Square rule

with white move - winning

when black moves a draw

the main thing is to get into the square with the king - the square is determined by the fields in this example (a3, a8, f3, f8)

If the king is in the square the a3-f8 diagonal or enters this square during his move, he overtakes the pawn. do not forget about the double pawn move from the starting position. if the pawn is on a2, then the square is built from the a3 square.