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XIV Pan-American School Chess Championship 2025 STD U13 Open

Open SwissStandard

33 players participated in this 9-round tournament, held from 30 Aug 2025 to 05 Sept 2025 in Florianopolis SC, Brazil. 4 titled players from 7 federations. Top 10 Elo average was 1967, and top seed was Lucas Galvan Calcada (πŸ‡§πŸ‡· BRA, 2073).

Aayansh Guntaka (πŸ‡ΊπŸ‡Έ USA, FM, 1889) won with 8.0/9, ahead of Lucas Galvan Calcada (7.5) and Enzo Mathias Vinales Gonzalez (6.5). Guntaka won solo starting round 6.

The biggest upset came in round 9: Gabriel Conte Dos Santos (1542) beat Melian Cabrera (1894), a +352-point gap.

Location
πŸ‡§πŸ‡·Florianopolis SC, Brazil
Dates
30 Aug 2025 β†’ 05 Sept 2025
Time control
Standard: 90 minutes with 30 second increment from move 1
System
Swiss Β· 9 rounds
Top seed
πŸ‡§πŸ‡·Lucas Galvan Calcada2073
Avg top 10
1,967
Participants
33
Titled players Β· 4
FMΓ—2
CMΓ—2
Federations Β· 7 represented
πŸ‡§πŸ‡·BrazilΓ—15
πŸ‡΅πŸ‡ΎParaguayΓ—7
πŸ‡¨πŸ‡¦CanadaΓ—4
πŸ‡΅πŸ‡ͺPeruΓ—2
πŸ‡ΊπŸ‡ΈUnited States of AmericaΓ—2
πŸ‡¦πŸ‡·ArgentinaΓ—1
πŸ‡©πŸ‡΄Dominican RepublicΓ—1
Top 3

How it unfolded

Top 6 Β· 9 rounds

FM Aayansh Guntaka led from R6; +0.5-point edge over the runner-up. Title race converged from 4 co-leaders at R4 to 1 by R6.

Co-leaders
14
5
2
4
2
1
1
1
1
2.54.579R1R2R3R4R5R6R7R8R9
Guntaka8Calcada7.5Vinales Gonzalez6.5Gao6Huang6Lara Santos5.5
R6–R9 Β· LEAD HELD

FM Aayansh Guntaka held the sole lead from R6 through R9 without losing it.

R5 Β· HEAD-TO-HEAD Β· WINNER VS 2ND

FM Aayansh Guntaka beat Lucas Galvan Calcada (Black).

WIN STREAKS Β· 3 top finishers

FM Aayansh Guntaka 3+4 wins (R1–R3, R5–R8)Lucas Galvan Calcada 4 wins (R6–R9)FM Enzo Mathias Vinales Gonzalez 3 wins (R5–R7)

Key matchups Β· top 4

Head-to-head between the four finishers
Player1234
1FMAayansh Guntaka*
1
1
Β½
2Lucas Galvan Calcada
0
*β€”
1
3FMEnzo Mathias Vinales Gonzalez
0
β€”*β€”
4CMHeye Gao
Β½
0
β€”*

Grille amΓ©ricaine

#PlayerEloFedR1R2R3R4R5R6R7R8R9PtsBu C1BuSBPerfΞ”
1Guntaka, AayanshFM1889USA+18N+32B+6N=9B+2N+13B+10N+3B=4N8.044.546.040.502217+136.4
2Calcada, Lucas Galvan2073BRA+7B=10N+28B+4Nβˆ’1B+11N+5B+9N+6B7.546.048.538.002147+36.0
3Vinales Gonzalez, Enzo MathiasFM2042PAR+27N=16B+19Nβˆ’12B+14N+8B+9Nβˆ’1N+7B6.542.545.530.251918-29.4
4Gao, HeyeCM2068CAN+8N+23B=12Nβˆ’2Bβˆ’5B+28N+19B+11N=1B6.044.547.027.001951-40.8
5Huang, Justin1811CAN+30Nβˆ’6B+16N+15B+4N=9Bβˆ’2N=12B+11N6.043.546.028.001993+86.4
6Lara Santos, Angel SebastianCM2059DOM+15B+5Nβˆ’1Bβˆ’10N+20B+23N=7B+21Bβˆ’2N5.545.048.525.251869-69.6
7Waterkemper, Lucas Bauler1623BRAβˆ’2N=19B=17N+25B+15N+21B=6N+10Bβˆ’3N5.542.045.524.501816+80.0
8Motta, Pedro Jose Colombo1603BRAβˆ’4B+20N+29Bβˆ’11N+18Bβˆ’3N+23B=13N+16B5.538.541.021.001809+89.6
9Lee, Daniel Joshua1969CAN+24B+14N+11B=1N+10B=5Nβˆ’3Bβˆ’2Bβˆ’12N5.048.051.525.501904-26.0
10Fernandez Monteza, Fabian Arturo1856PER+26N=2B+22N+6Bβˆ’9N+12Bβˆ’1Bβˆ’7N=13B5.045.548.523.751891+18.4
11Yu, Vincent Zhiwen1868USA+20B+29Nβˆ’9N+8B+12Nβˆ’2B+13Nβˆ’4Bβˆ’5B5.044.046.522.001835-8.0
12Dos Santos, Leonardo Lopes1955BRAF+13N=4B+3Nβˆ’11Bβˆ’10N+16B=5N+9B5.043.043.027.001965+7.6
13Telles, Arnoldo Beber1639BRA+31Nβˆ’12B+32N+22B+21Nβˆ’1Nβˆ’11B=8B=10N5.038.540.016.751768+49.2
14Lelinski, Arthur1682BRA+25Nβˆ’9B=18N+19Bβˆ’3Bβˆ’16N+27B=22N+21B5.035.538.518.501751+26.8
15Mino Almiron, Joaquin A.1599PARβˆ’6N+26B+31Bβˆ’5Nβˆ’7B+29N+20Bβˆ’16N+18B5.035.037.015.501647+11.5
16Altenhofen, Rafael Graneto1700BRA+17B=3Nβˆ’5Bβˆ’28N+26N+14Bβˆ’12N+15Bβˆ’8N4.540.543.020.751692-7.6
17Villanueva Menendez, Joaquin1459PARβˆ’16N=27B=7Bβˆ’20N+31B=24N+29B=18N=19B4.531.033.014.501534+29.6
18Dure Hetter, Alejo Daniel1543PARβˆ’1B+33N=14B=24Nβˆ’8N+26B=22N=17Bβˆ’15N4.038.538.511.501567+0.6
19Su, Jayden Chenxuan1627CAN+33B=7Nβˆ’3Bβˆ’14N+32N=22Bβˆ’4N=24B=17N4.036.536.510.251641-7.2
20Dos Santos, Gabriel Conte1542BRAβˆ’11Nβˆ’8B+30N+17Bβˆ’6N+25Bβˆ’15NF+22B4.035.535.514.501669+44.0
21Ortiz Bareiro, Josias Ezequiel1544PARβˆ’22N+25B+27N+23Bβˆ’13Bβˆ’7N+28Bβˆ’6Nβˆ’14N4.035.037.512.501647+41.6
22Cabrera , Melian1894ARG+21B=28Nβˆ’10Bβˆ’13N+24B=19N=18B=14Bβˆ’20N4.034.537.015.251574-135.2
23Maset, Pedro Yuki Yoshida1840BRAFβˆ’4N+24Bβˆ’21N+28Bβˆ’6Bβˆ’8N+26B=25N3.533.533.510.751631-80.4
24Lopez Maldonado, Matias Nicolas1575PARβˆ’9N+30Bβˆ’23N=18Bβˆ’22N=17BF=19N+26B3.530.530.511.751630+13.6
25Rojas Raraz, John Arick1434PERβˆ’14Bβˆ’21NFβˆ’7N+30Bβˆ’20N+31B+29N=23B3.529.029.08.751494+2.8
26Friedrich, Augusto Johannpeter1531BRAβˆ’10Bβˆ’15N+33B+31Nβˆ’16Bβˆ’18N+30Bβˆ’23Nβˆ’24N3.030.030.04.501353-55.6
27Yamamoto, Pedro Machado1580BRAβˆ’3B=17Nβˆ’21B+33Nβˆ’29BFβˆ’14N+32B=30N3.026.526.55.001434-60.4
28Castilhos, Ryan Da Paixao1541BRAF=22Bβˆ’2N+16Bβˆ’23Nβˆ’4Bβˆ’21N+31BF2.531.531.58.501617+11.6
29Rahn, Johan Felipe1424BRAFβˆ’11Bβˆ’8N=32B+27Nβˆ’15Bβˆ’17Nβˆ’25B+33N2.528.028.03.751352-25.2
30Noguera Villalba, Vidal Samuel1518PARβˆ’5Bβˆ’24Nβˆ’20BFβˆ’25N+32Bβˆ’26N+33N=27B2.524.524.53.001348-58.8
31Carvalho, Arthur Gomes Dummar0BRAβˆ’13BFβˆ’15Nβˆ’26Bβˆ’17N+33Bβˆ’25Nβˆ’28N+32B2.025.025.01.5012300.0
32Vailatti, Eduardo Gabriel1538BRAFβˆ’1Nβˆ’13B=29Nβˆ’19Bβˆ’30N+33Bβˆ’27Nβˆ’31N1.527.027.01.251212-78.8
33FIDE 34801430β€”βˆ’19Nβˆ’18Bβˆ’26Nβˆ’27BFβˆ’31Nβˆ’32Nβˆ’30Bβˆ’29B0.022.522.50.007370.0

Key insights

Biggest movers and upsets β€” the story behind the numbers.

Top rating gainers
Top rating losers
Biggest upsets
XIV Pan-American School Chess Championship 2025 STD U13 Open β€” Florianopolis SC, Brazil | Chess Tournament Results | ChessStats