Chelsea returned to second in the Premiership after hammering Portsmouth 5-0 at Fratton Park, but top four hopefuls Aston Villa and Manchester City both failed to win. An horrendous error by Portsmouth keeper David James gifted Didier Drogba a simple opening goal.
Pompey suffered further injustice as Florent Malouda was only booked after a clash with Ricardo Rocha which saw the defender stretchered off with a suspected fractured cheekbone.
Malouda then scored two quick goals after the break to seal the points.
The Toffees took the lead just after the half hour with a well worked free kick being headed home by Tim Cahill.
And Everton clinched the points with five minutes remaining when Arteta finished off a quick break.
The Black Cats took the lead in the 22nd through Frazier Campbell but Villa responded almost immediately as John Carew restored parity.
Blackburn took all three points at Ewood Park in a 2-1 win over visitors Birmingham and virtually assured their Premiership survival.
But Blackburn maintained their impressive home record when Dunn was allowed to head home from practically on the line, with Hart punching thin air at his near post.