Queensland will need to bowl Tasmania out for less than 226 to claim the bonus point they need to stay in the hunt for the domestic one-day final after posting 8-282 at Bellerive.
The Bulls would draw even with the Tigers on 22 points with the bonus point win, the finalist then to be determined by net run rate and travelling to Adelaide to play South Australia.
A win to Tasmania would cement the Tigers’ fourth final in the past five years and give them a chance of hosting the Redbacks.
Queensland overcame a poor start that had left them 2-16, and then a middle order collapse, with young gun Chris Lynn making 98 off 100 balls and an injured Nathan Reardon 67 off 68.
Lynn looked certain to post his first one-day ton but was run out when not on strike after cracking six fours and four sixes, two of the latter from the 35th over bowled by Ben Laughlin.
Reardon suffered a leg injury during his brave knock and at one stage looked restricted to hitting boundaries, managing seven fours and a six.
In-form Jackson Bird was the best of the Tigers’ bowlers with an impressive 2-20 from seven overs.
The Bulls innings had begun poorly with Ryan Broad (one) playing on a Bird delivery in the second over.
Queensland were 2-16 when Andrew Robinson was given out lbw after a referral to the third umpire.
He’d looked plumb in front to Bird but was given not out on suspicion of an inside edge, but the ball had flown through to wicketkeeper Brady Jones forcing the second look.
Joe Burns (48 off 59) survived a dropped catch from Ed Cowan and two close runouts to rebuild the innings with Lynn before wholing out to Jonathan Wells off James Faulkner at 3-107.
Lynn and Reardon took the score to 4-190 as the Bulls lost 4-32, including the wicket of returning captain James Hopes (eight off nine).
At 7-222 a modest total was beckoning but a late flurry from tailenders Matthew Gale (22 off 19) and Cameron Boyce (11 off 6) took them to a competitive total.