Fit▶Play

Drag a piece from the tray onto the board. While you drag, the piece floats a little above your fingertip so you can see where it is going, and the cells it would cover turn green whenever the drop is legal. Release to place it; if nothing is green, the piece simply stays in the tray. Tap any piece you have already placed to send it back.

Pieces can be turned but not flipped. Tap the ⟳ button next to a piece in the tray to rotate it a quarter turn clockwise. Each piece arrives in a random orientation, and a placed piece has to go back to the tray before it can be turned again. A piece can only cover empty cells inside the outline, never a wall, a hole or another piece.

When all five pieces are down the shape is completely filled: the board flashes, you score a point and a new outline appears half a second later. There is no skip button — an outline stays until you solve it.

A game lasts 120 seconds, and the clock starts when you tap Start on the Ready card. The timer turns red for the last 20 seconds. When time runs out your total is shown, and any score above zero can be saved to the Hall of Fame. New starts over from zero with a fresh outline.

Tips & strategy

Start with the most awkward corners of the outline, not the open middle. A cell tucked into a notch or a one-wide spur can only be filled by a piece whose shape ends in exactly that nub, so identifying those forced cells first tells you where specific pieces must go before you waste time elsewhere.

Think about each piece by its silhouette rather than its colour. Before dragging anything, rotate the long thin pieces in your mind and ask which one can reach into the narrowest channel of the shape; the bulky square-ish pieces almost always belong in the open body of the outline, so save them for last and let the spindly pieces claim the tight edges.

Count cells when you feel stuck. The pieces always sum exactly to the outline, so a region you have walled off has to be filled by the remaining pieces alone. If, say, five empty cells are cut off, only a single five-cell piece of exactly that shape can fill them, because any two pieces together cover at least six cells. Spotting that a leftover pocket is the wrong size, or that no remaining piece has its shape, is the fastest way to realise a placement is doomed and needs taking back.

Against the clock, do not be afraid to pull a piece out the moment it strands an unfillable gap. A quick tap to retrieve it costs far less than forcing the rest and discovering at the very end that nothing fits. Keeping the outline's empty spaces the same shapes as your remaining pieces is far faster than placing greedily from one side.

Watch for mirror images. Because there is no flip, a four- or five-cell L can never become its mirror image and an S can never become a Z, however many times you tap ⟳. More than nine outlines in ten contain at least one piece whose mirror image is a different shape, so when a corner seems to want the reverse of the piece in your hand, that piece belongs somewhere else — try a different piece there instead of spinning this one round again.

Let the generator's numbers guide you. No piece is smaller than three cells, so a sealed-off pocket of one or two empty cells is always a mistake; take back the last piece at once. About one outline in six has a hole in the middle, and the cells around a hole behave like an edge that pieces must wrap around. Don't hunt for one intended answer either: roughly two outlines in three can be filled in more than one way, and any arrangement that covers every cell scores. Outlines do not get harder as your score climbs, so your result is purely a measure of speed.