The daily challenge launched on 15 July 2026. Each day everyone plays the same secret board, and the server replays every posted run before it ranks.
Replaying is the key idea. A posted run is the list of moves you made, and the server plays those moves back with the same game engine. Only runs that genuinely clear the board can be ranked.
There is an honest limit, and it is still true today. A scripted player that really solves the board can still post a fast time that looks plausible. What the replay makes impossible is ranking a run that did not clear the board.
Today the daily always plays classic tap-two, and its page explains how the day, the ranks and the checks work.