Chess South Africa
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Chess South Africa
Koch, Z (Zachary)
Dob:
2007/09/19 (U18)
Gender:
Male
Chess SA id:
1070145616
FIDE id:
Region:
Johannesburg Metro (GJM)
Citizen:
RSA
Title(s):
Last active:
2024/03/09 (111 days ago)
Ratings
The
Projected values
below are
NOT
the actual and official values as calculated by the Ratings Bureau.
Main
Standard
Rapid
Blitz
Raw rating
=Current rating,
Weighted rating (WR)
=Weighted average of current/new Raw rating + last 23 published Raw ratings),
Weighted performance (WP)
=Weighted average of last 5 tournaments
Current Raw rating
1352.3
Current Weighted rating
1321.7
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)
1352.3
Current highest rating achieved
1352.3
Current floor (min rating allowed)
852.3
Current K-factor
36
Games played this month
0
Score (S)
0.0
Expected score (We)
0.00
Difference (S-We)
0.00
Current Raw change (no limits, including tournament time weight)
0.0
Current min/max change allowed (with limits)
±133.5
Current Raw change used (final)
0.0
Projected new Raw rating
1352.3
Projected new Weighed rating
1218.5
Projected new Weighted performance
1228.3
Projected new final Raw rating (if new WP > new Raw)
1352.3
Projected new highest rating
1352.3
Projected new floor
852.3
Projected new K-facor
36
Projected new official/published rating (highest between new Raw, new WR and new WP)
1352.3
Projected effective change (new Official - current Official)
=0.0
Raw rating
=Current rating,
Weighted rating (WR)
=Weighted average of current/new Raw rating + last 23 published Raw ratings),
Weighted performance (WP)
=Weighted average of last 5 tournaments
Current Raw rating
1367.9
Current Weighted rating
1338.8
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)
1367.9
Current highest rating achieved
1367.9
Current floor (min rating allowed)
867.9
Current K-factor
36
Games played this month
0
Score (S)
0.0
Expected score (We)
0.00
Difference (S-We)
0.00
Current Raw change (no limits, including tournament time weight)
0.0
Current min/max change allowed (with limits)
±130.5
Current Raw change used (final)
0.0
Projected new Raw rating
1367.9
Projected new Weighed rating
1234.5
Projected new Weighted performance
1228.3
Projected new final Raw rating (if new WP > new Raw)
1367.9
Projected new highest rating
1367.9
Projected new floor
867.9
Projected new K-facor
36
Projected new official/published rating (highest between new Raw, new WR and new WP)
1367.9
Projected effective change (new Official - current Official)
=0.0
Raw rating
=Current rating,
Weighted rating (WR)
=Weighted average of current/new Raw rating + last 23 published Raw ratings),
Weighted performance (WP)
=Weighted average of last 5 tournaments
Current Raw rating
1200.0
Current Weighted rating
1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)
1200.0
Current highest rating achieved
1200.0
Current floor (min rating allowed)
700.0
Current K-factor
36
s
Games played this month
0
Score (S)
0.0
Expected score (We)
0.00
Difference (S-We)
0.00
Current Raw change (no limits, including tournament time weight)
0.0
Current min/max change allowed (with limits)
±165.8
Current Raw change used (final)
0.0
Projected new Raw rating
1200.0
Projected new Weighed rating
1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating
1200.0
Projected new floor
700.0
Projected new K-facor
36
Projected new official/published rating (highest between new Raw, new WR and new WP)
1200.0
Projected effective change (new Official - current Official)
=0.0
Raw rating
=Current rating,
Weighted rating (WR)
=Weighted average of current/new Raw rating + last 23 published Raw ratings),
Weighted performance (WP)
=Weighted average of last 5 tournaments
Current Raw rating
1200.0
Current Weighted rating
1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)
1200.0
Current highest rating achieved
1200.0
Current floor (min rating allowed)
700.0
Current K-factor
36
Games played this month
0
Score (S)
0.0
Expected score (We)
0.00
Difference (S-We)
0.00
Current Raw change (no limits, including tournament time weight)
0.0
Current min/max change allowed (with limits)
±165.8
Current Raw change used (final)
0.0
Projected new Raw rating
1200.0
Projected new Weighed rating
1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating
1200.0
Projected new floor
700.0
Projected new K-facor
36
Projected new official/published rating (highest between new Raw, new WR and new WP)
1200.0
Projected effective change (new Official - current Official)
=0.0
Tournaments
History
Did not participate this month.
#
Tournament
Start
End
Host
Type
Time
Weight
Rns
Gms
Scr
Main
Type
Analysis
1
JNW Open - Classic - Crawford 2024 (B)
2024/03/09
2024/03/09
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
2.0
1343.9
1366.1
Analysis
#
Tournament
Start
End
Host
Type
Time
Weight
Rounds
Games
Score
Main
Type
Analysis
4
JNW Open - Classic - Crawford 2024 (B)
2024/03/09
2024/03/09
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
2.0
1343.9
1366.1
Analysis
3
JNW Open - Trinityhouse Little Falls 2023 (C)
2023/06/24
2023/06/24
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
5.0
1259.6
1270.3
Analysis
2
JNW Open - Crawford 2023 (C)
2023/03/04
2023/03/04
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
4.0
1213.6
1215.6
Analysis
1
JMC 2nd Trials 2022 (D)
2022/08/27
2022/08/27
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
3.0
1200.0
1200.0
Analysis
Game History
History
Colour
Games
Wins
Draws
Losses
Score
%
Dp
Aor
Perform
Main
All
5
2
0
3
2.0
40.0
-85.0
1470.4
1385.4
White
2
2
0
0
2.0
100.0
425.0
1350.2
1775.2
Black
3
0
0
3
0.0
0.0
-425.0
1550.6
1125.6
Standard
All
5
2
0
3
2.0
40.0
-85.0
1470.4
1385.4
White
2
2
0
0
2.0
100.0
425.0
1350.2
1775.2
Black
3
0
0
3
0.0
0.0
-425.0
1550.6
1125.6
Rapid
All
0
0
0
0
0.0
0.0
0.0
0.0
0.0
White
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Black
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Blitz
All
0
0
0
0
0.0
0.0
0.0
0.0
0.0
White
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Black
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Colour
Games
Wins
Draws
Losses
Score
%
Dp
Aor
Perform
Main
All
20
14
0
6
14.0
70.0
170.0
1299.5
1469.5
White
10
9
0
1
9.0
90.0
340.0
1242.9
1582.9
Black
10
5
0
5
5.0
50.0
0.0
1356.2
1356.2
Standard
All
20
14
0
6
14.0
70.0
170.0
1299.5
1469.5
White
10
9
0
1
9.0
90.0
340.0
1242.9
1582.9
Black
10
5
0
5
5.0
50.0
0.0
1356.2
1356.2
Rapid
All
0
0
0
0
0.0
0.0
0.0
0.0
0.0
White
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Black
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Blitz
All
0
0
0
0
0.0
0.0
0.0
0.0
0.0
White
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Black
0
0
0
0
0.0
0.0
0.0
0.0
0.0
Top 20 opponents most often played
#
Chess SA id
Name
Games
Score
Wins
Draws
Losses
%
Aor
Dp
Perform
View
1
211091693
Steyn, A (Anneke)
1
1.0
1
0
0
100.0
1213.6
425.0
1638.6
View list
2
1150145631
Stelloh, S (Sebastian)
1
1.0
1
0
0
100.0
1259.6
425.0
1684.6
View list
3
2140145625
Shi, P (Peiqi)
1
1.0
1
0
0
100.0
1200.0
425.0
1625.0
View list
4
1070151814
Ramaila, M (Mahlogonolo)
1
1.0
1
0
0
100.0
1213.6
425.0
1638.6
View list
5
2120143693
Prakash, M (Maisha)
1
1.0
1
0
0
100.0
1200.0
425.0
1625.0
View list
6
1090151812
Pieters, N (Nicholas)
1
1.0
1
0
0
100.0
1213.6
425.0
1638.6
View list
7
1130145622
Parag Jugmohan, T (Tejas)
1
1.0
1
0
0
100.0
1200.0
425.0
1625.0
View list
8
1120152458
Chadalavada, B (Bhaarghavarama)
1
1.0
1
0
0
100.0
1343.9
425.0
1768.9
View list
9
2110130015
Botha, C (Cathri Amari)
1
1.0
1
0
0
100.0
1343.9
425.0
1768.9
View list
10
2100131209
Adamson, A (Amani)
1
1.0
1
0
0
100.0
1213.6
425.0
1638.6
View list
11
111092267
D`Alton, E (Ezra)
1
1.0
1
0
0
100.0
1259.6
425.0
1684.6
View list
12
2100100924
Kayiya, A (Anashe)
1
1.0
1
0
0
100.0
1259.6
425.0
1684.6
View list
13
1090147255
Swartz, K (Kent Pierre)
1
1.0
1
0
0
100.0
1259.6
425.0
1684.6
View list
14
1120132213
Williams, J (Joshua)
1
1.0
1
0
0
100.0
1259.6
425.0
1684.6
View list
15
1130143797
Van Den Berg, R (Reuben)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
16
1090145626
Sukraj, T (Tasvir)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
17
108073207
Horn, E (Evan)
1
0.0
0
0
1
0.0
1343.9
-425.0
918.9
View list
18
1070108325
Cilliers, R (Ruben)
1
0.0
0
0
1
0.0
1213.6
-425.0
788.6
View list
19
173004580
Chikwava, R (Ronald)
1
0.0
0
0
1
0.0
1343.9
-425.0
918.9
View list
20
2980141708
Mcpherson, N (Naleli)
1
0.0
0
0
1
0.0
1343.9
-425.0
918.9
View list