Pitile

How to play

• Clue plates line the top and left edges of the board. Each plate shows a stone shape and a number: how many squares of that shape belong in that row or column.
• Pick up the stones waiting at the foot of the wall and carry them onto the board. Tap a stone to turn it 90 degrees.
• Fill every square so that every clue matches, and the wall is complete.
• Placed stones can be moved again, and the undo button takes back your last move.
• Stuck? Use the light bulb to place one stone of the shape you choose in its correct spot.

What makes it tick

Every board has exactly one solution. You can reason your way there from the numbers instead of guessing.

For example, a "bar 2" plate on a row means two squares of bar stones sit in that row: either one bar lying flat, or two upright bars that each cross the row. Think about how each stone can turn, check the column plates too, and narrow down where every stone can go.

A world of stones

Koro the otter travels the world holding Nemu, a sleepy companion stone. Through seven areas (garden, beach, volcano, strata cliffs, mine, cave and night sky), the scenery and the stones you meet keep changing.

Every new stone you meet is recorded in your album: 35 kinds, from mossy garden stones and sea glass to ammonite fossils, jade and star stones. Each one comes with a one-line personality and a small fact. Now and then, a rare stone turns up among the ordinary ones.

Features

• Seven areas, from garden to night sky
• An album of 35 sleepy stones
• A daily puzzle, the same for everyone on that date
• Boards start gentle and grow larger
• Close the app mid-puzzle and your stones are still there
• Sound and reduced-motion settings
• Available in English and Japanese

A good fit if you

• Like quiet puzzles you can think through slowly
• Want one puzzle on a commute or a short wait
• Like stones, minerals, fossils and cute animals

At a glance