Avoid moving pawns, because they cannot go backwards.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "White player"]
[Black "Black player"]
[Result "*"]
[BlackElo "0"]
[FEN "1r6/5k2/1p4p1/pP4P1/P7/1K6/8/3R4 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
{ Active Rooks are Best } 1. Rd6 { White activates his rook attacking two pawns.
Black activates his rook even though it drops the pawn on b6. Still, an
active rook is black's best chance. } 1... Re8 ( { Black can try: } 1... Rb7 { Passive play makes white's game easy. } 2. Kc4 Rb8 ( 2... Rc7+ 3. Rc6 Rb7 4. Rf6+ Kg7 5. Kd5 Rb8 6. Kc6 Kh7 7. Rf7+ Kg8 8. Rb7 Rxb7 9. Kxb7 Kf7 10. Kxb6 Ke6 11. Kxa5 Kf5 12. b6 Kxg5 13. b7 Kh4 14. b8=Q { White wins with a large
material advantage. } ) 3. Kd5 Rb7 4. Kc6 Rb8 5. Kc7 Re8 6. Kxb6 Re5 7. Rf6+ Kg7 8. Kxa5 Rxg5 9. Rc6 Kh6 10. Ka6 Rf5 11. b6 Rf8 12. b7 Kh5 13. Ka7 g5 14. b8=Q Rxb8 15. Kxb8 g4 16. a5 g3 17. a6 g2 18. Rc1 Kh4 19. a7 Kh3 20. a8=Q Kh2 21. Rc2 Kg3 22. Qxg2+ { White wins with a large material advantage. } ) 2. Rf6+ Kg7 { White drives black's king away from the action on the queen side with a
free move because of the check. } 3. Rxb6 Re3+ 4. Kc4 Re4+ 5. Kc5 Rxa4 { Black's active rook keeps material even. } 6. Rb7+ Kf8 { White gains time on
the black king. } 7. Ra7 { White's rook clears the path to promotion of his
passed pawn while keeping an eye on black's passed pawn. } 7... Rg4 8. b6 { Passed
pawns should be pushed. } 8... Rxg5+ { Black momentarily goes up in material, but
all eyes are on white's advanced passed pawn. } 9. Kc6 Re5 10. b7 Re6+ { Black
can only make delaying checks. } 11. Kb5 Re5+ 12. Kb6 Re6+ 13. Kxa5 Re5+ 14. Kb6 { White walks his king back to attack black's rook. } 14... Re6+ 15. Kc5 Re5+ 16. Kd6 Rb5 17. Ra8+ Kg7 18. b8=Q Rxb8 19. Rxb8 { White wins with a large material
advantage. } *