A HUNT ON THE RULER ALPS
Six lanterns are hidden on one region of the Ruler Alps, each on a prize column of the ruler sequence. Tap the map where a clue points, or type a lantern's warp address to walk straight to it.
water · sand · grass · forest · rock · snow; gold flames are lit lanterns; the tall gold post is the region's gate; drag the map sideways, tap the strip below to jump
Drag the map to look around; tap where you think a lantern stands.
Every clue is arithmetic: a lantern's rank says how often such a column comes, its square remainder is even (that is the prize law), and its nearest settlement stands on a column of rank seven or more.
The Lantern Hunt · by Lars Rocha · built from sitoolz alone: the map is SITerrain.height, the lanterns are SITerrain.prizes, the settlements CityLaw.sitesIn, the hunt's draw SIIndexrng.Index.