No disrespect but really guys, people with ratings in the 1700-1800 range should not be arguing chess as though you were Kasparov, Polgar, Anand, Leko, Kramnik, Adams etc etc.
As I have alluded to earlier I don't play anymore but it seems to me that arguing on the internet over chess puzzles seems moot when you realise a strong PC chess game will solve these puzzles. You don't know if the person is doing it or their $50 software.
If you are any good you should be able to solve these puzzles in your head without a board in front of you. (Well maybe not 16 move mates - but certainly the 3 move mates.)
Relax guys.