Why did capablanca and Alekhine play so many QGD?

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Heidrich

Why did Capablanca and Alekhine play so many queens gambit declineds? is it that good of an opening compared to others? 

bronsteinitz

Aljechin and Capablanca played a lot.

atarw

No, there are other openings. It was just in style at the time. For example, playing the Sicilian seems to be in style right now.

baddogno

Openings go in and out of fashion.  D4 had supplanted e4 as most popular as the advantages of positional play became more well known.  Probably as a reaction to all the QGD's in their 1927  world championship (28 out of 32 games) the chess world moved on.  Still a mainstay of high level chess, just no longer "the" opening.

atarw

And plus, hypermodern theory in KID, grunfeld, Nizmo Indian, etc. didn't catch on at the time. The only real users of that was Nizmovitch, Reti, and some others

bronsteinitz

Aljechin played a lot e4