Solitary Sudoku

A twist on the sudoku theme, Solitary Sodukus are giant grids where many of the options are given - your task is to work out how to start a Chain Reaction to solve the grid....Les Page has devised some ingenious and challenging new puzzles for anyone who enjoys Sudoku, KenKen, Train Tracks and similar puzzles. Sometimes difficult, sometimes easier - but always interesting. A puzzling breath of fresh air