6
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enter image description here

Goal: Create a symmetric polyomino using:

  • Two pieces
  • Three pieces
  • All four pieces

Notes: This is the only set of four different pentominoes which has only one solution with 2, 3 and 4 pieces.

Point symmetry are allowed.

Line symmetry are allowed.

Rotation and reflection are allowed.

But no overlapping.

※This is the source of the puzzle. It's part "Symptomino" Here is the link!

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  • $\begingroup$ Is diagonal symmetry fine, or does it have to be horizontal/vertical symmetry? $\endgroup$ – F1Krazy Mar 23 '18 at 10:00
  • $\begingroup$ @F1Krazy Either will do. $\endgroup$ – heypix Mar 23 '18 at 11:08
3
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Since OP has confirmed that diagonal symmetry is allowed, here's a two-piece solution to get the ball rolling. For convenience, I've coloured each base pentomino a different colour and drawn on the line of symmetry.

enter image description here

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1
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The answer to the second question.

I can't solve the last question.

enter image description here

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  • $\begingroup$ This implies you found the puzzle elsewhere, rather than having created it yourself. Is that the case? If so, you need to provide a link to the original puzzle. $\endgroup$ – F1Krazy Mar 23 '18 at 11:54
  • $\begingroup$ @F1Krazy here! It's part "Symptomino" link $\endgroup$ – heypix Mar 23 '18 at 11:57
  • $\begingroup$ If you can edit the link into the question, that'd be great. In the meantime, I'll keep trying to figure out the four-piece polyomino. $\endgroup$ – F1Krazy Mar 23 '18 at 11:59

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