Player Page

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
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 rating1204.7
Curent Weighted rating1203.3
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1204.7
Current floor (min rating allowed)704.7
Current highest rating achieved1204.7
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)±164.7
Current Raw change used (final)0.0
Projected new Raw rating1204.7
Projected new Weighed rating1203.5
Projected new Weighted performance0.0
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 rating1204.7
Projected new floor704.7
Projected new K-facor36
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 rating1195.2
Curent Weighted rating1195.2
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1195.2
Current floor (min rating allowed)695.2
Current highest rating achieved1195.2
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)±167.0
Current Raw change used (final)0.0
Projected new Raw rating1195.2
Projected new Weighed rating1195.2
Projected new Weighted performance0.0
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 rating1195.2
Projected new floor695.2
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 rating1180.4
Curent Weighted rating1179.2
Curent Weighted performance0.0
Current official/published rating (highest between Raw, WR and WP)1180.4
Current floor (min rating allowed)681.6
Current highest rating achieved1181.6
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)±170.5
Current Raw change used (final)0.0
Projected new Raw rating1180.4
Projected new Weighed rating1179.4
Projected new Weighted performance0.0
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 rating1181.6
Projected new floor681.6
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)681.6
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 floor681.6
Projected new K-facor36
Tournaments
Did not participate this month.
Did not participate this year.
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
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
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 idNameGamesScoreWinsDrawsLosses%AorDpPerformView
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