Queensland paceman Brendan Doggett made two key breakthroughs but dropped one vital catch to give Tasmania the edge in the JLT Sheffield Shield final.
The Tigers, needing an outright victory to secure the title, were 4-221 at the tea break on Day Two at Allan Border Field in Brisbane.
Former Test batsmen Matthew Wade (39 not out) and skipper George Bailey (51 not out) have forged a solid 80-run partnership and are within sight of posting a good first innings score for Tasmania.
Wade, however, was given a massive reprieve on 33 by Doggett, who dropped a regulation catch at point off Mitch Swepson's leg spin just 20 minutes before the end of the second session.
Rookie quick Doggett (2-54) is the only Queensland bowler with multiple scalps but the spill may come back to haunt him.
Bailey's half-ton is his 50th in first-class cricket.
Resuming at 2-99 after lunch, the visitors were only able to add another 21 runs before losing opener Jordan Silk (76) to a terrific catch from Luke Feldman.
Silk took a swipe at Doggett but top-edged it to fine leg, where Feldman managed to dive underneath the ball and take a one-handed catch just centimetres off the turf.
It ended a productive innings from the 25-year-old, who looked in fine touch as he smacked 11 boundaries.
Shortly afterwards, the Bulls struck again.
Doggett lured Jake Doran (34) into a loose pull shot, which he feathered back to Bulls wicketkeeper and captain Jimmy Peirson to leave Tasmania reeling at 4-141.
The Queensland attack was smelling blood at that stage but veterans Wade and Bailey managed to steady the ship.
Day one was abandoned due to a soaked outfield, with session times extended for the remainder of the match to catch up on the lost play.
Queensland made one change to the XI that recorded a come-from-behind win against NSW in Wollongong last week, with Feldman recalled at the expense of Mark Steketee.
The Tigers, in the decider for the first time since their 2013 triumph (with a miserable few years in between), have named an unchanged XI featuring a five-man pace attack.
Our QLD Bulls vs TAS Tigers Away Sheffield Shield Final is being live streamed LIVE + FREE via www.cricket.com.au