Chess South Africa
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Chess South Africa
Gemmell, Z (Zac)
Dob:
2009/09/21 (U16)
Gender:
Male
Chess SA id:
1090116569
FIDE id:
Region:
Ekurhuleni (GE)
Citizen:
RSA
Title(s):
Last active:
2024/04/06 (36 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
1304.8
Curent Weighted rating
1326.8
Curent Weighted performance
1252.7
Current official/published rating (highest between Raw, WR and WP)
1326.8
Current floor (min rating allowed)
955.2
Current highest rating achieved
1455.2
Current K-factor
32
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)
±142.8
Current Raw change used (final)
0.0
Projected new Raw rating
1304.8
Projected new Weighed rating
1327.3
Projected new Weighted performance
1252.7
Projected new official/published rating (highest between new Raw, new WR and new WP)
1327.3
Projected effective change (new Official - current Official)
+0.5
Projected new highest rating
1455.2
Projected new floor
955.2
Projected new K-facor
32
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
1297.6
Curent Weighted rating
1324.4
Curent Weighted performance
1209.1
Current official/published rating (highest between Raw, WR and WP)
1324.4
Current floor (min rating allowed)
954.4
Current highest rating achieved
1454.4
Current K-factor
32
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)
±144.3
Current Raw change used (final)
0.0
Projected new Raw rating
1297.6
Projected new Weighed rating
1324.4
Projected new Weighted performance
1209.1
Projected new official/published rating (highest between new Raw, new WR and new WP)
1324.4
Projected effective change (new Official - current Official)
-0.0
Projected new highest rating
1454.4
Projected new floor
954.4
Projected new K-facor
32
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
1192.8
Curent Weighted rating
1170.7
Curent Weighted performance
1132.8
Current official/published rating (highest between Raw, WR and WP)
1192.8
Current floor (min rating allowed)
692.8
Current highest rating achieved
1192.8
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)
±167.5
Current Raw change used (final)
0.0
Projected new Raw rating
1192.8
Projected new Weighed rating
1172.4
Projected new Weighted performance
1132.8
Projected new official/published rating (highest between new Raw, new WR and new WP)
1192.8
Projected effective change (new Official - current Official)
=0.0
Projected new highest rating
1192.8
Projected new floor
692.8
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)
692.8
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
692.8
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
5
Ekurhuleni Open 2024 (B)
2024/04/06
2024/04/06
Ekurhuleni (GE)
Standard
60
0.83
5
3
0.0
1344.1
1345.0
Analysis
4
Ekurhuleni North Chess Club Open Tournament 2024 (C)
2024/03/02
2024/03/02
Ehlanzeni (MEN)
Rapid
30
0.60
7
7
4.0
1353.1
1158.0
Analysis
3
Chess Power House 1st Rapid 2024 (A)
2024/02/24
2024/02/24
Johannesburg Metro (GJM)
Rapid
20
0.47
5
5
4.0
1349.4
1173.2
Analysis
2
Gear Up Mzansi Rapid 2024 (Intermediate)
2024/02/17
2024/02/17
Johannesburg Metro (GJM)
Rapid
35
0.66
5
4
1.0
1349.4
1173.2
Analysis
1
2024 Gauteng Inter-Region Chess Championship (U16A)
2024/01/13
2024/01/14
Tshwane (GTP)
Standard
90
0.94
5
5
3.5
1305.2
1296.0
Analysis
#
Tournament
Start
End
Host
Type
Time
Weight
Rounds
Games
Score
Main
Type
Analysis
21
Ekurhuleni Open 2024 (B)
2024/04/06
2024/04/06
Ekurhuleni (GE)
Standard
60
0.83
5
3
0.0
1344.1
1345.0
Analysis
20
Ekurhuleni North Chess Club Open Tournament 2024 (C)
2024/03/02
2024/03/02
Ehlanzeni (MEN)
Rapid
30
0.60
7
7
4.0
1353.1
1158.0
Analysis
19
Chess Power House 1st Rapid 2024 (A)
2024/02/24
2024/02/24
Johannesburg Metro (GJM)
Rapid
20
0.47
5
5
4.0
1349.4
1173.2
Analysis
18
Gear Up Mzansi Rapid 2024 (Intermediate)
2024/02/17
2024/02/17
Johannesburg Metro (GJM)
Rapid
35
0.66
5
4
1.0
1349.4
1173.2
Analysis
17
2024 Gauteng Inter-Region Chess Championship (U16A)
2024/01/13
2024/01/14
Tshwane (GTP)
Standard
90
0.94
5
5
3.5
1305.2
1296.0
Analysis
16
Ekurhuleni Chess Spring Tournament 2023 (C)
2023/09/23
2023/09/23
Ekurhuleni (GE)
Standard
60
0.83
5
5
1.0
1349.8
1350.7
Analysis
15
Chess Power House 2023 (B)
2023/08/19
2023/08/19
Johannesburg Metro (GJM)
Standard
90
0.94
5
5
3.0
1340.8
1343.3
Analysis
14
Eureka Open 2023 (D)
2023/07/29
2023/07/29
Sedibeng (GSV)
Standard
60
0.83
5
5
2.0
1383.3
1397.1
Analysis
13
Boksburg Chess Club Rapid 2023
2023/06/20
2023/06/20
Ekurhuleni (GE)
Rapid
30
0.60
5
4
2.0
1455.2
1148.0
Analysis
12
Ekurhuleni Chess Trial 3 2023 (U16)
2023/06/17
2023/06/17
Ekurhuleni (GE)
Standard
60
0.83
5
5
2.0
1455.2
1454.4
Analysis
11
Primrose Rapid 2023 (High School)
2023/06/10
2023/06/10
Ekurhuleni (GE)
Rapid
20
0.47
5
5
2.0
1455.2
1148.0
Analysis
10
Gauteng Open Arnold Classic 2023 (C)
2023/05/20
2023/05/20
Tshwane (GTP)
Standard
60
0.83
5
5
3.0
1451.2
1449.6
Analysis
9
Ekurhuleni Trials 2 2023 (U16)
2023/04/22
2023/04/22
Ekurhuleni (GE)
Standard
60
0.83
5
5
3.5
1440.3
1438.1
Analysis
8
Ekhuruleni Chess Trials 1 2023 (U16)
2023/03/25
2023/03/25
Ekurhuleni (GE)
Standard
60
0.83
5
5
3.0
1409.0
1384.5
Analysis
7
2023 Afrikaans Hoër Seunskool Open Chess Tournament (B)
2023/03/04
2023/03/04
Tshwane (GTP)
Standard
60
0.83
5
5
3.0
1409.0
1384.5
Analysis
6
Heidelberg Open 2023 (C)
2023/02/04
2023/02/04
Sedibeng (GSV)
Standard
60
0.83
5
5
5.0
1272.9
1306.0
Analysis
5
Laerkool Midvaal Chess Open 2023 (C)
2023/01/28
2023/01/28
Sedibeng (GSV)
Standard
61
0.83
5
5
4.0
1152.6
1173.2
Analysis
4
Harties Wolf Pack 2023 (Knights)
2023/01/21
2023/01/21
Bojanala Platina (NBR)
Standard
62
0.84
5
5
4.0
1152.6
1173.2
Analysis
3
CPH Chess Clubs Challenge 2022 (Primary Schools)
2022/11/12
2022/11/12
Johannesburg Metro (GJM)
Rapid
20
0.47
6
5
1.5
1164.4
1181.6
Analysis
2
Ekurhuleni Soncini Playoffs 2022 (Boys)
2022/09/24
2022/09/24
Ekurhuleni (GE)
Rapid
30
0.60
5
5
2.0
1178.8
1200.0
Analysis
1
2
Game History
History
Colour
Games
Wins
Draws
Losses
Score
%
Dp
Aor
Perform
Main
All
24
12
1
11
12.5
52.1
17.7
1307.0
1324.7
White
12
8
0
4
8.0
66.7
141.7
1254.4
1396.1
Black
12
4
1
7
4.5
37.5
-106.3
1359.6
1253.3
Standard
All
8
3
1
4
3.5
43.8
-53.1
1362.8
1309.7
White
3
2
0
1
2.0
66.7
141.7
1300.3
1441.9
Black
5
1
1
3
1.5
30.0
-170.0
1400.3
1230.3
Rapid
All
16
9
0
7
9.0
56.3
53.1
1279.1
1332.3
White
9
6
0
3
6.0
66.7
141.7
1239.2
1380.8
Black
7
3
0
4
3.0
42.9
-60.7
1330.5
1269.8
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
99
51
5
43
53.5
54.0
34.3
1281.2
1315.5
White
47
26
2
19
27.0
57.4
63.3
1266.1
1329.4
Black
52
25
3
24
26.5
51.0
8.2
1294.8
1303.0
Standard
All
64
35
4
25
37.0
57.8
66.4
1286.4
1352.9
White
30
18
2
10
19.0
63.3
113.3
1268.1
1381.4
Black
34
17
2
15
18.0
52.9
25.0
1302.6
1327.6
Rapid
All
35
16
1
18
16.5
47.1
-24.3
1271.6
1247.3
White
17
8
0
9
8.0
47.1
-25.0
1262.7
1237.7
Black
18
8
1
9
8.5
47.2
-23.6
1280.0
1256.4
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
1090114761
Saunders, W (Wayde)
3
1.5
1
1
1
50.0
1416.2
0.0
1416.2
View list
2
1090111233
Farrell, J (Jonty)
2
2.0
2
0
0
100.0
1228.9
425.0
1653.9
View list
3
1090153005
Kutukesidi, R (Raphael)
2
1.0
1
0
1
50.0
1432.1
0.0
1432.1
View list
4
109080845
Tsai, R (Ray)
2
1.0
1
0
1
50.0
1349.4
0.0
1349.4
View list
5
1100151738
Combrink, J (Juan-Louis)
2
0.0
0
0
2
0.0
1402.3
-425.0
977.3
View list
6
1090135389
Horn, C (Cade)
2
0.0
0
0
2
0.0
1432.1
-425.0
1007.1
View list
7
1090119738
Shen Yu, F (Frank)
2
0.0
0
0
2
0.0
1445.8
-425.0
1020.8
View list
8
1130140205
Wessels, T (Theodore)
2
0.0
0
0
2
0.0
1400.3
-425.0
975.3
View list
9
1060148720
Erasmus, E (Evan)
1
1.0
1
0
0
100.0
1152.6
425.0
1577.6
View list
10
1120139655
Du Toit, C (Christiaan)
1
1.0
1
0
0
100.0
1272.9
425.0
1697.9
View list
11
2080113256
Ferreira, M (Marquerite)
1
1.0
1
0
0
100.0
1440.3
425.0
1865.3
View list
12
108088042
Crawford, J (Jared)
1
1.0
1
0
0
100.0
1409.0
425.0
1834.0
View list
13
207078376
Goede, K (Kari)
1
1.0
1
0
0
100.0
1409.0
425.0
1834.0
View list
14
208066161
Bhika, J (Jyotikka)
1
1.0
1
0
0
100.0
1440.3
425.0
1865.3
View list
15
1090130895
Arokiam, E (Ethan)
1
1.0
1
0
0
100.0
1349.4
425.0
1774.4
View list
16
1080113577
Arlow, JF (Jonathan)
1
1.0
1
0
0
100.0
1305.2
425.0
1730.2
View list
17
2110138272
Campher, H (Hannah)
1
1.0
1
0
0
100.0
1272.9
425.0
1697.9
View list
18
1120136511
Brand, H (Henko)
1
1.0
1
0
0
100.0
1272.9
425.0
1697.9
View list
19
1100104441
Griffin, C (Caleb Trevor)
1
1.0
1
0
0
100.0
1152.6
425.0
1577.6
View list
20
109085045
Hanekom, J (Johan)
1
1.0
1
0
0
100.0
1152.6
425.0
1577.6
View list