Recently I put the top50000 to my solver and it solved 8676 of the sudokus.

After reorganizing some aspects which affect evaluation order, the same solver

solved 8677 of the sudokus (no backup to spot the diff )

I asked myself if I did make (or correct) a bug without noticing.

Then I asked myself if for the solving methods I use, ordering makes a

difference, i.e. the application of a specific solving method and the

subsequent elimination of candidates prevented some other method to

match.

In my case the methods were:

Naked/Hidden Single/Pair/Triple/Quad, all intersection variants,

APE, X/XY/XYZ/WXYZ-Wing, XY-Chain and Simple Coloring.

(no fishy stuff, no methods depending on uniquenes, no advanced ALS,...)

Does anybody have an example where the elimination of one of these

techniques prevented use of another one, when ordered "the wrong way"?