How to determine if rope makes a knot when its pulled at the ends?

Question

' .' character representing empty space
'-' character represents hotizontal segment
'+' character represents corners where rope turns to the right angles
'|' chacter represents vertical segment
'H' represents where horizontal segment passes over vertical segment
capital 'i' represents where vertical segment passes over horizontal segment

here is the file

................
...+------ +...
... | ...... |...
...+...+--H-
... | ...| .. |...
--- i---H--+..
... |... |.......
...+---+.......
................

Answer 1

your description is quite low!

Answer 2

I can't understand the challenge too

Answer 3

may you please elaborate more sir?😂😂😂😂😂