HoDoKu {0}

{8}

All the possible positions of the value {1} in {4} base {2}s are in the same {4} cover {3}s. The number of bases matches the number of covers, and each base must contain the value {1}; so each cover will have a {1} in one of the intersecting cells.

Hence other possible positions of {1} in the {3}s but not in one of the {2}s may be removed.

Therefore we can remove {6}.

Explanation

A Franken Fish has a box as at least one of the base OR cover regions. In a basic fish all regions are rows/cols and covers are cols/rows. In Frankenland we throw in boxs as bases OR covers, but not both. That's all. All the other Fish rules remain unchanged.

Note that Hodoku mixes-up Frankens and Mutants. Everybody is entitled to there own definition, especially when we get into the nitty-gritty, hence hobiwans definition of Franken verses Mutant is as equally valid/invalid as mine. There is more than one way to do it! My definition is just a tad "squarer", I think, for now, sort of. Oh, forget I ever mentioned it.

{5}