Aberdeen eased to victory over Kilmarnock to boost their hopes of qualifying for the Uefa Cup.
Barry Nicholson opened the scoring for Aberdeen
Barry Nicholson put the Dons ahead from the penalty spot after Momo Sylla fouled Chris Clark during a first half dominated by the home side.
Lee Miller fired the second for Aberdeen three minutes into the second half from six yards.
Killie goalkeeper Alan Combe's throw out hit the back of Darren Mackie's head into the net for a bizarre third.
Andrew Considine and Craig Brewster had both been relegated to the Aberdeen bench, with Zander Diamond and Lee Miller coming into the starting line-up.
Kilmarnock made one alteration, with Simon Ford making way for Frazer Wright in defence.
But there was confusion in the visiting backline as Aberdeen got off to the perfect start after seven minutes.
A stupid and thoroughly needless push by Mohammed Sylla on Chris Clark was punished with a penalty kick.
The Dons midfielder moved into the penalty area, only to be fouled by Sylla and Nicholson slotted the resultant spot-kick low into the bottom right-hand corner of Alan Combe's goal.
Moments later, Kilmarnock manager Jim Jefferies was adamant Russell Anderson should have been punished for a foul on Colin Nish just outside Aberdeen's 18-yard-box.
Colin Nish registered Kilmarnock's first shot on target with a powerful drive that was easily gathered by Jamie Langfield.
But it was Aberdeen who took control as the half progressed and, when Nicholson's cross reached Miller six minutes before the break, the Dons striker was unfortunate to see Combe push his header on to the post.
Darren Mackie scored a bizarre second goal for Dons
And Gary Locke knocked the ball off the Kilmarnock line to prevent Anderson's header from a Nicholson corner putting Aberdeen two ahead.
It took only four minutes for the Dons to double their advantage after the restart.
Richard Foster's cross from the left wing travelled all the way to Jamie Smith at the back post and, when the winger knocked a pass across the six yard box, Miller was on hand to smash the ball high into the Kilmarnock goal.
Nish squandered a chance for Killie, volleying over after Langfield had parried a Willie Gibson cross.
It was over as a contest not long after, though, as absolutely catastrophic mistake from Combe gifted Aberdeen a third goal.
The Killie goalkeeper did well to gather a drive from Nicholson.
But, in attempting a quick throw out, succeeded only in striking the back of Mackie's head with the ball, which bounced directly into the net.
Zander Diamond's header from Nicholson's cross was pushed away by Combe to prevent a fourth goal.
Kilmarnock retaliated with a header from Steven Naismith, which was parried by Langfield, but the Dons finished convincing winners.
Aberdeen: Langfield, Hart, Anderson, Diamond, Foster (Considine 78), Clark, Nicholson, Severin, Jamie Smith (Lovell 64), Miller (Maguire 85), Mackie.
Subs Not Used: Kelly, Touzani, Daniel Smith, Brewster.
Goals: Nicholson 7 pen, Miller 49, Mackie 62.
Kilmarnock: Combe, Sylla (Gibson 46), Greer, Frazer Wright, Grant Murray, Fowler, Locke (Di Giacomo 65), Leven, Naismith, Wales, Nish (Koudou 66).
Subs Not Used: Smith, O'Leary, Hamill, Quinn.
Ref: J Underhill