Jack Haynes and Liam Patterson-White struck centuries to put Nottinghamshire in the ascendancy after a strong second day against neighbours Leicestershire at Trent Bridge.
Haynes made a sparkling career-best 159, notching his third century of the season in the process, while Patterson-White made the third of his career with a fine unbeaten 111.
The pair shared a stand of 257 for the sixth wicket, eclipsing a record in this fixture that had stood for 101 years.
The Green and Golds then built on their endeavours to claim the maximum five batting bonus points before declaring on 451-8 with a gloomy 13 overs to come at the end of the day.
Dillon Pennington immediately got to his work in that time, claiming two wickets before stumps for good measure as Leicestershire lost both openers to close on 23-2.
Despite losing four wickets in the morning session, Notts were still looking to take the positive option as Joe Clarke, still the division’s leading run-scorer by a large margin, contributed 37.
He was dismissed by Josh Davey, the eventual pick of the visitors’ attack with 3/88, on the stroke of lunch, which arrived with the hosts 135-4.
Although Kyle Verreynne was removed, also by Davey not long after the interval, the remainder of the day belonged squarely to Notts, as Haynes and Patterson-White took charge.
Picking up the reins at 143-5, the duo advanced the total to 293 at tea with no further loss, before adding a further 107 to push the score to the safe realms of 400 before being parted.
Haynes was first to three figures, doing so in a swift 118 balls with 11 fours and a six, as he reached three figures by pulling the towering frame of left-armer Josh Hull to the rope.
He also cut on the off-side effectively as he and Patterson-White overtook the 201 added by Arthur Carr and Willis Walker for the sixth wicket at Aylestone Road all the way back in 1925.
However, there was still more to come, as Notts Academy graduate Patterson-White went to his own ton, with his seventh four through midwicket off Tom Scriven, from 163 deliveries.
At the other end, Haynes hit Scriven for two consecutive fours to reach 150, before going on to pass his previous best of 157, which he had made against Somerset at Taunton last year.
Haynes eventually fell for 159, but not before the duo had made four batting points safe for the hosts, a tally that could yet be invaluable in an increasingly congested top end of the division.
Fraser Sheat and Brett Hutton then combined for respective fun cameos, with the latter in particular smashing a 14-ball 26 to ensure a full five were later banked before the declaration.
It denied the relegation-haunted Foxes a third bowling point and put their top order in the line of fire, with Pennington then seizing the initiative.
The right-arm quick, operating as first change at the Stuart Broad End, had Rishi Patel caught at second slip for nine, before Sheridon Gumbs was bowled off the last ball of the day for 10.
