When a hockey team removes its goalkeeper for an extra skater, it is exchanging protection of the net for another attacking player. The empty goal is deliberate. It can create a late chance to tie a game, but it also gives the opponent an opportunity to score into an unguarded net. Read the score and remaining time before deciding the goalkeeper has simply disappeared.

Look for the extra attacker cue
The broadcast may label an empty net or extra attacker, but the change can happen before the graphic catches up. Watch the goalkeeper heading toward the bench and another skater entering under the substitution rules. The camera may remain focused far from the vacated end. A wide view or a later clearance makes the empty net obvious. This is different from a goalkeeper leaving after an injury or being replaced by another goalkeeper. The additional skater is the key tactical clue.
Understand the late-game trade-off
A trailing team needs a goal and has limited time to create it. Adding a skater can help keep possession, recover loose pucks or create another passing option. The risk is that a lost puck can become an immediate chance for the opponent. The decision therefore changes the balance of risk rather than eliminating it. A team still has to enter the attacking zone, win contests and produce a legal shot. The extra player does not make a goal inevitable or turn every long opponent clearance into a mistake.
Distinguish the delayed-penalty situation
A goalkeeper can also leave during a delayed penalty against the opponent. That context is different from a simple late-game gamble, because the pending whistle and possession rules shape the risk. Look for the referee's raised arm and the official explanation. Do not assume every empty-net scene means the team is behind. A clipped highlight may omit the signal that explains the change. The complete sequence matters when interpreting why the bench made the substitution.
Follow the next stoppage and reset
After a goal, whistle or change in circumstances, the goalkeeper may return. Watch the restart rather than carrying the empty-net assumption into the next passage. If you are learning the tactic, note the margin, remaining game time and where the puck was when the goalkeeper left. Then record whether the extra attacker produced sustained pressure, a chance, a goal or a lost possession. Those observations explain the actual outcome without pretending to calculate the coach's exact threshold from one example or applying it to every hockey league.
Useful answers
Does an empty net mean the goalkeeper has been sent off?
No. It is often a tactical substitution for an extra skater. The score, referee signals and bench activity explain the specific situation.
Can a team pull its goalkeeper when it is not losing?
Yes. A delayed-penalty situation can lead to an extra attacker for a different reason. Look for the official signal rather than inferring the motive from the empty net alone.