Chess South Africa
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Chess South Africa
Li, Z (Zhengfei)
Dob:
2009/11/01 (U16)
Gender:
Male
Chess SA id:
1090099818
FIDE id:
Region:
Johannesburg Metro (GJM)
Citizen:
RSA
Title(s):
Last active:
2024/04/06 (22 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
1682.8
Curent Weighted rating
1672.2
Curent Weighted performance
1567.5
Current official/published rating (highest between Raw, WR and WP)
1682.8
Current floor (min rating allowed)
1219.9
Current highest rating achieved
1719.9
Current K-factor
28
Games played this month
5
Score (S)
3.0
Expected score (We)
2.60
Difference (S-We)
0.40
Current Raw change (no limits, including tournament time weight)
9.3
Current min/max change allowed (with limits)
±83.3
Current Raw change used (final)
9.3
Projected new Raw rating
1692.1
Projected new Weighed rating
1677.3
Projected new Weighted performance
1567.5
Projected new official/published rating (highest between new Raw, new WR and new WP)
1692.1
Projected effective change (new Official - current Official)
+9.3
Projected new highest rating
1719.9
Projected new floor
1219.9
Projected new K-facor
28
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
1670.8
Curent Weighted rating
1658.2
Curent Weighted performance
1556.4
Current official/published rating (highest between Raw, WR and WP)
1670.8
Current floor (min rating allowed)
1192.7
Current highest rating achieved
1692.7
Current K-factor
28
Games played this month
5
Score (S)
3.0
Expected score (We)
2.47
Difference (S-We)
0.53
Current Raw change (no limits, including tournament time weight)
14.8
Current min/max change allowed (with limits)
±84.8
Current Raw change used (final)
14.8
Projected new Raw rating
1685.6
Projected new Weighed rating
1663.8
Projected new Weighted performance
1556.4
Projected new official/published rating (highest between new Raw, new WR and new WP)
1685.6
Projected effective change (new Official - current Official)
+14.8
Projected new highest rating
1692.7
Projected new floor
1192.7
Projected new K-facor
28
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
1343.9
Curent Weighted rating
1301.1
Curent Weighted performance
0.0
Current official/published rating (highest between Raw, WR and WP)
1343.9
Current floor (min rating allowed)
843.9
Current highest rating achieved
1343.9
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)
±135.1
Current Raw change used (final)
0.0
Projected new Raw rating
1343.9
Projected new Weighed rating
1306.0
Projected new Weighted performance
0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)
1343.9
Projected effective change (new Official - current Official)
=0.0
Projected new highest rating
1343.9
Projected new floor
843.9
Projected new K-facor
36
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
1371.8
Curent Weighted rating
1303.7
Curent Weighted performance
0.0
Current official/published rating (highest between Raw, WR and WP)
1371.8
Current floor (min rating allowed)
843.9
Current highest rating achieved
1371.8
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)
±129.8
Current Raw change used (final)
0.0
Projected new Raw rating
1371.8
Projected new Weighed rating
1311.1
Projected new Weighted performance
0.0
Projected new official/published rating (highest between new Raw, new WR and new WP)
1371.8
Projected effective change (new Official - current Official)
=0.0
Projected new highest rating
1371.8
Projected new floor
843.9
Projected new K-facor
36
Tournaments
History
Tournament:
2024 KSNG CHess Academy Open Tournament (A)
Start:
2024/04/06
End:
2024/04/06
Host:
GTP
Type:
Standard
Time:
60
Time weight:
0.83
Rounds:
5
Games:
5
Score:
3.0
Main rating:
1682.8
Rating gain/loss:
9.3
Type rating:
1670.8
Rating gain/loss:
14.8
Analysis
#
Tournament
Start
End
Host
Type
Time
Weight
Rns
Gms
Scr
Main
Type
Analysis
3
2024 KSNG CHess Academy Open Tournament (A)
2024/04/06
2024/04/06
Tshwane (GTP)
Standard
60
0.83
5
5
3.0
1682.8
1670.8
Analysis
2
Wanderers Blitz Tournament 2024
2024/03/23
2024/03/23
Johannesburg Metro (GJM)
Blitz
8
0.25
9
9
5.5
1683.9
1308.8
Analysis
1
2024 Gauteng Inter-Region Chess Championship (U16A)
2024/01/13
2024/01/14
Tshwane (GTP)
Standard
90
0.94
5
5
4.0
1672.3
1654.6
Analysis
#
Tournament
Start
End
Host
Type
Time
Weight
Rounds
Games
Score
Main
Type
Analysis
18
2024 KSNG CHess Academy Open Tournament (A)
2024/04/06
2024/04/06
Tshwane (GTP)
Standard
60
0.83
5
5
3.0
1682.8
1670.8
Analysis
17
Wanderers Blitz Tournament 2024
2024/03/23
2024/03/23
Johannesburg Metro (GJM)
Blitz
8
0.25
9
9
5.5
1683.9
1308.8
Analysis
16
2024 Gauteng Inter-Region Chess Championship (U16A)
2024/01/13
2024/01/14
Tshwane (GTP)
Standard
90
0.94
5
5
4.0
1672.3
1654.6
Analysis
15
World Youth Chess Championship 2023
2023/11/13
2023/11/24
FIDE (FID)
Standard
150
1.00
11
11
4.5
1719.9
1692.7
Analysis
14
Mzansi Bryanston Rapid 2023 (Advanced)
2023/10/07
2023/10/07
Johannesburg Metro (GJM)
Rapid
25
0.54
5
5
4.0
1703.7
1260.4
Analysis
13
2023 South African Junior Closed Chess Championships (U14 Open)
2023/03/31
2023/04/04
Chess South Africa (CSA)
Standard
120
1.00
9
9
8.0
1641.3
1627.2
Analysis
12
2022 South Africa Junior Blitz Chess Championships (U14)
2022/12/05
2022/12/05
4 Knights (4K)
Blitz
5
0.18
7
7
7.0
1615.8
1200.0
Analysis
11
2022 South African Junior Team Chess Championships (U14 Open)
2022/12/04
2022/12/08
4 Knights (4K)
Standard
120
1.00
7
7
5.0
1615.8
1610.4
Analysis
10
JMC 3rd Trials 2022 (B)
2022/09/11
2022/09/11
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
5.0
1507.3
1513.1
Analysis
9
Mzansi Spring Open 2022 (Advanced)
2022/09/03
2022/09/03
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
4.0
1507.3
1513.1
Analysis
8
JMC 2nd Trials 2022 (B)
2022/08/27
2022/08/27
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
3.5
1505.2
1450.0
Analysis
7
JMC Womens Day 2022 (FIDE Open)
2022/08/06
2022/08/09
Johannesburg Metro (GJM)
Standard
120
1.00
6
6
2.0
1505.2
1450.0
Analysis
6
JMC Trials 1 - Laerskool Fontainebleau 2022 (U14)
2022/07/24
2022/07/24
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
4.0
1333.2
1309.6
Analysis
5
JNW Helpmekaar 2022 (Rookies)
2022/07/09
2022/07/09
Johannesburg Metro (GJM)
Standard
60
0.83
5
5
5.0
1333.2
1309.6
Analysis
4
Chess Power House Rapid 2022 (B)
2022/06/11
2022/06/11
Johannesburg Metro (GJM)
Rapid
20
0.47
5
5
4.5
1303.8
1200.0
Analysis
3
Mzansi Open 2022 (Young Masters)
2022/04/30
2022/05/01
Johannesburg Metro (GJM)
Standard
90
0.94
6
6
5.0
1219.9
1221.0
Analysis
2
2018 Capablanca Swiss (D)
2018/04/27
2018/04/27
Tshwane (GTP)
Standard
90
0.94
5
5
4.0
1216.9
1219.6
Analysis
1
2018 Crawford Open (E)
2018/03/24
2018/03/24
Tshwane (GTP)
Standard
60
0.83
5
5
4.0
1200.0
1200.0
Analysis
Game History
History
Colour
Games
Wins
Draws
Losses
Score
%
Dp
Aor
Perform
Main
All
19
11
3
5
12.5
65.8
134.2
1573.2
1707.4
White
8
7
0
1
7.0
87.5
318.8
1446.9
1765.6
Black
11
4
3
4
5.5
50.0
0.0
1665.0
1665.0
Standard
All
10
6
2
2
7.0
70.0
170.0
1570.4
1740.4
White
4
3
0
1
3.0
75.0
212.5
1622.8
1835.3
Black
6
3
2
1
4.0
66.7
141.7
1535.5
1677.2
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
9
5
1
3
5.5
61.1
94.4
1576.2
1670.7
White
4
4
0
0
4.0
100.0
425.0
1270.9
1695.9
Black
5
1
1
3
1.5
30.0
-170.0
1820.5
1650.5
Colour
Games
Wins
Draws
Losses
Score
%
Dp
Aor
Perform
Main
All
110
77
10
23
82.0
74.5
208.6
1424.3
1633.0
White
52
39
2
11
40.0
76.9
228.8
1428.1
1657.0
Black
58
38
8
12
42.0
72.4
190.5
1421.0
1611.5
Standard
All
84
57
8
19
61.0
72.6
192.3
1401.4
1593.7
White
40
27
2
11
28.0
70.0
170.0
1453.0
1623.0
Black
44
30
6
8
33.0
75.0
212.5
1354.5
1567.0
Rapid
All
10
8
1
1
8.5
85.0
297.5
1445.6
1743.1
White
5
5
0
0
5.0
100.0
425.0
1295.9
1720.9
Black
5
3
1
1
3.5
70.0
170.0
1595.3
1765.3
Blitz
All
16
12
1
3
12.5
78.1
239.1
1531.5
1770.5
White
7
7
0
0
7.0
100.0
425.0
1380.3
1805.3
Black
9
5
1
3
5.5
61.1
94.4
1649.0
1743.5
Top 20 opponents most often played
#
Chess SA id
Name
Games
Score
Wins
Draws
Losses
%
Aor
Dp
Perform
View
1
1100117290
Weng, Y (Yu Bo (David))
4
3.0
3
0
1
75.0
1611.8
212.5
1824.3
View list
2
109069454
Sathish, A (Abinavah)
4
1.5
1
1
2
37.5
1594.5
-106.3
1488.3
View list
3
109083250
Byliefeldt, L (Leroux)
3
3.0
3
0
0
100.0
1624.3
425.0
2049.3
View list
4
1090105698
Naicker, GC (Gabriel Christian)
3
3.0
3
0
0
100.0
1449.3
425.0
1874.3
View list
5
109092824
Labuschagne, I (Ivan)
2
2.0
2
0
0
100.0
1644.0
425.0
2069.1
View list
6
211085191
Naidoo, K (Kajol)
2
2.0
2
0
0
100.0
1506.3
425.0
1931.3
View list
7
1140135557
Thorulsley, K (Kairaav)
2
2.0
2
0
0
100.0
1605.5
425.0
2030.5
View list
8
109086362
Yang, A (Alex)
2
2.0
2
0
0
100.0
1656.8
425.0
2081.8
View list
9
1970104047
Maponya, K (Khutso)
2
1.0
1
0
1
50.0
1595.6
0.0
1595.6
View list
10
109081098
Naidoo, K (Kirthan)
2
0.5
0
1
1
25.0
1318.5
-212.5
1106.0
View list
11
2040143685
Bloem, S (Savanna)
1
1.0
1
0
0
100.0
1333.2
425.0
1758.2
View list
12
1110097852
Bezuidenhout, D (Dawid)
1
1.0
1
0
0
100.0
1507.3
425.0
1932.3
View list
13
1080109892
Balassis, P (Petro)
1
1.0
1
0
0
100.0
1219.9
425.0
1644.9
View list
14
1130130727
Badenhorst, M (Matthew)
1
1.0
1
0
0
100.0
1219.9
425.0
1644.9
View list
15
1100133759
Brest, S (Saul)
1
1.0
1
0
0
100.0
1303.8
425.0
1728.8
View list
16
111092267
D`Alton, E (Ezra)
1
1.0
1
0
0
100.0
1333.2
425.0
1758.2
View list
17
1090106163
Cressey, RJ (Ryelee Jordan)
1
1.0
1
0
0
100.0
1641.3
425.0
2066.3
View list
18
110088674
Chang, S (Samuel)
1
1.0
1
0
0
100.0
1615.8
425.0
2040.8
View list
19
1930159004
Cawthorn, W (William)
1
1.0
1
0
0
100.0
1683.9
425.0
2108.9
View list
20
1100117908
Diale, A (Aobakwe)
1
1.0
1
0
0
100.0
1615.8
425.0
2040.8
View list