| Buitrago Mosquera Antonio 2075 CRC Rp:1627 |
| Rd. | No.Ini. | | Nombre | Elo | FED | Pts. | Res. | M. |
| 1 | 1 | | Valverde Vargas Allan | 1885 | CRC | 1,5 | w 1 | 1 |
| 2 | 20 | | Aguilar Piña Luis | 2034 | CRC | 1,5 | w 0 | 1 |
| 3 | 90 | | Alfaro Raúl | 2017 | CRC | 1 | s 0 | 1 |
| 5 | 109 | | Rojas Castro Ismael | 1943 | CRC | 5 | w 0 | 1 |
| 6 | 133 | | Quesada Jordy | 1931 | CRC | 5 | w 0 | 1 |
| 8 | 55 | | Castro Badilla Ricardo | 1912 | CRC | 4 | w 0 | 1 |
| 9 | 157 | | Soto Santiago | 1833 | CRC | 3 | s 0 | 1 |
| Flores Rojas Federico 2004 CRC Rp:2077 |
| Rd. | No.Ini. | | Nombre | Elo | FED | Pts. | Res. | M. |
| 2 | 21 | | Barrantes Najera Pablo | 2056 | CRC | 5 | s 0 | 2 |
| 3 | 91 | | Núñez Neeshmy | 1910 | CRC | 2 | w ½ | 2 |
| 4 | 115 | | Gamboa Vargas José Pablo | 1795 | CRC | 3 | s 1 | 1 |
| 5 | 110 | | Sánchez Garro Juan Gabriel | 1885 | CRC | 2 | - 1K | 2 |
| 6 | 135 | | Fernández Salas Shirley | 1814 | CRC | 1,5 | s 1 | 2 |
| 7 | 61 | | Ulloa Avellán Oscar | 2065 | CRC | 3 | s 1 | 1 |
| Blando Chacón Erick 1923 CRC Rp:1891 |
| Rd. | No.Ini. | | Nombre | Elo | FED | Pts. | Res. | M. |
| 1 | 2 | | Valera Marco Antonio | 1600 | CRC | 0 | s 1 | 2 |
| 2 | 22 | | Trigueros Gustavo | 2160 | CRC | 4 | w 0 | 3 |
| 3 | 92 | | Ramírez Joan | 1932 | CRC | 7,5 | s ½ | 3 |
| 4 | 116 | | Zamora Hidalgo Marcos Andrés | 1752 | CRC | 2 | w 1 | 2 |
| 5 | 112 | | Fernández Sánchez Ana Patricia | 1876 | CRC | 1,5 | w 1 | 3 |
| 6 | 137 | | Segura Calderón Ronald | 1876 | CRC | 3,5 | w ½ | 3 |
| 7 | 63 | | Bonilla Rodríguez Andrés | 1863 | CRC | 3 | w ½ | 2 |
| 8 | 56 | | López Duarte Víctor | 1860 | CRC | 3,5 | s 0 | 2 |
| 9 | 158 | | Porras Steve | 1711 | CRC | 1,5 | w ½ | 2 |
| Valdez Torres Nestor Josué 1996 CRC Rp:1821 |
| Rd. | No.Ini. | | Nombre | Elo | FED | Pts. | Res. | M. |
| 2 | 24 | | Murillo Arguedas Jaime | 1942 | CRC | 3 | s 0 | 4 |
| 3 | 94 | | Murillo Felix | 1870 | CRC | 2 | w 1 | 4 |
| 4 | 117 | | Chacón Quesada Andy | 1684 | CRC | 2,5 | s ½ | 3 |
| 5 | 113 | | Peña Varón Víctor | 1851 | CRC | 4,5 | s 0 | 4 |
| 7 | 64 | | Villalobos Venegas Daniel | 1898 | CRC | 3,5 | s ½ | 3 |
| 9 | 159 | | Cháves José | 1683 | CRC | 2 | s 1 | 3 |
| Bonilla Morales Kevin 1757 CRC Rp:0 |
| Rd. | No.Ini. | | Nombre | Elo | FED | Pts. | Res. | M. |
| 1 | 3 | | Barboza Torres Mauricio | 1768 | CRC | 2 | w ½ | 3 |
| 4 | 118 | | Boza Ulate Steve | 1632 | CRC | 3 | w 0 | 4 |
| 8 | 58 | | Esquivel Vargas Herson | 1866 | CRC | 4 | - 0K | 3 |
| Calvo Gutierrez Guillermo 1772 CRC Rp:1670 |
| Rd. | No.Ini. | | Nombre | Elo | FED | Pts. | Res. | M. |
| 1 | 5 | | Thames Montero Jorge | 1785 | CRC | 3 | s 0 | 4 |
| 6 | 138 | | Mata Picado José Rafael | 1742 | CRC | 2 | s 0 | 4 |
| 7 | 65 | | Chavarría Cedeño Brian | 1651 | CRC | 2 | w 1 | 4 |
| 8 | 60 | | Flores Salas Javier | 1927 | CRC | 2 | s 0 | 4 |
| 9 | 162 | | Jiménez Dennis | 1606 | CRC | 1 | w 1 | 4 |
| 1. Ronda el 2012/06/09 a las 13:00 |
| M. | 10 | Comité Deportes San José | Elo | - | 24 | A.D.A. | Elo | 2½:1½ |
| 11.1 | | | Buitrago Mosquera Antonio |
| 2075 | - | | | 1885 | 1 - 0 |
| 11.2 | | | 1923 | - | | | 1600 | 1 - 0 |
| 11.3 | | | 1757 | - | | | 1768 | ½ - ½ |
| 11.4 | | | Calvo Gutierrez Guillermo |
| 1772 | - | | | 1785 | 0 - 1 |
| 2. Ronda el 2012/06/10 a las 09:00 |
| M. | 10 | Comité Deportes San José | Elo | - | 5 | Desamparados | Elo | 0 : 4 |
| 6.1 | | | Buitrago Mosquera Antonio |
| 2075 | - | | | 2034 | 0 - 1 |
| 6.2 | | | 2004 | - | | | 2056 | 0 - 1 |
| 6.3 | | | 1923 | - | | | 2160 | 0 - 1 |
| 6.4 | | | Valdez Torres Nestor Josué |
| 1996 | - | | | 1942 | 0 - 1 |
| 3. Ronda el 2012/06/10 a las 15:00 |
| M. | 13 | Asociación Fischer | Elo | - | 10 | Comité Deportes San José | Elo | 2 : 2 |
| 12.1 | | | 2017 | - | | | Buitrago Mosquera Antonio |
| 2075 | 1 - 0 |
| 12.2 | | | 1910 | - | | | 2004 | ½ - ½ |
| 12.3 | | | 1932 | - | | | 1923 | ½ - ½ |
| 12.4 | | | 1870 | - | | | Valdez Torres Nestor Josué |
| 1996 | 0 - 1 |
| 4. Ronda el 2012/06/17 a las 14:00 |
| M. | 26 | Naranjo "C" | Elo | - | 10 | Comité Deportes San José | Elo | 1½:2½ |
| 11.1 | | | 1795 | - | | | 2004 | 0 - 1 |
| 11.2 | | | Zamora Hidalgo Marcos Andrés |
| 1752 | - | | | 1923 | 0 - 1 |
| 11.3 | | | 1684 | - | | | Valdez Torres Nestor Josué |
| 1996 | ½ - ½ |
| 11.4 | | | 1632 | - | | | 1757 | 1 - 0 |
| 5. Ronda el 2012/06/24 a las 14:00 |
| M. | 10 | Comité Deportes San José | Elo | - | 19 | Naranjo "B" | Elo | 2 : 2 |
| 9.1 | | | Buitrago Mosquera Antonio |
| 2075 | - | | | 1943 | 0 - 1 |
| 9.2 | | | 2004 | - | | | Sánchez Garro Juan Gabriel |
| 1885 | + - - |
| 9.3 | | | 1923 | - | | | Fernández Sánchez Ana Patricia |
| 1876 | 1 - 0 |
| 9.4 | | | Valdez Torres Nestor Josué |
| 1996 | - | | | 1851 | 0 - 1 |
| 6. Ronda el 2012/07/08 a las 14:00 |
| M. | 10 | Comité Deportes San José | Elo | - | 20 | Club de Ajedrez de Paraíso CCDR | Elo | 1½:2½ |
| 10.1 | | | Buitrago Mosquera Antonio |
| 2075 | - | | | 1931 | 0 - 1 |
| 10.2 | | | 2004 | - | | | 1814 | 1 - 0 |
| 10.3 | | | 1923 | - | | | 1876 | ½ - ½ |
| 10.4 | | | Calvo Gutierrez Guillermo |
| 1772 | - | | | 1742 | 0 - 1 |
| 7. Ronda el 2012/07/15 a las 14:00 |
| M. | 16 | UNA | Elo | - | 10 | Comité Deportes San José | Elo | 1 : 3 |
| 10.1 | | | 2065 | - | | | 2004 | 0 - 1 |
| 10.2 | | | 1863 | - | | | 1923 | ½ - ½ |
| 10.3 | | | Villalobos Venegas Daniel |
| 1898 | - | | | Valdez Torres Nestor Josué |
| 1996 | ½ - ½ |
| 10.4 | | | 1651 | - | | | Calvo Gutierrez Guillermo |
| 1772 | 0 - 1 |
| 8. Ronda el 2012/07/22 a las 09:00 |
| M. | 10 | Comité Deportes San José | Elo | - | 18 | TEC A | Elo | 0 : 4 |
| 9.1 | | | Buitrago Mosquera Antonio |
| 2075 | - | | | 1912 | 0 - 1 |
| 9.2 | | | 1923 | - | | | 1860 | 0 - 1 |
| 9.3 | | | 1757 | - | | | 1866 | - - + |
| 9.4 | | | Calvo Gutierrez Guillermo |
| 1772 | - | | | 1927 | 0 - 1 |
| 9. Ronda el 2012/07/22 a las 15:00 |
| M. | 25 | Alajuela IM | Elo | - | 10 | Comité Deportes San José | Elo | 1½:2½ |
| 12.1 | | | 1833 | - | | | Buitrago Mosquera Antonio |
| 2075 | 1 - 0 |
| 12.2 | | | 1711 | - | | | 1923 | ½ - ½ |
| 12.3 | | | 1683 | - | | | Valdez Torres Nestor Josué |
| 1996 | 0 - 1 |
| 12.4 | | | 1606 | - | | | Calvo Gutierrez Guillermo |
| 1772 | 0 - 1 |