I must be missing something because this looks astoundingly easy. Clearly, the black king can't move. All it takes then is a check on the H file or the 1st rank for mate. So my first move is:

1. N6b4, with the treat of Rh6++

Black has only one response to prevent mate, and that's Rh8. White then follows up with either Rf5 or Rf7 and black can't stop the back rank mate and has no way to check the white king.

Originally posted by EnigmaticCam
I must be missing something because this looks astoundingly easy. Clearly, the black king can't move. All it takes then is a check on the H file or the 1st rank for mate. So my first move is:

[b]1. N6b4, with the treat of Rh6++

Black has only one response to prevent mate, and that's Rh8. White then follows up with either Rf5 or Rf7 and black can't stop the back rank mate and has no way to check the white king.[/b]

Originally posted by Sicilian Smaug
N6b4, Rd6! To take the rook gives a stale mate.

Be5
if Rd1 Ba2, cant stop both mates/check king
if Rd2 Ba2
if Rd3 Ne3
if Rd4 Nc6-b5
if Ra8 Na5
Can't be bothered to type out any more, I think its all covered

I let Fritz8 take a go at it, and the best it comes up with is #4. If Fritz can't do it, then I know I can't. I give up.

Originally posted by Sicilian Smaug
Hmm, I see a few problems with that actiually.

Originally posted by mrstabby
Be5
if Rd1 Ba2, cant stop both mates/check king
if Rd2 Ba2
if Rd3 Ne3
if Rd4 Nc6-b5
if Ra8 Na5
Can't be bothered to type out any more, I think its all covered

Ne3, covers g2
If R threatens N, then Be5

Originally posted by mrstabby
Ne3, covers g2
If R threatens N, then Be5

Originally posted by mrstabby
Ne3, covers g2
If R threatens N, then Be5

Originally posted by leisurelysloth
1...Rd2

ok... Ne1 followed by Qh3+