by Serhiy Grabarchuk Jr
Two wine glasses are arranged from ten matchsticks as is shown.
Six matchsticks have to be moved get the image of a house.
The four matchsticks remain at their initial positions. What are they?
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The puzzle appeared in Bryant & May’s little book of matchstick puzzles at the beginning of the 20th century.
As is shown in the illustration, 2 inclined and 2 vertical matchsticks remain intact.