Torneo Clasificatorio de Cuarta Division, Montes de Oca 2025
35 players participated in this 7-round tournament, held from 21 Jun 2025 to 22 Jun 2025 in Montes de Oca, Costa Rica. 1 titled players. Top 10 Elo average was 1517, and top seed was Mauricio Echeverria Rodriguez (🇨🇷 CRC, 1892).
Moises Alonso Romero Cerdas (🇨🇷 CRC, 1445) won with 6.0/7, ahead of Gabriel Rivera Mora (5.5) and Jason Young Zhou (5.5). Romero Cerdas won solo starting round 6.
The biggest upset came in round 3: Jason Young Zhou (1467) beat Mauricio Echeverria Rodriguez (1892), a +425-point gap.
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How it unfolded
Top 6 · 7 roundsMoises Alonso Romero Cerdas led from R6; +0.5-point edge over the runner-up. Title race converged from 2 co-leaders at R4 to 1 by R6.
Moises Alonso Romero Cerdas held the sole lead from R6 through R7 without losing it.
Moises Alonso Romero Cerdas drew with Gabriel Rivera Mora (Black).
Moises Alonso Romero Cerdas 4 wins (R1–R4)Gabriel Rivera Mora 3 wins (R4–R6)Jason Young Zhou 4 wins (R1–R4)
Key matchups · top 4
Head-to-head between the four finishers| Player | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| 1Moises Alonso Romero Cerdas | * | ½ | ½ | — |
| 2Gabriel Rivera Mora | ½ | * | 1 | — |
| 3Jason Young Zhou | ½ | 0 | * | — |
| 4Matias Soto Rivera | — | — | — | * |
Grille américaine
| # | Player | Elo | Fed | R1 | R2 | R3 | R4 | R5 | R6 | R7 | Pts | Bu C1 | Bu | SB | Perf | Δ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Romero Cerdas, Moises Alonso | 1445 | CRC | +27N | +26B | +4N | +19B | =3N | +9B | =2N | 6.0 | 25.0 | 27.0 | 21.50 | 1716 | +68.4 |
| 2 | Rivera Mora, Gabriel | 1431 | CRC | +31N | =8B | =15N | +11B | +6N | +3B | =1B | 5.5 | 28.0 | 29.0 | 22.00 | 1633 | +24.0 |
| 3 | Young Zhou, Jason | 1467 | CRC | +22B | +13N | +?B | +28N | =1B | −2N | +4B | 5.5 | 23.5 | 23.5 | 15.00 | 1642 | +41.6 |
| 4 | Mora Acuna, Johnny Gabriel | 1468 | CRC | +17N | +11B | −1B | +20N | +?B | +6N | −3N | 5.0 | 26.0 | 26.0 | 14.50 | 1355 | -18.8 |
| 5 | Soto Rivera, Matias | 1539 | CRC | −14B | −21N | +18B | +32N | +22B | +8B | +9N | 5.0 | 19.5 | 20.5 | 14.50 | 2282 | +34.4 |
| 6 | Manzanares Pinto, Guillermo | 1507 | CRC | +21B | =28N | +14B | +10N | −2B | −4B | +16N | 4.5 | 24.0 | 25.5 | 14.25 | 1421 | -13.6 |
| 7 | Gutierrez Rodriguez, Ignacio | 1445 | CRC | −9N | +18B | −12N | +17B | =14N | +15B | +11N | 4.5 | 22.0 | 25.0 | 15.25 | 1466 | +2.4 |
| 8 | Dodaro Gamez, Alessandro | 1500 | CRC | +34B | =2N | −28B | +22N | +15B | −5N | +13B | 4.5 | 21.0 | 21.0 | 11.75 | 1654 | +32.4 |
| 9 | Gonzalez Barboza, Josue David | 0 | CRC | +7B | −?N | +13B | +23N | +28B | −1N | −5B | 4.0 | 22.5 | 22.5 | 11.50 | 1500 | 0.0 |
| 10 | Charpentier Badilla, Ian Sebastian | 1624 | CRC | −12N | +17B | +29N | −6B | −16N | +30B | +14N | 4.0 | 20.0 | 21.0 | 9.00 | 1394 | -37.2 |
| 11 | Chaves Rivera, Dominic Gael | 0 | CRC | +35B | −4N | +32B | −2N | +25B | +?N | −7B | 4.0 | 18.0 | 18.0 | 3.00 | 687 | 0.0 |
| 12 | Zhou Fernandez, Isabella | 1429 | CRC | +10B | −23N | +7B | −?N | −13B | +33N | +21B | 4.0 | 17.5 | 17.5 | 12.00 | 1511 | +5.2 |
| 13 | Perez Rojas, Nicolas | 1576 | CRC | +25N | −3B | −9N | +35B | +12N | =16B | −8N | 3.5 | 23.5 | 23.5 | 7.75 | 1377 | -32.0 |
| 14 | Alfaro Letendre, Benjamin | 0 | CRC | +5N | +24B | −6N | −26B | =7B | +21N | −10B | 3.5 | 22.5 | 24.5 | 11.75 | 1353 | 0.0 |
| 15 | Fernandez Mayorga, ElenaWCM | 0 | CRC | F | +33N | =2B | +24B | −8N | −7N | +28B | 3.5 | 19.0 | 19.0 | 7.25 | 1234 | -30.0 |
| 16 | Garcia Gaspar, Alberto | 0 | CRC | F | +?B | +35N | F | +10B | =13N | −6B | 3.5 | 13.5 | 13.5 | 5.75 | 1568 | 0.0 |
| 17 | FIDE 6569609 | 0 | — | −4B | −10N | +34B | −7N | F | +31B | +30N | 3.0 | 15.5 | 15.5 | 2.00 | 713 | 0.0 |
| 18 | Becerra Sandoval, Marcelo | 0 | CRC | −23B | −7N | −5N | +30B | +34N | −24B | +?B | 3.0 | 14.5 | 14.5 | 1.00 | 660 | 0.0 |
| 19 | Azofeifa Retana, Cesar Augusto | 1473 | CRC | +29B | +20N | +23B | −1N | F | F | F | 3.0 | 12.5 | 12.5 | 6.50 | 1595 | +19.6 |
| 20 | Sandoval Loaiciga, Aldric | 0 | CRC | +30N | −19B | +31N | −4B | F | +22N | −?B | 3.0 | 12.0 | 12.0 | 4.00 | 1333 | 0.0 |
| 21 | Cambronero Vargas, Dana Valeria | 0 | CRC | −6N | +5B | −26N | =29B | +31N | −14B | −12N | 2.5 | 20.5 | 21.5 | 6.75 | 1350 | 0.0 |
| 22 | Montero Chavez, Miguel Angel | 1429 | CRC | −3N | +25B | +24N | −8B | −5N | −20B | F | 2.0 | 22.0 | 22.0 | 4.00 | 719 | -45.6 |
| 23 | Pozo Miranda, Camila | 0 | CRC | +18N | +12B | −19N | −9B | F | F | F | 2.0 | 14.0 | 14.0 | 7.00 | 1479 | +8.8 |
| 24 | Herrera Cordoba, Cala | 0 | CRC | +33B | −14N | −22B | −15N | F | +18N | −?B | 2.0 | 14.0 | 14.0 | 4.00 | 638 | 0.0 |
| 25 | FIDE 6575579 | 0 | — | −13B | −22N | F | +31B | −11N | −27B | +33N | 2.0 | 13.5 | 13.5 | 2.00 | 702 | 0.0 |
| 26 | Chavarria Masis, Astrid | 1406 | CRC | F | −1N | +21B | +14N | F | F | F | 2.0 | 12.0 | 12.0 | 6.00 | 645 | 0.0 |
| 27 | FIDE 6570208 | 0 | — | −1B | −32N | +?B | F | F | +25N | F | 2.0 | 10.0 | 10.0 | 2.00 | 645 | 0.0 |
| 28 | Vaughan Jimenez, Natalie | 0 | CRC | F | =6B | +8N | −3B | −9N | −?B | −15N | 1.5 | 25.5 | 25.5 | 6.75 | 1407 | 0.0 |
| 29 | Badilla Flores, Luciano | 1566 | CRC | −19N | +30B | −10B | =21N | F | F | F | 1.5 | 10.5 | 10.5 | 2.25 | 748 | -42.0 |
| 30 | FIDE 6573550 | 0 | — | −20B | −29N | +33B | −18N | F | −10N | −17B | 1.0 | 16.5 | 17.5 | 1.00 | 795 | 0.0 |
| 31 | FIDE 6573240 | 0 | — | −2B | +34N | −20B | −25N | −21B | −17N | F | 1.0 | 16.0 | 16.0 | 0.00 | 743 | 0.0 |
| 32 | FIDE 6563686 | 0 | — | −?N | +27B | −11N | −5B | F | F | F | 1.0 | 13.0 | 13.0 | 2.00 | 734 | 0.0 |
| 33 | FIDE 6572065 | 0 | — | −24N | −15B | −30N | +?N | F | −12B | −25B | 1.0 | 12.5 | 12.5 | 0.00 | 666 | 0.0 |
| 34 | FIDE 6570240 | 0 | — | −8N | −31B | −17N | F | −18B | −?N | F | 0.0 | 11.5 | 11.5 | 0.00 | 734 | 0.0 |
| 35 | FIDE 6575587 | 0 | — | −11N | F | −16B | −13N | F | F | F | 0.0 | 11.0 | 11.0 | 0.00 | 774 | 0.0 |
Key insights
Biggest movers and upsets — the story behind the numbers.
- 1Romero Cerdas, Moises AlonsoCRC+68.46.0 pts · #1
- 2Young Zhou, JasonCRC+41.65.5 pts · #3
- 3Soto Rivera, MatiasCRC+34.45.0 pts · #7
- 1Montero Chavez, Miguel AngelCRC-45.62.0 pts · #31
- 2Badilla Flores, LucianoCRC-42.01.5 pts · #24
- 3Charpentier Badilla, Ian SebastianCRC-37.24.0 pts · #13
- R3+425 Elo gap
- R5+424 Elo gap
- R1+195 Elo gap