Background: Jose Raul Capablanca y Graupera (19 November 1888 - 8 March 1942) was a Cuban chess player who was world chess champion from 1921 to 1927. A chess prodigy, he is considered by many as one of the greatest players of all time, widely renowned for his exceptional endgame skill and speed of play. Born in Havana, he beat Cuban champion Juan Corzo in a match two days before his thirteenth birthday on 17 November 1901.
Context: After losing the World Championship in late 1927, Capablanca played more often in tournaments, hoping to strengthen his claim for a rematch. From 1928 through 1931, he won six first prizes, also finishing second twice and one joint second. His competitors included rising stars such as Max Euwe and Isaac Kashdan, as well as players who had been established in the 1920s, but Capablanca and Alekhine never played in the same tournament during this period, and would next meet only at the Nottingham, 1936 tournament, after Alekhine had lost the world title to Euwe the preceding year. In late 1931, Capablanca also won a match (+2-0=8) against Euwe, whom Chessmetrics ranks sixth in the world at the time.  Despite these excellent results, Capablanca's play showed signs of decline: his play slowed from the speed of his youth, with occasional time trouble; although he continued to produce many superb games, he also made some gross blunders. Chessmetrics nonetheless ranks Capablanca as the second strongest player in the world (after Alekhine) from his loss of the title through to autumn 1932, except for a brief appearance in the top place.  Alekhine's offer to play Capablanca in a rematch if $10,000 could be raised came to naught thanks to the Great Depression. After winning an event at New York in 1931, he withdrew from serious chess, perhaps disheartened by his inability to secure a return match against Alekhine, and played only less serious games at the Manhattan Chess Club and simultaneous displays. On 6 December 1933, Capablanca won all 9 of his games in one of the club's weekly rapid chess tournaments, finishing 2 points ahead of Samuel Reshevsky, Reuben Fine and Milton Hanauer.  It is from this period that the only surviving voiced film footage survives. He is with Max Euwe and Dutch radio sports journalist Han Hollander. Hollander asks Capablanca for his views on the upcoming world Championship match between Euwe and Alekhine in October of that year (1935). Capablanca replies: "Dr. Alekhine's game is 20% bluff. Dr. Euwe's game is clear and straightforward. Dr. Euwe's game--not so strong as Alekhine's in some respects--is more evenly balanced." Then Euwe gives his assessment in Dutch, explaining that his feelings alternated from optimism to pessimism, but in the previous ten years, their score had been evenly matched at 7-7.
Question: when did he go into partial retirement?

Answer:
After winning an event at New York in 1931, he withdrew from serious chess, perhaps disheartened by his inability to secure a return match against Alekhine,