The parade to the penalty box began midway through the second period and didn't end until shortly before the intermission.

It was during that span in Sunday night's 2-1 overtime victory over the Red Wings that Blackhawks penalty killers muffled four consecutive Red Wings power plays — including 43 seconds of a two-man advantage for Detroit — in what was just the latest example of how times have changed for the Hawks while short-handed.

Last season the Hawks killed an anemic 78.1 percent of penalties, bad enough for 27th in the NHL. After six games — all victories — to start 2013, the Hawks have yielded one power-play goal in 23 times short-handed. That 95.6 percent success rate was good enough for second in the league heading into Monday night's games.

So what exactly has changed from last season? Some positioning, some mindsets and some personnel.

"The guys have been doing well … (on) faceoffs, clears, entries, pressure (and) blocking shots," coach Joel Quenneville said. "Guys are working well together."