2	Sukraj ,T (Tasvir)	1	1200	775	1	1200	775	0	0	0	0	0	0
3	Mcpherson ,N (Naleli)	1	0	-425	1	0	-425	0	0	0	0	0	0
3	Mcpherson ,N (Naleli)	1	1547.3	1122.3	1	1576.8	1122.3	0	0	0	0	0	0
4	Cilliers ,R (Ruben)	1	0	-425	1	0	-425	0	0	0	0	0	0
4	Cilliers ,R (Ruben)	1	1247.1	822.1	1	1247.1	822.1	0	0	0	0	0	0
5	Stelloh ,S (Sebastian)	1	1	425	1	1	425	0	0	0	0	0	0
5	Stelloh ,S (Sebastian)	1	1397.1	1822.1	1	1391.1	1822.1	0	0	0	0	0	0
6	Swartz ,K (Kent Pierre)	1	1	425	1	1	425	0	0	0	0	0	0
6	Swartz ,K (Kent Pierre)	1	1464	1889	1	1455.4	1889	0	0	0	0	0	0
7	Adamson ,A (Amani)	1	1	425	1	1	425	0	0	0	0	0	0
7	Adamson ,A (Amani)	1	1261.4	1686.4	1	1259.9	1686.4	0	0	0	0	0	0
8	Botha ,CA (Cathri Amari)	1	1	425	1	1	425	0	0	0	0	0	0
8	Botha ,CA (Cathri Amari)	1	1383.7	1808.7	1	1359.5	1808.7	0	0	0	0	0	0
9	Steyn ,A (Anneke)	1	1	425	1	1	425	0	0	0	0	0	0
9	Steyn ,A (Anneke)	1	1235.2	1660.2	1	1225.7	1660.2	0	0	0	0	0	0
10	Williams ,J (Joshua)	1	1	425	1	1	425	0	0	0	0	0	0
10	Williams ,J (Joshua)	1	1225.3	1650.3	1	1222.5	1650.3	0	0	0	0	0	0

Norms

No norms achieved.

#	Norm	Tournament	Start	End	Rounds	Games	Score	Details

Ratings

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PLAYER PAGE

Personal

Koch, Z (Zachary)

Ratings

Game statistics

Rankings

Historical performance

Last 24 raw ratings

Rating graph

Tournaments

Top 3 Streaks

Top 10 opponents most often played

Norms