The search features basic game stats since 1917 and more specific stats (shots, power play goals, short handed goals, etc.) since 1987, so you can create custom searches to your heart's content. Let us know if you have any issues, comments, or questions.
Player pages now have expanded assists totals going back to the 1967-68 season, located in the NHL Standard stats section of each page. Compiled from Hockey Summary Project boxscore data, the data breaks out short-handed, power play, and even strength assists, so you can learn that Wayne Gretzky had 15 short-handed assists in 1985-86.
We are spinning up a new database server (transitioning from unitas => rice (Jerry)) and will have what I expect to be a minute or so of downtime as we make the switch. I expect to flip the switch at 2:30 pm.