PLAYER PAGE
Thalia Anne Costa
2180314648Eden (WEG)Personal
Main rating
| Rating | 1281.7 |
| K-factor | 36 |
| Floor | 781.7 |
| Highest | 1281.7 (2026-03-01) |
| Min/Max +/- allowed | 148 |
| Rating Change () | |
| Games | 5 |
| Score | 2 |
| We | 2.9 |
| SWe | -0.75 |
| Temp +/- | -26.9 |
| Penalties | 0 |
| Weight perform | 1214.4 |
| Final +/- | -26.9 |
| New Rating () | |
| Rating | 1254.7 |
| K-factor | 36 |
| Floor | 781.7 |
| Highest | 1281.7 (2026-03-01) |
| Min/Max +/- allowed | 147.6 |
Standard rating
| Rating | 1289.8 |
| K-factor | 36 |
| Floor | 789.8 |
| Highest | 1289.8 (2026-03-01) |
| Min/Max +/- allowed | 145.9 |
| Rating Change () | |
| Games | 5 |
| Score | 2 |
| We | 2.94 |
| SWe | -0.94 |
| Temp +/- | -34 |
| Penalties | 0 |
| Weight perform | 1214.4 |
| Final +/- | -34 |
| New Rating () | |
| Rating | 1255.9 |
| K-factor | 36 |
| Floor | 789.8 |
| Highest | 1289.8 (2026-03-01) |
| Min/Max +/- allowed | 145.9 |
Rapid rating
| Rating | 1201.8 |
| K-factor | 36 |
| Floor | 701.8 |
| Highest | 1201.8 (2025-11-30) |
| Min/Max +/- allowed | 165.4 |
| Rating Change () | |
| Games | 0 |
| Score | 0 |
| We | 0 |
| SWe | 0 |
| Temp +/- | 0 |
| Penalties | 0 |
| Weight perform | 0 |
| Final +/- | 0 |
| New Rating () | |
| Rating | 1201.8 |
| K-factor | 36 |
| Floor | 701.8 |
| Highest | 1201.8 (2025-11-30) |
| Min/Max +/- allowed | 165.4 |
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 | Eden Chess Trials 2 2026 (U10 Girls) | Standard | 2026-05-23 | 2026-05-23 | Eden (WEG) | 5 | 1281.7 | 5 | 2 | 1120.4 | -26.9 | Details |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | Eden Schools Trials 1 2026 (U9 Girls) | Standard | 2026-03-14 | 2026-03-14 | Eden (WEG) | 5 | 1246.5 | 5 | 3 | 1330.4 | 16 | Details |
| 2 | George Trials 3 2026 (U9 Girls) | Standard | 2026-02-28 | 2026-02-28 | Eden (WEG) | 5 | 1246.5 | 5 | 3 | 1337.1 | 17.2 | Details |
| 3 | George Trials 2 2026 (U9 Girls) | Standard | 2026-02-14 | 2026-02-14 | Eden (WEG) | 5 | 1232 | 4 | 1.5 | 1143.4 | -6.8 | Details |
| 4 | George Trials 1 2026 (U9 Girls) | Standard | 2026-01-31 | 2026-01-31 | Eden (WEG) | 5 | 1232 | 5 | 3 | 1379.5 | 8.7 | Details |
| 5 | Voories Skaaktoernooi 2025 (O7) | Rapid | 2025-11-08 | 2025-11-08 | Eden (WEG) | 5 | 1220.7 | 5 | 2.5 | 1313.1 | 6.3 | Details |
| 6 | Western Cape Schools - Top Schools 2025 (U7) | Standard | 2025-09-06 | 2025-09-07 | Overberg (WOS) | 6 | 1199.7 | 5 | 3 | 1314.8 | 10.5 | Details |
| 7 | George Schools Chess Trials 3 2025 (U7 Girls) | Standard | 2025-03-01 | 2025-03-01 | Eden (WEG) | 5 | 1198.8 | 4 | 1 | 1013.3 | -14.4 | Details |
| 8 | George Schools Chess Trials 1 2025 (U7 Gils) | Standard | 2025-02-01 | 2025-02-01 | Eden (WEG) | 5 | 1200 | 5 | 2 | 1115 | -7.6 | 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 | 24 |
| Wins | 12 |
| Draws | 1 |
| Losses | 11 |
| White | 10 |
| Black | 14 |
| White wins | 5 |
| Black wins | 7 |
| Score | 12.5 |
| Percent | 52.1 |
| Dp | 17.7 |
| AOR | 1249.4 |
| Performance | 1267.1 |
Game statistics (History)
| Games | 43 |
| Wins | 20 |
| Draws | 2 |
| Losses | 21 |
| White | 19 |
| Black | 24 |
| White wins | 9 |
| Black wins | 11 |
| Score | 21 |
| Percent | 48.8 |
| Dp | -9.9 |
| AOR | 1246.6 |
| Performance | 1236.7 |
Rankings (Main)
| National | |
| Overall | 7202 |
| Gender | 1332 |
| Age group | 328 |
| Gender/Age | 82 |
| Provincial | |
| Overall | 2114 |
| Gender | 475 |
| Age group | 126 |
| Gender/Age | 34 |
| Regional | |
| Overall | 510 |
| Gender | 122 |
| Age group | 44 |
| Gender/Age | 13 |
Rankings (Standard)
| National | |
| Overall | 6025 |
| Gender | 1149 |
| Age group | 288 |
| Gender/Age | 75 |
| Provincial | |
| Overall | 1737 |
| Gender | 421 |
| Age group | 110 |
| Gender/Age | 34 |
| Regional | |
| Overall | 454 |
| Gender | 114 |
| Age group | 46 |
| Gender/Age | 13 |
Rankings (Rapid)
| 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 |
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 | 24 |
| Score | 12.5 |
| Percent | 52.1 |
| Aor | 1249.4 |
| Dp | 17.7 |
| Prat | 1267.1 |
Performance (12 months)
| Games | 34 |
| Score | 18 |
| Percent | 52.9 |
| Aor | 1255.9 |
| Dp | 25 |
| Prat | 1280.9 |
Performance (History)
| Games | 43 |
| Score | 21 |
| Percent | 48.8 |
| Aor | 1246.6 |
| Dp | -9.9 |
| Prat | 1236.7 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Ruiters, Z (Zayaan) | 3 | 1 | 2 | George Schools Chess Trials 3 2025 (U7 Girls) | Eden Schools Trials 1 2026 (U9 Girls) | Details |
| Overall | 2 | Vlietstra, L (Lily) | 3 | 1 | 2 | George Schools Chess Trials 1 2025 (U7 Gils) | Eden Schools Trials 1 2026 (U9 Girls) | Details |
| Overall | 3 | Rostoll, C (Chante) | 2 | 2 | 0 | George Schools Chess Trials 1 2025 (U7 Gils) | George Schools Chess Trials 3 2025 (U7 Girls) | Details |
| Overall | 4 | Maarman, R (Ryleigh) | 2 | 1 | 1 | Western Cape Schools - Top Schools 2025 (U7) | George Trials 2 2026 (U9 Girls) | Details |
| Overall | 5 | Nduku, N (Nathiera) | 2 | 2 | 0 | George Trials 1 2026 (U9 Girls) | George Trials 3 2026 (U9 Girls) | Details |
| Standard | 1 | Vlietstra, L (Lily) | 3 | 1 | 2 | George Schools Chess Trials 1 2025 (U7 Gils) | Eden Schools Trials 1 2026 (U9 Girls) | Details |
| Standard | 2 | Ruiters, Z (Zayaan) | 2 | 0 | 2 | George Schools Chess Trials 3 2025 (U7 Girls) | Eden Schools Trials 1 2026 (U9 Girls) | Details |
| Standard | 3 | Maarman, R (Ryleigh) | 2 | 1 | 1 | Western Cape Schools - Top Schools 2025 (U7) | George Trials 2 2026 (U9 Girls) | Details |
| Standard | 4 | Nduku, N (Nathiera) | 2 | 2 | 0 | George Trials 1 2026 (U9 Girls) | George Trials 3 2026 (U9 Girls) | Details |
| Standard | 5 | Rostoll, C (Chante) | 2 | 2 | 0 | George Schools Chess Trials 1 2025 (U7 Gils) | George Schools Chess Trials 3 2025 (U7 Girls) | Details |