List of NHL playoff series

Columns: Opponent | S | Occurrences | GP | Rec | %
Boston Bruins | 1 | 2017 | 6 | 1-0 | 1.000 | New York Islanders | 1 | 2003 | 5 | 1-0 | 1.000 | Tampa Bay Lightning | 1 | 2006 | 5 | 1-0 | 1.000 | Anaheim Ducks | 1 | 2007 | 5 | 0-1 | .000 | Washington Capitals | 1 | 1998 | 5 | 0-1 | .000 | Totals | 27 | 151 | 11-16 | .407

Example questions:
When did the playoffs start when the Bruins , opponent team of Ottawa Senators participating in NHL playoff series , played ? | When was the opponent team of Ottawa Senators , participating in NHL playoff series , with the second most appearances established ? | When was the opponent team of Ottawa Senators , participating in NHL playoff series , with the 1-3 record established ? | What is the nickname of the opponent team of Ottawa Senators , participating in NHL playoff series , that has the most games played ?

Answers:
April 12 , 2017 | 1970 | 1970 | Pens