Combinations by Keres, Timman, Andersson

Simple chess tactics of the day, White to move in all positions:

  Timman – Polugaevsky, 1973. Can White Trap Black’s queen?

Andersson – Kostro, Can White take on e4, or Bf5 will trap the queen?

Keres – Alekhine, the game between the two greats ended dramatically. 1. ?

The video shows me solving these and other puzzles: