Revision and Exam

This is a review of The Fundamentals(unrated to 1600 I think). I thought a review would be a good warmup considering my rather sad results over the last year but I find this book quite challenging.

Sample Question

I gave this problem to a couple of friends(one over 2300 and one 2000) and nobody has correctly solved it. Not to mention all I got was a headache, and I was trying my hardest.

From Part II:

Revision of Boost Your Chess Fundamentals I

Exercise 16-1 Elementary Endgames 

White to Play