New feature: Besides the "Watch Hand Method" it is now possible to show and print both possible values and candidates as digits.
New feature: Some performance improvements for generating new problems (unfortunately this function is still not really fast, a redesign might be necessary to calculate new problems much faster).
New feature: New option to add a comment for the current Sudoku problem. This comment is printed out below the problem.
New feature: When solving a problem interactively it is now possible to mark "candidates" for cells. When printing, these candidates are printed also.
Corrected Bug: When calculating more than one solution for a problem, it happend in some cases that the displayed solution was marked as "invalid" even though it was a perfect solution for the given problem. This has been fixed.
Corrected Bug: When prining a problem it sometimes happend that not only the given problem but also some other (calculated) values in some cells were printed out. This has been fixed.
New feature: The program now shows only those hints, which are quite obviously and not dependent on solving other hints.
Corrected Bug: In some cases the program didn't handle modified problems correctly. This has been fixed.