[Event "?"]
[Site "?"]
[Date "????.??.??"]
[Round "?"]
[White "White to play and win"]
[Black "?"]
[Result "*"]
[Annotator "peter"]
[SetUp "1"]
[FEN "6n1/3p4/3P1k2/7R/7K/8/8/8 w - - 0 1"]
[PlyCount "17"]
[SourceVersionDate "2020.04.01"]
{[#]} 1. Rh8 Kg7 2. Kg5 $1 Kxh8 (2... Nf6 {this is actually the toughest
defence but now White focuses on winning the d7 pawn} 3. Rd8 Nh7+ (3... Ne4+ 4.
Kf4 Nc5 (4... Nxd6 5. Rxd7+) 5. Ke5 Kf7 6. Kd5 $18 {the d7 pawn drops}) (3...
Kf7 4. Rf8+ Kxf8 5. Kxf6 Ke8 6. Kg7 Kd8 7. Kf8 Kc8 8. Ke7 $18) 4. Kf5 Nf6 (4...
Nf8 5. Rxf8 Kxf8 6. Kf6 $18) 5. Ra8 Nd5 6. Re8 Kf7 (6... Nb6 7. Re7+ Kf8 8. Ke5
{as per the main line}) 7. Re5 Nb6 8. Re7+ (8. Rc5 Ke8 9. Kg6 {and Black
cannot avoid back rank mate}) 8... Kf8 9. Ke5 {there are quicker ways to win
than this from here, but this is simplest - White forces the knight to move
and wins the d7 pawn} Nc4+ 10. Kd5 Nb6+ 11. Kc5 Na4+ 12. Kb5 Nc3+ 13. Ka5) 3.
Kg6 $18 {zugzwang and the main point of the puzzle} Nh6 4. Kxh6 Kg8 5. Kg6 Kf8
6. Kf6 Ke8 7. Kg7 Kd8 8. Kf7 Kc8 9. Ke8 *