| Game |
| Result | Moves |
Year | Event/Locale | Opening |
| 126. K Skold vs M Castillo |
| 1-0 | 47 | 1950 | Dubrovnik Olympiad | B59 Sicilian, Boleslavsky Variation, 7.Nb3 |
| 127. M Castillo vs Najdorf |
| ½-½ | 41 | 1950 | Dubrovnik Olympiad | B08 Pirc, Classical |
| 128. F Mastichiadis vs M Castillo |
| ½-½ | 50 | 1950 | Dubrovnik Olympiad | D51 Queen's Gambit Declined |
| 129. M Castillo vs C Poulsen |
 | 1-0 | 34 | 1950 | Dubrovnik Olympiad | E40 Nimzo-Indian, 4.e3 |
| 130. Tartakower vs M Castillo |
| ½-½ | 27 | 1950 | Dubrovnik Olympiad | A03 Bird's Opening |
| 131. M Castillo vs O'Kelly |
| 0-1 | 42 | 1950 | Dubrovnik Olympiad | E26 Nimzo-Indian, Samisch |
| 132. E Canal vs M Castillo |
| 0-1 | 26 | 1950 | Dubrovnik Olympiad | E22 Nimzo-Indian, Spielmann Variation |
| 133. M Castillo vs E Book |
| ½-½ | 23 | 1950 | Dubrovnik Olympiad | D00 Queen's Pawn Game |
| 134. A Beni vs M Castillo |
| 1-0 | 62 | 1950 | Dubrovnik Olympiad | B09 Pirc, Austrian Attack |
| 135. M Castillo vs Unzicker |
| 0-1 | 24 | 1950 | Dubrovnik Olympiad | C81 Ruy Lopez, Open, Howell Attack |
| 136. M Castillo vs H Steiner |
| 0-1 | 41 | 1950 | Dubrovnik Olympiad | C63 Ruy Lopez, Schliemann Defense |
| 137. M Castillo vs E Paoli |
| 1-0 | 37 | 1950 | Venice | D87 Grunfeld, Exchange |
| 138. Rossolimo vs M Castillo |
| 1-0 | 58 | 1950 | Venice | A06 Reti Opening |
| 139. M Castillo vs V Nestler |
| 1-0 | 45 | 1950 | Venice | E80 King's Indian, Samisch Variation |
| 140. Smyslov vs M Castillo |
| 1-0 | 54 | 1950 | Venice | C81 Ruy Lopez, Open, Howell Attack |
| 141. M Castillo vs M Czerniak |
| 1-0 | 38 | 1950 | Venice | E60 King's Indian Defense |
| 142. M Castillo vs Kotov |
| ½-½ | 30 | 1950 | Venice | E16 Queen's Indian |
| 143. E Szabados vs M Castillo |
| ½-½ | 40 | 1950 | Venice | E67 King's Indian, Fianchetto |
| 144. G Primavera vs M Castillo |
| ½-½ | 55 | 1950 | Venice | A44 Old Benoni Defense |
| 145. M Castillo vs J H Donner |
| ½-½ | 34 | 1950 | Venice | E25 Nimzo-Indian, Samisch |
| 146. H Mueller vs M Castillo |
| ½-½ | 26 | 1950 | Venice | D31 Queen's Gambit Declined |
| 147. Golombek vs M Castillo |
 | 1-0 | 39 | 1950 | Venice | A90 Dutch |
| 148. M Castillo vs R G Wade |
| 0-1 | 28 | 1950 | Venice | D47 Queen's Gambit Declined Semi-Slav |
| 149. M Castillo vs H Steiner |
| ½-½ | 40 | 1950 | Venice | A27 English, Three Knights System |
| 150. M Castillo vs Letelier |
| 1-0 | 31 | 1950 | Venice | A30 English, Symmetrical |
Kibitzing
