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I Festival Clasificatorio Tercera Division El Guarco AGUA 2025

Open SwissStandard

15 players participated in this 7-round tournament, held from 08 Nov 2025 to 09 Nov 2025 in Paraiso, Cartago, Costa Rica. Top 10 Elo average was 1634, and top seed was Andres Stawski Oliva (πŸ‡¨πŸ‡· CRC, 1768).

Isaac Antonio Leiva Coto (πŸ‡¨πŸ‡· CRC, 1551) won with 5.5/7, ahead of Ronald Alberto Mendez Calvo (5.0) and Thiago Marcel Morales Vasquez (4.5). Leiva Coto won solo starting round 4.

The biggest upset came in round 4: Ronald Alberto Mendez Calvo (1524) beat Andres Stawski Oliva (1768), a +244-point gap.

Location
πŸ‡¨πŸ‡·Paraiso, Cartago, Costa Rica
Dates
08 Nov 2025 β†’ 09 Nov 2025
Time control
Standard: 30 minutes for game with 30 seconds increment from move 1
System
Swiss Β· 7 rounds
Top seed
πŸ‡¨πŸ‡·Andres Stawski Oliva1768
Avg top 10
1,634
Participants
15
Federations Β· 1 represented
πŸ‡¨πŸ‡·Costa RicaΓ—15
Top 3

How it unfolded

Top 6 Β· 7 rounds

Isaac Antonio Leiva Coto led from R4; +0.5-point edge over the runner-up.

Co-leaders
6
3
2
1
1
1
1
23.55.57R1R2R3R4R5R6R7
Leiva Coto5.5Mendez Calvo5Morales Vasquez4.5Loria Molina4Alvarado Machado4Quesada Gamboa4
R4–R7 Β· LEAD HELD

Isaac Antonio Leiva Coto held the sole lead from R4 through R7 without losing it.

R7 Β· HEAD-TO-HEAD Β· WINNER VS 2ND

Isaac Antonio Leiva Coto lost to Ronald Alberto Mendez Calvo (Black).

WIN STREAKS Β· 2 top finishers

Isaac Antonio Leiva Coto 4 wins (R1–R4)Thiago Marcel Morales Vasquez 3 wins (R1–R3)

Key matchups Β· top 4

Head-to-head between the four finishers
Player1234
1Isaac Antonio Leiva Coto*
0
1
β€”
2Ronald Alberto Mendez Calvo
1
*
0
0
3Thiago Marcel Morales Vasquez
0
1
*
1
4Sofia Loria Molinaβ€”
1
0
*

Grille amΓ©ricaine

#PlayerEloFedR1R2R3R4R5R6R7PtsBu C1BuSBPerfΞ”
1Leiva Coto, Isaac Antonio1551CRC+11N+7B+9N+3N=6B+5Bβˆ’2N5.525.026.519.501822+84.4
2Mendez Calvo, Ronald Alberto1524CRC+5Nβˆ’4B+13N+7Bβˆ’3B+9N+1B5.025.527.018.501789+99.6
3Morales Vasquez, Thiago Marcel1690CRC+10N+15B+4Nβˆ’1B+2N=6Bβˆ’5N4.525.026.014.501636-16.8
4Loria Molina, Sofia1608CRC+14B+2Nβˆ’3Bβˆ’6N=5N+7B=9B4.025.026.514.251669+24.0
5Romero Cerdas, Moises Alonso1611CRCβˆ’2B+12N+11B=8N=4Bβˆ’1N+3B4.024.526.011.501608-2.8
6Quesada Gamboa, Kevin1572CRCβˆ’7N+10B+15N+4B=1N=3Nβˆ’8B4.024.525.512.501660+13.8
7Stawski Oliva, Andres1768CRC+6Bβˆ’1N+12Bβˆ’2N+8Bβˆ’4N+11N4.024.025.511.001587-54.8
8Alvarado Machado, Bryan Alberto1740CRCβˆ’15N=9B+10N=5Bβˆ’7N+13B+6N4.019.520.511.751748+2.4
9Rojas Ordonez, Christian Gabriel1609CRC=12B=8Nβˆ’1B+15N+11Bβˆ’2B=4N3.521.522.57.251441-43.2
10Badilla Calvo, Christopher1602CRCβˆ’3Bβˆ’6Nβˆ’8B+12N+13Nβˆ’11B=14B2.517.018.53.751555-8.4
11Roman Rodriguez, Carlos0CRCβˆ’1BFβˆ’5N=13Bβˆ’9N+10Nβˆ’7B1.521.022.53.2514270.0
12Morales Zumbado, Raul1525CRC=9Nβˆ’5Bβˆ’7Nβˆ’10B+15Bβˆ’14Nβˆ’13N1.517.018.02.751220-35.4
13Arias Vargas, Roberto1580CRCFFβˆ’2B=11Nβˆ’10Bβˆ’8N+12B1.514.514.52.251405-36.4
14Hernandez Leandro, Alejandro1558CRCβˆ’4NFFFF+12B=10N1.59.59.52.751579+1.8
15Ramos Chavez, Jose Andres0CRC+8Bβˆ’3Nβˆ’6Bβˆ’9Bβˆ’12NFF1.017.517.54.0013870.0

Key insights

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

Top rating gainers
Top rating losers
Biggest upsets
I Festival Clasificatorio Tercera Division El Guarco AGUA 2025 β€” Paraiso, Cartago, Costa Rica | Chess Tournament Results | ChessStats