Here's another idea: skyscraper sudoku puzzles magazine.
Again I'll give a quick description of this puzzle type for those who aren't too familiar with it:
You have numbers placed around the edge of the grid, usually at the start and end of each row and column. These numbers tell you that if you stand in that position and look across the row or column in that direction, how many skyscrapers you would be able to see if 1 corresponds to the lowest skyscraper and 9 to the highest.
The rest of the rules are as per normal sudoku: place 1-9 once in each row, column and 3x3 box.
It can be a bit tricky to get used to but there are some interesting extra bits of logic that introduce themselves with skyscraper sudoku. Clearly the easiest clue in a 9x9 puzzle would be a '9' because then you know that the order is 1,2,3,4,5,6,7,8,9 in that region. Equally when there is a '1' then you can place '9' in the first square as you know that you can only one skyscraper then it must be the highest one first (9) so that it blocks out the view of all the lower skyscrapers (from 1-8).
Anyhow, it might be interesting to have a magazine of skyscraper puzzles, although I suggest it might get just the one download
How to Solve Futoshiki Puzzles In this video we look at the rules of futoshiki and how they work. We examine the greater than and less than signs that are the key addition to standard sudoku rules. Take a look if you're tempted to have a go at this puzzle type...
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