The puzzle below is a current daily puzzle. This puzzle is competitive and you have to register to solve it and participate in the daily competition. To register click Login link in the top right corner.

You can use the scores page to see the results of other competitors for this puzzle.

All the puzzles from the previous days are available at our archive page. Puzzles which are older than 5 days do not affect score table and can be attempted without registration.


Author: Vladimir Portugalov

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Insert a digit from 1 to N into every cell, so that each digit appears once in each row and column . Each digit in a cell represents the height of a building. Numbers outside the grid indicate how many buildings a distant observer could see (at least part of) in that row or column. A building will hide any shorter buildings behind it.

Example puzzle

Grid control: Click at a cell reveals the value chooser. Click at the selected value changes the state of the cell. More details about grid control are at the help page.