A passed pawn is a criminal that must be held under lock and key. Passed pawns are dangerous and if they are not kept under watch they can easily escape and promote.
We must look always to find how to gain the winning advantage by creating a passed pawn. Often you can make trades or sacrifices to create the passed pawn. Always keep an eye out for these opportunities.
There is a powerful move that will create a passed pawn or win one of White's pieces, can you see it?
Pawn to c3 and white cannot take the pawn because it would no longer protect the knight on a3. White avoids losing a piece, but now Black's c-pawn will turn into a passed pawn on the next move. What is Black's best pawn move?
White is hanging on by a thread. Can you find a powerful move that forces the trade of rooks with a winning position?
Black will trade rooks on the next turn and promote the b-pawn with a winning position.