Hockey is a game in constant flux: on a team with 18 skaters, only 5 are on the ice at a time (in normal situations) and typically for less than a minute each. This requires strategic coordination of player substitutions, both for generating scoring opportunities as well as for shutting down the opponents’ top scoring threats. ShiftChart is a visualization tool detailing which players are on the ice at any time of an NHL game. Layered with important events like goals and penalties, the display provides a contextually-rich game summary and facilitates insight into coaching decisions on player usage, line combinations, and match-ups.