Chess South Africa
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Chess South Africa
Johnston, Z (Zach)
Dob:
2010/11/10 (U16)
Gender:
Male
Chess SA id:
1100137580
FIDE id:
Region:
Cape Winelands (WCW)
Citizen:
RSA
Title(s):
Last active:
2023/08/19 (272 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
Curent Raw rating
1204.7
Curent Weighted rating
1203.3
Curent Weighted performance
0.0
Current official/published rating (highest between Raw, WR and WP)
1204.7
Current floor (min rating allowed)
704.7
Current highest rating achieved
1204.7
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)
±164.7
Current Raw change used (final)
0.0
Projected new Raw rating
1204.7
Projected new Weighed rating
1203.5
Projected new Weighted performance
0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)
1204.7
Projected effective change (new Official - current Official)
=0.0
Projected new highest rating
1204.7
Projected new floor
704.7
Projected new K-facor
36
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
Curent Raw rating
1195.2
Curent Weighted rating
1195.2
Curent Weighted performance
0.0
Current official/published rating (highest between Raw, WR and WP)
1195.2
Current floor (min rating allowed)
695.2
Current highest rating achieved
1195.2
Current K-factor
40
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)
±167.0
Current Raw change used (final)
0.0
Projected new Raw rating
1195.2
Projected new Weighed rating
1195.2
Projected new Weighted performance
0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)
1195.2
Projected effective change (new Official - current Official)
=0.0
Projected new highest rating
1195.2
Projected new floor
695.2
Projected new K-facor
40
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
Curent Raw rating
1180.4
Curent Weighted rating
1179.2
Curent Weighted performance
0.0
Current official/published rating (highest between Raw, WR and WP)
1180.4
Current floor (min rating allowed)
681.6
Current highest rating achieved
1181.6
Current K-factor
40
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)
±170.5
Current Raw change used (final)
0.0
Projected new Raw rating
1180.4
Projected new Weighed rating
1179.4
Projected new Weighted performance
0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)
1180.4
Projected effective change (new Official - current Official)
=0.0
Projected new highest rating
1181.6
Projected new floor
681.6
Projected new K-facor
40
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
Curent Raw rating
1200.0
Curent Weighted rating
1200.0
Curent Weighted performance
0.0
Current official/published rating (highest between Raw, WR and WP)
1200.0
Current floor (min rating allowed)
681.6
Current highest rating achieved
1200.0
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
1200.0
Projected new Weighted performance
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
Projected new highest rating
1200.0
Projected new floor
681.6
Projected new K-facor
36
Tournaments
History
Did not participate this month.
Did not participate this year.
#
Tournament
Start
End
Host
Type
Time
Weight
Rounds
Games
Score
Main
Type
Analysis
4
Stellenbosch Primary Chess Tournament 2023 (U14)
2023/08/19
2023/08/19
Cape Winelands (WCW)
Rapid
30
0.60
6
6
3.0
1202.1
1181.6
Analysis
3
Rhenish Primary Tournament 2023 (U14)
2023/05/13
2023/05/13
Cape Winelands (WCW)
Rapid
30
0.60
6
5
3.0
1199.7
1174.4
Analysis
2
Rhenish Primary Tournament 2022 (U14)
2022/05/14
2022/05/14
Cape Winelands (WCW)
Rapid
30
0.60
5
5
2.5
1201.4
1200.0
Analysis
1
Cape Winelands Open 2022 (U14)
2022/02/12
2022/02/13
Cape Winelands (WCW)
Standard
70
0.87
6
6
3.0
1200.0
1200.0
Analysis
Game History
History
Colour
Games
Wins
Draws
Losses
Score
%
Dp
Aor
Perform
Main
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
Standard
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
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
22
11
1
10
11.5
52.3
19.3
1177.5
1196.9
White
12
6
0
6
6.0
50.0
0.0
1173.8
1173.8
Black
10
5
1
4
5.5
55.0
42.5
1182.0
1224.5
Standard
All
6
3
0
3
3.0
50.0
0.0
1217.8
1217.8
White
4
2
0
2
2.0
50.0
0.0
1226.7
1226.7
Black
2
1
0
1
1.0
50.0
0.0
1200.0
1200.0
Rapid
All
16
8
1
7
8.5
53.1
26.6
1162.4
1189.0
White
8
4
0
4
4.0
50.0
0.0
1147.3
1147.3
Black
8
4
1
3
4.5
56.3
53.1
1177.5
1230.7
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
1090137576
Bakkes, F (Finn)
1
1.0
1
0
0
100.0
1200.0
425.0
1625.0
View list
2
1090140768
Solomon, B (Brooklyn)
1
1.0
1
0
0
100.0
1201.4
425.0
1626.4
View list
3
1090140765
Schreve, E (Eduard)
1
1.0
1
0
0
100.0
1201.4
425.0
1626.4
View list
4
110086016
Van Wyk, H (Harry)
1
1.0
1
0
0
100.0
1199.7
425.0
1624.7
View list
5
2090137492
Walters, M (Mia)
1
1.0
1
0
0
100.0
1200.0
425.0
1625.0
View list
6
1110145671
Wongama, A (Achumile)
1
1.0
1
0
0
100.0
1202.1
425.0
1627.1
View list
7
2100156934
Luiters, E (Eva)
1
1.0
1
0
0
100.0
1202.1
425.0
1627.1
View list
8
110084995
Lourens, J (Janco)
1
1.0
1
0
0
100.0
1202.1
425.0
1627.1
View list
9
1110156932
Knoesen, J (James)
1
1.0
1
0
0
100.0
1199.7
425.0
1624.7
View list
10
1100156938
Nherera, E (Eli)
1
1.0
1
0
0
100.0
1199.7
425.0
1624.7
View list
11
1090137581
Musi, S (Seco)
1
1.0
1
0
0
100.0
1200.0
425.0
1625.0
View list
12
109072619
Dangazele, S (Sibabalwe)
1
0.5
0
1
0
50.0
1201.4
0.0
1201.4
View list
13
1090137584
Williams, S (Samuel)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
14
1110154632
Wiehahn, S (Simon Kasper)
1
0.0
0
0
1
0.0
1199.7
-425.0
774.7
View list
15
2090137600
Van Zyl, C (Cornelia Aletta)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
16
210086082
Van Schaik, K (Kayla)
1
0.0
0
0
1
0.0
1201.4
-425.0
776.4
View list
17
1110137370
Spence, B (Brian)
1
0.0
0
0
1
0.0
1199.7
-425.0
774.7
View list
18
1100140763
Prins, S (Stefan)
1
0.0
0
0
1
0.0
1202.1
-425.0
777.1
View list
19
2090132324
Mankomo, B (Bukho)
1
0.0
0
0
1
0.0
1201.4
-425.0
776.4
View list
20
2110156926
Coetzer, J (Jeanne)
1
0.0
0
0
1
0.0
1202.1
-425.0
777.1
View list