Chess South Africa
Last updated:
Player Page
Home
Chess South Africa
Coba, J (Joshua)
Dob:
2006/02/21 (U20)
Gender:
Male
Chess SA id:
1060153255
FIDE id:
Region:
Buffalo City (EBC)
Citizen:
RSA
Title(s):
Last active:
2024/04/06 (41 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
1193.7
Curent Weighted rating
1187.3
Curent Weighted performance
0.0
Current official/published rating (highest between Raw, WR and WP)
1193.7
Current floor (min rating allowed)
693.7
Current highest rating achieved
1193.7
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)
±167.3
Current Raw change used (final)
0.0
Projected new Raw rating
1193.7
Projected new Weighed rating
1187.5
Projected new Weighted performance
0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)
1193.7
Projected effective change (new Official - current Official)
=0.0
Projected new highest rating
1193.7
Projected new floor
693.7
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
1190.0
Curent Weighted rating
1184.1
Curent Weighted performance
0.0
Current official/published rating (highest between Raw, WR and WP)
1190.0
Current floor (min rating allowed)
690.0
Current highest rating achieved
1190.0
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)
±168.2
Current Raw change used (final)
0.0
Projected new Raw rating
1190.0
Projected new Weighed rating
1184.3
Projected new Weighted performance
0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)
1190.0
Projected effective change (new Official - current Official)
=0.0
Projected new highest rating
1190.0
Projected new floor
690.0
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)
700.0
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
700.0
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
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)
700.0
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
700.0
Projected new K-facor
36
Tournaments
History
Did not participate this month.
#
Tournament
Start
End
Host
Type
Time
Weight
Rns
Gms
Scr
Main
Type
Analysis
1
2nd Buffalo City Chess Trials 2024 (High School B)
2024/04/06
2024/04/06
Buffalo City (EBC)
Standard
60
0.83
5
5
2.5
1184.1
1180.4
Analysis
#
Tournament
Start
End
Host
Type
Time
Weight
Rounds
Games
Score
Main
Type
Analysis
2
2nd Buffalo City Chess Trials 2024 (High School B)
2024/04/06
2024/04/06
Buffalo City (EBC)
Standard
60
0.83
5
5
2.5
1184.1
1180.4
Analysis
1
3rd Vikings Champs 2023 (U18-Adults)
2023/03/23
2023/03/23
Buffalo City (EBC)
Standard
60
0.83
5
4
1.5
1200.0
1200.0
Analysis
Game History
History
Colour
Games
Wins
Draws
Losses
Score
%
Dp
Aor
Perform
Main
All
5
2
1
2
2.5
50.0
0.0
1238.9
1238.9
White
3
2
1
0
2.5
83.3
283.3
1200.0
1483.3
Black
2
0
0
2
0.0
0.0
-425.0
1297.2
872.2
Standard
All
5
2
1
2
2.5
50.0
0.0
1238.9
1238.9
White
3
2
1
0
2.5
83.3
283.3
1200.0
1483.3
Black
2
0
0
2
0.0
0.0
-425.0
1297.2
872.2
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
Colour
Games
Wins
Draws
Losses
Score
%
Dp
Aor
Perform
Main
All
9
3
2
4
4.0
44.4
-47.2
1223.0
1175.8
White
5
2
2
1
3.0
60.0
85.0
1210.2
1295.2
Black
4
1
0
3
1.0
25.0
-212.5
1239.0
1026.5
Standard
All
9
3
2
4
4.0
44.4
-47.2
1223.0
1175.8
White
5
2
2
1
3.0
60.0
85.0
1210.2
1295.2
Black
4
1
0
3
1.0
25.0
-212.5
1239.0
1026.5
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
1060153250
Amankwah, C (Ciara)
1
1.0
1
0
0
100.0
1200.0
425.0
1625.0
View list
2
1100301802
Ngcenge, Q (Qhayiya)
1
1.0
1
0
0
100.0
1184.1
425.0
1609.1
View list
3
1070301797
Matomane, A (Asakhe)
1
1.0
1
0
0
100.0
1184.1
425.0
1609.1
View list
4
1090301794
Ford, S (Simthandile)
1
0.5
0
1
0
50.0
1184.1
0.0
1184.1
View list
5
1060153254
Boateng, M (Merlene)
1
0.5
0
1
0
50.0
1200.0
0.0
1200.0
View list
6
2070150785
Qubeka, S (Simele)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
7
1070150783
One, L (Lihlumile)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
8
1090301804
Nkasela, E (Enawe)
1
0.0
0
0
1
0.0
1184.1
-425.0
759.1
View list
9
2150149005
Mxabo, M (Masonwabe)
1
0.0
0
0
1
0.0
1184.1
-425.0
759.1
View list