In all there are
63 separate forms
of the twelve basic pentominoes that account for all possible reflections and right angled rotations.
IEX users only...the twelve pentominoes can be individually moved around the page.
Place the cursor on any pentomino, hold down left mouse button and drag.
They can be arranged on the grid so as to reveal one of the solutions to the puzzle.
3X20 Pentomino Grid
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