PLAYER PAGE
Junjie Weng
1180313026Buffalo City (EBC)Personal
Main rating
| Rating | 1508.3 |
| K-factor | 32 |
| Floor | 1069 |
| Highest | 1589.8 (2025-09-01) |
| Min/Max +/- allowed | 95 |
| Rating Change () | |
| Games | 4 |
| Score | 0 |
| We | 2.38 |
| SWe | -2.03 |
| Temp +/- | -64.9 |
| Penalties | 0 |
| Weight perform | 1294.5 |
| Final +/- | -64.9 |
| New Rating () | |
| Rating | 1443.4 |
| K-factor | 32 |
| Floor | 1069 |
| Highest | 1589.8 (2025-09-01) |
| Min/Max +/- allowed | 95.2 |
Standard rating
| Rating | 1526.8 |
| K-factor | 32 |
| Floor | 1068.6 |
| Highest | 1590.4 (2025-09-01) |
| Min/Max +/- allowed | 95.1 |
| Rating Change () | |
| Games | 4 |
| Score | 0 |
| We | 2.66 |
| SWe | -2.66 |
| Temp +/- | -85.2 |
| Penalties | 0 |
| Weight perform | 1330.5 |
| Final +/- | -85.2 |
| New Rating () | |
| Rating | 1441.6 |
| K-factor | 32 |
| Floor | 1068.6 |
| Highest | 1590.4 (2025-09-01) |
| Min/Max +/- allowed | 95.1 |
Rapid rating
| Rating | 1361.9 |
| K-factor | 36 |
| Floor | 861.9 |
| Highest | 1361.9 (2026-09-01) |
| Min/Max +/- allowed | 131.7 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1339.3 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1361.9 |
| K-factor | 36 |
| Floor | 861.9 |
| Highest | 1361.9 (2026-09-01) |
| Min/Max +/- allowed | 131.7 |
Blitz rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2024-10-01) |
| Min/Max +/- allowed | 165.8 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2024-10-01) |
| Min/Max +/- allowed | 165.8 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Buffalo City Open 2026 (B) | Standard | 2026-10-02 | 2026-10-03 | Buffalo City (EBC) | 5 | 1508.3 | 4 | 0 | 1002.3 | -64.9 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Beacon Bay Chess Club 2nd Annual Winter Cup 2026 (Foundation) | Rapid | 2026-08-29 | 2026-08-29 | Buffalo City (EBC) | 6 | 1508.3 | 6 | 4.5 | 1435.4 | -1.8 | Details |
| 2 | 2026 Buffalo City Closed (U10 Boys) | Standard | 2026-08-08 | 2026-08-08 | Buffalo City (EBC) | 5 | 1508.3 | 5 | 3 | 1528.9 | 4.9 | Details |
| 3 | 2026 Buffalo City Chess Trials 5 (U10) | Standard | 2026-07-11 | 2026-07-11 | Buffalo City (EBC) | 5 | 1490.9 | 5 | 4 | 1586.7 | 14.1 | Details |
| 4 | 2026 Buffalo City Chess Trials 4 (U10) | Standard | 2026-05-30 | 2026-05-30 | Buffalo City (EBC) | 5 | 1474.3 | 5 | 4 | 1583.6 | 16.2 | Details |
| 5 | Spartans Bishops 2026 (Junior Pawns) | Standard | 2026-05-01 | 2026-05-01 | Sarah Baartman (ESB) | 5 | 1474.3 | 4 | 3 | 1422.2 | -5.8 | Details |
| 6 | Vikings April Rapid 2026 (U8+U10) | Rapid | 2026-04-18 | 2026-04-18 | Buffalo City (EBC) | 5 | 1474.3 | 5 | 4 | 1551.6 | 9.8 | Details |
| 7 | Hudson Park Primary Festival 2026 (U8+U10) | Standard | 2026-03-07 | 2026-03-07 | Buffalo City (EBC) | 5 | 1454 | 4 | 3.5 | 1647.2 | 5.7 | Details |
| 8 | Eastern Cape Open 2026 (U8-U14 Boys) | Standard | 2026-04-11 | 2026-04-12 | Buffalo City (EBC) | 7 | 1454 | 7 | 4 | 1487.5 | 7.1 | Details |
| 9 | 2026 Buffalo City Chess Trials 3 (U10) | Standard | 2026-03-21 | 2026-03-21 | Buffalo City (EBC) | 5 | 1503.2 | 5 | 4 | 1524.7 | 4.9 | Details |
| 10 | Vikings Rapid 2026 (A) | Rapid | 2026-02-21 | 2026-02-21 | Buffalo City (EBC) | 8 | 1503.2 | 7 | 0.5 | 1165.1 | -35.1 | Details |
| 11 | 2026 Buffalo City Chess Trials 2 (U8+U10 Boys) | Standard | 2026-02-28 | 2026-02-28 | Buffalo City | 5 | 1503.2 | 5 | 3 | 1386.6 | -19 | Details |
| 12 | 2026 Buffalo City Chess Trials 1 (U8+U10) | Standard | 2026-02-07 | 2026-02-07 | Buffalo City (EBC) | 5 | 1493.4 | 5 | 4 | 1548.7 | 4 | Details |
| 13 | Chess Vikings Trials 2 2025 (D) | Standard | 2025-10-18 | 2025-10-18 | Buffalo City (EBC) | 5 | 1491.7 | 5 | 4 | 1608.8 | 11 | Details |
| 14 | BC Open 2025 (U10-U14) | Rapid | 2025-10-04 | 2025-10-04 | Buffalo City (EBC) | 7 | 1491.7 | 6 | 3 | 1402.9 | -6.7 | Details |
| 15 | Buffalo City Chess Clubs League 2025 (B) | Standard | 2025-09-20 | 2025-09-20 | Buffalo City (EBC) | 6 | 1589.8 | 6 | 2 | 1271.5 | -41.9 | Details |
| 16 | Buffalo City Chess Clubs League 2025 (B) | Standard | 2025-09-20 | 2025-09-20 | Buffalo City (EBC) | 6 | 1589.8 | 6 | 2 | 1271.5 | -41.9 | Details |
| 17 | EC Closed 2025 (U8+U10 Boys) | Standard | 2025-09-06 | 2025-09-07 | Nelson Mandela Bay (ENM) | 6 | 1589.8 | 6 | 4 | 1516.4 | -9.4 | Details |
| 18 | Buffalo City Chess Junior Closed 2025 (U8 Open+Girls) | Standard | 2025-08-16 | 2025-08-16 | Buffalo City (EBC) | 5 | 1525.3 | 5 | 5 | 1738.5 | 20.4 | Details |
| 19 | 3rd Chess Vikings Open Championship 2025 (D) | Standard | 2025-08-02 | 2025-08-02 | Buffalo City (EBC) | 6 | 1525.3 | 6 | 5 | 1574.5 | 6 | Details |
| 20 | BC Schools Chess Festival 2025 (U7) | Standard | 2025-07-26 | 2025-07-26 | Buffalo City (EBC) | 7 | 1525.3 | 6 | 5 | 1530 | 0.8 | Details |
| 21 | Beacon Bay Winter Cup 2025 (C) | Rapid | 2025-07-09 | 2025-07-09 | Buffalo City (EBC) | 6 | 1514 | 6 | 5 | 1603.8 | 7.1 | Details |
| 22 | 2nd Vikings Classical 2025 (D) | Standard | 2025-05-24 | 2025-05-24 | Buffalo City (EBC) | 5 | 1518 | 5 | 4 | 1496.7 | -2.5 | Details |
| 23 | 2025 Buffalo City Chess Trials 3 (U8) | Standard | 2025-05-10 | 2025-05-10 | Buffalo City (EBC) | 5 | 1498.3 | 5 | 5 | 1679.7 | 18.6 | Details |
| 24 | EC Open 2025 (U8-U14 Boys) | Standard | 2025-05-02 | 2025-05-02 | Buffalo City (EBC) | 7 | 1498.3 | 7 | 3 | 1324.5 | -27.4 | Details |
| 25 | Vikings Holiday 2025 (D) | Standard | 2025-04-05 | 2025-04-05 | Buffalo City (EBC) | 6 | 1261.1 | 6 | 4.5 | 1474.7 | 25.1 | Details |
| 26 | 2025 Buffalo City Chess Trials 2 (U8) | Standard | 2025-04-12 | 2025-04-12 | Buffalo City (EBC) | 5 | 1261.1 | 5 | 5 | 1631.2 | 36.9 | Details |
| 27 | 2025 Buffalo City Chess Trials 1 (U8) | Standard | 2025-03-22 | 2025-03-22 | Buffalo City (EBC) | 5 | 1261.1 | 5 | 4 | 1526.8 | 25.2 | Details |
| 28 | Vikings Classical March 2025 (U8) | Standard | 2025-03-15 | 2025-03-15 | Buffalo City (EBC) | 5 | 1212.3 | 5 | 4 | 1483.2 | 27.1 | Details |
| 29 | Rapid Feb 2nd Leg 2025 (U8+U10) | Rapid | 2025-02-22 | 2025-02-22 | Buffalo City (EBC) | 7 | 1191.5 | 7 | 3.5 | 1206.5 | 1.1 | Details |
| 30 | Rapid Feb Leg 1 2025 (U8+U10) | Rapid | 2025-02-15 | 2025-02-15 | Buffalo City (EBC) | 7 | 1191.5 | 7 | 5 | 1378.3 | 10.5 | Details |
| 31 | EL Junior Closed 2024 (U10) | Standard | 2024-11-23 | 2024-11-23 | Buffalo City (EBC) | 5 | 1195.4 | 5 | 1 | 956.1 | -22.6 | Details |
| 32 | East London Open 2024 (C) | Standard | 2024-11-05 | 2024-11-05 | Buffalo City (EBC) | 6 | 1200 | 5 | 2.5 | 1181.6 | -2.3 | Details |
Game statistics ( )
| Games | 4 |
| Wins | 0 |
| Draws | 0 |
| Losses | 4 |
| White | 2 |
| Black | 2 |
| White wins | 0 |
| Black wins | 0 |
| Score | 0 |
| Percent | 0 |
| Dp | -425 |
| AOR | 1427.3 |
| Performance | 1002.3 |
Game statistics ()
| Games | 67 |
| Wins | 39 |
| Draws | 5 |
| Losses | 23 |
| White | 35 |
| Black | 32 |
| White wins | 20 |
| Black wins | 19 |
| Score | 41.5 |
| Percent | 61.9 |
| Dp | 101.5 |
| AOR | 1346.6 |
| Performance | 1448.1 |
Game statistics (History)
| Games | 181 |
| Wins | 112 |
| Draws | 12 |
| Losses | 57 |
| White | 92 |
| Black | 89 |
| White wins | 55 |
| Black wins | 57 |
| Score | 118 |
| Percent | 65.2 |
| Dp | 129.1 |
| AOR | 1311.6 |
| Performance | 1440.7 |
Rankings (Main)
| National | |
| Overall | 1903 |
| Gender | 1678 |
| Age group | 61 |
| Gender/Age | 54 |
| Provincial | |
| Overall | 206 |
| Gender | 180 |
| Age group | 7 |
| Gender/Age | 6 |
| Regional | |
| Overall | 68 |
| Gender | 57 |
| Age group | 4 |
| Gender/Age | 4 |
Rankings (Standard)
| National | |
| Overall | 1537 |
| Gender | 1354 |
| Age group | 52 |
| Gender/Age | 46 |
| Provincial | |
| Overall | 169 |
| Gender | 149 |
| Age group | 6 |
| Gender/Age | 6 |
| Regional | |
| Overall | 60 |
| Gender | 51 |
| Age group | 4 |
| Gender/Age | 4 |
Rankings (Rapid)
| National | |
| Overall | 1318 |
| Gender | 1118 |
| Age group | 70 |
| Gender/Age | 58 |
| Provincial | |
| Overall | 114 |
| Gender | 98 |
| Age group | 5 |
| Gender/Age | 5 |
| Regional | |
| Overall | 46 |
| Gender | 36 |
| Age group | 5 |
| Gender/Age | 5 |
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 | 4 |
| Score | 0 |
| Percent | 0 |
| Aor | 1427.3 |
| Dp | -425 |
| Prat | 1002.3 |
Performance ()
| Games | 67 |
| Score | 41.5 |
| Percent | 61.9 |
| Aor | 1346.6 |
| Dp | 101.5 |
| Prat | 1448.1 |
Performance (12 months)
| Games | 67 |
| Score | 41.5 |
| Percent | 61.9 |
| Aor | 1346.6 |
| Dp | 101.5 |
| Prat | 1448.1 |
Performance (History)
| Games | 181 |
| Score | 118 |
| Percent | 65.2 |
| Aor | 1311.6 |
| Dp | 129.1 |
| Prat | 1440.7 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Makgaila, M (Moagi) | 10 | 5 | 5 | Rapid Feb 2nd Leg 2025 (U8+U10) | 2026 Buffalo City Chess Trials 5 (U10) | Details |
| Overall | 2 | Kapp, M (Michael) | 8 | 5 | 3 | Vikings Classical March 2025 (U8) | 2026 Buffalo City Closed (U10 Boys) | Details |
| Overall | 3 | Mdaka, V (Vuyanathi) | 7 | 4 | 3 | Rapid Feb Leg 1 2025 (U8+U10) | 2026 Buffalo City Closed (U10 Boys) | Details |
| Overall | 4 | Coetzee, N (Niki) | 6 | 3 | 3 | Vikings Classical March 2025 (U8) | 2026 Buffalo City Chess Trials 3 (U10) | Details |
| Overall | 5 | Xu, J (Jiayi) | 6 | 2 | 4 | Rapid Feb 2nd Leg 2025 (U8+U10) | 2026 Buffalo City Chess Trials 1 (U8+U10) | Details |
| Standard | 1 | Makgaila, M (Moagi) | 9 | 4 | 5 | Vikings Classical March 2025 (U8) | 2026 Buffalo City Chess Trials 5 (U10) | Details |
| Standard | 2 | Kapp, M (Michael) | 7 | 4 | 3 | Vikings Classical March 2025 (U8) | 2026 Buffalo City Closed (U10 Boys) | Details |
| Standard | 3 | Coetzee, N (Niki) | 6 | 3 | 3 | Vikings Classical March 2025 (U8) | 2026 Buffalo City Chess Trials 3 (U10) | Details |
| Standard | 4 | Mxabo, S (Sophumelela) | 5 | 3 | 2 | Vikings Classical March 2025 (U8) | 2026 Buffalo City Chess Trials 5 (U10) | Details |
| Standard | 5 | Xu, J (Jiayi) | 5 | 2 | 3 | 2025 Buffalo City Chess Trials 1 (U8) | 2026 Buffalo City Chess Trials 1 (U8+U10) | Details |
| Rapid | 1 | Mazikana, E (Elsie) | 3 | 2 | 1 | Rapid Feb Leg 1 2025 (U8+U10) | Vikings Rapid 2026 (A) | Details |
| Rapid | 2 | Mdaka, V (Vuyanathi) | 3 | 2 | 1 | Rapid Feb Leg 1 2025 (U8+U10) | Beacon Bay Winter Cup 2025 (C) | Details |
| Rapid | 3 | Mtwecu, Y (Yanga) | 2 | 1 | 1 | Vikings April Rapid 2026 (U8+U10) | Beacon Bay Chess Club 2nd Annual Winter Cup 2026 (Foundation) | Details |
| Rapid | 4 | Masoeu, S (Senogo) | 2 | 2 | 0 | BC Open 2025 (U10-U14) | Vikings Rapid 2026 (A) | Details |
| Rapid | 5 | Jikijela, A (Ayana) | 2 | 0 | 2 | Rapid Feb Leg 1 2025 (U8+U10) | Beacon Bay Winter Cup 2025 (C) | Details |