Johnny Boychuk and the Bruins defense strikes again.

Boychuk scored the game-tying goal early in the third period last night, setting up the B’s for a 2-1 victory in Game 3 of the Eastern Conference semifinals against the Rangers. It was Boychuk’s fourth goal of the playoffs and the fifth scored by a Bruins blueliner in the series.

“It’s just a bonus,” Boychuk said of all the production coming from the blue line. “We just want to get shots on net and our forwards are doing a good job of screening (the goalie). Sometimes they’ll tip it and it will go in. But we’ve been hitting the net and it’s been going in. We just have to keep doing the same thing.”

Boychuk, who scored on a wrist shot through a Shawn Thornton screen, has 10 goals in 55 playoff games.

“I’m just hitting the net and guys are getting in front of (the shots). Sometimes it’s just luck,” said Boychuk, who scored the game-winner in Game 2. “So far I’ve probably hit four posts. But you just have to keep shooting them and, if you don’t get it blocked, usually good things will happen.”

Been here before

The Bruins are in a place most teams would love to be, up 3-0 in games. But you get the sense that their blown 3-0 lead to the Flyers in 2010 will never be erased from their minds.

After winning the Stanley Cup the next year — and finally putting the hammer down on Philadelphia in a four-game sweep — it’s not quite the albatross that it could have been. Yet after nearly blowing a 3-1 lead to Toronto in the first round, the lack of a killer instinct is still an issue.

“When you’re up 3-0 against a team and then you’re up 3-0 in (Game 7) you can get a little too comfortable,” Boychuk said, referring to the 4-3 loss to the Flyers in 2010. “We’ve been in that situation and you can’t get comfortable. You have to respect your opponent because they’re a good team. It’s not our right to win. We have to go out there and earn it. We should remember that and make sure we come out hard. If we come out hard and play like we did (last night), we have a good chance of winning. I’m not going to say that we are, but we’ll have a chance.”