The current puzzle, phase and transition are global. Partial player boards are never broadcast.
Production puzzles are checked for one exact solution and a logical no-guess solve path.
Exactly six solved positions carry into the next puzzle — one in every row and one in every column.
Why PUZRU exists
Most web logic puzzles are isolated solo levels. PUZRU keeps the calm, private act of solving a logic grid but places it inside one shared event: the first verified correct solution becomes the Discoverer, a 45-second contribution window follows, then the world moves through a 20-second transition into the next Chain puzzle.
Fair play without constant friction
Live accounts use Passkeys. Correct boards are verified by the server and receive a canonical server-side submit time before any extra human check. If Cloudflare Turnstile is required, that verification time does not inflate the recorded solve time or let a later verified claim jump ahead while the earlier claim remains eligible. Normal solving is not intended to show a challenge on every round.
Permanent puzzle history
Completed world puzzles become part of the public Puzzle Archive. The archive provides a first-party record of the boards that actually appeared in the live Chain rather than a catalogue of marketing examples.