White to play & mate in 6: There's a picturesque solution that's well-concealed; only when you think you've spotted it make your first move.

1.Rh8 f4 - Now that the e3 bishop is en prise, how should White continue?

2.Rh2 fxe3 - How should White proceed from here? (Note that 2...f3, instead of fxe3, runs into the trivial 3.Rh3 f2 4.Bf4#)

3. Re2 exd2 - Now what should White play?

4. Re8 Kxc3 - keep going. White to play!

5. Rb8 Kd3 - Final move of the exercise. How does White finish off?