PLAYER PAGE
Jiajia Weng
2140315707Buffalo City (EBC)Personal
Main rating
| Rating | 1405.8 |
| K-factor | 32 |
| Floor | 949.6 |
| Highest | 1507.3 (2025-11-01) |
| Min/Max +/- allowed | 107 |
| Rating Change () | |
| Games | 5 |
| Score | 4 |
| We | 2.97 |
| SWe | 0.86 |
| Temp +/- | 27.7 |
| Penalties | 0 |
| Weight perform | 1452.5 |
| Final +/- | +46.7 |
| New Rating () | |
| Rating | 1452.5 |
| K-factor | 32 |
| Floor | 949.6 |
| Highest | 1507.3 (2025-11-01) |
| Min/Max +/- allowed | 107 |
Standard rating
| Rating | 1396.6 |
| K-factor | 32 |
| Floor | 952.8 |
| Highest | 1516.3 (2025-11-01) |
| Min/Max +/- allowed | 105.7 |
| Rating Change () | |
| Games | 5 |
| Score | 4 |
| We | 2.77 |
| SWe | 1.23 |
| Temp +/- | 39.4 |
| Penalties | 0 |
| Weight perform | 1452.6 |
| Final +/- | +56.1 |
| New Rating () | |
| Rating | 1452.6 |
| K-factor | 32 |
| Floor | 952.8 |
| Highest | 1516.3 (2025-11-01) |
| Min/Max +/- allowed | 105.7 |
Rapid rating
| Rating | 1372.8 |
| K-factor | 36 |
| Floor | 872.8 |
| Highest | 1372.8 (2026-09-01) |
| Min/Max +/- allowed | 129.6 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1350.8 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1372.8 |
| K-factor | 36 |
| Floor | 872.8 |
| Highest | 1372.8 (2026-09-01) |
| Min/Max +/- allowed | 129.6 |
Blitz rating
| Rating | 1200 |
| K-factor | 36 |
| Floor | 700 |
| Highest | 1200 (2025-03-01) |
| 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 (2025-03-01) |
| 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 (C) | Standard | 2026-10-03 | 2026-10-03 | Buffalo City (EBC) | 5 | 1405.8 | 5 | 4 | 1587.2 | 27.7 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Beacon Bay Chess Club 2nd Annual Winter Cup 2026 (Intermediate) | Rapid | 2026-08-29 | 2026-08-29 | Buffalo City (EBC) | 6 | 1405.8 | 6 | 4 | 1443 | 8.1 | Details |
| 2 | 2026 Buffalo City Closed (U14 Girls) | Standard | 2026-08-08 | 2026-08-08 | Buffalo City (EBC) | 5 | 1405.8 | 5 | 3.5 | 1512.2 | 19.9 | Details |
| 3 | 2026 Buffalo City Chess Trials 5 (U14) | Standard | 2026-07-11 | 2026-07-11 | Buffalo City (EBC) | 5 | 1369.4 | 5 | 3 | 1429.9 | 8.4 | Details |
| 4 | 2026 Buffalo City Chess Trials 4 (U14) | Standard | 2026-05-30 | 2026-05-30 | Buffalo City (EBC) | 5 | 1396.8 | 5 | 3 | 1365 | -3.7 | Details |
| 5 | Spartans Bishops 2026 (Bishops) | Standard | 2026-05-01 | 2026-05-01 | Sarah Baartman (ESB) | 5 | 1396.8 | 5 | 2 | 1283.9 | -18.9 | Details |
| 6 | Vikings April Rapid 2026 (U14) | Rapid | 2026-04-18 | 2026-04-18 | Buffalo City (EBC) | 5 | 1396.8 | 5 | 3 | 1408.1 | 0.6 | Details |
| 7 | Hudson Park Primary Festival 2026 (U14) | Standard | 2026-03-07 | 2026-03-07 | Buffalo City (EBC) | 5 | 1432.2 | 5 | 3 | 1353.1 | -11 | Details |
| 8 | Eastern Cape Open 2026 (U8-U14 Girls) | Standard | 2026-04-11 | 2026-04-12 | Buffalo City (EBC) | 7 | 1432.2 | 7 | 4 | 1393.9 | -10.5 | Details |
| 9 | 2026 Buffalo City Chess Trials 3 (U14) | Standard | 2026-03-21 | 2026-03-21 | Buffalo City (EBC) | 5 | 1419.3 | 5 | 3 | 1405.5 | -3.1 | Details |
| 10 | Vikings Rapid 2026 (A) | Rapid | 2026-02-21 | 2026-02-21 | Buffalo City (EBC) | 8 | 1419.3 | 7 | 2.5 | 1383.2 | -4.3 | Details |
| 11 | 2026 Buffalo City Chess Trials 2 (U14 Girls) | Standard | 2026-02-28 | 2026-02-28 | Buffalo City | 5 | 1419.3 | 4 | 3 | 1581.3 | 20.3 | Details |
| 12 | 2026 Buffalo City Chess Trials 1 (U14) | Standard | 2026-02-07 | 2026-02-07 | Buffalo City (EBC) | 5 | 1459.2 | 5 | 3 | 1312.1 | -14.8 | Details |
| 13 | Chess Vikings Trials 2 2025 (C) | Standard | 2025-10-18 | 2025-10-18 | Buffalo City (EBC) | 5 | 1492.6 | 5 | 3.5 | 1565.7 | 6.5 | Details |
| 14 | BC Open 2025 (U10-U14) | Rapid | 2025-10-04 | 2025-10-04 | Buffalo City (EBC) | 7 | 1492.6 | 7 | 5 | 1527 | 3.7 | Details |
| 15 | Buffalo City Chess Clubs League 2025 (B) | Standard | 2025-09-20 | 2025-09-20 | Buffalo City (EBC) | 6 | 1454 | 4 | 1 | 1100 | -29.7 | Details |
| 16 | EC Closed 2025 (U12 Girls) | Standard | 2025-09-06 | 2025-09-07 | Nelson Mandela Bay (ENM) | 6 | 1454 | 6 | 4.5 | 1570.6 | 15.6 | Details |
| 17 | Buffalo City Chess Junior Closed 2025 (U12 Girls) | Standard | 2025-08-16 | 2025-08-16 | Buffalo City (EBC) | 5 | 1416.7 | 5 | 4 | 1638 | 22.4 | Details |
| 18 | 3rd Chess Vikings Open Championship 2025 (C) | Standard | 2025-08-02 | 2025-08-02 | Buffalo City (EBC) | 6 | 1416.7 | 6 | 3 | 1298.8 | -13.6 | Details |
| 19 | BC Schools Chess Festival 2025 (U11 Girls) | Standard | 2025-07-26 | 2025-07-26 | Buffalo City (EBC) | 5 | 1416.7 | 5 | 4 | 1544.2 | 12 | Details |
| 20 | Beacon Bay Winter Cup 2025 (B) | Rapid | 2025-07-09 | 2025-07-09 | Buffalo City (EBC) | 6 | 1414.9 | 6 | 4 | 1428 | 1.1 | Details |
| 21 | 2nd Vikings Classical 2025 (C) | Standard | 2025-05-24 | 2025-05-24 | Buffalo City (EBC) | 5 | 1431.1 | 5 | 3 | 1332.7 | -10.1 | Details |
| 22 | 2025 Buffalo City Chess Trials 3 (U12) | Standard | 2025-05-10 | 2025-05-10 | Buffalo City (EBC) | 5 | 1358.2 | 5 | 4 | 1645.3 | 28.7 | Details |
| 23 | EC Open 2025 (U8-U14 Girls) | Standard | 2025-05-02 | 2025-05-02 | Buffalo City (EBC) | 7 | 1358.2 | 7 | 3.5 | 1288.2 | -11.4 | Details |
| 24 | Vikings Holiday 2025 (C) | Standard | 2025-04-05 | 2025-04-05 | Buffalo City (EBC) | 5 | 1270.2 | 4 | 3.5 | 1477.6 | 16.3 | Details |
| 25 | 2025 Buffalo City Chess Trials 2 (U12) | Standard | 2025-04-12 | 2025-04-12 | Buffalo City (EBC) | 5 | 1270.2 | 5 | 3 | 1353.3 | 7.5 | Details |
| 26 | 2025 Buffalo City Chess Trials 1 (U12) | Standard | 2025-03-22 | 2025-03-22 | Buffalo City (EBC) | 5 | 1270.2 | 5 | 3 | 1346.1 | 6.8 | Details |
| 27 | Vikings Classical March 2025 (U12) | Standard | 2025-03-15 | 2025-03-15 | Buffalo City (EBC) | 5 | 1255.1 | 5 | 3 | 1333.9 | 8.5 | Details |
| 28 | Hudson League 1 2025 | Standard | 2025-02-10 | 2025-02-13 | Buffalo City (EBC) | 6 | 1200 | 6 | 3 | 1267.4 | 7.8 | Details |
| 29 | Rapid Feb 2nd Leg 2025 (U12) | Rapid | 2025-02-22 | 2025-02-22 | Buffalo City (EBC) | 7 | 1200 | 7 | 4 | 1307 | 6.1 | Details |
| 30 | Rapid Feb Leg 1 2025 (U12) | Rapid | 2025-02-15 | 2025-02-15 | Buffalo City (EBC) | 7 | 1200 | 7 | 4 | 1302.3 | 5.8 | Details |
| 31 | Hudson League 1 2023 | Standard | 2025-02-10 | 2025-02-13 | Buffalo City (EBC) | 6 | 1200 | 6 | 3 | 1267.4 | 7.8 | Details |
Game statistics ( )
| Games | 5 |
| Wins | 4 |
| Draws | 0 |
| Losses | 1 |
| White | 3 |
| Black | 2 |
| White wins | 2 |
| Black wins | 2 |
| Score | 4 |
| Percent | 80 |
| Dp | 255 |
| AOR | 1332.2 |
| Performance | 1587.2 |
Game statistics ()
| Games | 69 |
| Wins | 40 |
| Draws | 2 |
| Losses | 27 |
| White | 38 |
| Black | 31 |
| White wins | 20 |
| Black wins | 20 |
| Score | 41 |
| Percent | 59.4 |
| Dp | 80.1 |
| AOR | 1336 |
| Performance | 1416 |
Game statistics (History)
| Games | 175 |
| Wins | 103 |
| Draws | 8 |
| Losses | 64 |
| White | 90 |
| Black | 85 |
| White wins | 48 |
| Black wins | 55 |
| Score | 107 |
| Percent | 61.1 |
| Dp | 94.7 |
| AOR | 1309.7 |
| Performance | 1404.5 |
Rankings (Main)
| National | |
| Overall | 3479 |
| Gender | 530 |
| Age group | 421 |
| Gender/Age | 114 |
| Provincial | |
| Overall | 385 |
| Gender | 56 |
| Age group | 53 |
| Gender/Age | 17 |
| Regional | |
| Overall | 126 |
| Gender | 23 |
| Age group | 18 |
| Gender/Age | 5 |
Rankings (Standard)
| National | |
| Overall | 3251 |
| Gender | 545 |
| Age group | 424 |
| Gender/Age | 127 |
| Provincial | |
| Overall | 362 |
| Gender | 57 |
| Age group | 54 |
| Gender/Age | 18 |
| Regional | |
| Overall | 124 |
| Gender | 23 |
| Age group | 18 |
| Gender/Age | 5 |
Rankings (Rapid)
| National | |
| Overall | 1206 |
| Gender | 181 |
| Age group | 217 |
| Gender/Age | 56 |
| Provincial | |
| Overall | 102 |
| Gender | 13 |
| Age group | 14 |
| Gender/Age | 5 |
| Regional | |
| Overall | 41 |
| Gender | 8 |
| Age group | 8 |
| 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 | 5 |
| Score | 4 |
| Percent | 80 |
| Aor | 1332.2 |
| Dp | 255 |
| Prat | 1587.2 |
Performance ()
| Games | 69 |
| Score | 41 |
| Percent | 59.4 |
| Aor | 1336 |
| Dp | 80.1 |
| Prat | 1416 |
Performance (12 months)
| Games | 69 |
| Score | 41 |
| Percent | 59.4 |
| Aor | 1336 |
| Dp | 80.1 |
| Prat | 1416 |
Performance (History)
| Games | 175 |
| Score | 107 |
| Percent | 61.1 |
| Aor | 1309.7 |
| Dp | 94.7 |
| Prat | 1404.5 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Tayi, M (Milani) | 6 | 2 | 4 | Rapid Feb 2nd Leg 2025 (U12) | Beacon Bay Chess Club 2nd Annual Winter Cup 2026 (Intermediate) | Details |
| Overall | 2 | Lin, Y (Yihang) | 5 | 3 | 2 | Hudson League 1 2023 | Hudson Park Primary Festival 2026 (U14) | Details |
| Overall | 3 | Maciki, I (Ibenathi) | 4 | 2 | 2 | Vikings Classical March 2025 (U12) | 2026 Buffalo City Closed (U14 Girls) | Details |
| Overall | 4 | Lufuso, M (Milisa) | 4 | 3 | 1 | Beacon Bay Winter Cup 2025 (B) | 2026 Buffalo City Closed (U14 Girls) | Details |
| Overall | 5 | Yaphi, I (Imthande) | 4 | 3 | 1 | Buffalo City Chess Junior Closed 2025 (U12 Girls) | 2026 Buffalo City Closed (U14 Girls) | Details |
| Standard | 1 | Lin, Y (Yihang) | 4 | 2 | 2 | Hudson League 1 2023 | Hudson Park Primary Festival 2026 (U14) | Details |
| Standard | 2 | Maciki, I (Ibenathi) | 4 | 2 | 2 | Vikings Classical March 2025 (U12) | 2026 Buffalo City Closed (U14 Girls) | Details |
| Standard | 3 | Yaphi, I (Imthande) | 4 | 3 | 1 | Buffalo City Chess Junior Closed 2025 (U12 Girls) | 2026 Buffalo City Closed (U14 Girls) | Details |
| Standard | 4 | Dikane, A (Akhelethu) | 3 | 2 | 1 | 2025 Buffalo City Chess Trials 3 (U12) | 2026 Buffalo City Chess Trials 5 (U14) | Details |
| Standard | 5 | Majiza, I (Isandisele) | 3 | 3 | 0 | 2026 Buffalo City Chess Trials 3 (U14) | 2026 Buffalo City Closed (U14 Girls) | Details |
| Rapid | 1 | Tayi, M (Milani) | 3 | 1 | 2 | Rapid Feb 2nd Leg 2025 (U12) | Beacon Bay Chess Club 2nd Annual Winter Cup 2026 (Intermediate) | Details |
| Rapid | 2 | Wood, S (Sebastian) | 2 | 1 | 1 | Rapid Feb 2nd Leg 2025 (U12) | Vikings Rapid 2026 (A) | Details |
| Rapid | 3 | Harman, R (Ryan) | 2 | 2 | 0 | BC Open 2025 (U10-U14) | Vikings Rapid 2026 (A) | Details |
| Rapid | 4 | Matabata, O (Othawe) | 2 | 0 | 2 | Rapid Feb Leg 1 2025 (U12) | Rapid Feb 2nd Leg 2025 (U12) | Details |
| Rapid | 5 | Lin, Y (Yifan) | 2 | 1 | 1 | Rapid Feb Leg 1 2025 (U12) | Rapid Feb 2nd Leg 2025 (U12) | Details |