Siamese Sashimi Mutant Squirmbag
Uses equal-sized groups of rows, columns, or boxes where one digit appears only across the other group.
All candidates have been entered in the empty cells.
Any true candidate 5 in A conflicts with 5 in 2 cells in C. The case with no true candidate in A is proved below.
Any true candidate 5 in B conflicts with 5 in cell D. The case with no true candidate in B is proved below. Remove candidate 5 marked × in 2 cells in C and cell D.