Piece on the chessboard

I wish for different end of HP series. Original story changes as Harry witness death of his potion master Snape. There is no memory to receive, only crude words heard by Hermione and Ron too: "You... are... the Hor...Horcrux,... Potter, ... your scar..." Three friends now return to Hogwarts castle as Voldemort gives rebels one hour to deliver Potter to him or die.