White to play.
White has several promising moves but one is much stronger than the rest.
Try for a few minutes to solve it without moving the pieces. See if you can work out all the key variations.
If you can't solve it after a few minutes, you can start moving the pieces around, or if you have solved it in your head check it by moving the pieces before looking at the solution.
White to move
Wihte can win a pawn here with a clever tactic. It is worth studying this puzzle in particular as this tactic arises quite often in some variations of the Sicilian Defence (1.e4 c5) and the English Opening (1.c4)