Rangers working to fix weakness that hasn’t cost them yet

The Rangers surrendered a third 6-on-5 goal on Monday.Three times this season, the scrambling Rangers have surrendered a goal after their opponent pulled its goalie for an extra attacker.

They actually ended up winning all three of those contests, including a 4-2 victory over the Senators on Monday, but that apparently was enough of a red flag for first-year coach David Quinn to spend a huge chunk of practice ironing out those details before heading to Ottawa for Thursday’s back end of a home-and-home set.

“It’s something we really don’t practice a lot,” Quinn said. “In this league there’s not a lot of time to practice for a lot of things. … It’s an area I thought we were doing a good job and…