fair and square
US /fer ənd skwer/
UK /fer ənd skwer/

1.
limpia y justamente, sin trampas
in a just and honest way; without cheating or deception
:
•
He won the competition fair and square.
Ganó la competición limpia y justamente.
•
We beat them fair and square, there's no doubt about it.
Les ganamos limpia y justamente, no hay duda al respecto.