HINT: If there exists a solution to the puzzle (marked by

in a table) it is hidden by default. You have a possibility to show it by clicking
Show/hide solution.
HINT: By default all puzzles are ordered by descending date (if you don't choose otherwise) according to when they were added to a database (i.e. topmost are newest puzzles). I'll be glad if you help me to expand this collection with
new puzzles.