Gainsborough took a massive stride to Conference North survival with a win over play-off hopefuls Tamworth, thanks to an early Adam Quinn goal.
Quinn side footed home in the eighth minute from a Stephen Brogan corner to move the Blues eight points clear of the drop zone and up to 14th.
It was an excellent team performance, as Trinity produced a masterful defensive display to reduce the hosts to very little in the way of chances despite their possession.
The win capped a remarkable week as they earned seven points from a possible nine against two promotion candidates and the leagues form side in Bradford Park Avenue.
Manager Steve Housham made four changes to his side as Cliff Byrne came into the back four, Danny Forrest and Jamie Yates started on the wings, whilst Brogan came into the centre of midfield.
Jake Picton began as a defensive midfielder to sit in front of the defence as the Blues set up to counter attack.
The plan almost paid off early on as a raking Yates pass was chased by CJ Hamilton and his shot forced a corner.
It was from this corner that Quinn notched his third of the season.
A drilled Brogan corner was flicked on at the near post by Picton into the path of Quinn who side footed home like a centre forward.
The goal flattened the Tamworth faithful before they could get into the game.
It began a period of attack versus defence that would last the entirity, but despite the possession the home side were having, they created just three chances in the game, the first a looping overhead kick.
The Blues should have gone further in front before the end of the half as Hamilton rounded the keeper, teed up Brogan to finish but the side footed effort was superbly saved.
The defensive work rate of the entire team was non stop, as Tamworth tried to lump the ball into the box.
This was easy prey for Byrne, Quinn and the rest as they cleared their lines.
The Lambs did have the ball in the net with minutes to go as former Blue Leon Mettam, inspired by Diego Maradona, handled the ball into the net, but got caught.
There was one last moment for Tamworth as a corner was headed inches wide by goalkeeper James Belshaw.
Trinity stayed firm and made the visit of Gloucester on Monday less of a do-or-die affair.
Steve Housham believes his side have all but confirmed their safety: “We are not safe until we are mathematically but we have broke away from the other teams”
“That’s seven points out of nine where a lot of people would have thought we would be lucky to get one.”
“We have shown that we can match anyone.”
“Today I had to change the team after the heavy pitch on Wednesday, to freshen it up.”
“First half I thought we were a lot more adventurous and we could have wrapped it up before half time.”
“Second half we defended for our lives. I said to the players at half time, away from home your not going to get much of the play, so you have to dig deep and roll your sleeves up.”
“We had a lot of men out there who stood up.”
Trinity: R Watson, Roma (c), Lacey, Binns, Quinn, Picton, Brogan (Davis 69), Byrne, Forrest (Davie 78), Hamilton, Yates. Not used: Stamp, Wisdom-Lockwood, Emery.
Goalscorer: Quinn 8.
Yellow Cards: Quinn, Byrne, Davis, Binns.
Tamworth: Belshaw (c), Purdie, D Smith, James, C Smith, Adams, Styche (Mettam 69), Clarke (Wilkins 69), Jackson, Hibbert, Thornton (Taylor 69). Not used: Sampson, Trainer.
Yellow Cards: Clarke, James, Mettam.
Ref: Mr R Massey-Ellis. Assistants: Mr R Dadley, Mr P Hardisty.