What if Black doesn't take White's Bishop?
white to draw
What if Black doesn't take White's Bishop?
It's forced as the other bishop is covering b6 and the king is controlling c4.

What if Black doesn't take White's Bishop?
yeah, what if...what if c. a. t. spelled dog.

My error in stating this is the puzzle by W.E. Rudolph. THAT puzzle has white king on e2 instead of d3, which makes more than a bit of difference, as noted by fzweb & Crafty, as with K on e2, then c4+ does not have the same effect.
The reported difficulty by Rybka is with K on e2.
Indeed I meant to post the Rudolph puzzle- my mistake in not checking thourougly that I dropped the king on the correct square.
Here's a cool puzzle I came across. It's not mine (and it's pretty easy) but I thought it was cool enough that I wanted to share it.
White to draw