Auckland remain a chance of upsetting table-topping Central Districts in the Plunket Shield but it will take a favourable final day's play at Eden Park's outer oval.
Central Districts batted throughout the third day to overhaul Auckland's advantage and take a lead of their own, leaving all three results possible today.
The Stags, 40 points ahead of the Aces but having played a game more, will begin the final morning with a lead of 271 and four wickets in hand. Auckland will need to quickly wrap up the CD tail before settling in for a challenging chase.
After Jamie How's determined century brought his side back into the match, Kruger van Wyk (31no) and Doug Bracewell (36no) will resume in the middle of the Eden Park No 2 pitch.
The Stags began the day on 107-0, with How and Jeet Raval batting on to establish a record opening partnership. By the time Bruce Martin broke through, the score was on 173 and the Stags were well placed for a big total. How was eventually dismissed for 124, the opener's 15th first class century, which brought Ross Taylor to the crease for another brief stay.