Logic Masters Deutschland e.V.

Normal Sudoku rules apply.

The digits from 1 to 9 have gathered for a murder mystery party in a 9-room house. Each of the 3x3 boxes in the grid represents one room in the house where a fictitious murder has taken place. The murderer and the victim must be adjacent to each other in each room (including diagonally).

A digit always faces the same direction such that if it were in the center of the grid, it would look toward the box named after it under standard box ordering (i.e. 1 faces NW [↖], 2 faces N [↑], etc. and 5 faces nowhere). Digits can see in their direction until the wall of the room (within that 3x3 box).

None of the digits in the room (3x3 box) can see the murderer, no digits other than the murderer can see the victim, and no bystanders can see between the murderer and victim (which only matters for diagonals - as an example, the digit 1 in r6c2 cannot murder a digit in r5c3 because the 9 in r4c1 looks between them, even though the 9 sees neither r6c2 nor r5c3).

Each row, column, and 3x3 box contains exactly 1 murderer and 1 victim (not necessarily in the same rooms for rows and columns). Each digit gets to be both a murderer and a victim at some point during the evening.

Determine the location of each digit in each room as well as the identities of the murderer and victim in each room.

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