Logic Masters Deutschland e.V.

Hello, this is my first puzzle on LMD, I hope you enjoy!

Flavour text is marked with italics, so avoid it if you couldn't give a honk about the geese.

The goose population is out of control, not unlike a caboose on the loose! They refuse to choose a truce, so our only option is to addle their eggs. In order to not arouse the mother and father goose’s suspicions while we spruce up the eggs, I must introduce the following rules:

SUDOKU: Each row, column, and 3×3 box contains the absolute values 1–9 exactly once.

ANTI-KNIGHT: Cells a knight’s move apart have different absolute values. Geese are famously sticklers for the rules of chess.

NEGATIVE: Each row, column, and 3x3 box contains exactly one negative digit. Each absolute value 1-9 is negative exactly once.

KILLER: Each cage sums to zero. Repeats are allowed wherever the other rules permit. Each nest addles to a goose egg so that the parents think conditions are in perfect balance for incubation.

LITTLE KILLER: Each marked diagonal sums to zero. Repeats are allowed wherever the other rules permit. Both the mother and father goose's patrol routes addle to a goose egg so that they don't suspect a thing while on patrol.

Your deducing is our only hope of reducing the goose-reproducing before it's too late!

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