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Fly in a glass

The object is to move 2 matches to get the bluebottle to fly outside the glass. At the finish, the glass may be turned in any direction, but it must be exactly the same shape as before.

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  • $\begingroup$ I can move 2 matches, make the fly fly outside the glass, AND keep the glass the very same shape, direction and position. $\endgroup$
    – Bitterblue
    Nov 22, 2022 at 13:30

3 Answers 3

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Just move the horizontal stick to the left by half width. And right vertical stick to the bottom left to get the glass turned upside-down.

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    $\begingroup$ Symmetrically you can move the horizontal stick to the right by half of its length and then the upper left stick to the down right side to reform the glass upside down. $\endgroup$
    – Ara
    Aug 17, 2014 at 8:32
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you can do it with the following sequence: enter image description here

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Solution while keeping the glass in shape, direction and position. The fly can't go through walls. So, done!

enter image description here

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