Logic-5-Spot-r4 Thumbnail of a Logic-5-Spot-r4 puzzle.

Size:
5x5.
Elements:
L, O, G, I, and C.
Groups: Sixteen total.
The 5 rows.
The 5 columns.
The 5 pentominos.
The five shaded spots.
Instructions:
Precise details on group numbering.
Answer grids:

Puzzle Difficulty levels and Examples

Difficulty LevelLowHighExample
Easiest 2 2
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