| Round 1 on 2020/08/01 at 15:00 |
| Bo. | 1 | Montes de Oca | Rtg | - | 8 | Lepanto | Rtg | 4 : 0 |
|---|
| 1.1 | | | Valverde Vega Santiago_valverdesantiago |
| 1529 | - | | | Aguinaga Perez Maikel_maikel_aguinaga |
| 1400 | + - - |
| 1.2 | | | Solis Fernandez Ivan Josue_ijosuesolisfdez |
| 1400 | - | | | Castro Castro Jairo Jose_jairoc |
| 1400 | + - - |
| 1.3 | | | Bermudez Padilla Ignacio_nachokillchess |
| 1434 | - | | | Duarte Obando Emir Andres_emirduarte06 |
| 1400 | + - - |
| 1.4 | | | Campos Munoz Nahum_nahum08 |
| 1458 | - | | | Diermissen Lopez Ulrich_ulrichdiermissen |
| 1400 | + - - |
| Bo. | 2 | Cartago | Rtg | - | 7 | Goicoechea B | Rtg | 3 : 1 |
|---|
| 2.1 | | | Gonzalez Aguero Ignacio_nacho110630 |
| 1648 | - | | | Flores Delgado Esteban_estebanfd |
| 1400 | 1 - 0 |
| 2.2 | | | Gonzalez Aguero Julian_juligonza2703 |
| 1692 | - | | | Gonzalez Quesada Matias_locochess2019 |
| 1468 | 1 - 0 |
| 2.3 | | | Brizuela Hidalgo Sebastian_sebas112408 |
| 1458 | - | | | Lopez Hangen Miguel Angel_goico45 |
| 1463 | 1 - 0 |
| 2.4 | | | Gonzalez Jahbeth_jahbeth20 |
| 1535 | - | | | Soto Sanchez Alejandro_alesotosan |
| 1423 | 0 - 1 |
| Bo. | 3 | Escazú B | Rtg | - | 6 | Escazú A | Rtg | 0 : 4 |
|---|
| 3.1 | | | Chavez Rodriguez Jose Edwin_joseechavezro |
| 1419 | - | | | Leon Bermudez Marcelo_marchelolb |
| 1651 | - - + |
| 3.2 | | | Fauaz Bringas Tobias_tobiasfb |
| 1632 | - | | | Valverde Herrera Jose Daniel_jodachezzlego |
| 1528 | 0 - 1 |
| 3.3 | | | Garcia Fajardo Samuel_samuelgarcia2001 |
| 1586 | - | | | Fauaz Bringas Matias_matiasfauaz |
| 1551 | 0 - 1 |
| 3.4 | | | Rojas Montoya Esteban_estebanrojasecazu |
| 1537 | - | ACM | | Hernandez Perez Javier Francisco_togejavi |
| 1685 | 0 - 1 |
| Bo. | 4 | Pococí | Rtg | - | 5 | Goicoechea A | Rtg | 0 : 4 |
|---|
| 4.1 | | | Chaves Solis Santiago_thiago0924 |
| 1482 | - | | | Ramirez Aguilar Julian_jjra2009 |
| 1781 | 0 - 1 |
| 4.2 | | | Gevara Emiliano_emilian_123 |
| 1400 | - | | | Ramos Rodriguez Daniel_xzv79 |
| 1687 | 0 - 1 |
| 4.3 | | | Charpentier Badilla Ian Sebastian_ianchq |
| 1548 | - | | | Hidalgo Mendez Emilio_eehhmm |
| 1552 | 0 - 1 |
| 4.4 | | | Miranda Molina Jose Ignacio_igna03 |
| 1400 | - | | | Frajman Kierszenson Lior_liorcr2018 |
| 1684 | - - + |