What is The Night Porter?
The Night Porter is a free printable 8×8 murder Sudoku case designed for about 25 minutes. Download the US Letter or A4 PDF, place all 7 suspects so every statement is true, and identify the murderer. Each one-page file includes the puzzle, deduction notes, a compact rule guide and an upside-down solution.
What is inside this printable case?
The investigation uses the Bar, Corridor, Lobby, Lounge, Office, Reception areas. One victim is already fixed on the board. The remaining suspects must be placed so every row and column contains exactly one person and every statement can be true at the same time.
- one coordinate-labelled 8×8 room plan;
- 7 suspects, one victim and their statements;
- a lined deduction-notes area;
- a compact investigation guide;
- a small upside-down solution and murderer line.
How do you solve a printable murder Sudoku case?
- Keep the pre-placed victim in the printed position.
- Place every suspect exactly once.
- Put exactly one suspect in each row and column.
- Respect rooms, walls, furniture, directions and exact distances.
- When every statement is true, identify the suspect sharing the victim’s room.
Use the notes area to record exclusions before committing a suspect to a cell. “Beside” means orthogonally adjacent in the same room; diagonals do not count, and a wall breaks adjacency.
Which PDF paper size should you choose?
Choose the US Letter edition for 8.5 × 11 inch paper used by most home printers in the United States and Canada. Choose the A4 edition for 210 × 297 mm paper. Both use portrait orientation. Print at 100% or Actual Size for the intended margins; colour is optional.
Detective Sudoku for iPhone / Real hints
Want a hint without revealing the solution?
The printable gives you the complete case and keeps its answer upside down. In the Detective Sudoku game, real hints identify the clue behind the next deduction and explain why a suspect can—or cannot—occupy a position. They do not simply hand you the answer or solution.
See how Detective Sudoku hints work →Frequently asked questions
Is The Night Porter a classic number Sudoku?
No. The Night Porter is a spatial murder mystery puzzle. You place suspects on a 8×8 room plan so every written statement is true, with exactly one suspect in each row and column.
How long does The Night Porter take to solve?
The estimated solving time is about 25 minutes. Your time may vary depending on how often you use the deduction-notes area and whether this is your first Detective Sudoku case.
Does the printable include the answer?
Yes. The one-page PDF includes a small upside-down solution and murderer line at the bottom, so you can check the case without seeing the answer while you solve.
Do I need the Detective Sudoku app to play?
No. The PDF contains the grid, suspects, statements, rules, deduction space and solution. The iPhone game is a separate way to play more cases and request real explanatory hints.
What paper size should I use?
Choose US Letter for 8.5 × 11 inch paper or A4 for 210 × 297 mm paper. Both editions use portrait orientation and should be printed at 100% or Actual Size when possible.