| Ratings 
 
 
  | Year | Rank | Edo | Dev. | Games |  
  | 1926 | 275 | 2284 | (64) | 8 |  
  | 1927 | 304 | 2280 | (55) | 12 |  
  | 1928 | 356 | 2265 | (50) | 16 |  
  | 1929 | 298 | 2283 | (54) | 9 |  
  | 1930 | 323 | 2279 | (58) | 0 |  
  | 1931 | 359 | 2275 | (56) | 9 |  
  | 1932 | 323 | 2286 | (55) | 9 |  
  | 1933 | 274 | 2304 | (56) | 0 |  
  | 1934 | 236 | 2322 | (50) | 10 |  
  | 1935 | 293 | 2307 | (41) | 24 |  
  | 1936 | 334 | 2288 | (43) | 15 |  
  | 1937 | 343 | 2282 | (51) | 0 |  
  | 1938 | 374 | 2277 | (52) | 0 |  
  | 1939 | 378 | 2271 | (45) | 15 |  
  | 1940 | 285 | 2295 | (43) | 18 |  
  | 1941 | 250 | 2307 | (47) | 16 |  
  | 1942 | 220 | 2310 | (56) | 0 |  
  | 1943 | 205 | 2314 | (61) | 0 |  
  | 1944 | 190 | 2317 | (61) | 0 |  
  | 1945 | 189 | 2321 | (56) | 13 |  
  | 1946 | 223 | 2302 | (63) | 0 |  
  | 1947 | 220 | 2283 | (65) | 10 |  
 
Rating table notes
 | 
| Biographical data |  | 
   | Name: Castillo Larenas, Mariano |  
   | Born: 24 Dec. 1905 |  
   | Died: 23 Sep. 1970 |  |  |  
   | Notes: |  
   | Gaige (in Chess Tournament Crosstables) has 'C. Castillo' (which may be a misidentification as Carlos Castillo, born 1936). |  |  |  |  
   | References |  | 
| Books |  
   | Di Felice, Chess Results, 1921-1930, page 209 |  
   | Di Felice, Chess Results, 1931-1935, page 378 |  
   | Di Felice, Chess Results, 1936-1940, page 349 |  
   | Di Felice, Chess Results, 1941-1946, page 336 |  
   | Gaige, Chess Personalia, page 65 |  
   | Gaige, Chess Tournament Crosstables IV, page 808 |  
   | Skinner and Verhoeven, Alexander Alekhine's Chess Games, page 332, 645 |  | Web |  
   | Flores Alvarez, Rodrigo.  [Mis aƱos de ajedrez], page 21 |  
   | [AJEFECH - 1926 Championship] |  
   | [Mar del Plata 1928] |  
   | [Mariano Castillo Larenas] |  |  |