In endings with passed pawns a single tempo often settles everything: the same pieces placed slightly differently, or with the other side to move, give the opposite result. That shows up especially vividly in rook against connected passers.
Here White has the king on h2 and connected passers on a6 and b5; Black has the king on h5 and the rook on g1. Black to move, and it is Black who wins (per the tablebases): the rook gets behind the pawns in time and removes them - the one tempo falls to the defence.
The lesson: do not judge positions like this by eye from the pawn count. It is the exact counting of tempi that decides - who attacks the pawns first, or gets the king to safety first.
Drag a piece onto the board, or click a piece and then click the squares. The cross beside the pieces sweeps every piece of that colour off the board, and a single piece can be dragged off the edge.
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It is the mating side to move. Find mate in one.
Openings, endgame positions and breakthrough studies - the set-up appears on the board.
The positions are forcing: one side queens and the other only just gets there. A single move turns a win into a draw.
With checks, in-between attacks and an exact king route - diagonally rather than round about.
Count the line right through to both pawns promoting and compare who queens first, and whether it comes with check.
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