Van Barneveld was an easy winner at Alexandra Palace
Former winner Raymond van Barneveld beat Wes Newton 4-1 on Sunday to book his place in the last 16 of the PDC World Championship at Alexandra Palace.
Andy Hamilton fought back from 2-1 down against qualifier Tony Ayres to win 4-2 and will next face Jelle Klaasen.
Klaasen cruised past fellow Dutchman Jan van der Rassel 4-0 to progress to the third round.
Barrie Bates defeated Bill Davis 4-2, Ronnie Baxter beat Denis Ovens 4-1 and Mervyn King downed Mark Walsh 4-2.
Five-time world champion Van Barneveld was at his irrepressible best and had little trouble taking the first set 3-1 as Newton missed two vital doubles.
It was more of the same in the second set, with his opponent three times missing double five to slump to 2-0 behind.
The big Dutchman stuttered in the third, with Newton taking advantage to get on the scoreboard, but there were no further slip-ups as Van Barneveld allowed his rival only one leg in the final two sets.
Van Barneveld, who now meets Baxter in the last 16, puts his resurgence down to a design of darts he last used in 2006.
"As soon as I went back to them I felt great and got a lot of confidence back in practice, and having two averages over 100 on stage is very good," he said.
"I'm very pleased with the way I'm playing and it will be a good game against him."
Fellow Dutchman Klaasen, the 2006 BDO champion, turned in another fine performance to dispatch Van der Rassel, taking the final two sets without conceding a leg.
Having outclassed Colin Lloyd in the first round Klaasen, who hit seven 180s and tied up the decisive fourth set with a cool 12-dart finish, has not lost a set in this year's event.
Qualifier Ayres was 2-1 up against Hamilton and seemingly on the way to a huge upset before the seventh seed roared back to win three consecutive sets, losing only three legs in the process.
King also took three successive sets in his comeback win against Walsh, and now faces qualifier Dennis Smith in the last 16, while Wales' Bates takes on Mark Dudbridge and Phil Taylor faces Kevin Painter.
In Monday's remaining second-round action, Adrian Lewis faces Paul Nicholson, Dennis Priestley meets John MaGowan, Colin Osborne plays Vincent van der Voort and James Wade encounters Tony Eccles.