Death Blossom

Expert

A stem cell's each candidate maps to an ALS "petal"; the common candidate across all petals is eliminated from cells seeing all petals.

How It Works

A "stem" cell has multiple candidates; each candidate connects to a different ALS "petal". Whichever value the stem takes, the corresponding petal activates. If all petals share a common candidate Z, any cell seeing all petals can have Z eliminated.

A generalization of ALS-XZ; very rare in practice.

Example

23456
256
8
35
14
9
1257
24
67
1
259
3459
35
67
259
248
89
456
7
4569
2
14
8
159
3
69
25
259
1873
29
64
347
8
34
692
37
15
2367
269
369
154
2379
28
789
56
3
56
781492
842935671
917426853
Key cells of the techniqueCells where elimination is appliedCandidate to be placedEliminated candidate (crossed out)

Practice with a Real Puzzle

This 9×9 puzzle is solver-verified to require this technique on its solution path.

Expert25 givens