Write a digit from 0 to 6 on every short edge segment of the grid.
The number printed inside a triangle is the sum its three surrounding edges must reach.
Every three-digit combination — 0 1 4, 2 2 6, and so on — appears exactly once across the
whole puzzle, and a triangle attached to the grid by just one side carries the same
digit on its two free sides.
Tap an edge to select it, then use the pad below.
Pinch to zoom, drag to pan, double-tap to fit. Pencil mode stores small candidate digits.
Archive
One puzzle a day, easier early in the week. Your progress on each day is kept while this page is open.
Settings
Auto-check
No checking. Deduce in peace.
Theme
Puzzle
Solved
Every triangle adds up. Every combination used once.