PLAYER PAGE

Personal

Weng, Y (Yu Bo (David))

Chess SA id

1100117290

FIDE id

?

Date of birth

2010-01-05 (U16)

Gender

Male

Region

Ethekwini (KED)

Citizen

RSA

Titles

Chess SA registered

No

Last active game

2025-09-27

Personal details last changed

2025-07-26

Junior GPX Games

42.7

Junior GPX Points

1638

Item Main Standard Rapid Blitz
Rating 1785.6 1771.3 1472.6 1352.2
Raw rating 1785.6 1771.3 1472.6 1352.2
Weighted rating 1709.9 1710.1 1354.6 1304
Weighted performance 1716.3 1705.8 1360.6 0
Floor 1285.6 1283 972.6 852.2
K-factor 28 28 32 36
Min/Max rating change allowed 72 73.5 112.4 133.5
Highest rating 1785.6
2025-09-30
1783
2025-08-01
1472.6
2025-09-30
1371.6
2023-07-01
Highest raw rating 1785.6
2025-09-30
1783
2025-08-01
1472.6
2025-09-30
1352.2
2025-08-01
Highest weighted rating 1709.9
2025-09-30
1710.1
2025-09-30
1354.6
2025-09-30
1294.6
2025-08-01
Highest weighted performance 1744.7
2025-08-01
1761.6
2024-08-01
1388.4
2022-09-01
1371.6
2023-07-01

Prediction
Item Main Standard Rapid Blitz
Rating change 0 0 0 0
New rating 1785.6 1771.3 1472.6 1352.2
Analysis
Rating 1785.6 1771.3 1472.6 1352.2
Raw rating 1785.6 1771.3 1472.6 1352.2
Weighted rating 1709.9 1710.1 1354.6
Weighted performance 1716.3 1705.8 1360.6
K-factor 28 28 32 36
Floor 1285.6 1283 972.6 852.2
Max/Min rating change allowed 72 73.5 112.4 133.5
Games 0 0 0 0
Score 0 0 0 0
Expected score 0 0 0 0
Score-Expected 0 0 0 0
Temp raw +/- 0 0 0 0
Final raw +/- 0 0 0 0
New raw rating 1785.6 1771.3 1472.6 1352.2
New weighted rating 1717.2 1716 1365.6 1308.4
New weighted performance 1715.7 1705.2 1360 0
Temp new rating 1785.6 1771.3 1472.6 1352.2
Temp new rating +/- 0 0 0 0
Final new rating +/- 0 0 0 0
New rating 1785.6 1771.3 1472.6 1352.2
New K-factor 28 28 32 36
New floor 1285.6 1283 972.6 852.2

Item Main Standard Rapid Blitz
0 0 0 0
48 34 6 8
57 45 12 0
48 41 0 7
82 65 10 7
0 0 0 0
History 239 189 28 22

Games since
Main
112
Standard
86
Rapid
18
Blitz
8
Gender Male
Age group U16
Region Ethekwini (KED)
Province KwaZulu Natal (KZ)
Main
RSA Province Region
Overall 173 8 7
Male 167 8 7
U16 14 1 1
U16 Male 13 1 1
Standard
RSA Province Region
Overall 183 9 8
Male 174 9 8
U16 15 1 1
U16 Male 14 1 1
Rapid
RSA Province Region
Overall -1 -1 -1
Male -1 -1 -1
U16 -1 -1 -1
U16 Male -1 -1 -1
Blitz
RSA Province Region
Overall -1 -1 -1
Male -1 -1 -1
U16 -1 -1 -1
U16 Male -1 -1 -1

Games Score % Dp AvgOpp Performance
Main 0 0 0 0 0 0
Standard 0 0 0 0 0 0
Rapid 0 0 0 0 0 0
Blitz 0 0 0 0 0 0
Games Score % Dp AvgOpp Performance
Main 48 34 70.83 177.1 1613.5 1790.6
Standard 34 24 70.59 175 1610.4 1785.4
Rapid 6 6 100 425 1439.5 1864.5
Blitz 8 4 50 0 1757.2 1757.2
History
Games Score % Dp AvgOpp Performance
Main 239 163 68.2 154.7 1474.8 1629.5
Standard 189 128 67.72 150.7 1469.1 1619.7
Rapid 28 22 78.57 242.9 1438.4 1681.3
Blitz 22 13 59.09 77.3 1570.5 1647.8

Date Main Standard Rapid Blitz
2025-09-30 1785.6 1771.3 1472.6 1352.2
2025-09-01 1782.7 1783 1355.6 1352.2
2025-08-01 1782.7 1783 1355.6 1352.2
2025-07-01 1715.4 1714.3 1355.6 1289.6
2025-06-01 1715.4 1714.3 1355.6 1289.6
2025-05-01 1690.7 1692.2 1355.6 1289.6
2025-04-01 1690.7 1692.2 1355.6 1289.6
2025-03-01 1690.7 1692.2 1355.6 1289.6
2025-02-01 1690.7 1692.2 1355.6 1289.6
2025-01-01 1690.7 1692.2 1355.6 1289.6
2024-12-01 1651.5 1649.9 1355.6 1289.6
2024-11-01 1651.5 1649.9 1355.6 1289.6
2024-10-01 1651.5 1649.9 1355.6 1289.6
2024-09-01 1691 1700 1355.6 1289.6
2024-08-01 1685 1680.4 1339 1289.6
2024-07-01 1698.6 1704.2 1290.4 1289.6
2024-06-01 1698.1 1704.8 1290.4 1289.6
2024-08-01 1698.1 1704.8 1290.4 1289.6
2024-04-01 1689 1695.6 1290.4 1289.6
2024-03-01 1689 1695.6 1290.4 1289.6
2024-02-01 1689 1695.6 1290.4 1289.6
2024-01-01 1652.2 1658.4 1290.4 1289.6
2023-12-01 1652.2 1658.4 1290.4 1289.6
2023-11-01 1652.2 1658.4 1290.4 1289.6

Comming soon.

Tournaments

No tournaments found.
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
1 2025 Umhlanga Heritage Open (Open) 2025-09-27 2025-09-27 Standard Ethekwini (KED) 5 4 2 Yes Analysis
2 2025 KZN Provincial Trials (U16) 2025-09-06 2025-09-06 Rapid Ethekwini (KED) 6 6 6 Yes Analysis
3 2025 ECA 2nd Youth Trials (U16) 2025-07-26 2025-07-27 Standard Ethekwini (KED) 6 6 5 Yes Analysis
4 2025 Umhlanga Youth Open (High School) 2025-07-12 2025-07-13 Standard Ethekwini (KED) 6 6 5.5 Yes Analysis
5 South African Open 2025 (B) 2025-06-28 2025-07-05 Standard Johannesburg Metro (GJM) 11 11 7.5 Yes Analysis
6 South African Open 2025 (Blitz) 2025-07-02 2025-07-02 Blitz Johannesburg Metro (GJM) 9 8 4 Yes Analysis
7 2025 KZN Open (A) 2025-05-02 2025-05-04 Standard Ethekwini (KED) 7 7 4 Yes Analysis
Last 500 tournaments since 01 January 2018
# Tournament Start End Type Host Rounds Games Score Cfr Analysis
1 2025 Umhlanga Heritage Open (Open) 2025-09-27 2025-09-27 Standard Ethekwini (KED) 5 4 2 Yes Analysis
2 2025 KZN Provincial Trials (U16) 2025-09-06 2025-09-06 Rapid Ethekwini (KED) 6 6 6 Yes Analysis
3 2025 ECA 2nd Youth Trials (U16) 2025-07-26 2025-07-27 Standard Ethekwini (KED) 6 6 5 Yes Analysis
4 2025 Umhlanga Youth Open (High School) 2025-07-12 2025-07-13 Standard Ethekwini (KED) 6 6 5.5 Yes Analysis
5 South African Open 2025 (B) 2025-06-28 2025-07-05 Standard Johannesburg Metro (GJM) 11 11 7.5 Yes Analysis
6 South African Open 2025 (Blitz) 2025-07-02 2025-07-02 Blitz Johannesburg Metro (GJM) 9 8 4 Yes Analysis
7 2025 KZN Open (A) 2025-05-02 2025-05-04 Standard Ethekwini (KED) 7 7 4 Yes Analysis
8 Gauteng Inter-Region at UJ 2024 (U16 Open) 2024-12-07 2024-12-08 Standard Johannesburg Metro (GJM) 5 5 5 Yes Analysis
9 Knight Riders Spring Chess Tournament 2024 (A) 2024-09-28 2024-09-28 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
10 Centurion Chess Open Tournament 2024 (A) 2024-09-21 2024-09-21 Standard Tshwane (GTP) 5 5 1 Yes Analysis
11 2024 Jacaranda Round Robin Open Chess Tournament (A) 2024-08-17 2024-08-17 Standard Tshwane (GTP) 5 5 2.5 Yes Analysis
12 CPH King David Linksfield Aug Rapid 2024 (A) 2024-08-18 2024-08-18 Rapid Johannesburg Metro (GJM) 5 5 3.5 Yes Analysis
13 JMC Trinityhouse Randpark Ridge 2024 (A) 2024-07-13 2024-07-13 Standard Johannesburg Metro (GJM) 5 5 1 Yes Analysis
14 JMC NG Weltevreden Church 2024 2024-06-29 2024-06-29 Rapid Johannesburg Metro (GJM) 7 7 4 Yes Analysis
15 2024 Prestige College Open Chess Tournament (A) 2024-07-06 2024-07-06 Standard Tshwane (GTP) 5 5 3 Yes Analysis
16 Chess Power House June Open 2024 (A) 2024-06-23 2024-06-23 Standard Ekurhuleni (GE) 5 5 1.5 Yes Analysis
17 2024 KSNG CHess Academy Open Tournament (A) 2024-04-06 2024-04-06 Standard Tshwane (GTP) 5 5 3 Yes Analysis
18 2024 Gauteng Inter-Region Chess Championship (U14A) 2024-01-13 2024-01-14 Standard Tshwane (GTP) 5 5 5 Yes Analysis
19 Africawide Chess Championship 2023 (Open) 2023-11-03 2023-11-05 Standard Johannesburg Metro (GJM) 7 7 4 Yes Analysis
20 JMC Closed Aug 2023 (U14) 2023-08-04 2023-08-06 Standard Johannesburg Metro (GJM) 6 6 6 Yes Analysis
21 Chess Power House 2023 (B) 2023-08-19 2023-08-19 Standard Johannesburg Metro (GJM) 5 4 3 Yes Analysis
22 2023 Menlo Open Tournament (B) 2023-07-22 2023-07-22 Standard Tshwane (GTP) 5 5 4 Yes Analysis
23 JMC - The Higher Ground Restaurant 2nd Blitz Event 2023 2023-07-30 2023-07-30 Blitz Johannesburg Metro (GJM) 7 7 5 Yes Analysis
24 3rd Knight Riders Junior Open 2023 (U14+U16) 2023-07-29 2023-07-29 Standard Johannesburg Metro (GJM) 5 5 4.5 Yes Analysis
25 2023 South African Junior Closed Chess Championships (U14 Open) 2023-03-31 2023-04-04 Standard Chess South Africa (CSA) 9 9 5 Yes Analysis
26 JMC 1 St Peters 2023 (B) 2023-03-18 2023-03-18 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
27 2022 South African Junior Wild Card Chess Championships (U14 Open) 2022-12-09 2022-12-12 Standard 4 Knights (4K) 7 7 5.5 Yes Analysis
28 2022 South African Junior Team Chess Championships (U14 Open) 2022-12-04 2022-12-08 Standard 4 Knights (4K) 7 7 6 Yes Analysis
29 2022 South Africa Junior Blitz Chess Championships (U14) 2022-12-05 2022-12-05 Blitz 4 Knights (4K) 7 7 4 Yes Analysis
30 FNB Chessheroes Anity Bullying 2022 (U14) 2022-11-05 2022-11-05 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
31 Mzansi Spring Open 2022 (Advanced) 2022-09-03 2022-09-03 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
32 JMC 3rd Trials 2022 (B) 2022-09-11 2022-09-11 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
33 Chess Molecules Championship 2022 (U13) 2022-09-17 2022-09-17 Rapid Johannesburg Metro (GJM) 5 5 4.5 Yes Analysis
34 UJ Fundraising Tournament 2022 (C) 2022-08-13 2022-08-13 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
35 JMC Womens Day 2022 (C) 2022-08-06 2022-08-07 Standard Johannesburg Metro (GJM) 6 6 6 Yes Analysis
36 JMC 2nd Trials 2022 (B) 2022-08-27 2022-08-27 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
37 JMC Trials 1 - Laerskool Fontainebleau 2022 (U14) 2022-07-24 2022-07-24 Standard Johannesburg Metro (GJM) 5 5 3 Yes Analysis
38 Alberton Chess Club Open 2022 (D) 2022-07-16 2022-07-16 Standard Ekurhuleni (GE) 5 5 4.5 Yes Analysis
39 Chess Power House Rapid 2022 (B) 2022-06-11 2022-06-11 Rapid Johannesburg Metro (GJM) 5 5 4 Yes Analysis
40 2022 Mid Gauteng Open (D) 2022-05-07 2022-05-07 Standard Tshwane (GTP) 5 5 5 Yes Analysis
41 2022 Silver Lakes Chess Club Open Chess Tournament (D) 2022-05-14 2022-05-14 Standard Tshwane (GTP) 5 5 3.5 Yes Analysis
42 JNW Club - Maragon Open 2019 (E) 2019-08-03 2019-08-03 Standard Johannesburg Metro (GJM) 5 4 1 Yes Analysis

Top 3 Streaks

# Games Start End
1 10 Tournament
2025 ECA 2nd Youth Trials
Tournament
2025 KZN Provincial Trials
date
2025-07-26
rnd
3
type
Standard
result
1
date
2025-09-06
rnd
6
type
Rapid
result
1
Opponent
Radebe, E (Elihle)
Opponent
Mavundla, S (Simo)
2 10 Tournament
2023 Menlo Open Tournament
Tournament
JMC - The Higher Ground Restaurant 2nd Blitz Event 2023
date
2023-07-22
rnd
3
type
Standard
result
1
date
2023-07-30
rnd
2
type
Blitz
result
1
Opponent
Slabbert, ZN (Zander Nicolaas)
Opponent
Parag Jugmohan, T (Tejas)
3 9 Tournament
JMC Trials 1 - Laerskool Fontainebleau 2022
Tournament
UJ Fundraising Tournament 2022
date
2022-07-24
rnd
5
type
Standard
result
1
date
2022-08-13
rnd
2
type
Standard
result
1
Opponent
Kayiya, A (Anashe)
Opponent
De Abreu, P (Pedro)
# Games Start End
1 15 Tournament
2023 Menlo Open Tournament
Tournament
Chess Power House 2023
date
2023-07-22
rnd
3
type
Standard
result
1
date
2023-08-19
rnd
2
type
Standard
result
1
Opponent
Slabbert, ZN (Zander Nicolaas)
Opponent
Saad, A (Ali)
2 9 Tournament
JMC Trials 1 - Laerskool Fontainebleau 2022
Tournament
UJ Fundraising Tournament 2022
date
2022-07-24
rnd
5
type
Standard
result
1
date
2022-08-13
rnd
2
type
Standard
result
1
Opponent
Kayiya, A (Anashe)
Opponent
De Abreu, P (Pedro)
3 8 Tournament
South African Open 2025
Tournament
2025 ECA 2nd Youth Trials
date
2025-07-05
rnd
11
type
Standard
result
1
date
2025-07-26
rnd
1
type
Standard
result
1
Opponent
Songo, D (Divine)
Opponent
Breytenbach, N (Nicla-Cruz)
# Games Start End
1 10 Tournament
Chess Power House Rapid 2022
Tournament
JMC NG Weltevreden Church 2024
date
2022-06-11
rnd
5
type
Rapid
result
1
date
2024-06-29
rnd
4
type
Rapid
result
1
Opponent
Miao, R (Ruichen)
Opponent
Felix, R (Raphael)
2 7 Tournament
CPH King David Linksfield Aug Rapid 2024
Tournament
2025 KZN Provincial Trials
date
2024-08-18
rnd
5
type
Rapid
result
0.5
date
2025-09-06
rnd
6
type
Rapid
result
1
Opponent
Memeh, C (Chime)
Opponent
Mavundla, S (Simo)
3 3 Tournament
CPH King David Linksfield Aug Rapid 2024
Tournament
CPH King David Linksfield Aug Rapid 2024
date
2024-08-18
rnd
1
type
Rapid
result
1
date
2024-08-18
rnd
3
type
Rapid
result
1
Opponent
Beifus, A (Aiden)
Opponent
Lin, S (Shixi)
# Games Start End
1 3 Tournament
JMC - The Higher Ground Restaurant 2nd Blitz Event 2023
Tournament
JMC - The Higher Ground Restaurant 2nd Blitz Event 2023
date
2023-07-30
rnd
4
type
Blitz
result
1
date
2023-07-30
rnd
6
type
Blitz
result
1
Opponent
Bazhko, A (Anton)
Opponent
Klaaste, C (Chadley)
2 2 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
5
type
Blitz
result
1
date
2025-07-02
rnd
6
type
Blitz
result
1
Opponent
Rabiul, B (Bhuiyan)
Opponent
Mlambo, I (Ishmael)
3 2 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
2
type
Blitz
result
1
date
2025-07-02
rnd
3
type
Blitz
result
1
Opponent
Molefe, T (Thabiso)
Opponent
Hodgson, TF (Timothy Fish)
# Games Start End
1 10 Tournament
2025 ECA 2nd Youth Trials
Tournament
2025 KZN Provincial Trials
date
2025-07-26
rnd
3
type
Standard
result
1
date
2025-09-06
rnd
6
type
Rapid
result
1
Opponent
Radebe, E (Elihle)
Opponent
Mavundla, S (Simo)
2 9 Tournament
JMC Trials 1 - Laerskool Fontainebleau 2022
Tournament
UJ Fundraising Tournament 2022
date
2022-07-24
rnd
5
type
Standard
result
1
date
2022-08-13
rnd
2
type
Standard
result
1
Opponent
Kayiya, A (Anashe)
Opponent
De Abreu, P (Pedro)
3 8 Tournament
Knight Riders Spring Chess Tournament 2024
Tournament
2025 KZN Open
date
2024-09-28
rnd
5
type
Standard
result
1
date
2025-05-02
rnd
2
type
Standard
result
1
Opponent
Bazhko, A (Anton)
Opponent
Mnguni, JD (Jakob Dumisani)
# Games Start End
1 10 Tournament
3rd Knight Riders Junior Open 2023
Tournament
Chess Power House 2023
date
2023-07-29
rnd
3
type
Standard
result
1
date
2023-08-19
rnd
2
type
Standard
result
1
Opponent
Bezuidenhout, D (Dawid)
Opponent
Saad, A (Ali)
2 9 Tournament
JMC Trials 1 - Laerskool Fontainebleau 2022
Tournament
UJ Fundraising Tournament 2022
date
2022-07-24
rnd
5
type
Standard
result
1
date
2022-08-13
rnd
2
type
Standard
result
1
Opponent
Kayiya, A (Anashe)
Opponent
De Abreu, P (Pedro)
3 8 Tournament
Knight Riders Spring Chess Tournament 2024
Tournament
2025 KZN Open
date
2024-09-28
rnd
5
type
Standard
result
1
date
2025-05-02
rnd
2
type
Standard
result
1
Opponent
Bazhko, A (Anton)
Opponent
Mnguni, JD (Jakob Dumisani)
# Games Start End
1 6 Tournament
2025 KZN Provincial Trials
Tournament
2025 KZN Provincial Trials
date
2025-09-06
rnd
1
type
Rapid
result
1
date
2025-09-06
rnd
6
type
Rapid
result
1
Opponent
Doorsamy, S (Sahilan)
Opponent
Mavundla, S (Simo)
2 5 Tournament
Chess Power House Rapid 2022
Tournament
Chess Molecules Championship 2022
date
2022-06-11
rnd
5
type
Rapid
result
1
date
2022-09-17
rnd
4
type
Rapid
result
1
Opponent
Miao, R (Ruichen)
Opponent
Ramohlohla, L (Lerato Motaso)
3 4 Tournament
JMC NG Weltevreden Church 2024
Tournament
JMC NG Weltevreden Church 2024
date
2024-06-29
rnd
1
type
Rapid
result
1
date
2024-06-29
rnd
4
type
Rapid
result
1
Opponent
Sukraj, T (Tasvir)
Opponent
Felix, R (Raphael)
# Games Start End
1 3 Tournament
JMC - The Higher Ground Restaurant 2nd Blitz Event 2023
Tournament
JMC - The Higher Ground Restaurant 2nd Blitz Event 2023
date
2023-07-30
rnd
4
type
Blitz
result
1
date
2023-07-30
rnd
6
type
Blitz
result
1
Opponent
Bazhko, A (Anton)
Opponent
Klaaste, C (Chadley)
2 2 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
5
type
Blitz
result
1
date
2025-07-02
rnd
6
type
Blitz
result
1
Opponent
Rabiul, B (Bhuiyan)
Opponent
Mlambo, I (Ishmael)
3 2 Tournament
South African Open 2025
Tournament
South African Open 2025
date
2025-07-02
rnd
2
type
Blitz
result
1
date
2025-07-02
rnd
3
type
Blitz
result
1
Opponent
Molefe, T (Thabiso)
Opponent
Hodgson, TF (Timothy Fish)

Top 10 opponents most often played

# Opponent Main Standard Rapid Blitz
Gms Score Dp Gms Score Dp Gms Score Dp Gms Score Dp
Aor Prat Aor Prat Aor Prat Aor Prat
1 Li ,Z (Zhengfei) 7 1 -303.6 5 1 -255 1 0 -425 1 0 -425
1672.5 1368.9 1675 1417.5 1343.9 1247.5 1200 1247.5
2 Roetz ,K (Kyle) 3 3 425 3 3 425 0 0 0 0 0 0
1273.1 1698.1 1262 1698.1 0 0 0 0
3 Naidoo ,K (Kajol) 3 1 -141.7 3 1 -141.7 0 0 0 0 0 0
1478.5 1336.9 1468.7 1336.9 0 0 0 0
4 Deysel ,K (Kaleb) 3 1 -141.7 3 1 -141.7 0 0 0 0 0 0
1580.3 1438.7 1582.3 1438.7 0 0 0 0
5 Naicker ,GC (Gabriel Christian) 3 1.5 0 3 1.5 0 0 0 0 0 0 0
1370.4 1370.4 1362.4 1370.4 0 0 0 0
6 Kruger ,T (Tobias) 3 3 425 3 3 425 0 0 0 0 0 0
1707.1 2132.1 1708.6 2132.1 0 0 0 0
7 Chen ,Y (Youlin) 2 2 425 2 2 425 0 0 0 0 0 0
1543.7 1968.7 1545.5 1968.7 0 0 0 0
8 Shaik ,M (Muhaimin) 2 1 0 2 1 0 0 0 0 0 0 0
1466.4 1466.4 1498.3 1466.4 0 0 0 0
9 Botha ,T (Tyler) 2 1 0 2 1 0 0 0 0 0 0 0
1412.2 1412.2 1409.1 1412.2 0 0 0 0
10 De Vries ,MA (Andrio) 2 1.5 212.5 2 1.5 212.5 0 0 0 0 0 0
1631.2 1843.7 1629.4 1843.7 0 0 0 0

Norms

No norms achieved.
# Norm Tournament Start End Rounds Games Score Details
© Chess South Africa