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15 Triominoes (Posted on 2016-07-26) Difficulty: 3 of 5
A tiling is said to be fault free if there are no straight lines which can split the tiling without intersecting a tile.

Two L-triominoes trivially form a fault free tiling of a 2x3 rectangle.

Find a fault-free tiling of a 9x5 rectangle using 15 L-triominoes.

No Solution Yet Submitted by Brian Smith    
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Comments: ( Back to comment list | You must be logged in to post comments.)
re: Harder case | Comment 3 of 4 |
(In reply to Harder case by Jer)

Can you post your proof that all the tilings must be fault-free?  I would like to see it.
  Posted by Brian Smith on 2016-07-27 11:19:17

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