Did you clear up it? One other sport of brutal genius from South Korea | Arithmetic

Earlier at the moment I set you the next puzzles, designed by the South Korean puzzle grasp Han Dongkyu. The primary two are a gradual construct as much as what is without doubt one of the most fiendishly good geometrical puzzles I’ve ever seen.

If you would like a print out of the puzzles, click on right here.

1. Librarian’s Nightmare Half I

Divide the form under, which appears like an open e book, into two equivalent items. (In different phrases, if the form was manufactured from paper, how do you chop it so that you simply get two equivalent items with no further materials left over. Items could also be flipped over.)

Illustration: Han Dongkyu

Now divide the form into three equivalent items. (Further puzzle: if you happen to discovered this too simple, discover a second method to reduce the form into two equivalent items.)


Many individuals noticed the ‘easy’ reply immediately. Even so, it’s typically simple to overlook what’s hiding in plain sight.

Screenshot 2021-10-04 at 11.25.11

2. Librarian’s Nightmare Half II

Divide the next form (the e book and the arms) into two equivalent items. Once more, the items could also be flipped over.

Illustration: Han Donkyu


The arms should coincide, so one of many items is flipped. From there it’s a matter of utilizing symmetry to chop between them.


3. The king and the fort

Minimize the primary form under into two items, in such a manner that they are often rearranged to make the second form. The items may be flipped.

Screenshot 2021-10-03 at 09.39.17
Illustration: Han Dongkyu


Han Dongkyu gave the next hints within the pdf doc, which you may need labored out by your self. Though, even with this information, the puzzle nonetheless requires astounding spatial reasoning.

1. One of many two items fully encloses one other piece.

2. The internal piece is formed like a small dodecagon with some chess items hooked up to it.

3. You possibly can rotate or flip the internal piece to maneuver the rook-shaped gap, for instance. A rook hooked up to the internal dodecagon can fill the rook-shaped gap and go away one other gap in its authentic place

4. What occurs if there are a couple of rook and king?


And voila:


Test mate!

I hope you loved these puzzles. I’ll be again in two weeks.

Because of Han Dongkyu for at the moment’s puzzles. His web site is queuedlab.com

LLPB paperback

I set a puzzle right here each two weeks on a Monday. I’m all the time on the look-out for nice puzzles. If you want to counsel one, e-mail me. I additionally give college talks about maths and puzzles (restrictions permitting). In case your college is please get in contact.

My most up-to-date e book is The Language Lover’s Puzzle E-book, which is out in paperback this week.

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