Skyline Towers

How to play

Fill every cell with a building height from 1 to the size of the grid. Each height is used once per row and once per column. An edge number is how many buildings you can see from that side: a taller one hides the shorter ones behind it.

Tap a cell, then a height. Notes pencil in guesses. Nothing is marked wrong until you press Check. You get 3 hints; any hint rules out gold and silver. Give up shows the heights and completes the day with no medal.

Frequently asked questions

How do you play Skyline Towers?

Every cell holds a building height from 1 up to the size of the grid. Each height appears once in every row and once in every column. A number on an edge tells you how many buildings you can see looking in from that side: a taller building hides every shorter one behind it. Tap a cell, then tap a height. Notes and undo work the same way as on Mini Sudoku.

How are mistakes counted?

Nothing is marked while you fill heights. When you press Check, cells that disagree with the solution get a stripe, and each new wrong cell counts as one mistake. Gold needs no mistakes and no hint, silver allows up to two mistakes and no hint, and bronze is any solve.

Can I get hints?

Yes, three per puzzle. A hint fills one correct cell and explains in one sentence, using an edge clue or a row or column that has only one height left. Using a hint rules out gold and silver. Give up shows every height and completes the day with no medal.

Is every puzzle solvable without guessing?

Monday to Saturday can be finished by deduction alone. Sunday may need you to try one cell: if that choice breaks a clue, the other choice is forced. Every puzzle has exactly one solution.

Is today's puzzle the same for everyone?

Yes. Skyline Towers is generated from the calendar date (US Eastern), so everyone gets the same puzzle. Open a past day with ?d=YYYY-MM-DD. Monday and Tuesday are 4×4, Wednesday and Thursday 5×5, Friday and Saturday 5×5 with fewer clues, and Sunday 6×6.