CChessStats

XIV Pan-American School Chess Championship 2025 STD U11 Girls

Open SwissStandard

15 players participated in this 9-round tournament, held from 30 Aug 2025 to 05 Sept 2025 in Florianopolis SC, Brazil. 3 titled players from 6 federations. Top 10 Elo average was 1387, and top seed was Kara Chan (🇨🇦 CAN, WCM, 1739).

Kara Chan (🇨🇦 CAN, WCM, 1739) won with 8.0/9, ahead of Koharu Aize Torres Arambulo (8.0) and Maria Eduarda Mazzaroppi Lisboa (6.0). Chan shared the lead from round 6, winning on tie-break.

The biggest upset came in round 6: Kelsy Johana Vera Toro (1558) beat Koharu Aize Torres Arambulo (WCM, 1726), a +168-point gap.

Location
🇧🇷Florianopolis SC, Brazil
Dates
30 Aug 2025 → 05 Sept 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss · 9 rounds
Top seed
🇨🇦WCMKara Chan1739
Avg top 10
1,387
Participants
15
Titled players · 3
WCM×3
Federations · 6 represented
🇧🇷Brazil×5
🇪🇨Ecuador×2
🇵🇪Peru×2
🇨🇦Canada×1
🇲🇽Mexico×1
🇨🇷Costa Rica×1
Top 3

How it unfolded

Top 6 · 9 rounds

Tight race until R9; 2 players tied at 8.0/9, decided on Buchholz.

Co-leaders
6
4
2
1
1
2
2
2
2
2.54.579R1R2R3R4R5R6R7R8R9
R9 · TIEBREAK CLUSTER

2 players finish on 8.0/9. Chan takes the title on Buchholz Cut1 (39.5).

R4 · HEAD-TO-HEAD · WINNER VS 2ND

WCM Kara Chan lost to WCM Koharu Aize Torres Arambulo (Black).

WIN STREAKS · 3 top finishers

WCM Kara Chan 3+5 wins (R1–R3, R5–R9)WCM Koharu Aize Torres Arambulo 5+3 wins (R1–R5, R7–R9)Maria Eduarda Mazzaroppi Lisboa 4 wins (R6–R9)

Key matchups · top 4

Head-to-head between the four finishers

Grille américaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΔ
1Chan, KaraWCM1739CAN+10B+8N+3B2N+5B+7N+4B+9N+6B8.039.542.534.501847+31.2
2Torres Arambulo, Koharu AizeWCM1726PER+13N+5B+7N+1B+3B4N+8B+6B+9N8.039.542.037.001833+30.0
3Lisboa, Maria Eduarda Mazzaroppi1524BRAF+11B1N+9B2N+5N+7B+4N+14N6.038.038.022.001690+52.0
4Vera Toro, Kelsy Johana1558ECU+6N+9B5N7B+10N+2B1N3B+15B5.041.542.519.501492-27.2
5Chueca Balcazar, Adriana Rafaela1478PER+14B2N+4B+11N1N3BF+8N+7B5.040.040.018.001571+21.6
6Aulicino, Ana Helena Leite0BRA4B+12N=8B+14N7N+13B+10B2N1N4.537.539.512.5013640.0
7Fernandez Mayorga, ElenaWCM1457CRC+12B+10N2B+4N+6B1B3NF5N4.042.542.515.501455+12.4
8Gaona Garrido, Estefania1483MEX+15N1B=6N=12B+9N+11B2N5BF4.035.535.510.751415-14.4
9Fiallos Garces, Camila Isabel1465ECUF4N+15B3N8B+14N+13N1B2B3.036.536.55.50805-64.8
10Naidon, Rafaela Weber1435BRA1N7B+13N+15B4BF6N+12B11N3.031.031.06.50766-40.8
11Kneidl, Aline0BRAF3N+14B5B+12N8N15B13N+10B3.026.526.58.0012910.0
12Mattoso,Rafaela Vilela0BRA7N6BF=8N11B+15N+14B10N=13B3.024.024.06.2511650.0
13FIDE 3999068002B14N10BF+15N6N9B+11B=12N2.527.527.55.507420.0
14FIDE 366349305N+13B11N6BF9B12N+15N3B2.028.028.03.506960.0
15FIDE 53805342008BF9N10N13B12B+11N14B4N1.025.525.53.006840.0

Key insights

Biggest movers and upsets — the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets