Queueit Puzzle

The line only runs one way. That is the whole difficulty. Tap a piece on the board and it joins the back of the line on the right. A new piece fills the hole it left, so the board never runs out — the line is the thing that fills up. Only the leftmost three are ever judged, at the exit. Each attribute has to be all-same or all-different across those three: the colours all match or all differ, the shapes all match or all differ, the numbers all match or all differ. Get it right and they clear, the line closes up, and the new front three might clear in turn. Six slots. Fill them with nothing at the front worth clearing and the run is over. THREE DEPTHS Harbour is a tutorial rather than a level: colour only, thirty pops, four trios in its whole rule space. 33% of threes clear. Ocean is the game played straight — colour, number and shape. 3.7%. Deep adds a facing arrow and a wider board.…