Sudoku

Death Blossom (a.k.a. Aligned ALS Exclusion) This strategy is based on extending Aligned Pair Exclusion but uses Almost Locked Sets to make ...

This strategy works with single numbers. We've already used closed loops of conjugate pairs to find things like X-Wings and Sword-Fish. ...

Unique Rectangles Unique Rectangles takes advantage of the fact that published Sudokus have only one solution. If your Sudoku source does no...

Remote Pairs I've coined Remote Pairs to distinguish this new strategy/test/check, whatever, from the simpler more obvious pairs. Since ...

Aligned Pair Exclusion (APE) This is an interesting strategy since it overlaps with Y-Wings and XYZ-Wings but uses very different logic. AP...