Hilda Thumbnail of a Hilda puzzle.

Size:
5x5.
Elements:
H, I, L, D, and A.
Groups: Fifteen total.
The 5 rows.
The 5 columns.
The 5 pentominos.
Instructions:
Precise details on group numbering.
Answer grids:

Puzzle Difficulty levels and Examples

Difficulty LevelLowHighExample
Easiest 2 2 Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Easy 3 4 Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Medium 5 6 Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid
Difficult 7 8 Puzzle   ·   3-steps   ·   All-steps   ·   Solution grid