|County Championship Division Two, Headingley|
|Close, day three: Yorkshire 420, Derbyshire 233-8|
|Yorkshire 7pts, Derbyshire 2pts|
Division Two leaders Derbyshire finished a rain-hit third day in danger of following on as promotion rivals Yorkshire took control at Headingley.
Replying to their hosts' 420, Derbyshire, who began the day on 28-1, closed on 233-8 - still needing another 38 runs to make their hosts bat again.
Wes Durston top scored with 84, but Yorkshire old boy David Wainwright, 45 not out overnight, could hold the key.
Ryan Sidebottom (3-28) was the star man as the Tykes set up a winning position.
Derbyshire were rocked three times early on as Sidebottom struck three times in 24 balls, all edges to on-loan Sussex wicketkeeper Andy Hodd.
That showed just how much the former England left-armer has been missed, having sustained a calf injury which had kept him out of the Tykes' previous four Championship matches.
Durston, aided by Ross Whiteley (35), then led Derbyshire's fightback before rain caused 25 overs to be lost.
But, after the resumption, two late wickets boosted Yorkshire's fading chances of forcing the follow-on.
Tom Poynton (25) shared a 50 partnership with Wainwright before being leg before to Azeem Rafiq.
Then another wicket quickly followed when Antonio Palladino was lbw to his first ball from leg spinner Adil Rashid, who had just seen Wainwright dropped at slip by Adam Lyth.
But, if third-placed Yorkshire do force the follow-on on the final morning, then they will feel confident of wrapping up victory - and closing the gap on the leaders.