Player Page

Koch, Z (Zachary)
Dob: 2007/09/19 (U18)
Gender: Male
Chess SA id: 1070145616
FIDE id:
Region: Johannesburg Metro (GJM)
Citizen: RSA
Title(s):
Last active: 2024/03/09 (111 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
Current Raw rating1352.3
Current Weighted rating1321.7
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1352.3
Current highest rating achieved1352.3
Current floor (min rating allowed)852.3
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)±133.5
Current Raw change used (final)0.0
Projected new Raw rating1352.3
Projected new Weighed rating1218.5
Projected new Weighted performance1228.3
Projected new final Raw rating (if new WP > new Raw)1352.3
Projected new highest rating1352.3
Projected new floor852.3
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1352.3
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 rating1367.9
Current Weighted rating1338.8
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1367.9
Current highest rating achieved1367.9
Current floor (min rating allowed)867.9
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)±130.5
Current Raw change used (final)0.0
Projected new Raw rating1367.9
Projected new Weighed rating1234.5
Projected new Weighted performance1228.3
Projected new final Raw rating (if new WP > new Raw)1367.9
Projected new highest rating1367.9
Projected new floor867.9
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1367.9
Projected effective change (new Official - current Official)=0.0
s
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 rating1200.0
Current Weighted rating1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1200.0
Current highest rating achieved1200.0
Current floor (min rating allowed)700.0
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 rating1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1200.0
Projected new floor700.0
Projected new K-facor36
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 rating1200.0
Current Weighted rating1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1200.0
Current highest rating achieved1200.0
Current floor (min rating allowed)700.0
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 rating1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1200.0
Projected new floor700.0
Projected new K-facor36
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
Did not participate this month.
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
1 JNW Open - Classic - Crawford 2024 (B) 2024/03/09 2024/03/09 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1343.9 1366.1 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
4 JNW Open - Classic - Crawford 2024 (B) 2024/03/09 2024/03/09 Johannesburg Metro (GJM) Standard 60 0.83 5 5 2.0 1343.9 1366.1 Analysis
3 JNW Open - Trinityhouse Little Falls 2023 (C) 2023/06/24 2023/06/24 Johannesburg Metro (GJM) Standard 60 0.83 5 5 5.0 1259.6 1270.3 Analysis
2 JNW Open - Crawford 2023 (C) 2023/03/04 2023/03/04 Johannesburg Metro (GJM) Standard 60 0.83 5 5 4.0 1213.6 1215.6 Analysis
1 JMC 2nd Trials 2022 (D) 2022/08/27 2022/08/27 Johannesburg Metro (GJM) Standard 60 0.83 5 5 3.0 1200.0 1200.0 Analysis
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 5 2 0 3 2.0 40.0 -85.0 1470.4 1385.4
White 2 2 0 0 2.0 100.0 425.0 1350.2 1775.2
Black 3 0 0 3 0.0 0.0 -425.0 1550.6 1125.6
Standard All 5 2 0 3 2.0 40.0 -85.0 1470.4 1385.4
White 2 2 0 0 2.0 100.0 425.0 1350.2 1775.2
Black 3 0 0 3 0.0 0.0 -425.0 1550.6 1125.6
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 20 14 0 6 14.0 70.0 170.0 1299.5 1469.5
White 10 9 0 1 9.0 90.0 340.0 1242.9 1582.9
Black 10 5 0 5 5.0 50.0 0.0 1356.2 1356.2
Standard All 20 14 0 6 14.0 70.0 170.0 1299.5 1469.5
White 10 9 0 1 9.0 90.0 340.0 1242.9 1582.9
Black 10 5 0 5 5.0 50.0 0.0 1356.2 1356.2
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
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 211091693 Steyn, A (Anneke) 1 1.0 1 0 0 100.0 1213.6 425.0 1638.6 View list
2 1150145631 Stelloh, S (Sebastian) 1 1.0 1 0 0 100.0 1259.6 425.0 1684.6 View list
3 2140145625 Shi, P (Peiqi) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
4 1070151814 Ramaila, M (Mahlogonolo) 1 1.0 1 0 0 100.0 1213.6 425.0 1638.6 View list
5 2120143693 Prakash, M (Maisha) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
6 1090151812 Pieters, N (Nicholas) 1 1.0 1 0 0 100.0 1213.6 425.0 1638.6 View list
7 1130145622 Parag Jugmohan, T (Tejas) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
8 1120152458 Chadalavada, B (Bhaarghavarama) 1 1.0 1 0 0 100.0 1343.9 425.0 1768.9 View list
9 2110130015 Botha, C (Cathri Amari) 1 1.0 1 0 0 100.0 1343.9 425.0 1768.9 View list
10 2100131209 Adamson, A (Amani) 1 1.0 1 0 0 100.0 1213.6 425.0 1638.6 View list
11 111092267 D`Alton, E (Ezra) 1 1.0 1 0 0 100.0 1259.6 425.0 1684.6 View list
12 2100100924 Kayiya, A (Anashe) 1 1.0 1 0 0 100.0 1259.6 425.0 1684.6 View list
13 1090147255 Swartz, K (Kent Pierre) 1 1.0 1 0 0 100.0 1259.6 425.0 1684.6 View list
14 1120132213 Williams, J (Joshua) 1 1.0 1 0 0 100.0 1259.6 425.0 1684.6 View list
15 1130143797 Van Den Berg, R (Reuben) 1 0.0 0 0 1 0.0 1200.0 -425.0 775.0 View list
16 1090145626 Sukraj, T (Tasvir) 1 0.0 0 0 1 0.0 1200.0 -425.0 775.0 View list
17 108073207 Horn, E (Evan) 1 0.0 0 0 1 0.0 1343.9 -425.0 918.9 View list
18 1070108325 Cilliers, R (Ruben) 1 0.0 0 0 1 0.0 1213.6 -425.0 788.6 View list
19 173004580 Chikwava, R (Ronald) 1 0.0 0 0 1 0.0 1343.9 -425.0 918.9 View list
20 2980141708 Mcpherson, N (Naleli) 1 0.0 0 0 1 0.0 1343.9 -425.0 918.9 View list