Jack Brooks' five-wicket haul moved Somerset to the top of the Specsavers County Championship Division One table with a stunning 102-run victory over defending champions Surrey.
Having removed Mark Stoneman and Rory Burns on the third evening, the seamer took three scalps in seven balls to complete figures of five for 33 and leave the hosts 120 for five in pursuit of 267.
Tim Groenewald then claimed three wickets and Craig Overton two to dismiss Surrey, who are yet to win this season, for 164 at Guildford.
Nottinghamshire held on for a draw with Warwickshire at Edgbaston, despite the best efforts of veteran spinner Jeetan Patel.
Resuming on 116 for one in their follow-on, still another 178 runs away from parity, the visitors were reliant on Ben Duckett's 140 – his first ton for the club – and 85 from Chris Nash in a stand of 199.
Both fell in a collapse of four wickets for 16 runs, but Nottinghamshire managed to bat out the day and reach 354 for eight, a lead of 60, with Patel's four-wicket haul leaving him with 10 for 88 in the game.
A last-wicket stand of 86 between Peter Siddle and Sam Cook ensured Essex drew with Yorkshire at Headingley.
The hosts still harboured hopes of victory at the start of day four, with the visitors resuming on 252 for nine in reply to 390.
But Siddle and Cook, with 60 and 37 not out respectively, kept Yorkshire at bay to take Essex to 309 all out, a deficit of 81.
Yorkshire lost Will Fraine early before half-centuries from Adam Lyth and the prolific Gary Ballance moved their side to 107 for one at tea when rain arrived and the captains shook hands.
Lancashire moved to the top of Division Two despite failing to beat stubborn Leicestershire at Liverpool.
Resuming on five for one in their follow-on, Leicestershire batted 98 overs for 151 for five with Paul Horton top-scoring with 49.
A dramatic Derbyshire collapse allowed Durham to claim a 29-run victory at Emirates Riverside.
Opener Alex Lees carried his bat for 107 lift Durham to a second-innings 242, setting the visitors 268 to win.
They appeared to be coasting to victory, sitting pretty on 234 for six following 71 from Matt Critchley, until Chris Rushworth took three wickets in an over.
Ben Raine then made it four in eight balls, bowling Tony Palladino for figures of four for 44, to skittle Derbyshire for 238.
