Here’s a pair of practice puzzles for the upcoming Bulgarian GP.
Rules Solve as a regular skyscrapers puzzle. In addition, all even clues are given. (That is, any missing clues would be odd numbers if given.)
Some more of my puzzles are up now over at mathe-kaenguru.de. This time, it’s a set of 6 Star Battle puzzles (as well as a tiny puzzle by Bram which probably slipped in along with the applet). The puzzles are listed under April 1st; there’s also a print version.