Logic Masters Deutschland e.V.

Today I am happy to present a hybrid of tetromino and sudoku :-)
I hope you will enjoy and I would be really grateful for all the comments and ratings.

Tetromino:

Tetrominoes: Shade some cells in the grid to form tetrominoes (blocks of 4 cells), which cannot be orthogonally adjacent, and must form a diagonally contiguous area. Two tetrominoes which touch each other at the corners must have different shapes, counting rotations and reflections as the same. Additionally, no 2×2 region is entirely unshaded.

Kropki dots: Cells joined by a white dot are both unshaded, cells joined by a black dot are both shaded, and cells joined by a gray dot are one unshaded and one shaded.

----------------------------------------------------------------------------------------------------

Sudoku:

Normal sudoku rules apply.

Killer: Digits in a single tetromino may not repeat and sum to 23.

Kropki dots: Digits in cells joined by a white dot are consecutive. Digits in cells joined by a black dot are in a 1:2 ratio (i.e., one digit will be double the other). Not all dots are necessarily given.

X/V: Digits in cells joined by an X sum to 10. Digits in cells joined by a V sum to 5. Not all Xs and Vs are necessarily given.

SudokuPad Link

Tetromino Explanation:

You can see on the example above (author bakpao) how tetromino works. You can also try to play a big tetromino puzzle before you solve the sudoku, link here (author jovi_al, puzzle came from the GAPP series in the CtC Fan Discord). Rules are also explained here.

The Erica Series:
Episodes: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

If you liked this puzzle, I recommend trying out my other puzzles:
Symmetrical Fan
Night Club
Cops & Robbers
Broken Flashlight in the Dark
Blown Fuses in Electrical Installation
Important Hour on the Clock
Let Me Introduce Myself
Positive Symmetry
Pretty Odd Shaded Area <- Recommended for you!
It's What You Do in the Dark That Puts You in the Light
What Was the Sum Again?
(+5)-Yang <- Recommended for you!
Disgroup Joints
Find It All
What the Fog?
10-Arrows
Negative 8 YY <- Recommended for you!
Why-Why? <- Recommended for you!
French Wrench