Bitcoin Forum

Bitonic has sold over 200 000 bitcoins! To celebrate, we are giving away one bitcoin to the fastest puzzle-solvers.
We releasing a puzzle every businessday. Today is part II, with a prize of 0.2 BTC.

The next puzzle will be available at 15:00 CET:
https://bitonic.nl/puzzle2016/ (https://bitonic.nl/puzzle2016/)

When the correct answer is submitted, the output will be sent to the winning bitcoin address.
https://www.blocktrail.com/BTC/tx/4af546ef58f01585f3bbdc14c7181bbd9fc5c31adf075dfff3bacba2f025e0c3 (https://www.blocktrail.com/BTC/tx/4af546ef58f01585f3bbdc14c7181bbd9fc5c31adf075dfff3bacba2f025e0c3)

Good luck!

I would like to know the winner of the puzzle and the answer here ! I have saved a lot of answers but none of them were true .

we are waiting and sooo excited

+1, can't you change the timer ? :P

Nice promotion :D and nice puzzle,
where I can find the solution of first one?!? :)

Posting here to keep notified of the puzzle.

The solution was: christiaan huygens, you see it also here (by the questionmark):
https://bitonic.nl/puzzle2016/ (https://bitonic.nl/puzzle2016/)

Good luck!

how can you know the name of the winner ? there is no command to enter a name !

Who won the last puzzle ? Bitcointalk username of the winner of last puzzle ? Basically, you don't need to create new threads.
Critically, This is not provably fair game (The username of the winner is yet not known)
P.S. Ironically, watch mode activated.

After it starts there is form where you can put your btc address and if you win you will get paid to it.


Maybe he just didn't have account?

According to Reddit, this is probably the winner of the first puzzle: https://www.reddit.com/r/Bitcoin/comments/3zv0vq/bitonicnl_has_sold_over_200_000_bitcoins_to/cypcb8g (https://www.reddit.com/r/Bitcoin/comments/3zv0vq/bitonicnl_has_sold_over_200_000_bitcoins_to/cypcb8g)

And here's the winning transaction: https://www.blocktrail.com/BTC/tx/04108cc074324477613cd630f48325bab1695dcffad638ce850b60d24ca00315?txinIdx=0 (https://www.blocktrail.com/BTC/tx/04108cc074324477613cd630f48325bab1695dcffad638ce850b60d24ca00315?txinIdx=0)

I think OP need to solve this confusion.

2 minutes  ??? :D

am wondering what this is aswel ::) ::) ::)

is the answer related to bitcoin ?

another puzzle has been out

here the question


what is that code ?

Absolutely no idea! :-\

someone solved it already  :o

The puzzle was solved in 15 minutes!

This puzzle was a cryptographic puzzle, the so called playfair cipher.
How to solve the puzzle is explained here:
https://en.wikipedia.org/wiki/Playfair_cipher (and on a dozen other cryptography websites).  (https://en.wikipedia.org/wiki/Playfair_cipher (and on a dozen other cryptography websites).)

Puzzle 3 will go live next Monday, 15:00 CET, for 0.2 BTC.

really what is this ???

https://en.wikipedia.org/wiki/Playfair_cipher#Example

I still don't get it ;D

i got the hint about playfair cipher :D but i still dont know how to know the answer :D

looking in wikipedia too but can't find anything,,,or maybe my brains can't think about Playfair_cipher

Deciphering the text gives:

survived , what was the answer of the puzzle ?

two thousand hundred

Wow great idea! I loved it. I new it was encrypted, but I was too dumb to decode it. Can you make one puzzle easy for idiots like me? :)

A puzzle game. ( Goes above my head )Same. The concept / rules / how to? of the puzzle is not clearly explained by the OP.
@OP : Explain the rules in simple words. Your current concept is against the solution/answers.
Firstly, clear me/us about the Concept for words -> words can be one or two or more ?
Secondly, The solutions/answers are "not" bitcoin related.
Thirdly and lastly Op says to find a "word" but the solution comes in "words".

I tried solving the play fair cipher but I'm getting a different answer.Like my first would starts with FOUR.Anybody who can solve please cross verify please ?

EDIT : If you don't have any idea how the cipher works,please refer to this video here : https://www.youtube.com/watch?v=LTL1aZteIXE

will it be happen everyday really ?
http://prntscr.com/9njtaj

Like Yesterday,even this contest was won by an address which doesn't have any past transaction history.Shady.
https://blockchain.info/address/1JhZWqKYQ2cxWhb4WJMKipA5LmxszpUrfP

It says something about requiring a key to solve the code. Don't know what's the key for this.

http://s15.postimg.org/sffx1xok7/Screenshot_1.jpg (http://postimg.org/image/sffx1xok7/)

bitonic.nl is establishment of Netherlands.the posters name in reddit is BitcoinNL look at picture.

like Jantsen said

winner adress of first puzzle had no transaction history like this.

so S.U.P ? are we working for nothing ? :S

well absolutely scam,your solving the puzzle for free.
or maybe op is the one who is earning for every correct puzzle you made.haha

What really adds on to it is,I believe the contest is advertised on this forum and unfortunately nobody from the forum is solving the puzzle but somebody else.@OP is it like the puzzle is advertised elsewhere from this forum that we're unaware of ?

It is also on reddit and their website

This was our intention, but we changed our minds on this. I'll ask my collegue to change the OP.


The solver of the puzzle apparently knows what he/she is doing, since address re-use  (https://en.bitcoin.it/wiki/Address_reuse)is bad.


It is true that our puzzles are not "provably fair". We made the puzzles, so we could give away the answers to certain persons, this is unavoidable in this game type.


Absolutely! We post it on Reddit, facebook, twitter, IRC, our website and so on.

is this what kind of celebration ? not PROVABLY FAİR ? but its opened for users ? lol.

so then why are we working for it ?

It's not seems a simple puzzle, but I don't understand why is not PROVABLY FAİR ??
by the way I like so much first puzzle, more easy, more fascinating, I never seen something like this with btc related words :)

This is not gambling and we are not making money out of this. This is just entertainment with a small prize as bonus. We just think it is nicer way than just giving a bitcoin to a random user. You don't have to play :)

We've created bitcoin transactions that are only spendable with the correct answer. So in a way it is provably fair in that we can not change the outcome of a puzzle. We can however not prove that it isn't ourselves that claim the prize.
The next puzzle on Monday is going to be focussed on Bitcoin related words again :)

1.christiaan huygens,
2.two thousand hundred,

are they bitcoin related ?

Im a little sad about how the OP is treated here, on the other hand this is the most paranoid community I know. I remember the last time someone from NL (from blocktrail) gave away something and everyone was butthurt as well because it was not fair. They are giving away free bitcoin for fucks sake. If you dont want to "solve a puzzle for free"[1], by all means go hit a faucet for free coins.

[1] dafuq, did I just read?

So yeah,I tried solving the Cipher and the answer is not correct for the puzzle .

Now,to decrypt a playfair cipher we need a keyword .No I don't say that its your "Google Wiki link"which is a fact indeed.

Now since you haven't mentioned the Keyword ,I assumed "KEYWORD" as the keyword to decrypt the cipher .I solved the cipher and didn't get whatever your answer was suppose to be.But my answer started with FW RX. First I doubted I could make a mistake but then I cross-verified the solution with couple of online tools here :
http://rumkin.com/tools/cipher/playfair.php

http://www.dcode.fr/playfair-cipher

Seems like even they couldn't decode it (not having a keyword specified is a big issue).Coincidence is,my answer was EXACT SAME as one of these websites answers! Which gives me confidence that my answer is probably correct on the given condition and keywords(Since the keyword was not specified I have freedom to use whatever I like).

If you or anyone can prove me wrong or show me how the solution mentioned for this particular puzzle is correct.I would be convinced!Or we know what's cooking up there. ;)

EDIT : This one is quite user friendly tool for those who don't want to get involved in much technical stuff : http://www.geocachingtoolbox.com/index.php?page=playfairCipher

We created "bitcoin-related puzzles".
This are the answers. And I think this answers are bitcoin-related, but that is maybe subjective.
If you don't like it, I'm sorry....  

intersting without the keyword, someone could solve the puzzle? ??? I have doubts about the veracity of the game.

As explained in the puzzle explanation (https://bitonic.nl/puzzle2016), some subsequent puzzles require keywords from the previous puzzle to be solved. In this case, Christiaan Huygens (the solution to the first puzzle) was the keyword that you had to use for the cipher.

Is it possible that you could give the next puzzles every 26-30 hours instead of 24?

Personally, it is difficult for me to be online at 15 EST on weekdays. So, may be you could do so, so as at least a few puzzles will be convenient to people living in various time zones?

Just a suggestion.

Also url for puzzle 2 was https://bitonic.nl/puzzle2016/christiaanhuygens
I thought that might be hint but I had no idea how to use it :D

The puzzle is super extremely difficult, i have no idea how can they get the answer
Is it possible to make it easier or give extra hint for next puzzle?

Part three of the puzzle can be found here: https://bitonic.nl/puzzle2016
Today's prize is 0.2 BTC. The puzzle will go live on 15:00 CET.

https://bitcointalk.org/index.php?topic=1323327.new#new

https://bitcointalk.org/index.php?topic=1324650.new#new