Surname or Chess SA id..
Chess SA Region AOC

PLAYER PAGE

Yu Bo (David) Weng

1100117290
Ethekwini (KED)
Personal
Main rating
Rating 1785.6
K-factor 28
Floor 1285.6
Highest 1785.6 (2025-09-30)
Min/Max +/- allowed 72
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1646
Final +/- 0
New Rating
()
Rating 1785.6
K-factor 28
Floor 1285.6
Highest 1785.6 (2025-09-30)
Min/Max +/- allowed 72
Standard rating
Rating 1771.3
K-factor 28
Floor 1283
Highest 1783 (2025-08-01)
Min/Max +/- allowed 72.3
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1643.5
Final +/- 0
New Rating
()
Rating 1771.3
K-factor 28
Floor 1283
Highest 1783 (2025-08-01)
Min/Max +/- allowed 72.3
Rapid rating
Rating 1472.6
K-factor 32
Floor 972.6
Highest 1472.6 (2025-09-30)
Min/Max +/- allowed 112.4
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1442.5
Final +/- 0
New Rating
()
Rating 1472.6
K-factor 32
Floor 972.6
Highest 1472.6 (2025-09-30)
Min/Max +/- allowed 112.4
Blitz rating
Rating 1352.2
K-factor 36
Floor 852.2
Highest 1371.6 (2023-07-01)
Min/Max +/- allowed 129.9
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 0
Final +/- 0
New Rating
()
Rating 1352.2
K-factor 36
Floor 852.2
Highest 1371.6 (2023-07-01)
Min/Max +/- allowed 129.9
Rating Graph
Tournaments
No tournaments found.
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- Details
1 2025 Umhlanga Heritage Open (Open) Standard 2025-09-27 2025-09-27 Ethekwini (KED) 5 1782.7 4 2 1673.9 0 Details
2 2025 KZN Provincial Trials (U16) Rapid 2025-09-06 2025-09-06 Ethekwini (KED) 6 1782.7 6 6 1864.5 0 Details
3 2025 ECA 2nd Youth Trials (U16) Standard 2025-07-26 2025-07-27 Ethekwini (KED) 6 1715.4 6 5 1654.4 0 Details
4 2025 Umhlanga Youth Open (High School) Standard 2025-07-12 2025-07-13 Ethekwini (KED) 6 1715.4 6 5.5 1927.3 0 Details
5 South African Open 2025 (B) Classical 2025-06-28 2025-07-05 Johannesburg Metro (GJM) 11 1715.4 11 7.5 1807.8 0 Details
6 South African Open 2025 (Blitz) Blitz 2025-07-02 2025-07-02 Johannesburg Metro (GJM) 9 1715.4 8 4 1757.2 0 Details
7 2025 KZN Open (A) Standard 2025-05-02 2025-05-04 Ethekwini (KED) 7 1690.7 7 4 1804.6 0 Details
8 Gauteng Inter-Region at UJ 2024 (U16 Open) Standard 2024-12-07 2024-12-08 Johannesburg Metro (GJM) 5 1651.5 5 5 1910.2 0 Details
9 Knight Riders Spring Chess Tournament 2024 (A) Standard 2024-09-28 2024-09-28 Johannesburg Metro (GJM) 5 1691 5 3 1680.6 0 Details
10 Centurion Chess Open Tournament 2024 (A) Standard 2024-09-21 2024-09-21 Tshwane (GTP) 5 1691 5 1 1412.4 0 Details
11 2024 Jacaranda Round Robin Open Chess Tournament (A) Standard 2024-08-17 2024-08-17 Tshwane (GTP) 5 1685 5 2.5 1797.5 0 Details
12 CPH King David Linksfield Aug Rapid 2024 (A) Rapid 2024-08-18 2024-08-18 Johannesburg Metro (GJM) 5 1685 5 3.5 1564.4 0 Details
13 JMC Trinityhouse Randpark Ridge 2024 (A) Standard 2024-07-13 2024-07-13 Johannesburg Metro (GJM) 5 1698.6 5 1 1496.1 0 Details
14 JMC NG Weltevreden Church 2024 Rapid 2024-06-29 2024-06-29 Johannesburg Metro (GJM) 7 1698.6 7 4 1770.5 0 Details
15 2024 Prestige College Open Chess Tournament (A) Standard 2024-07-06 2024-07-06 Tshwane (GTP) 5 1698.6 5 3 1750.9 0 Details
16 Chess Power House June Open 2024 (A) Standard 2024-06-23 2024-06-23 Ekurhuleni (GE) 5 1698.1 5 1.5 1744.9 0 Details
17 2024 KSNG CHess Academy Open Tournament (A) Standard 2024-04-06 2024-04-06 Tshwane (GTP) 5 1689 5 3 1746.3 0 Details
18 2024 Gauteng Inter-Region Chess Championship (U14A) Standard 2024-01-13 2024-01-14 Tshwane (GTP) 5 1652.2 5 5 1880.3 0 Details
19 Africawide Chess Championship 2023 (Open) Standard 2023-11-03 2023-11-05 Johannesburg Metro (GJM) 7 1655.1 7 4 1646.6 0 Details
20 JMC Closed Aug 2023 (U14) Standard 2023-08-04 2023-08-06 Johannesburg Metro (GJM) 6 1608 6 6 1902.4 0 Details
21 Chess Power House 2023 (B) Standard 2023-08-19 2023-08-19 Johannesburg Metro (GJM) 5 1608 4 3 1542.8 0 Details
22 2023 Menlo Open Tournament (B) Standard 2023-07-22 2023-07-22 Tshwane (GTP) 5 1550 5 4 1799 0 Details
23 JMC - The Higher Ground Restaurant 2nd Blitz Event 2023 Blitz 2023-07-30 2023-07-30 Johannesburg Metro (GJM) 7 1550 7 5 1668.1 0 Details
24 3rd Knight Riders Junior Open 2023 (U14+U16) Standard 2023-07-29 2023-07-29 Johannesburg Metro (GJM) 5 1550 5 4.5 1608.9 0 Details
25 2023 South African Junior Closed Chess Championships (U14 Open) Classical 2023-03-31 2023-04-04 Chess South Africa (CSA) 9 1543.9 9 5 1557.4 0 Details
26 JMC 1 St Peters 2023 (B) Standard 2023-03-18 2023-03-18 Johannesburg Metro (GJM) 5 1559.8 5 3 1464.4 0 Details
27 2022 South African Junior Wild Card Chess Championships (U14 Open) Classical 2022-12-09 2022-12-12 4 Knights (4K) 7 1449.1 7 5.5 1647.6 0 Details
28 2022 South African Junior Team Chess Championships (U14 Open) Classical 2022-12-04 2022-12-08 4 Knights (4K) 7 1449.1 7 6 1657.2 0 Details
29 2022 South Africa Junior Blitz Chess Championships (U14) Blitz 2022-12-05 2022-12-05 4 Knights (4K) 7 1449.1 7 4 1502.4 0 Details
30 FNB Chessheroes Anity Bullying 2022 (U14) Standard 2022-11-05 2022-11-05 Johannesburg Metro (GJM) 5 1461.3 5 3 1374.1 0 Details
31 Mzansi Spring Open 2022 (Advanced) Standard 2022-09-03 2022-09-03 Johannesburg Metro (GJM) 5 1464.7 5 3 1405.5 0 Details
32 JMC 3rd Trials 2022 (B) Standard 2022-09-11 2022-09-11 Johannesburg Metro (GJM) 5 1464.7 5 3 1388.9 0 Details
33 Chess Molecules Championship 2022 (U13) Rapid 2022-09-17 2022-09-17 Johannesburg Metro (GJM) 5 1464.7 5 4.5 1629.2 0 Details
34 UJ Fundraising Tournament 2022 (C) Standard 2022-08-13 2022-08-13 Johannesburg Metro (GJM) 5 1403.9 5 3 1267 0 Details
35 JMC Womens Day 2022 (C) Standard 2022-08-06 2022-08-07 Johannesburg Metro (GJM) 6 1403.9 6 6 1755.5 0 Details
36 JMC 2nd Trials 2022 (B) Standard 2022-08-27 2022-08-27 Johannesburg Metro (GJM) 5 1403.9 5 3 1435.6 0 Details
37 JMC Trials 1 - Laerskool Fontainebleau 2022 (U14) Standard 2022-07-24 2022-07-24 Johannesburg Metro (GJM) 5 1290 5 3 1413.7 0 Details
38 Alberton Chess Club Open 2022 (D) Standard 2022-07-16 2022-07-16 Ekurhuleni (GE) 5 1290 5 4.5 1515.7 0 Details
39 Chess Power House Rapid 2022 (B) Rapid 2022-06-11 2022-06-11 Johannesburg Metro (GJM) 5 1265.1 5 4 1505.5 0 Details
40 2022 Mid Gauteng Open (D) Standard 2022-05-07 2022-05-07 Tshwane (GTP) 5 1163.5 5 5 1621.1 0 Details
41 2022 Silver Lakes Chess Club Open Chess Tournament (D) Standard 2022-05-14 2022-05-14 Tshwane (GTP) 5 1163.5 5 3.5 1239.7 0 Details
42 JNW Club - Maragon Open 2019 (E) Standard 2019-08-03 2019-08-03 Johannesburg Metro (GJM) 5 1200 4 1 965.8 0 Details
Game statistics ( )
Games 0
Wins 0
Draws 0
Losses 0
White 0
Black 0
White wins 0
Black wins 0
Score 0
Percent 0
Dp 0
AOR 0
Performance 0
Game statistics ()
Games 0
Wins 0
Draws 0
Losses 0
White 0
Black 0
White wins 0
Black wins 0
Score 0
Percent 0
Dp 0
AOR 0
Performance 0
Game statistics (History)
Games 239
Wins 155
Draws 16
Losses 68
White 121
Black 118
White wins 77
Black wins 78
Score 163
Percent 68.2
Dp 154.7
AOR 1474.8
Performance 1629.5
Rankings (Main)
National
Overall 263
Gender 252
Age group 17
Gender/Age 17
Provincial
Overall 10
Gender 10
Age group 1
Gender/Age 1
Regional
Overall 9
Gender 9
Age group 1
Gender/Age 1
Rankings (Standard)
National
Overall 274
Gender 263
Age group 17
Gender/Age 17
Provincial
Overall 12
Gender 12
Age group 1
Gender/Age 1
Regional
Overall 11
Gender 11
Age group 1
Gender/Age 1
Rankings (Rapid)
National
Overall 417
Gender 383
Age group 44
Gender/Age 41
Provincial
Overall 41
Gender 39
Age group 4
Gender/Age 4
Regional
Overall 33
Gender 31
Age group 3
Gender/Age 3
Rankings (Blitz)
National
Overall -1
Gender -1
Age group -1
Gender/Age -1
Provincial
Overall -1
Gender -1
Age group -1
Gender/Age -1
Regional
Overall -1
Gender -1
Age group -1
Gender/Age -1
Performance ( )
Games 0
Score 0
Percent 0
Aor 0
Dp 0
Prat 0
Performance ()
Games 0
Score 0
Percent 0
Aor 0
Dp 0
Prat 0
Performance (12 months)
Games 48
Score 34
Percent 70.8
Aor 1613.5
Dp 177.1
Prat 1790.6
Performance (History)
Games 239
Score 163
Percent 68.2
Aor 1474.8
Dp 154.7
Prat 1629.5
Top 5 opponents most often played
Type # Opponent Games White Black First tournament Last tournament Details
Overall 1 Li, Z (Zhengfei) 7 4 3 Mzansi Spring Open 2022 (Advanced) 2025 KZN Open (A) Details
Overall 2 Naidoo, K (Kajol) 3 0 3 FNB Chessheroes Anity Bullying 2022 (U14) Centurion Chess Open Tournament 2024 (A) Details
Overall 3 Naicker, GC (Gabriel Christian) 3 0 3 JMC Trials 1 - Laerskool Fontainebleau 2022 (U14) 2022 South African Junior Wild Card Chess Championships (U14 Open) Details
Overall 4 Roetz, K (Kyle) 3 1 2 JMC 2nd Trials 2022 (B) Mzansi Spring Open 2022 (Advanced) Details
Overall 5 Kruger, T (Tobias) 3 2 1 Africawide Chess Championship 2023 (Open) South African Open 2025 (B) Details
Standard 1 Li, Z (Zhengfei) 5 4 1 Mzansi Spring Open 2022 (Advanced) 2025 KZN Open (A) Details
Standard 2 Naidoo, K (Kajol) 3 0 3 FNB Chessheroes Anity Bullying 2022 (U14) Centurion Chess Open Tournament 2024 (A) Details
Standard 3 Roetz, K (Kyle) 3 1 2 JMC 2nd Trials 2022 (B) Mzansi Spring Open 2022 (Advanced) Details
Standard 4 Kruger, T (Tobias) 3 2 1 Africawide Chess Championship 2023 (Open) South African Open 2025 (B) Details
Standard 5 Deysel, K (Kaleb) 3 1 2 JMC 2nd Trials 2022 (B) JMC Trinityhouse Randpark Ridge 2024 (A) Details