Logic Masters Deutschland e.V.

This is a Yajilin puzzle with a bonus rule in each half of the grid. I hope you enjoy it!

• Yajilin: each cell (without an arrow clue on it) is shaded either green or black. Draw a loop through the centers of all green cells which travels vertically and horizontally and doesn't branch or cross itself. No two black cells can touch orthogonally. Each arrow clue gives the number of black cells seen in the indicated direction.
• U-Bahn: clues outside of the grid indicate how many of each segment (a straight or a turn) occurs in the indicated row or column, independent of rotation. (The clues only scan the left-half-grid and no further.) The "even" clues represent an even number which must be determined, and similarly for "odd".
• Masyu: if a segment crosses a black circle it must turn, and continue straight directly before and directly after. If a segment crosses a white circle it must go straight and turn in at least one of the cells directly before or directly after. Circles may be shaded black, in which case they are ignored.

Solve Homarus on Penpa+.

Solve Homarus on Sudokupad. (For answer-check, replace black-shaded cells with the letter "A".)

About the title: Homarus is a genus of lobster, notable for having dimorphism in its claws: one claw is specialised for cutting, the other for crushing.