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Cover the 7x7 square on the left with the 12 L-shaped pieces on the right. You are not allowed to turn over any of the pieces, but you may rotate them in the plane.

7x7 square and 12 L-shaped pieces

Attribution: Nob Yoshigahara

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1 Answer 1

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Here goes

    . . a a a . .
    . . a b b . .
    . . c c b . .
    . . d c b . .
    d d d c X e e
    Y X X X X f e
    Y Y Y f f f e
 

Two 2x4 rectangles were left out to make the rest more readable. The two exceptional pieces are X and Y.

Same solution, but in color:

tiles

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    $\begingroup$ I have added a picture, I think that makes your solution more clear. $\endgroup$
    – Lezzup
    Commented Oct 23 at 19:25
  • $\begingroup$ Did you use some elimination logic? If so can you add explanation to answer? like for example : rot13(vs bar pbybef fdhner gvyrf purff nyvxr oynpx naq juvgr jvgu sbhe pbearef juvgr, gura Y-cragbzvab pbeare zhfg or ba n oynpx gvyr), $\endgroup$ Commented Oct 23 at 19:55
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    $\begingroup$ Thanks, @Lezzup, appreciate it. $\endgroup$ Commented Oct 23 at 20:19
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    $\begingroup$ @FirstNameLastName The only constraint I used is the one you mention. $\endgroup$ Commented Oct 23 at 20:20

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