Death Blossom
A stem cell whose candidates each link to an almost-locked set.
Learn the Death Blossom technique: a stem cell links each candidate to a petal almost-locked set; a digit shared by all petals is trapped and cut elsewhere.
How to use it
- Pick a stem and its petals. Choose a stem cell with three or more candidates. For each candidate, find a petal almost-locked set that holds that digit and is seen by the stem on it.
- Find the shared digit Z. The petals must all share another candidate Z that is not one of the stem candidates. Whatever the stem turns out to be, its petal collapses and is forced to place Z.
- Eliminate Z across the petals. Because Z must land in one of the petals, remove Z from any cell outside the flower that sees every Z candidate across all petals.