URN · Puzzle experiments

Five experiments on the same equilateral board: explore movement, edge matching, and corner-digit rules.

5 · Reflection

Two-sided moving hubs: each flip changes every corner digit to 7 minus itself. Complete the three 1–6 hubs and finish with the blank at any corner.

4 · Moving hubs

The moving puzzle: flip tiles to put 1–6 around each of three hubs, finish with the blank at whichever corner works with your arrangement. Includes animated flips, optional hub feedback, and saved progress.

3 · Corner logic

The fixed-board deduction experiment: fill missing corner digits. Each gold hub sees 1–6 exactly once, and each tile has a total. No movement; focus on the logic. Includes pencil notes and explained hints.

2 · Edge matching

Three digits from 1–5 on each tile. Match the digits across every shared edge. Tile identities are hidden, so there are no visible destinations.

1 · Movement lab

The previous numbered-tile puzzle, with rotating labels and animated edge flips. Restore the original positions, faces, and orientations.