Some sacrifices are sound; the rest are mine.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "White player"]
[Black "Black player"]
[Result "*"]
[BlackElo "0"]
[FEN "R7/P6k/8/2K5/8/8/8/r7 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ Rook Behind Opponent Pawn|Black has wisely positioned his rook behind the
passed pawn.|White's rook is tied to the defense of his pawn. } 1. Kb6 { White
tries to free his rook from defensive duties. } 1... Rb1+ { Black will not allow
white's king to defend the pawn. } 2. Kc6 Ra1 3. Kb7 Rb1+ 4. Kc7 Ra1 5. Kb7 Rb1+ 6. Kc7 Ra1 { Draw.|White can make no further progress. } *