Title favourites Daventry Town certainly knew they'd been in a game after being forced to battle hard for this narrow win.
They maintained their nine-point lead at the top of the Future Lions United Counties League Premier Divison table thanks to a deflected first-half goal.
The league's top scorer Luke Emery did well to engineer a shooting opportunity for himself after 30 minutes but there was certainly a stroke of luck about the way his effort squirmed past Travis Portas at the near post.
Daventry hit the woodwork twice but the Poachers fought admirably throughout. For much of the game, neutral observers wouldn't have guessed there was a gap of 14 places between the two sides.
Gary Edgley had to shuffle his pack again, with the experienced Lori Borbely and Ollie Pinner both unavailable and joining Liam Harris, Jordan Tate, Dan Moulds and others on the sidelines.
There was a welcome return for James Sparrow after a long lay-off, with Corey Cunliffe resuming his central defensive duties.
Cunliffe and Kyle Watkins at the back and Danny Horton in central midfield gave the visitors a solid platform, with the persistent running of Fraser Bayliss up front causing plenty of problems for the home defence.
The Poachers' best spell was early in the second half, culminating in a long distance effort from Harrison Holland which was only just too high. Bayliss also forced Daventry keeper Iustin Cerga into a fine save to tip his shot over the bar, while at the other end Portas pulled off a similar effort to deny a goalbound Adam Confue header.
It was only a second defeat in 12 games since Boxing Day and Boston fans should be encouraged by this display against a side seemingly destined for promotion.
There were double celebrations among the Daventry contingent as they had also just discovered they had been reinstated to the KitmanUK UCL Knock Out Cup.
They had lost 6-2 to Deeping in the semi-final - but it later emerged that one of Deeping's substitutes was cup-tied. Tyler Walker was brought on in the 89th minute, having played for Boston Town in an earlier round against Peterborough Northern Star
Daventry will now face Holbeach in the final on 6 May, although Deeping are expected to appeal against the decision.
Town: Portas, J Sparrow, Fosu, Cunliffe, Watkins, Zouka, Horton, Potts, Tunstall (Fenton), Holland (Raducan), Bayliss; unused sub: Karov