Jonny Bairstow converted his maiden first-class century into a superb double hundred as Yorkshire took control of their LV= County Championship clash with leaders Nottinghamshire.
The 21-year-old England Lions batsman, who had previously passed 50 17 times without reaching three figures in 34 first-class matches, hit five sixes and 24 fours in his 292-ball innings before he was bowled for 205.
He was assisted by former Notts seamer Ryan Sidebottom, who hit an unbeaten 45, while Notts all-rounder Paul Franks picked up four wickets.
Bairstow’s dismissal prompted Yorkshire to declare on an intimidating 534-9, but they could only bowl 8.2 overs at Notts openers Mark Wagh and Neil Edwards before bad light ended play an hour early, with the hosts 491 behind on 43-0.
After Yorkshire had batted through the first day in glorious sunshine and with the traditionally seamer-friendly Trent Bridge wicket offering little assistance to the Notts attack, the arrival of cloud cover at the start of the day prompted an early clatter of wickets.
Having begun the day on 291-3, the visitors lost four wickets for 40 runs, with Joe Root nibbling at an away-swinger from Paul Franks to be caught behind by wicketkeeper Chris Read five short of a maiden first-class hundred.
Gerard Brophy was bowled by Luke Fletcher in the next over and Franks found some bounce in the pitch to account for Adil Rashid and Richard Pyrah soon after.
But with the hosts missing leading wicket-taker Andre Adams, unable to bowl due to an elbow problem, Bairstow proved an immovable presence and passed three figures nervelessly, accelerating as batting conditions eased during the day.