The Whip is Denis Berthier’s terminology. If you google Sudoku Whips you will see his stuff. Hodoku is a sudoku application for playing sudoku on your computer. You can google that also. You might want to google Sudoku lassos also. Here is one of his WEB pages. d I have looked at some of hyis examples and still don’t quite get it. I think it may actually be a uniqueness test – not sure he would admit that. Are your familiar with his 3D chains – only nrc(z)(t) and nrc(t) chains. Supposedly only those do lassos apply to. I have tried working through one of his examples – if you are interested I could share that with you? Here is one of Denis Berthier Links relavent to this:

I am still trying to figure it out myself. I can do it mechanically, but I still do not understand why it works. Berthier has posts about it and he has conversed with me some. So I am still working on it. Got distracted by coding Sudoku and solution into a shorter string – 48 chars so far. And trying to decide if a sudoku canonical form is something I need to understand. Shalom, Richard

That’s it? How about your own analysis of how to find a whip, and why it works.

Also tell us who and where is hodoku, and who named the “whip”. C’mon.

The Whip is Denis Berthier’s terminology. If you google Sudoku Whips you will see his stuff. Hodoku is a sudoku application for playing sudoku on your computer. You can google that also. You might want to google Sudoku lassos also. Here is one of his WEB pages. d I have looked at some of hyis examples and still don’t quite get it. I think it may actually be a uniqueness test – not sure he would admit that. Are your familiar with his 3D chains – only nrc(z)(t) and nrc(t) chains. Supposedly only those do lassos apply to. I have tried working through one of his examples – if you are interested I could share that with you? Here is one of Denis Berthier Links relavent to this:

http://denis.berthier.pagesperso-orange.fr/HLS/

I am still trying to figure it out myself. I can do it mechanically, but I still do not understand why it works. Berthier has posts about it and he has conversed with me some. So I am still working on it. Got distracted by coding Sudoku and solution into a shorter string – 48 chars so far. And trying to decide if a sudoku canonical form is something I need to understand. Shalom, Richard