Is this a leagel win?

I lost this [game; id:1657008; move:49; Game] just one move before a win, I thought that that the loop has to have an empty cell inside to be legal, Is this win acceptable?

sorry for the spelling mistakes, I was trying to type on my 3.7 inchs mobile, can you imagin the keyboard size?

That is a win.  The pieces inside the ring don't matter.