Practice flow
Replay the same mode whenever you want
This page keeps the region, mode, and modifiers fixed so you can compare runs, build repeatable geography practice, and learn how a modern 3D map of the United States behaves over time.
Replaying the same challenge is useful because you can watch careful decision-making replace rushed guesses in the toughest border zones. Abbreviation prompts add a shorthand-decoding layer, so each replay ties official codes back to precise map positions instead of leaving them as isolated memorization.
No-skip rules make this an especially clear benchmark: if your later runs feel calmer and cleaner, your recall is improving rather than being carried by skips.