Difficult Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 46: Two Difficult (DiffLev 11-14) Stickhandler Puzzles (numbers 171-172)
- Step-by-step instructions for solving Puzzle 171, (91/144) Diff: 11/997.5799.9961
- Step-by-step instructions for solving Puzzle 172, (90/144) Diff: 14/77.5899.9842.3692