Variations on Sudoku-by5 Logic Puzzles (Vol 1)
Chapter 19: Three Difficult Education-Xtreme Puzzles (numbers 49-51)
- Step-by-step instructions for solving Puzzle 49, (255/369) Diff: 11/999.9999.9992
- Step-by-step instructions for solving Puzzle 50, (257/369) Diff: 14/99.9999.9992.B472
- Step-by-step instructions for solving Puzzle 51, (258/369) Diff: 14/99.9999.9999.9673