Logic Masters Deutschland e.V.

Amoeba Festival

This puzzle was made for the semi-finals of the Pencil Puzzle Madness tournament. I hope you enjoy the puzzle!

• This is a hybrid of 'Nawabari' and 'Yajilin' with a unified clue-type to be described in the latter half of the rules.
• Nawabari: divide the grid into rectangular regions of cells. Every region contains exactly one clue.
• Local Yajilin: shade some non-clue cells in the grid. Shaded cells cannot share an edge, even across Nawabari region borders. Within each Nawabari region, draw a loop that travels orthogonally through the centers of all unshaded cells (except the clue cell). A valid loop requires at least four cells.
• Hybrid clues: clues indicate the number of Nawabari region borders minus the number of shaded cells in the indicated direction. (For example, a "1" clue might see three region borders and two shaded cells.) The grid-border counts as a Nawabari region border. A '?' clue contains no numerical information.

Other puzzles I've made for the tournament:
Round one: Anableps (Aquarium + Myopia).
Round two: Canyonlands (A38 + Rassi Silai).
Round three: Zombie! (Araf + Yin-Yang).
Final: Janus (Chiaroscuro + U-Bahn).