PLAYER PAGE
Thalia Anne Costa
2180314648Eden (WEG)Personal
Main rating
| Rating | 1246.5 |
| K-factor | 36 |
| Floor | 746.5 |
| Highest | 1246.5 (2026-02-28) |
| Min/Max +/- allowed | 155 |
| Rating Change () | |
| Games | 5 |
| Score | 3 |
| We | 2.43 |
| SWe | 0.48 |
| Temp +/- | 17.2 |
| Penalties | 0 |
| Weight perform | 1265.8 |
| Final +/- | 19.3 |
| New Rating () | |
| Rating | 1265.8 |
| K-factor | 36 |
| Floor | 765.8 |
| Highest | 1265.8 (2026-03-01) |
| Min/Max +/- allowed | 151 |
Standard rating
| Rating | 1245.8 |
| K-factor | 36 |
| Floor | 745.8 |
| Highest | 1245.8 (2026-02-28) |
| Min/Max +/- allowed | 155.4 |
| Rating Change () | |
| Games | 5 |
| Score | 3 |
| We | 2.32 |
| SWe | 0.68 |
| Temp +/- | 24.6 |
| Penalties | 0 |
| Weight perform | 1248.9 |
| Final +/- | 24.6 |
| New Rating () | |
| Rating | 1270.3 |
| K-factor | 36 |
| Floor | 770.3 |
| Highest | 1270.3 (2026-03-01) |
| Min/Max +/- allowed | 150 |
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 | 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 |
| # | Tournament | Type | Start | End | Host | Rounds | Rating | Games | Score | Perform | Rat+/- | Details |
| 1 | George Trials 2 2026 (U9 Girls) | Standard | 2026-02-14 | 2026-02-14 | Eden (WEG) | 5 | 1232 | 4 | 1.5 | 1143.4 | 0 | Details |
| 2 | George Trials 1 2026 (U9 Girls) | Standard | 2026-01-31 | 2026-01-31 | Eden (WEG) | 5 | 1232 | 5 | 3 | 1379.5 | 0 | Details |
| 3 | Voories Skaaktoernooi 2025 (O7) | Rapid | 2025-11-08 | 2025-11-08 | Eden (WEG) | 5 | 1220.7 | 5 | 2.5 | 1313.1 | 0 | Details |
| 4 | Western Cape Schools - Top Schools 2025 (U7) | Standard | 2025-09-06 | 2025-09-07 | Overberg (WOS) | 6 | 1199.7 | 5 | 3 | 1314.8 | 0 | Details |
| 5 | George Schools Chess Trials 3 2025 (U7 Girls) | Standard | 2025-03-01 | 2025-03-01 | Eden (WEG) | 5 | 1198.8 | 4 | 1 | 1013.3 | 0 | Details |
| 6 | George Schools Chess Trials 1 2025 (U7 Gils) | Standard | 2025-02-01 | 2025-02-01 | Eden (WEG) | 5 | 1200 | 5 | 2 | 1115 | 0 | 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 | 14 |
| Wins | 7 |
| Draws | 1 |
| Losses | 6 |
| White | 6 |
| Black | 8 |
| White wins | 2 |
| Black wins | 5 |
| Score | 7.5 |
| Percent | 53.6 |
| Dp | 30.4 |
| AOR | 1266.6 |
| Performance | 1296.9 |
Game statistics (History)
| Games | 33 |
| Wins | 15 |
| Draws | 2 |
| Losses | 16 |
| White | 15 |
| Black | 18 |
| White wins | 6 |
| Black wins | 9 |
| Score | 16 |
| Percent | 48.5 |
| Dp | -12.9 |
| AOR | 1253 |
| Performance | 1240.1 |
Rankings (Main)
| National | |
| Overall | 8606 |
| Gender | 1633 |
| Age group | 311 |
| Gender/Age | 73 |
| Provincial | |
| Overall | 2480 |
| Gender | 562 |
| Age group | 118 |
| Gender/Age | 28 |
| Regional | |
| Overall | 590 |
| Gender | 149 |
| Age group | 48 |
| Gender/Age | 15 |
Rankings (Standard)
| National | |
| Overall | 7415 |
| Gender | 1474 |
| Age group | 297 |
| Gender/Age | 78 |
| Provincial | |
| Overall | 2075 |
| Gender | 509 |
| Age group | 116 |
| Gender/Age | 33 |
| Regional | |
| Overall | 565 |
| Gender | 152 |
| Age group | 54 |
| Gender/Age | 18 |
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 | 14 |
| Score | 7.5 |
| Percent | 53.6 |
| Aor | 1266.6 |
| Dp | 30.4 |
| Prat | 1296.9 |
Performance (12 months)
| Games | 24 |
| Score | 13 |
| Percent | 54.2 |
| Aor | 1268.6 |
| Dp | 35.4 |
| Prat | 1304 |
Performance (History)
| Games | 33 |
| Score | 16 |
| Percent | 48.5 |
| Aor | 1253 |
| Dp | -12.9 |
| Prat | 1240.1 |
Top 5 opponents most often played
| Type | # | Opponent | Games | White | Black | First tournament | Last tournament | Details |
| Overall | 1 | Rostoll, C (Chante) | 2 | 2 | 0 | George Schools Chess Trials 1 2025 (U7 Gils) | George Schools Chess Trials 3 2025 (U7 Girls) | Details |
| Overall | 2 | Nduku, N (Nathiera) | 2 | 2 | 0 | George Trials 1 2026 (U9 Girls) | George Trials 3 2026 (U9 Girls) | Details |
| Overall | 3 | Anthony, A (Avia) | 2 | 2 | 0 | George Schools Chess Trials 3 2025 (U7 Girls) | Voories Skaaktoernooi 2025 (O7) | Details |
| Overall | 4 | Ruiters, Z (Zayaan) | 2 | 1 | 1 | George Schools Chess Trials 3 2025 (U7 Girls) | Voories Skaaktoernooi 2025 (O7) | Details |
| Overall | 5 | Vlietstra, L (Lily) | 2 | 1 | 1 | George Schools Chess Trials 1 2025 (U7 Gils) | George Trials 1 2026 (U9 Girls) | Details |
| Standard | 1 | Nduku, N (Nathiera) | 2 | 2 | 0 | George Trials 1 2026 (U9 Girls) | George Trials 3 2026 (U9 Girls) | Details |
| Standard | 2 | Maarman, R (Ryleigh) | 2 | 1 | 1 | Western Cape Schools - Top Schools 2025 (U7) | George Trials 2 2026 (U9 Girls) | Details |
| Standard | 3 | Vlietstra, L (Lily) | 2 | 1 | 1 | George Schools Chess Trials 1 2025 (U7 Gils) | George Trials 1 2026 (U9 Girls) | Details |
| Standard | 4 | Rostoll, C (Chante) | 2 | 2 | 0 | George Schools Chess Trials 1 2025 (U7 Gils) | George Schools Chess Trials 3 2025 (U7 Girls) | Details |