Hard printable puzzles

For someone who does these on purpose. Words run in six directions including backwards, and three filler letters in four are drawn from the words themselves; sudoku need an X-wing or a Y-wing; mazes have few dead ends, but the ones they have run deep.

What the generators do at this level

Word search

6 of the eight directions

Filler letters

filler up to 75% from the words themselves

Sudoku

25-29 given numbers

Maze

20 x 20 cells

Solution length

solution 90% of the longest route