Chess South Africa
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Chess South Africa
Bostaander, J (Johnathan)
Dob:
2008/01/20 (U18)
Gender:
Male
Chess SA id:
1080142219
FIDE id:
Region:
ZF Mgcawu (NZF)
Citizen:
RSA
Title(s):
Last active:
2022/05/28 (911 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
1158.5
Current Weighted rating
1158.5
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)
1158.5
Current highest rating achieved
1158.5
Current floor (min rating allowed)
658.5
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)
±175.9
Current Raw change used (final)
0.0
Projected new Raw rating
1158.5
Projected new Weighed rating
1065.8
Projected new Weighted performance
224.8
Projected new final Raw rating (if new WP > new Raw)
1158.5
Projected new highest rating
1158.5
Projected new floor
658.5
Projected new K-facor
40
Projected new official/published rating (highest between new Raw, new WR and new WP)
1158.5
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
1149.2
Current Weighted rating
1149.2
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)
1149.2
Current highest rating achieved
1149.2
Current floor (min rating allowed)
649.2
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)
±178.3
Current Raw change used (final)
0.0
Projected new Raw rating
1149.2
Projected new Weighed rating
1057.3
Projected new Weighted performance
224.8
Projected new final Raw rating (if new WP > new Raw)
1149.2
Projected new highest rating
1149.2
Projected new floor
649.2
Projected new K-facor
40
Projected new official/published rating (highest between new Raw, new WR and new WP)
1149.2
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.
Did not participate this year.
#
Tournament
Start
End
Host
Type
Time
Weight
Rounds
Games
Score
Main
Type
Analysis
1
ZFM Schools Trials 2022 (U15 Boys)
2022/05/28
2022/05/28
ZF Mgcawu (NZF)
Standard
60
0.83
5
5
1.5
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
5
1
1
3
1.5
30.0
-170.0
1150.2
980.2
White
2
0
1
1
0.5
25.0
-212.5
1200.0
987.5
Black
3
1
0
2
1.0
33.3
-141.7
1117.0
975.4
Standard
All
5
1
1
3
1.5
30.0
-170.0
1150.2
980.2
White
2
0
1
1
0.5
25.0
-212.5
1200.0
987.5
Black
3
1
0
2
1.0
33.3
-141.7
1117.0
975.4
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
1080142227
Majiedt, S (Segio Alessandro)
1
1.0
1
0
0
100.0
1200.0
425.0
1625.0
View list
2
1080142231
Poffader, M (Marlon)
1
0.5
0
1
0
50.0
1200.0
0.0
1200.0
View list
3
107089446
Visagie, L (Luchiano)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
4
1080142232
Poffader, R (Recachalus)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
5
1080142220
Coetzee, E (Enrique)
1
0.0
0
0
1
0.0
1200.0
-425.0
775.0
View list
