Player Page

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
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 rating1304.8
Curent Weighted rating1326.8
Curent Weighted performance1252.7
Current official/published rating (highest between Raw, WR and WP)1326.8
Current floor (min rating allowed)955.2
Current highest rating achieved1455.2
Current K-factor32
Games played this month0
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 rating1304.8
Projected new Weighed rating1327.3
Projected new Weighted performance1252.7
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 rating1455.2
Projected new floor955.2
Projected new K-facor32
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 rating1297.6
Curent Weighted rating1324.4
Curent Weighted performance1209.1
Current official/published rating (highest between Raw, WR and WP)1324.4
Current floor (min rating allowed)954.4
Current highest rating achieved1454.4
Current K-factor32
Games played this month0
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 rating1297.6
Projected new Weighed rating1324.4
Projected new Weighted performance1209.1
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 rating1454.4
Projected new floor954.4
Projected new K-facor32
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 rating1192.8
Curent Weighted rating1170.7
Curent Weighted performance1132.8
Current official/published rating (highest between Raw, WR and WP)1192.8
Current floor (min rating allowed)692.8
Current highest rating achieved1192.8
Current K-factor40
Games played this month0
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 rating1192.8
Projected new Weighed rating1172.4
Projected new Weighted performance1132.8
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 rating1192.8
Projected new floor692.8
Projected new K-facor40
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 rating1200.0
Curent Weighted rating1200.0
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1200.0
Current floor (min rating allowed)692.8
Current highest rating achieved1200.0
Current K-factor36
Games played this month0
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 rating1200.0
Projected new Weighed rating1200.0
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 rating1200.0
Projected new floor692.8
Projected new K-facor36
Tournaments
Did not participate this month.
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
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
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
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
12
Game 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 idNameGamesScoreWinsDrawsLosses%AorDpPerformView
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