Surname or Chess SA id..
Chess SA Region AOC

PLAYER PAGE

Yu Bo (David) Weng

1100117290
Ethekwini (KED)
Personal
Main rating
Rating 1864.4
K-factor 24
Floor 1364.4
Highest 1864.4 (2026-06-01)
Min/Max +/- allowed 64
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1843.9
Final +/- 0
New Rating
()
Rating 1864.4
K-factor 24
Floor 1364.4
Highest 1864.4 (2026-06-01)
Min/Max +/- allowed 64.3
Standard rating
Rating 1840.5
K-factor 24
Floor 1340.5
Highest 1840.5 (2026-06-01)
Min/Max +/- allowed 66.6
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1769.5
Final +/- 0
New Rating
()
Rating 1840.5
K-factor 24
Floor 1340.5
Highest 1840.5 (2026-06-01)
Min/Max +/- allowed 66.6
Rapid rating
Rating 1585
K-factor 32
Floor 1085
Highest 1585 (2026-06-01)
Min/Max +/- allowed 95.8
Rating Change
()
Games 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1640.6
Final +/- 0
New Rating
()
Rating 1585
K-factor 32
Floor 1085
Highest 1585 (2026-06-01)
Min/Max +/- allowed 95.8
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 April Rapid Rapid 2026-04-18 2026-04-18 Ethekwini (KED) 5 1796.4 5 5 2028.2 23.2 Details
2 2026 KwaZulu Natal Open (A) Standard 2026-05-01 2026-05-03 Ethekwini (KED) 7 1796.4 7 5 2009 44.8 Details
3 2026 Umhlanga CC (Open) Standard 2026-03-21 2026-03-22 Ethekwini (KED) 6 1785.6 6 4.5 1828.4 10.8 Details
4 2025 Umhlanga Heritage Open (Open) Standard 2025-09-27 2025-09-27 Ethekwini (KED) 5 1782.7 4 2 1673.9 -8 Details
5 2025 KZN Provincial Trials (U16) Rapid 2025-09-06 2025-09-06 Ethekwini (KED) 6 1782.7 6 6 1864.5 10.2 Details
6 2025 ECA 2nd Youth Trials (U16) Standard 2025-07-26 2025-07-27 Ethekwini (KED) 6 1715.4 6 5 1654.4 -5 Details
7 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
8 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
9 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
10 2025 KZN Open (A) Standard 2025-05-02 2025-05-04 Ethekwini (KED) 7 1690.7 7 4 1804.6 17.6 Details
11 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
12 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
13 Centurion Chess Open Tournament 2024 (A) Standard 2024-09-21 2024-09-21 Tshwane (GTP) 5 1691 5 1 1412.4 -27.9 Details
14 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
15 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
16 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
17 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
18 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
19 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
20 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
21 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
22 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
23 JMC Closed Aug 2023 (U14) Standard 2023-08-04 2023-08-06 Johannesburg Metro (GJM) 6 1608 6 6 1902.4 39.2 Details
24 Chess Power House 2023 (B) Standard 2023-08-19 2023-08-19 Johannesburg Metro (GJM) 5 1608 4 3 1542.8 -5.4 Details
25 2023 Menlo Open Tournament (B) Standard 2023-07-22 2023-07-22 Tshwane (GTP) 5 1550 5 4 1799 25.1 Details
26 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
27 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
28 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
29 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
30 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
31 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
32 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
33 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
34 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
35 JMC 3rd Trials 2022 (B) Standard 2022-09-11 2022-09-11 Johannesburg Metro (GJM) 5 1464.7 5 3 1388.9 -8 Details
36 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
37 UJ Fundraising Tournament 2022 (C) Standard 2022-08-13 2022-08-13 Johannesburg Metro (GJM) 5 1403.9 5 3 1267 -12.6 Details
38 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
39 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
40 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
41 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
42 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
43 2022 Mid Gauteng Open (D) Standard 2022-05-07 2022-05-07 Tshwane (GTP) 5 1163.5 5 5 1621.1 44 Details
44 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
45 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 18
Wins 14
Draws 1
Losses 3
White 10
Black 8
White wins 8
Black wins 6
Score 14.5
Percent 80.6
Dp 259.7
AOR 1694.4
Performance 1954.1
Game statistics (History)
Games 257
Wins 169
Draws 17
Losses 71
White 131
Black 126
White wins 85
Black wins 84
Score 177.5
Percent 69.1
Dp 162.1
AOR 1490.2
Performance 1652.2
Rankings (Main)
National
Overall 185
Gender 176
Age group 14
Gender/Age 14
Provincial
Overall 8
Gender 8
Age group 1
Gender/Age 1
Regional
Overall 7
Gender 7
Age group 1
Gender/Age 1
Rankings (Standard)
National
Overall 197
Gender 189
Age group 16
Gender/Age 16
Provincial
Overall 8
Gender 8
Age group 1
Gender/Age 1
Regional
Overall 7
Gender 7
Age group 1
Gender/Age 1
Rankings (Rapid)
National
Overall 193
Gender 187
Age group 18
Gender/Age 18
Provincial
Overall 18
Gender 18
Age group 2
Gender/Age 2
Regional
Overall 16
Gender 16
Age group 2
Gender/Age 2
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 18
Score 14.5
Percent 80.6
Aor 1694.4
Dp 259.7
Prat 1954.1
Performance (12 months)
Games 59
Score 44.5
Percent 75.4
Aor 1622.7
Dp 216.1
Prat 1838.8
Performance (History)
Games 257
Score 177.5
Percent 69.1
Aor 1490.2
Dp 162.1
Prat 1652.2
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 Ngcongo, M (Minenhle) 4 2 2 South African Open 2025 (B) 2026 KwaZulu Natal Open (A) Details
Overall 3 Makaula, L (Lubanzi) 3 2 1 2025 Umhlanga Youth Open (High School) 2026 Umhlanga CC (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 Ngcongo, M (Minenhle) 4 2 2 South African Open 2025 (B) 2026 KwaZulu Natal Open (A) Details
Standard 3 Kruger, T (Tobias) 3 2 1 Africawide Chess Championship 2023 (Open) South African Open 2025 (B) Details
Standard 4 Roetz, K (Kyle) 3 1 2 JMC 2nd Trials 2022 (B) Mzansi Spring Open 2022 (Advanced) Details
Standard 5 Naidoo, K (Kajol) 3 0 3 FNB Chessheroes Anity Bullying 2022 (U14) Centurion Chess Open Tournament 2024 (A) Details