Info on the inventors of solving techniques?

PaulS

I'm writing a book on sudoku solving, and I'd like to acknowledge, where possible, the originators of individual techniques (Swordfish etc). Since most techniques seem to have appeared here first, I thought this would be a good place to ask!

Could anyone tell me the originators of:

Remote pairs.

X-Wing, Swordfish etc.

XY and XYZ-wings.

Forcing loops and chains.

Conjugate pair chains.

Non-unique loops and rectangles.

Nishio I've managed to work out(!) and I'm assuming that the simpler techniques (hidden pairs, intersections etc) are lost in the mists of sudoku time.

I'd be grateful for any help on this as I would like to see the relevant people credited.

Thanks,

Paul Stephens.

Carcul · Posted: Wed Jul 19, 2006 3:55 pm Post subject:

Hi PaulS.

I think you should have a look at this thread of the Sudoku Players Forum, specially the post from Mike Barker. However, I think no one knows who was the first to document the X-Wing and Swordfish techniques.

Regards, Carcul

Ruud · Site Admin

Hi Paul,

I have done a little research in these forums and added the results to my solving guide.

Another good source is the solving tips by Andrew Stuart at Scanraid. For the advanced techniques, he often credits the inventors.

cheers,

Ruud.

PaulS · Posted: Thu Jul 20, 2006 10:32 am Post subject:

Hi Carcul and Ruud,

Thanks very much for your replies and information.

It turns out I've only got about 100 words or so to get the acknowledgements in, so I thought I'd say something along the lines that many of the advanced solving techniques have been announced, refined and formally defined via this forum, then list nine or ten people (all I've got space for) who've been prominent in that effort here and elsewhere with apologies to anyone I've missed out.

I'd be happy to list the names I propose to include here, but I'm a bit scared that it would upset anyone who deserved to be on it but missed the cut (or, more likely, that I didn't know about).

If anyone would prefer not to be named, please let me know.

Paul.