| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 151. Pachman vs M Castillo |
| ½-½ | 49 | 1950 | Venice | E33 Nimzo-Indian, Classical |
| 152. M Castillo vs F Benko |
| ½-½ | 26 | 1954 | Mar del Plata / Buenos Aires Zonal | B92 Sicilian, Najdorf, Opocensky Variation |
| 153. M Castillo vs W O Cruz |
| ½-½ | 36 | 1954 | Mar del Plata / Buenos Aires Zonal | D24 Queen's Gambit Accepted |
| 154. C Humerez Estrada vs M Castillo |
| 0-1 | 28 | 1954 | Mar del Plata / Buenos Aires Zonal | B01 Scandinavian |
| 155. M Castillo vs J Perez Alcocer |
| ½-½ | 41 | 1954 | Mar del Plata / Buenos Aires Zonal | E17 Queen's Indian |
| 156. M Castillo vs R Shocron |
 | ½-½ | 21 | 1954 | Mar del Plata / Buenos Aires Zonal | E21 Nimzo-Indian, Three Knights |
| 157. E Salomon vs M Castillo |
| 0-1 | 29 | 1954 | Mar del Plata / Buenos Aires Zonal | C01 French, Exchange |
| 158. M Castillo vs W Estrada Degrandi |
| ½-½ | 45 | 1954 | Mar del Plata / Buenos Aires Zonal | E71 King's Indian, Makagonov System (5.h3) |
| 159. L Bauza vs M Castillo |
| ½-½ | 22 | 1954 | Mar del Plata / Buenos Aires Zonal | D02 Queen's Pawn Game |
| 160. M Castillo vs C H Maderna |
| ½-½ | 25 | 1954 | Mar del Plata / Buenos Aires Zonal | E15 Queen's Indian |
| 161. E Dodero vs M Castillo |
| ½-½ | 41 | 1954 | Mar del Plata / Buenos Aires Zonal | D40 Queen's Gambit Declined, Semi-Tarrasch |
| 162. M Castillo vs Eliskases |
| 0-1 | 57 | 1954 | Mar del Plata / Buenos Aires Zonal | E52 Nimzo-Indian, 4.e3, Main line with ...b6 |
| 163. H Rossetto vs M Castillo |
| 1-0 | 31 | 1954 | Mar del Plata / Buenos Aires Zonal | A38 English, Symmetrical |
| 164. J Sanguineti vs M Castillo |
| 1-0 | 38 | 1954 | Mar del Plata / Buenos Aires Zonal | C42 Petrov Defense |
| 165. M Castillo vs J de Souza Mendes |
| 0-1 | 39 | 1954 | Mar del Plata / Buenos Aires Zonal | E09 Catalan, Closed |
| 166. R Schroeder vs M Castillo |
| ½-½ | 29 | 1954 | Mar del Plata / Buenos Aires Zonal | E33 Nimzo-Indian, Classical |
| 167. M Castillo vs C Guimard |
| 0-1 | 28 | 1954 | Mar del Plata / Buenos Aires Zonal | D35 Queen's Gambit Declined |
| 168. M Castillo vs Najdorf |
| 0-1 | 49 | 1954 | Mar del Plata / Buenos Aires Zonal | E94 King's Indian, Orthodox |
| 169. M Castillo vs Panno |
| ½-½ | 21 | 1954 | Mar del Plata / Buenos Aires Zonal | E02 Catalan, Open, 5.Qa4 |
| 170. B Wexler vs M Castillo |
| ½-½ | 16 | 1954 | Mar del Plata / Buenos Aires Zonal | A07 King's Indian Attack |
| 171. Pilnik vs M Castillo |
| 1-0 | 38 | 1954 | Mar del Plata / Buenos Aires Zonal | A25 English |
Kibitzing
