Surname or Chess SA id..
Chess SA Region AOC

PLAYER PAGE

Yu Bo (David) Weng

1100117290
Ethekwini (KED)
Personal
Main rating
Rating 1796.4
K-factor 28
Floor 1296.4
Highest 1796.4 (2026-03-01)
Min/Max +/- allowed 71
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1678.9
Final +/- 0
New Rating
()
Rating 1796.4
K-factor 28
Floor 1296.4
Highest 1796.4 (2026-03-01)
Min/Max +/- allowed 70.9
Standard rating
Rating 1788.5
K-factor 28
Floor 1288.5
Highest 1788.5 (2026-03-01)
Min/Max +/- allowed 71.7
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1678.3
Final +/- 0
New Rating
()
Rating 1788.5
K-factor 28
Floor 1288.5
Highest 1788.5 (2026-03-01)
Min/Max +/- allowed 71.7
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 1419
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 2026 Umhlanga CC (Open) Standard 2026-03-21 2026-03-22 Ethekwini (KED) 6 1785.6 6 4.5 1828.4 10.8 Details
2 2025 Umhlanga Heritage Open (Open) Standard 2025-09-27 2025-09-27 Ethekwini (KED) 5 1782.7 4 2 1673.9 -8 Details
3 2025 KZN Provincial Trials (U16) Rapid 2025-09-06 2025-09-06 Ethekwini (KED) 6 1782.7 6 6 1864.5 10.2 Details
4 2025 ECA 2nd Youth Trials (U16) Standard 2025-07-26 2025-07-27 Ethekwini (KED) 6 1715.4 6 5 1654.4 -5 Details
5 2025 Umhlanga Youth Open (High School) Standard 2025-07-12 2025-07-13 Ethekwini (KED) 6 1715.4 6 5.5 1927.3 25.2 Details
6 South African Open 2025 (B) Classical 2025-06-28 2025-07-05 Johannesburg Metro (GJM) 11 1715.4 11 7.5 1807.8 26.2 Details
7 South African Open 2025 (Blitz) Blitz 2025-07-02 2025-07-02 Johannesburg Metro (GJM) 9 1715.4 8 4 1757.2 1.6 Details
8 2025 KZN Open (A) Standard 2025-05-02 2025-05-04 Ethekwini (KED) 7 1690.7 7 4 1804.6 17.6 Details
9 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 28 Details
10 Knight Riders Spring Chess Tournament 2024 (A) Standard 2024-09-28 2024-09-28 Johannesburg Metro (GJM) 5 1691 5 3 1680.6 -0.3 Details
11 Centurion Chess Open Tournament 2024 (A) Standard 2024-09-21 2024-09-21 Tshwane (GTP) 5 1691 5 1 1412.4 -27.9 Details
12 2024 Jacaranda Round Robin Open Chess Tournament (A) Standard 2024-08-17 2024-08-17 Tshwane (GTP) 5 1685 5 2.5 1797.5 10.1 Details
13 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 -5.9 Details
14 JMC Trinityhouse Randpark Ridge 2024 (A) Standard 2024-07-13 2024-07-13 Johannesburg Metro (GJM) 5 1698.6 5 1 1496.1 -19.1 Details
15 JMC NG Weltevreden Church 2024 Rapid 2024-06-29 2024-06-29 Johannesburg Metro (GJM) 7 1698.6 7 4 1770.5 4.9 Details
16 2024 Prestige College Open Chess Tournament (A) Standard 2024-07-06 2024-07-06 Tshwane (GTP) 5 1698.6 5 3 1750.9 4.5 Details
17 Chess Power House June Open 2024 (A) Standard 2024-06-23 2024-06-23 Ekurhuleni (GE) 5 1698.1 5 1.5 1744.9 0.3 Details
18 2024 KSNG CHess Academy Open Tournament (A) Standard 2024-04-06 2024-04-06 Tshwane (GTP) 5 1689 5 3 1746.3 6.5 Details
19 2024 Gauteng Inter-Region Chess Championship (U14A) Standard 2024-01-13 2024-01-14 Tshwane (GTP) 5 1652.2 5 5 1880.3 26.3 Details
20 Africawide Chess Championship 2023 (Open) Standard 2023-11-03 2023-11-05 Johannesburg Metro (GJM) 7 1655.1 7 4 1646.6 -2.1 Details
21 JMC Closed Aug 2023 (U14) Standard 2023-08-04 2023-08-06 Johannesburg Metro (GJM) 6 1608 6 6 1902.4 39.2 Details
22 Chess Power House 2023 (B) Standard 2023-08-19 2023-08-19 Johannesburg Metro (GJM) 5 1608 4 3 1542.8 -5.4 Details
23 2023 Menlo Open Tournament (B) Standard 2023-07-22 2023-07-22 Tshwane (GTP) 5 1550 5 4 1799 25.1 Details
24 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 4.6 Details
25 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 6.8 Details
26 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 3.8 Details
27 JMC 1 St Peters 2023 (B) Standard 2023-03-18 2023-03-18 Johannesburg Metro (GJM) 5 1559.8 5 3 1464.4 -9.8 Details
28 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 32 Details
29 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 35.2 Details
30 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 1.7 Details
31 FNB Chessheroes Anity Bullying 2022 (U14) Standard 2022-11-05 2022-11-05 Johannesburg Metro (GJM) 5 1461.3 5 3 1374.1 -7.6 Details
32 Mzansi Spring Open 2022 (Advanced) Standard 2022-09-03 2022-09-03 Johannesburg Metro (GJM) 5 1464.7 5 3 1405.5 -6.3 Details
33 JMC 3rd Trials 2022 (B) Standard 2022-09-11 2022-09-11 Johannesburg Metro (GJM) 5 1464.7 5 3 1388.9 -8 Details
34 Chess Molecules Championship 2022 (U13) Rapid 2022-09-17 2022-09-17 Johannesburg Metro (GJM) 5 1464.7 5 4.5 1629.2 12.3 Details
35 UJ Fundraising Tournament 2022 (C) Standard 2022-08-13 2022-08-13 Johannesburg Metro (GJM) 5 1403.9 5 3 1267 -12.6 Details
36 JMC Womens Day 2022 (C) Standard 2022-08-06 2022-08-07 Johannesburg Metro (GJM) 6 1403.9 6 6 1755.5 46.7 Details
37 JMC 2nd Trials 2022 (B) Standard 2022-08-27 2022-08-27 Johannesburg Metro (GJM) 5 1403.9 5 3 1435.6 3.8 Details
38 JMC Trials 1 - Laerskool Fontainebleau 2022 (U14) Standard 2022-07-24 2022-07-24 Johannesburg Metro (GJM) 5 1290 5 3 1413.7 11.3 Details
39 Alberton Chess Club Open 2022 (D) Standard 2022-07-16 2022-07-16 Ekurhuleni (GE) 5 1290 5 4.5 1515.7 22.9 Details
40 Chess Power House Rapid 2022 (B) Rapid 2022-06-11 2022-06-11 Johannesburg Metro (GJM) 5 1265.1 5 4 1505.5 13.8 Details
41 2022 Mid Gauteng Open (D) Standard 2022-05-07 2022-05-07 Tshwane (GTP) 5 1163.5 5 5 1621.1 44 Details
42 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 6.8 Details
43 JNW Club - Maragon Open 2019 (E) Standard 2019-08-03 2019-08-03 Johannesburg Metro (GJM) 5 1200 4 1 965.8 -18.3 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 6
Wins 4
Draws 1
Losses 1
White 3
Black 3
White wins 2
Black wins 2
Score 4.5
Percent 75
Dp 212.5
AOR 1615.9
Performance 1828.4
Game statistics (History)
Games 245
Wins 159
Draws 17
Losses 69
White 124
Black 121
White wins 79
Black wins 80
Score 167.5
Percent 68.4
Dp 156.1
AOR 1478.3
Performance 1634.4
Rankings (Main)
National
Overall 249
Gender 238
Age group 18
Gender/Age 18
Provincial
Overall 11
Gender 11
Age group 1
Gender/Age 1
Regional
Overall 10
Gender 10
Age group 1
Gender/Age 1
Rankings (Standard)
National
Overall 258
Gender 246
Age group 19
Gender/Age 19
Provincial
Overall 11
Gender 11
Age group 1
Gender/Age 1
Regional
Overall 10
Gender 10
Age group 1
Gender/Age 1
Rankings (Rapid)
National
Overall 428
Gender 393
Age group 43
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 6
Score 4.5
Percent 75
Aor 1615.9
Dp 212.5
Prat 1828.4
Performance (12 months)
Games 54
Score 38.5
Percent 71.3
Aor 1613.8
Dp 181
Prat 1794.8
Performance (History)
Games 245
Score 167.5
Percent 68.4
Aor 1478.3
Dp 156.1
Prat 1634.4
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 Kruger, T (Tobias) 3 2 1 Africawide Chess Championship 2023 (Open) South African Open 2025 (B) Details
Overall 3 Ngcongo, M (Minenhle) 3 2 1 South African Open 2025 (B) 2026 Umhlanga CC (Open) Details
Overall 4 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 5 Roetz, K (Kyle) 3 1 2 JMC 2nd Trials 2022 (B) Mzansi Spring Open 2022 (Advanced) 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 Ngcongo, M (Minenhle) 3 2 1 South African Open 2025 (B) 2026 Umhlanga CC (Open) Details
Standard 4 Roetz, K (Kyle) 3 1 2 JMC 2nd Trials 2022 (B) Mzansi Spring Open 2022 (Advanced) Details
Standard 5 Deysel, K (Kaleb) 3 1 2 JMC 2nd Trials 2022 (B) JMC Trinityhouse Randpark Ridge 2024 (A) Details