PLAYER PAGE
Haojia Sun
2130191696Cape Town (WCT)Personal
Main rating
| Rating | 1720.2 |
| K-factor | 28 |
| Floor | 1220.2 |
| Highest | 1720.2 (2026-10-01) |
| Min/Max +/- allowed | 79 |
| Rating Change () | |
| Games | 5 |
| Score | 5 |
| We | 4.12 |
| SWe | 0.73 |
| Temp +/- | 20.6 |
| Penalties | 0 |
| Weight perform | 1695.5 |
| Final +/- | +20.6 |
| New Rating () | |
| Rating | 1740.7 |
| K-factor | 28 |
| Floor | 1240.7 |
| Highest | 1740.7 (2026-10-01) |
| Min/Max +/- allowed | 76.7 |
Standard rating
| Rating | 1724.9 |
| K-factor | 28 |
| Floor | 1190.4 |
| Highest | 1746.4 (2024-02-01) |
| Min/Max +/- allowed | 76.1 |
| Rating Change () | |
| Games | 5 |
| Score | 5 |
| We | 4.16 |
| SWe | 0.84 |
| Temp +/- | 23.6 |
| Penalties | 0 |
| Weight perform | 1715.8 |
| Final +/- | +23.6 |
| New Rating () | |
| Rating | 1748.5 |
| K-factor | 28 |
| Floor | 1248.5 |
| Highest | 1748.5 (2026-10-01) |
| Min/Max +/- allowed | 75.9 |
Rapid rating
| Rating | 1543.5 |
| K-factor | 32 |
| Floor | 1049.2 |
| Highest | 1549.2 (2024-12-01) |
| Min/Max +/- allowed | 100.8 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 1367.4 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1543.5 |
| K-factor | 32 |
| Floor | 1049.2 |
| Highest | 1549.2 (2024-12-01) |
| Min/Max +/- allowed | 100.8 |
Blitz rating
| Rating | 1264.8 |
| K-factor | 36 |
| Floor | 764.8 |
| Highest | 1264.8 (2026-04-01) |
| Min/Max +/- allowed | 151.2 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1264.8 |
| K-factor | 36 |
| Floor | 764.8 |
| Highest | 1264.8 (2026-04-01) |
| Min/Max +/- allowed | 151.2 |
Rating Graph
Tournaments
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | CTCF Women's Championship 2026 (U14 Girls) | Standard | 2026-09-24 | 2026-09-24 | Cape Town (WCT) | 5 | 1720.2 | 5 | 5 | 1810.5 | 20.6 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Western Cape - Top Schools 2026 (U13 Mix) | Standard | 2026-09-05 | 2026-09-06 | Cape Winelands (WCW) | 6 | 1720.1 | 6 | 4 | 1719.3 | 0.1 | Details |
| 2 | Central Top Schools 2026 (U13 Mixed) | Standard | 2026-08-01 | 2026-08-02 | Cape Town (WCT) | 5 | 1720.1 | 5 | 5 | 1629.4 | 4.4 | Details |
| 3 | African Chess Academy Invitational 2026 (U12+U14 Open) | Rapid | 2026-07-18 | 2026-07-18 | Cape Town (WCT) | 6 | 1657.2 | 6 | 5 | 1670.6 | 2.3 | Details |
| 4 | South African Open Championship 2026 (U13 Girls) | Classical | 2026-07-02 | 2026-07-05 | Cape Town (WCT) | 7 | 1657.2 | 7 | 6.5 | 1894.2 | 56.1 | Details |
| 5 | CTCF Open Championship 2026 (U14) | Classical | 2026-06-13 | 2026-06-14 | Cape Town (WCT) | 6 | 1666.7 | 6 | 4 | 1615.7 | -9.5 | Details |
| 6 | 2026 WCSC PS Individual Championship (U13 Girls) | Standard | 2026-05-16 | 2026-05-17 | Overberg (WOS) | 6 | 1628 | 6 | 6 | 1861.8 | 38.7 | Details |
| 7 | South African Junior Closed Chess Championship 2026 (U14 Girls) | Classical | 2026-03-28 | 2026-04-02 | Bojanala Platina (NBR) | 9 | 1658.6 | 9 | 5.5 | 1573.3 | -23.5 | Details |
| 8 | South African Junior Closed Chess Championship 2026 (Blitz) | Blitz | 2026-03-31 | 2026-03-31 | Bojanala Platina (NBR) | 9 | 1658.6 | 9 | 5 | 1526.8 | -7 | Details |
| 9 | CT Metro Schools Individual Closed 2026 (U13 Girls) | Standard | 2026-03-07 | 2026-03-08 | Cape Town (WCT) | 6 | 1630.6 | 6 | 6 | 1793.6 | 28 | Details |
| 10 | District Central Schools Chess Individual Trials 2026 (U13 Girls) | Standard | 2026-02-07 | 2026-02-08 | Cape Town (WCT) | 6 | 1602.3 | 6 | 6 | 1822.7 | 18.8 | Details |
| 11 | Kraaifontein Open 2025 (Advanced) | Standard | 2025-12-06 | 2025-12-07 | Cape Town (WCT) | 6 | 1641 | 6 | 2.5 | 1364.7 | -33.8 | Details |
| 12 | Western Cape Schools - Top Schools 2025 (U13) | Standard | 2025-09-06 | 2025-09-07 | Overberg (WOS) | 6 | 1678.6 | 6 | 2.5 | 1459.9 | -26.9 | Details |
| 13 | Cape Town Metro Top Schools District Central 2025 (U13) | Standard | 2025-08-02 | 2025-08-02 | Cape Town (WCT) | 5 | 1676.9 | 4 | 4 | 1640.5 | 1.2 | Details |
| 14 | Western Cape Schools Individual Championship 2025 (U13 Girls) | Standard | 2025-05-17 | 2025-05-18 | Cape Winelands (WCW) | 6 | 1645.8 | 6 | 5.5 | 1790.6 | 17.3 | Details |
| 15 | South African Junior Closed Chess Championships 2025 (U12 Girls) | Classical | 2025-03-31 | 2025-04-05 | Cape Winelands (WCW) | 9 | 1587.5 | 9 | 7 | 1762.9 | 36.4 | Details |
| 16 | Western Cape Closed 2025 (U14) | Standard | 2025-03-08 | 2025-03-09 | Cape Town (WCT) | 6 | 1549.8 | 6 | 5 | 1643.7 | 12.8 | Details |
| 17 | CT Metro Schools Individual Closed 2025 (U13 Girls) | Standard | 2025-03-01 | 2025-03-02 | Cape Town (WCT) | 6 | 1549.8 | 6 | 5 | 1637.5 | 10.8 | Details |
| 18 | Laerskool Welgemoed Rapid 2025 (U14) | Rapid | 2025-02-15 | 2025-02-15 | Cape Town (WCT) | 6 | 1534.2 | 6 | 4 | 1492.8 | -3.4 | Details |
| 19 | 2025 District Central Schools Chess Individual Trials (U13 Girls) | Standard | 2025-01-31 | 2025-02-01 | Cape Town (WCT) | 6 | 1534.2 | 6 | 5.5 | 1637.1 | 13.1 | Details |
| 20 | 2025 Kraaifontein Open Chess Championships (Rapid U14) | Rapid | 2025-01-04 | 2025-01-04 | Cape Town (WCT) | 6 | 1549.4 | 6 | 4 | 1435.2 | -9.5 | Details |
| 21 | Chess Challengers Championship 2024 (U13) | Rapid | 2024-11-23 | 2024-11-23 | Cape Town (WCT) | 6 | 1532.9 | 6 | 6 | 1652 | 10.4 | Details |
| 22 | Western Cape Top Schools Championship 2024 (U13 Mixed) | Standard | 2024-08-30 | 2024-09-01 | Eden (WEG) | 6 | 1475 | 6 | 5.5 | 1783.5 | 36.2 | Details |
| 23 | CT Metro Central District Top Schools 2024 (U13 Mixed) | Rapid | 2024-07-26 | 2024-07-26 | Cape Town (WCT) | 5 | 1457 | 5 | 5 | 1613 | 11.4 | Details |
| 24 | Cape Town Chess Federation Closed Chess Championships 2024 (C) | Classical | 2024-06-15 | 2024-06-17 | Cape Town (WCT) | 6 | 1507.2 | 5 | 1.5 | 1245.5 | -31.4 | Details |
| 25 | PNPS Chess Challengers 2024 (U13) | Rapid | 2024-05-18 | 2024-05-18 | Cape Town (WCT) | 6 | 1418.5 | 6 | 6 | 1683.6 | 22.7 | Details |
| 26 | Steinitz Chess Festival 2024 (Open Rapid) | Rapid | 2024-05-11 | 2024-05-11 | Cape Town (WCT) | 6 | 1418.5 | 6 | 2.5 | 1387.8 | -6.3 | Details |
| 27 | Western Cape PS Individuals Championship 2024 (U11 Girls) | Standard | 2024-05-04 | 2024-05-05 | West Coast (WCU) | 6 | 1418.5 | 6 | 5.5 | 1752.5 | 39.2 | Details |
| 28 | Cape Town Open Chess Championship 2024 (Intermediate) | Standard | 2024-03-16 | 2024-03-17 | Cape Town (WCT) | 6 | 1322.8 | 6 | 2.5 | 1291.2 | -3.8 | Details |
| 29 | Chas Everitt and MHI Attorneys Rapid 2024 (U12) | Rapid | 2024-03-09 | 2024-03-09 | Cape Town (WCT) | 6 | 1322.8 | 6 | 5 | 1607.9 | 21.9 | Details |
| 30 | Cape Town Metro Schools Chess Closed Individuals 2024 (U11 Girls) | Standard | 2024-03-02 | 2024-03-03 | Cape Town (WCT) | 6 | 1322.8 | 6 | 5 | 1625.7 | 35.2 | Details |
| 31 | CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Girls) | Standard | 2024-02-03 | 2024-02-03 | Cape Town (WCT) | 5 | 1206.8 | 5 | 5 | 1728.7 | 51.6 | Details |
| 32 | Cape of Good Hope Open Chess Tournament 2024 (U12) | Rapid | 2024-02-17 | 2024-02-17 | Cape Town (WCT) | 6 | 1206.8 | 5 | 3 | 1398.9 | 13 | Details |
| 33 | Cape Town Chess Club Annual Blitz Championship 2024 | Blitz | 2024-01-07 | 2024-01-07 | Cape Town (WCT) | 9 | 1200 | 9 | 3.5 | 1305.2 | 3.8 | 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 | 71 |
| Wins | 55 |
| Draws | 6 |
| Losses | 10 |
| White | 36 |
| Black | 35 |
| White wins | 28 |
| Black wins | 27 |
| Score | 58 |
| Percent | 81.7 |
| Dp | 269.4 |
| AOR | 1438.5 |
| Performance | 1707.9 |
Game statistics (History)
| Games | 209 |
| Wins | 151 |
| Draws | 16 |
| Losses | 42 |
| White | 108 |
| Black | 101 |
| White wins | 73 |
| Black wins | 78 |
| Score | 159 |
| Percent | 76.1 |
| Dp | 221.7 |
| AOR | 1390 |
| Performance | 1611.7 |
Rankings (Main)
| National | |
| Overall | 491 |
| Gender | 32 |
| Age group | 21 |
| Gender/Age | 1 |
| Provincial | |
| Overall | 150 |
| Gender | 11 |
| Age group | 7 |
| Gender/Age | 1 |
| Regional | |
| Overall | 115 |
| Gender | 8 |
| Age group | 6 |
| Gender/Age | 1 |
Rankings (Standard)
| National | |
| Overall | 437 |
| Gender | 28 |
| Age group | 19 |
| Gender/Age | 1 |
| Provincial | |
| Overall | 134 |
| Gender | 10 |
| Age group | 7 |
| Gender/Age | 1 |
| Regional | |
| Overall | 106 |
| Gender | 8 |
| Age group | 6 |
| Gender/Age | 1 |
Rankings (Rapid)
| National | |
| Overall | 299 |
| Gender | 21 |
| Age group | 36 |
| Gender/Age | 6 |
| Provincial | |
| Overall | 136 |
| Gender | 10 |
| Age group | 19 |
| Gender/Age | 3 |
| Regional | |
| Overall | 79 |
| Gender | 3 |
| Age group | 9 |
| Gender/Age | 1 |
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 | 71 |
| Score | 58 |
| Percent | 81.7 |
| Aor | 1438.5 |
| Dp | 269.4 |
| Prat | 1707.9 |
Performance (12 months)
| Games | 77 |
| Score | 60.5 |
| Percent | 78.6 |
| Aor | 1438.3 |
| Dp | 242.9 |
| Prat | 1681.2 |
Performance (History)
| Games | 209 |
| Score | 159 |
| Percent | 76.1 |
| Aor | 1390 |
| Dp | 221.7 |
| Prat | 1611.7 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Mowlana, K (Khaleela) | 4 | 1 | 3 | CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Girls) | District Central Schools Chess Individual Trials 2026 (U13 Girls) | Details |
| Overall | 2 | Fani, K (Khazimla) | 3 | 2 | 1 | Cape Town Metro Schools Chess Closed Individuals 2024 (U11 Girls) | South African Open Championship 2026 (U13 Girls) | Details |
| Overall | 3 | Cilliers, D (Dene) | 3 | 0 | 3 | Chas Everitt and MHI Attorneys Rapid 2024 (U12) | South African Open Championship 2026 (U13 Girls) | Details |
| Overall | 4 | De Villiers, C (Christiaan) | 3 | 2 | 1 | Cape of Good Hope Open Chess Tournament 2024 (U12) | Laerskool Welgemoed Rapid 2025 (U14) | Details |
| Overall | 5 | Abarder, H (Hanaah) | 3 | 3 | 0 | CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Girls) | District Central Schools Chess Individual Trials 2026 (U13 Girls) | Details |
| Standard | 1 | Mowlana, K (Khaleela) | 4 | 1 | 3 | CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Girls) | District Central Schools Chess Individual Trials 2026 (U13 Girls) | Details |
| Standard | 2 | Abarder, H (Hanaah) | 3 | 3 | 0 | CT Metro Central District Schools Chess Individuals Trials 2024 (U11 Girls) | District Central Schools Chess Individual Trials 2026 (U13 Girls) | Details |
| Standard | 3 | Krige, Z (Zara) | 3 | 1 | 2 | Western Cape PS Individuals Championship 2024 (U11 Girls) | CT Metro Schools Individual Closed 2025 (U13 Girls) | Details |
| Standard | 4 | Pretorius, M (Mia) | 3 | 1 | 2 | Cape Town Metro Schools Chess Closed Individuals 2024 (U11 Girls) | CT Metro Schools Individual Closed 2026 (U13 Girls) | Details |
| Standard | 5 | Temmers, I (Isabella) | 3 | 3 | 0 | South African Junior Closed Chess Championships 2025 (U12 Girls) | South African Open Championship 2026 (U13 Girls) | Details |
| Rapid | 1 | De Villiers, C (Christiaan) | 3 | 2 | 1 | Cape of Good Hope Open Chess Tournament 2024 (U12) | Laerskool Welgemoed Rapid 2025 (U14) | Details |
| Rapid | 2 | Bessesen, J (Joakim) | 2 | 2 | 0 | Chess Challengers Championship 2024 (U13) | Laerskool Welgemoed Rapid 2025 (U14) | Details |