This game follows a well known but largley discarded line of the Ruy Lopez. It's dodgy but I couldn't find a winning combination that would finish it. can anyone else find an alternative?

well..if you are material up,dont try to win soon.play the game calmly,exchange pieces,promote pawns,and be calm.think before moving.ive seen many people who lost games when material ahead and very eager to win soon lose the game or make it a draw(one of which when my teammate was a queen,a rook and a knight ahead and lost all his pieces except for a corner pawn,thus making a stalemate)