The leaderboard
for the still standing.

The official Hardcore Ironman hiscores preserve a player’s position after death. That honours the run—but it means the rank shown beside an active account is not its rank among surviving Hardcores.

TrueHCIM reads the official overall leaderboard up to your position, detects Jagex’s “Player Died” markers, and removes those entries. Your True rank is your position among accounts that are still Hardcore.