[godfrey]

On advice, I bought one of those Sudoku machines. Eventually got the hang of all the buttons but didn't like the display. A bit small and needs to catch the light right to see well. It was giving me headaches.

Still, I use it to set each problem; transfer it to a sheet of paper for solving and then, although I know if I have it right, just enter the final result to see it pass the solution as 'good'.