sharkdp/great-puzzles

A curated list of great puzzles

great-puzzles's Issues

Add the three voting prisoners puzzle?

http://puzzling.stackexchange.com/questions/22784/three-voting-prisoners

Add the burning-ropes puzzle?

https://www.ocf.berkeley.edu/~wwu/riddles/easy.shtml#nonhomogRope

Question about initial conditions of Blindfolded tricks #1

Very interesting. If you can put puzzles up on github, I suppose issues can be filed against them (and I assume that anyone reading would expect spoilers).

In the first Blindfolded tricks puzzle:

[You are blindfolded and] There is a deck of 52 cards on the table in front of you. Ten of them are face-up and the rest are face-down. Split the deck such that each new stack has an equal number of face-up cards.

It is not at all clear to me how the cards are laid out (which makes it difficult to permute them, mentally, in order to solve the problem.) Is there one stack of cards? Are there two, with different numbers of cards? Are they, perhaps, splayed all across the table?

On a close re-reading of the answer, it would seem they are all in one stack to begin with, and, also from the answer, I'm assuming that the ten face-up cards are shuffled amongst the face-down cards.

Maybe I don't play with cards enough ...

Add the missing square puzzle?

This is well-known and quite simple, but is fun:

https://en.wikipedia.org/wiki/Missing_square_puzzle

Add the blue-eyes META puzzle?

http://puzzling.stackexchange.com/a/242

wizards and dwarves

another possible solution to minimize the number of dwarves killed is as follows:
each dwarf has to say 'black' or 'white'.
Each dwarf speaks the color of the hat being worn by the dwarf in front of him/her.
This way, only the first dwarf shall be killed in the worst case. All other dwarves shall know the color of their hat, for certainty.

Am I missing something ? it feels lot more simpler solution as compared with computing parity