Single-step and ten-step are disabled, how do I enable them?

A. These functions are disabled whenever trial-and-error is an allowed solving technique. This is because, with trial-and-error enabled, the grid could be left in an incorrect state after the allowed number of steps. To enable the single and ten step functions, disable trial-and-error (Actions -> Solving Techniques -> Trial and Error.)

What People Say

This is absolutely the finest Sudoku related program in existence! I have been using it for many years and have had excellent support and updates. Highly recommended. I use it everyday!
Phil Salisbury, California
More …

No malware No spam
McAfee Site Report
Web of Trust