Below are all possible plays for Black and the corresponding checkmates for white. This is a tough one because there are so many variations for black. If I made a mistake anywhere please let me know. In several cases white has other options which yield the same result.
1.Rc7+ Kxe6 2.Rxe8+ Kf5 3.Bd3+ Kg5 4.Rg7+ and mate next move.
1.Rc7+ Kxe6 2.Rxe8+ Kf5 3.Bd3+ Kg5 4.Rg7+ and mate next move.
2…Be7 stalls the mate beyond five moves, alas.
But what if the king moves to d6?
rc7+ kxe6, bh3+
h
And if
1 Rc7+ Kd6
2 Rxe8+ Kxc7+
what then?
rc7+ kxe6, bh3+
1.Rc7+ Kxe6 2.Bh3+?? not only doesn’t mate in five, it actually loses to 2…Kd6.
…
And if
1 Rc7+ Kd6
2 Rxe8+ Kxc7+
what then?
1.Rc7+ Kd6 2.Rxe8+ Kxc7 isn’t a legal move. The knight on e6 protects the rook.
1. Rc7+ Kf6? 2. Rh6+ Kf5 3. Bd3 mate
1. Rc7+ Kxe6 2. Rh6+ Kf5 3. Rf7+ Kg5 (3. … Ke4? 4. Rh4 mate) 4. Rg6+ Kh5 5. Rh7 mate
1. Rc7+ Nd7 2. Rxd7+ Kxe6 (2. … Kf6? 3. Rh6+ Kf5 4. Bd3 mate) 3. Bh3+ Kf6 4. Rf7+ Kg5 5. f4 mate
1. Rc7+ Kd6 2. Rxe8! Nc3+ 3. Kc2 a1=N+ 4. Kd3 Ra7 5. Nf7 mate
Below are all possible plays for Black and the corresponding checkmates for white. This is a tough one because there are so many variations for black. If I made a mistake anywhere please let me know. In several cases white has other options which yield the same result.
A1. 1. Rc7+, Nd7 2. Rxd7+, Kxe6 3. Bh3+, Kf6 4. Rf7+, Kg5 5. f4#
A2. 1. Rc7+, Nd7 2. Rxd7+, Kf6 3. Rh6+, Kf5 4. Bd3#
B1. 1. Rc7+, Kd6 2. Rxe8, Nc3+ 3. Kc2, a1N+ 4. Kd3, (any move) 5. Nf7#
B2. 1. Rc7+, Kd6 2. Rxe8, (any move besides Nc3+) 3. Nf7#
C1. 1. Rc7+, Kxe6 2. Rh6+, Kf5 3. Rf7+, Kg5 4. Rg6+, Kh4(or Kh5) 5. Rh7#
C2. 1. Rc7+, Kxe6 2. Rh6+, Kf5 3. Rf7+, Ke4 4. Rh4#
D1. 1. Rc7+, Kf6 2. Rf7+, Kxe6 3. Rh6#