Surname or Chess SA id..
Chess SA Region AOC

PLAYER PAGE

Thalia Anne Costa

2180314648
Eden (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 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1272.8
Final +/- 0
New Rating
()
Rating 1281.7
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 0
Score 0
We 0
SWe 0
Temp +/- 0
Penalties 0
Weight perform 1275.6
Final +/- 0
New Rating
()
Rating 1289.8
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
No tournaments found.
# Tournament Type Start End Host Rounds Rating Games Score Perform Rat+/- 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 19
Wins 10
Draws 1
Losses 8
White 8
Black 11
White wins 4
Black wins 6
Score 10.5
Percent 55.3
Dp 44.7
AOR 1261
Performance 1305.7
Game statistics (History)
Games 38
Wins 18
Draws 2
Losses 18
White 17
Black 21
White wins 8
Black wins 10
Score 19
Percent 50
Dp 0
AOR 1252
Performance 1252
Rankings (Main)
National
Overall 6961
Gender 1275
Age group 279
Gender/Age 69
Provincial
Overall 2114
Gender 486
Age group 114
Gender/Age 34
Regional
Overall 527
Gender 134
Age group 49
Gender/Age 17
Rankings (Standard)
National
Overall 5897
Gender 1109
Age group 242
Gender/Age 65
Provincial
Overall 1728
Gender 417
Age group 96
Gender/Age 29
Regional
Overall 480
Gender 125
Age group 50
Gender/Age 16
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 19
Score 10.5
Percent 55.3
Aor 1261
Dp 44.7
Prat 1305.7
Performance (12 months)
Games 29
Score 16
Percent 55.2
Aor 1264.6
Dp 44
Prat 1308.6
Performance (History)
Games 38
Score 19
Percent 50
Aor 1252
Dp 0
Prat 1252
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 Nduku, N (Nathiera) 2 2 0 George Trials 1 2026 (U9 Girls) George Trials 3 2026 (U9 Girls) Details
Overall 5 Anthony, A (Avia) 2 2 0 George Schools Chess Trials 3 2025 (U7 Girls) Voories Skaaktoernooi 2025 (O7) 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 Rostoll, C (Chante) 2 2 0 George Schools Chess Trials 1 2025 (U7 Gils) George Schools Chess Trials 3 2025 (U7 Girls) Details
Standard 3 Nduku, N (Nathiera) 2 2 0 George Trials 1 2026 (U9 Girls) George Trials 3 2026 (U9 Girls) Details
Standard 4 Maarman, R (Ryleigh) 2 1 1 Western Cape Schools - Top Schools 2025 (U7) George Trials 2 2026 (U9 Girls) Details
Standard 5 Ruiters, Z (Zayaan) 2 0 2 George Schools Chess Trials 3 2025 (U7 Girls) Eden Schools Trials 1 2026 (U9 Girls) Details