Warwickshire all-rounder Chris Woakes continued his excellent season with the bat to deny Nottinghamshire a final day victory at Trent Bridge.
The England all-rounder kept his first-class average for the season above 70 with a counter-attacking innings of 80 and some late resilience from Keith Barker (44no) saw the Bears end the final day on 290-8.
Nottinghamshire looked certain to claim a victory which would have seen them end the 2012 Division One campaign in third spot when Warwickshire, set a mammoth 421 to win, were reduced to 135-5 shortly after lunch on the final day.
But Woakes and Ian Blackwell (44) joined forces to repel the Notts attack for almost 30 overs in a partnership worth 89 before both fell in quick succession to leave the champions tottering on 235-8.
With 13 overs still left to be bowled and a new ball around the corner, the onus was on Barker and Chris Wright to survive amidst some hostile bowling.
The tail-end duo did not shirk their responsibilities, sharing an unbroken 55-run stand to deny Notts, for whom seamers Paul Franks (4-47) and Luke Fletcher (3-58) starred.
Steven Mullaney breathed new life into Nottinghamshire's hopes of finishing their County Championship season on a high by hitting a fluent 94 as they closed on 444-8 against champions Warwickshire.
The all-rounder hit 11 fours and four consecutive sixes in a fifth wicket partnership of 199 with former England wicket keeper Chris Read, who was out for 36.
Having wiped out their first innings deficit, the hosts resumed on 49 without loss with openers Edwards and Sam Kelsall adding 39 until the latter nudged Jeetan Patel's arm ball to Rikki Clarke at first slip.
Rikki Wessels was next out, falling lbw to Clarke, having plundered five fours and a six from just 32 balls and Edwards (53) followed in the next over, trapped lbw by Patel.
England's James Taylor made just 14, before Mullaney and Read joined forces at the crease, while Paul Franks (76 not out) and Ben Phillips (38) put on 91 for the eighth wicket.
New Zealander Patel was the pick of the Warwickshire bowlers with figures of 4-127 as Nottinghamshire finished the day with a lead of 395 going into the final day at Trent Bridge.
Nottinghamshire and champions Warwickshire sit dead level after the hosts wiped out their first innings deficit on a rain-shortened second day at Trent Bridge.
The Bears were bowled out for 204 on a day shortened by rain, with Andy Carter leading the way for the hosts to finish with four wickets for 55 runs, Warwickshire all-rounders Rikki Clarke and Ian Blackwell both making 37.
Notts openers Neil Edwards and Sam Kelsall then put on 49 inside 13 overs before rain wiped out the rest of the day shortly after lunch with the teams sitting level on runs scored.
The day's action means that the match has effectively becomes a single innings shoot-out, with Notts aiming for their first win since May to boost their chances of a second-placed finish in Division One.
Warwickshire resumed their first innings on 139-6, with Blackwell and Clarke looking to increase their 42-run partnership for the seventh wicket.
But Blackwell only added nine to his overnight score of 28 before he got a thick outside edge to a cut shot off Ben Phillips that was held at head height by Steven Mullaney at second slip.
Clarke then offered no stroke to be bowled by Carter four overs later, with the lanky fast bowler softening up new batsman Chris Wright with a couple of venomous short deliveries.
That paved the way for Paul Franks to have the tail-ender caught behind driving outside off stump, before Franks wrapped up the innings by having Jeetan Patel caught at first slip.
Newly-crowned champions Warwickshire bowled out Nottinghamshire for 155 - but their own batsmen also endured a difficult end to their victorious LV= County Championship campaign.
Seamer Chris Wright claimed 4-28 as the weakened hosts, missing four first-choice batsmen for the final game of the season, were dismissed in just 49.4 overs.
Only Paul Franks offered any resistance of note in making 44 before he became Wright's third victim.
But Notts hit back with Andy Carter taking three wickets in 10 balls to leave Warwickshire on 139-6 at the close, still 16 behind.
Things had looked a lot worse for the champions as they slumped to 90-6, but Rikki Clarke (21 not out) and Ian Blackwell (28no) steadied the ship with an unbroken stand of 49.
Those late runs could prove crucial and Warwickshire will be confident that a lead in excess of 50 could be enough to end their season in style.