Max Euwe was the 5th World Champion. However, he didn't play that good chess in the Zurich 1953. He lost his title to the legendary Alekhine. As he got older and older, his chess suffered.
One of his terrible games:
More on the 1937 Match by Bryan Smith: Clash of Champions: Alekhine vs. Euwe (1937 Rematch) - Chess.com
Max Euwe was the 5th World Champion. However, he didn't play that good chess in the Zurich 1953. He lost his title to the legendary Alekhine. As he got older and older, his chess suffered.
One of his terrible games:
More on the 1937 Match by Bryan Smith: Clash of Champions: Alekhine vs. Euwe (1937 Rematch) - Chess.com