I am enclosing a puzzle which leads to a W Wing at the top of 'All Possible Steps' after identifying several Locked Candidates. In the folder:
W-Wing: 6/4 in r2c4,r3c7 connected by 4 in r1c48 => r2c79<>6
one is given an alternate W-Wing with the same exclusions. Curiously, the alternate is listed twice. Not a big deal but I do not recall seeing a repetition like this before.
It is nice to have Auto Advance. Thanks. One small enhancement would be to allow a tab to move one from the end of a row to the beginning of the next row. Entering a given at the end of a row now moves the pointer to the beginning of the next row but if the last given in a particular row is not in the last column, one needs to reposition the pointer.
Best Wishes
Gordon
Thanks for your report, I will look into it.
Auto Advance: The idea was, that you type '0' for all cells, that are not givens. That way you dont have to switch between digits and cursor keys/mouse and the pointer is moved to the next row automatically.