White Rose take command
Watch highlights of day two between Nottinghamshire and Yorkshire
LV= County Championship leaders Yorkshire enhanced their title charge on a dramatic second day at Trent Bridge that saw 16 wickets fall and Nottinghamshire follow on.
Steven Patterson excelled with bat and ball, following a season’s best 40 in the morning session with figures of 5-43 as Nottinghamshire were routed for 150 to concede a lead of 257.
The hosts subsequently closed on second time around, still requiring 139 runs to make Yorkshire bat for a second time.
Patterson was well-supported by Ryan Sidebottom, who took 4-35, as Notts capitulated against the swinging ball.
Their first innings was quickly thrown into disarray as Sidebottom nipped out two key wickets in the half-hour before lunch.
Alex Hales' red-ball woes continued as he nicked his sixth delivery through to Jonny Bairstow and Michael Lumb faced two balls fewer before pushing forward tentatively to be lbw.
Patterson entered the attack immediately after lunch, replacing Jack Brooks, and had instant success as Steven Mullaney fell to another catch at the wicket.
Sidebottom then removed Samit Patel, aided by a Phil Jaques catch at short midwicket, and had Riki Wessels caught behind.
David Hussey and Chris Read were both leg-before to Patterson, who collected his fourth scalp when Luke Fletcher drove to Adil Rashid.
Having lost six wickets for only 40 runs, Notts were indebted to a heavy shower of rain which delayed Yorkshire's charge.
The resumption saw Andre Adams smash a belligerent 39 from just 17 deliveries with the aid of three powerful sixes.
He departed when hitting Patterson to long-leg and Rashid finished the innings off with the wicket of Harry Gurney, leaving Ajmal Shahzad unbeaten on 41.
Both Hales and Lumb avoided being dismissed for a pair but still fell cheaply during the early stages of Nottinghamshire's second innings, while Mullaney became Sidebottom's fifth victim of the day.
Patel led a fightback of sorts with 37, only to be caught one-handed by substitute Richard Pyrah after aiming a hook at Liam Plunkett.
Earlier, Yorkshire secured a fourth batting point when adding 80 runs to their overnight score of 327 for eight.
Adams was responsible for the final two Nottinghamshire breakthroughs, the seamer having Patterson caught behind to end a ninth-wicket stand of 91 and bowling Bairstow for 62 as the wicketkeeper heaved across the line.