"We were stoked, we were just expecting a certificate but Alexia bounced all the way home biting her medal," Mrs Nelson said.
Richard Totton, the club's head coach, said he was rapt for the pupils.
"The achievement for me is having the number of children who want to play chess at that level, that's the icing on the cake," he said.
Christopher said he was quietly confident when he played in the final.
"I wasn't nervous because I'd played him before [his opponent] and I had beaten him."
He said he liked chess because it was fun and a good challenge.
The event was held at Kaharoa School on Friday with schools from all around the region and many different age groups competing.