this isn't checkmate..

Second!  This is Mate in 6, not 4.

Third and it in 6 not 4

it should be mate in 6

Why not?

i found this puzzle to be well thought out

because it should be mate in 6, not 4. 4 isn't checkmate

this is not mate in 4 :D

Stopped after making 5 moves as the Title says "Mate in 4"...guess I should've looked just a little longer as mate is in 6 moves and not 4.  

it is a checkmate, but in 6, not 4.

That's a different statement than saying "this isn't checkmate" They messed up on the title.  Doesn't mean "this isn't checkmate."

Pick your words better.  

Everyone else was smart enough to say "this isn't mate in 4."

checkmate

Mate in 6. Good Puzzle :-)

nice puzzle,

Would have helped if it had said "mate in 6"; looking for mate in 4 makes it a lot harder!

good one