### ... by: PeteTy

the stratagety Bar to the left has no links to the killer strategiesonly the killer solver can get here

conversely the killer strategies dont link to each other and must be accessed from the killer page

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Andrew's first site sudoku.org.uk has his old generators ALL the killers there are symmetrical ...

this site changed somewhere around mid 2012 the killers got more challenging and are seldom symmetrical

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cage splitting seems to work always

there are several sites that dont mention the killer convention (no repeated digits within a cage) and there are some sites and magazines that dont use it

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Kappa Puzzles

has several sudoku variants

one is sumoku which i jumped into with both feet to find out the answers werent coming out at all. turns out its not sudoku but killer roman squares of that 9x9 variety. and in a sudoku magazine.