We’ve pretty much seen it all when the Flyers and Penguins get together for a little pond hockey. Three-goal deficits overcome. Melees involving both benches. Fifty-five goals in the previous seven regular-season encounters, alone. What we haven’t seen is great goaltending and low scoring. That was on the agenda Sunday at CONSOL Energy Center as the Penguins stretched their winning streak to an NHL-best 12 games with a 2-1 overtime victory. Tyler Kennedy won it at 2:33. Peter Laviolette’s club, starved for points in a fleeting effort to snare a playoff berth, picked up one, but deserved two in honor of Ilya Bryzgalov. He was fantastic with 33 saves as the Flyers remained five points behind the eighth seed in the Eastern Conference standings, though they are now 13th. “Bryz made some key saves for us,” Flyer captain Claude Giroux said. “We could have won that game, 1-0.” Nope. Boston tried that last week and lost. You’re not going to shut the Penguins out. “Why? It was right there within our reach with six minutes to play,” Max Talbot argued. “Yes, it is possible.” When the Penguins came with a strong push in the third, the Flyers went into a defensive shell. They failed to generate offensive chances and it cost them dearly.