3. b4+ Ka4
4. Qxa6# That's mate in 4, no?
Check your work.
4. Qxa6+ is not mate
afreedman really? (with those 9)
I still don't understand why you post these puzzles.
You took a Mate-in-2 and turned it into a Mate-in-3 solution.
Then you take a Mate-in-3 and turn it into a Mate-in-4 solution.
mmm tough one i thought