LV County Championship Division One, Edgbaston
Close, day one: Somerset 262, Warwickshire 86-0
Warwicks 3pts, Somerset 2pts
Boyd Rankin took four wickets as Warwickshire bowled Somerset out for 262 on day one at Edgbaston.
Marcus Trescothick hit 69 to become the first man to 1,000 first-class runs this season as Somerset eased to 125-1.
But Rankin (4-41) ripped out the middle order to leave them 155-5, before Peter Trego (56) and Lewis Gregory (48) partially repaired the damage.
Ian Westwood (48 not out) and Varun Chopra (33 not out) helped the Bears to 86-0 in reply by the close.
Somerset raced out of the blocks and Trescothick soon made the 22 he needed to reach 1,000 runs for the fifth consecutive season, on the way to passing 50 for the seventh time this campaign.
But he was unsettled by Rankin, who struck him on the helmet before lunch and dismissed him soon after the interval.
Rankin, rested for the Bears' Twenty20 campaign, burst into life after lunch, enticing James Hildreth to edge to Rikki Clarke at second slip and seeing Craig Kieswetter play on to his stumps before having Trescothick caught down the legside.
Trego and Gregory regrouped with a stand of 75 in 22 overs, before Clarke yorked Gregory for a career-best 48 and found himself on a hat-trick when he had Murali Kartik caught behind off the first ball of his next over, only to then be denied by Gemaal Hussain.
Rankin returned to have Steve Kirby caught behind but was denied a five-wicket haul as Chris Woakes polished the innings off by having Trego caught by Tim Ambrose - the wicketkeeper's fifth catch.
CLOSE OF PLAY SUMMARY
BBC Coventry & Warwickshire's Clive Eakin:
"After a bewilderingly disappointing Twenty20 campaign so far, Warwickshire will take heart from a very good day on their return to the Championship.
"It hadn't looked so promising early on as Somerset hit five an over in the first hour or so, with Marcus Trescothick looking ominous.
"It was a hostile spell from Boyd Rankin that changed the day. Banging it in short, he caused far more problems than any other bowler in the game.
"Warwickshire are in a very promising position after the openers saw them to the close. Ian Westwood hasn't looked this confident for a while - he's clearly benefited from two centuries in last week's second XI match in Nottingham."