Lincoln need one more point to seal their play-off place after a thrilling 4-2 win at Coventry.The Imps led 3-2 at the break before Lee Frecklington made the game safe in the 67th minute.It leaves them six points ahead of Mansfield with two games to play.The Imps got off to a flyer when Matt Rhead smashed a half volley home after 53 seconds.Tom Bayliss levelled for the Sky Blues in the 16th minute with a well taken finish.Ollie Palmer fired into the bottom left corner to restore Lincoln's lead in the 38th minute.But the home side levelled seconds later when Jordan Shipley turned home a Bayliss cross.Palmer got his second a minute before the break when he pounced on a rebound after James Wilson's shot was blocked.It was game over when Frecklington rounded off a brilliant counter attack seconds after Max Biamou had had a penalty appeal waved away.Jordan Ponticelli and Biamou both missed chances to cut the gap as Coventry pushed in the closing moments.