All raw data for stats presented on Extra Skater come from NHL.com's play-by-play and shift reports for each game. Here's an example play-by-play report and shift report. They're available from the sidebar of each game's boxscore page (like this one).
Stats and graphs that appear on Extra Skater come from a variety of sources. Where known, the creater and/or developer of specific items are listed here.
|Corsi||Developed by Buffalo Sabres goaltending coach Jim Corsi as a measure of goalie workload and applied by Vic Ferrari to skaters|
|Fenwick||Created by blogger Matt Fenwick as a modification of corsi|
|PDO||Created by Brian King on Vic Ferrari's blog under the pseudonym PDO|
|Zone starts||Popularized by Vic Ferrari and outlined in its early stages here|
|TOI-based QoC||Created by Gabriel Desjardins at behindthenet.ca; version used on Extra Skater developed by Eric T and outlined here|
|Game fenwick charts||Created by Ben Wendorf (original chart) and then hosted by Gabriel Desjardins at behindthenet.ca (example)|
|Game head-to-head TOI charts||Developed by Vic Ferrari at his site timeonice.com (example charts)|
|Player usage charts||Developed by Rob Vollman, who has an interactive version at his site hockeyabstract.com|
|Score-adjusted fenwick||Developed by Gabriel Desjardins at Arctic Ice Hockey and refined by Eric T at Broad Street Hockey|
Normal game pages have URLs of the format
game/2013-01-19-penguins-flyers. To make URLs more programmatically accessible, game pages are also available in the format
game/season/gamenumber, where season is the first year of the season with 'p' appended for playoffs and gamenumber is the 5-digit game number from NHL.com. For example
game/2012/20001 redirects to
game/2012p/30416 redirects to