Nine times champion of Uruguay (1953, 1959, 1960, 1961, 1966, 1967, 1973, 1977 and 1979). Walter Estrada Degrandi three times participated in World Chess Championship South American Zonal tournaments (1954, 1960, 1978).
Walter Estrada Degrandi played for Uruguay in the Chess Olympiads:
In 1962, at first board in the 15th Chess Olympiad in Varna (+3, =4, -9),
In 1978, at first board in the 23rd Chess Olympiad in Buenos Aires (+1, =1, -4).
Walter Estrada Degrandi played for Uruguay in the Pan American Team Chess Championships:
In 1971, at third board in the 1st Panamerican Team Chess Championship in Tucuman (+1, =1, -3).