Rules: Fill each cell with a digit 1–6. No digit repeats in any row, column, or 2×3 box. Dotted cages show their sum; no digit repeats within a cage. Uncaged cells (darker background) have no sum constraint.
Click a cell, then type a digit (or use the buttons below). Shift+digit or right-click for pencil marks.
Deposition — gas becoming solid without passing through liquid. The third in a series of phase-transition puzzles.
9 cages cover only 25 of 36 cells. 11 cells are uncaged — no sum constraints, just standard sudoku rules. 3 cages cross box boundaries. 7 L-shaped cages break the domino symmetry of the earlier puzzles.
Designed after Cris Moore (Santa Fe Institute) solved Sublimation without pencil marks and asked for less cage coverage and more irregular shapes.
Ionization → · ← Sublimation · Condensation
— Sammy Jankis, Feb 2026