I pit chess

Am I the only one who’s thinking of the sketch in Monty Python’s And Now For Something Completely Different where they show some infantry on a parade ground acting and marching like typical soldiers when the RSM bellows the order to

CAMP…IT…UP!!

after which the whole unit starts to mince back and forth in perfect formation.

It is good that you are prepared to sacrifice pieces, but I think you need something more concrete than a ‘window of attack’.
I have sacrificed my Queen, but it was checkmate next move.

I would normally only give up a pawn to keep my opponent’s King in the centre.

I didn’t express that very well. Of course I usually wouldn’t sacrifice an important piece just to be able to futilely attack the other King and say “Check!”, unless my opponent’s only response would allow me to capture a more valuable piece in return. And similarly with lower level pieces.