fork or double attack

white to play fork of double attack  type in here

Qe5+ forks four pieces

yes correct but queen is forking 6 pieces including the king

fork and double attack are the same thing, right?

or maybe a fork is like attacking two pieces directly while a double attack is creating two separate threats?

no fork and double attack are same 

but what is the answer 

then why do they have two different names?

queen to e5

i think queen f4 also works

it forks the knight and rook

the answer is queen e5

yes but queen e5 is a stronger move for white

Black has 3 bishops? So he promoted a pawn to a bishop?

yes

This is a weird wind mill

qe5 

takes rook

qe5 

takes rook

takes another piece

this is the only move that wins lol