First of all the most important thing is counting how many pawns each side has on their original squares. The option to move 1 or 2 squares as needed is very useful. We see right away (in your first diagram) white has 3 pawns on their original squares while black has 2, so white should win.

So the most important rule is this: **when in doubt, save your pawns on original squares for last.**

Secondly I think it's worth mentioning the idea of mirroring the opponent, so lets quickly look at the same position when there are only 2 pawns.

---

However in more complex positions this doesn't work. Lets see why

Can we come up with any general pattern for when passed pawns happen? Yes. When the players lead with the same pawn, (f and f or h and h) then this happens. For example, lets see what happens when the two players lead with opposite pawns.

So leading with opposite pawns means no passers (black pushed h so you push f).

---

Now we'll quickly look at when you might want to move 2.

---

Ok so putting a few of those ideas together, how do we explain white's various ways of winning?

Hello everyone,

I'm very bad at calculating the reserve tempo. Here it is obvious person who saves the reserve tempo wins. Now I know in these situations you must only move pawns only if you have to, so I usually move my pawns one square at a time to save some reserve moves, but I lose more games like this than I win. Is there any method for me to workout I should move my pawn 2 squares in the first move, or once so I have an extra move remaining. Simply I'm scared to move my pawn 2 squares in the first move in situations like this fearing i will lose that valuable extra pawn move, however I think that is not correct technique. If anyone can teach me a method to win reserve tempo in this puzzle and in doing so answer my question I will be so greatful. Thank you

White pawns are moving upwards, white to move and win reserve tempo.

Edit: Interesting I just realised that similar puzzle, like this with white to move loses. I mean how can you look at both diagrams and know the outcomes, they look very similar to me, except black has not advanced one of his pawns.