Logic Masters Deutschland e.V.

There are 17 9*9 Sudoku grids, of various rules.

Some 2*2 shapes are drawn and marked with a letter. Shapes with the same letter will have the same color, and they must be clones(the topleft cells contain the same numbers, and similar for the other 3 places.)
Numbers in a such 2*2 may repeat, and 2*2s of different letters might be clones.

The rules of grids are below. Unless stated, Classic sudoku rules are applied.

(Grids 1,2,9,10,17) Classic: No extra rules applied.
(Grids 3,11) Irregular: The boxes have irregular shapes instead of 3*3 squares.
(Grids 4,12) Extra Region: Some groups of 9 cells are shaded. For each group, the nine cells contain a set of 1~9.
(Grids 5,13) Thermo: For every line with a bulb, numbers increase from the bulb to the end.
(Grids 6,14) Clone: Shaded groups of the same shape and shading are clones. Rotated/reflected shapes are considered different.
(Grids 7,15) Outside: The numbers outside the grid appear in the first 3 cells in the corresponding row/column and direction.
(Grids 8,16) Killer: For each cage, the upper-left clue equals the sum of the numbers in it. Numbers cannot repeat inside a cage.

The cells in 2*2 shapes with letters are not part of Extra-regions, Cloned-shapes, or Killer-cages.

I think its difficulty is close with that of competition puzzle.

Files to download:
One puzzle per page(for teams) (Only serial number and name, no instructions)
4 puzzles per page(for individuals)(No any text)