Substitute John Mousinho struck late to seal a vital victory for Stevenage against play-off rivals Carlisle.
Craig Reid could have put Boro ahead when he fired over from 10 yards while Carlisle keeper Adam Collin did well to save a Jamaal Lascelles' header.
Home keeper Chris Day then kept out a headed effort by Andy Welsh with his legs after the break.
Mousinho latched onto Stacy Long's pass before firing in off the underside of the bar to secure Stevenage's win.
VIEWS FROM THE DRESSING ROOM
Stevenage manager Gary Smith told BBC Three Counties Radio:
"It was very exciting and this is what everyone is involved in football for.
"Carlisle were a good side and I thought the fans got behind us well.
"The occasion when two good teams come together is exactly what people are after. The games just keep getting bigger now.
"It's been a long, hard season but in the opening 25 minutes it was as enthusiastic and passionate as we've seen in a long time. It showed everyone we're going for this and feel we really have a chance."
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