which is the best chess trick?

which of the above chess trick or tactic is the best

More interesting: why is this in the endgame forum?

Yes.

More seriously, they are all common patterns and all of them are of paramount importance in their own unique cases. The best chess player knows how to create these opportunities or find them in a position - with ALL chess positions they encounter

the real question has been asked

what arrow

yes

 :tup

This is like a fork

Tricks are for kids.

The best chess trick is to play good moves.

He is right in a way , I almost trapped my opponent at the 1st picture given above as white.

If the word "trick" is used to mean "a tactic"...

Here's a Pawn promotion trick.

Here's another.

nice

cool

From one of my over-the-board tournament games decades ago.