i dont understand queen f4

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Avatar of King343

http://www.chessgames.com/perl/chessgame?gid=1012490

 

in this game of capablanca vs. alekhine

 

although capa won...why on move 36 did he play queen f4

 

why not knight d6 check and win black's queen?

Avatar of SaintGermain32105

neither do I

Avatar of Diakonia
Avatar of Riten
jengaias wrote:

White's queen is under attack from black rook.

So  36.Nd6+ Rxe4 and Black wins.

I think black doesn't win but it is much harder to win for white than after Qf4.