Ryan Christie levelled seven minutes after the break after a run from deep in his own half.

But despite creating more than 20 chances, Scott Parker's side only had two shots on target.

Bournemouth move above Huddersfield Town on goal difference, although they do have three games in hand over the Terriers, but are now 14 points adrift of leaders Fulham.

Posh remain bottom, seven points from safety.

Peterborough made six changes from the side that lost 3-0 at Huddersfield on Saturday as they aimed to end a run of three games without a goal and eight matches in all competitions without a victory.

Grant McCann's side felt they should have had a fifth-minute penalty when Jonson Clarke-Harris went down under a challenge from Jack Stacey, before Dominic Solanke twice went close for the hosts in the opening 10 minutes.

Nat Phillips had a volley blocked and Philip Billing blasted a good chance over the bar as it appeared that the high-flying Cherries would take control.

But it was Marriott who fired Posh into the lead as the recalled striker finished well after great build-up play by Joe Ward before Billing forced a save from David Cornell.

The Cherries were much better immediately after the break as Christie's goal - his second in his last three games - brought them level when he toe-poked in a shot having picked up a ball from Solanke.

Solanke had a couple of efforts blocked as the Cherries pushed for a second, but their efforts petered out as the half went on, as they failed to win for a second successive match.

AFC Bournemouth head coach Scott Parker told BBC Radio Solent:

"I thought we started the game very well.

"We didn't respect certain moments of the game. Then they get the goal they want.

"The second half was the team I wanted to see. We gave ourselves a bit of a hill to climb.

"Not a great result. I expect us to win and the players expect us to win."

Peterborough United manager Grant McCann told BBC Radio Cambridgeshire:

"It was a pleasing performance, but I'm disappointed with a point if I'm going to be honest.

"One lapse of concentration has cost us a goal, and when you've got people like Solanke and those boys at the top end of the pitch they can hurt you, and Christie's done that.

"But all in all I'm proud for the boys that they showed a bit more determination, a bit more grit today.

"We've come to one of the best teams in the division, who are probably expected to win the division, and we've given them a real good game."