A challenge for serious extreme-Sudoku fans
Inhuman is Sudokunaut’s toughest challenge. Solving these grids requires patience, careful candidate tracking and often unusually long logical deductions.
Unlike ordinary hard puzzles, clue count tells you little here. The difficulty comes from the depth of reasoning required.
Unique solutions and solving techniques
Every Sudoku has exactly one valid solution. The reasoning needed to reach it can vary widely, from a handful of deductions to complex combinations of candidate eliminations.