The most important feature of the Chess position is the activity of the pieces.
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[Event "rated untimed match"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "Unknown"]
[Black "Unknown499"]
[Result "1-0"]
[Annotator "David Hayes"]
[BlackElo "0"]
[FEN "8/1R5P/8/6K1/p7/6r1/k7/8 w - - 0 1"]
[SetUp "1"]
[TimeControl "0"]
[WhiteElo "0"]
1. Kh4 ( { White can try: } 1. Kf6 Rh3 2. Kg7 Rxh7+ 3. Kxh7 a3 4. Kg6 Ka1 5. Kf5 a2 6. Ra7 Kb2 7. Ke4 a1=Q 8. Rxa1 Kxa1 { Draw. } ) ( { White can also try: } 1. Kf4 Rh3 2. Ke4 a3 3. Kd4 Ka1 4. Kc4 a2 5. Kd4 Rd3+ 6. Kc4 Rc3+ 7. Kb4 Rc4+ 8. Kb3 Rc3+ 9. Kxc3 { Draw. } ) 1... Rg1 2. Rb2+ Kxb2 3. h8=Q+ Ka2 4. Qd4 Rb1 5. Qxa4+ { White wins with a large material advantage. } 1-0