Grand Sleuth · 18 May 2026 · Blackwood Hall
The clock struck the hour. The body was found. 6 suspects, each with means and motive enough — but only one with both, and the courage to act.
This Grand Sleuth case is set in Blackwood Hall and puts 6 suspects, 6 rooms, 6 weapons, 14 clues on the board. No detective filed a correct verdict on the day it ran.
Deduce cases are logic-grid deduction puzzles: read the clues, eliminate the impossible, and name who did it, where, and with what. This case was verified by a constraint solver as solvable by deduction alone before it was published. The solution is not published here — the only way to know is to work it out.
Play this case · Play today's case · All past cases · How to solve a logic-grid puzzle