TLDR: No evidence of foul play
has been accused of fixing outcomes, especially with their Blackjack game. In an effort to get a deeper understanding of how gambling on the blockchain works and if it is fair, we decided to do some research and analysis. I listened to and read about parties accusing Kryptogamers of cheating, spent the past week picking brain and discussed this with developers who have a much deeper understanding of the blockchain than most. After researching the subject and getting a clearer picture of how it works, I know that they cannot possibly impact the cards once the first card is dealt.
, who is the author of this post is up almost 1200 Steem with over 9000 games played (July 29, 2019 20:40pm EST) so the claim that no one is up is false, there must be others too. Please note: Not all those games were Blackjack. Accusation 3 is false!
As you can see there is a 0.35% edge in favour of the house, so every Steem you bet you are likely to lose 0.0035 in the long run if you play a perfect game.
The most common mistake made when calculating odds is the gamblers falacy where people think that if something happens x times in a row, then it's must be unlikely that it will happen again when in reality the odds of it happening x + 1 times is exactly the same as it happening the first time if you are already at x events due to events being independent of each other. The worst outcome I saw was rolling above 50 something like 18 times in a row. That's one in one quarter million! Please share your stories of extreme events below.
A provably fair casino gives you the ability to verify the fairness of your bets. In theory, such a casino can’t/won’t cheat you when considering that they’d easily be caught.
Smart contracts platforms like Ethereum and NEO make it impossible for gaming sites to alter results. Games on these platforms are governed by programming code, meaning there’s no chance for a casino owner/employee to change anything.
Basically, a provably fair casino is all about transparency and allowing you to enjoy fair gaming without worry.
Source https://www.gamblingsites.net/blog/pros-and-cons-of-provably-fair-casino-games/
Kryptogames made a post about it here But we are going to try and dumb this down for you. As mentioned in the article above each hand (outcome, game) is the result of mixing three things: A client seed, A server seed, and a something which isn't repeatable called a Nonce. Instead of a Nonce, Kryptogames uses the Steemit Transaction ID. Let's look at each one separately.
You can change your client seed at any time, this is determined by your browser, you can also edit it yourself in the memo. Kryptogames has no influence over this!
This is fairly confusing and took a while to understand. But their server seed is chosen in advanced of a bet according to a randomization code that is open-sourced and available to audit in the library here, then the server seed hash is published to the blockchain before you make your bet.
You can see that they publish a new random server seed every minute to the blockchain in the above screenshot. You can go to https://steemworld.org/@kryptogames and look at the account operations to verify that this seed does indeed change every minute. Thanks, 
There is no way your Steem Transaction ID can be manipulated by Kryptogames if you think this is possible, I suggest you exit Steem right now. Your transaction ID is generated by the blockchain. You can find it on www.steemd.com/@username or www.steemworld.org/@username here is my Transaction ID from the 1 Steem blackjack hand above. Note, I lost! 114491b277a15118e8a30a8c2ae1f9bf0d5d4499
The three seeds or strings of characters are fed into an algorithm:
crypto.createHmac('SHA512',client_seed + trx_id.substring(0,10)).update(server_seed).digest('hex');
This means they take those random numbers and letters from the 3 seeds above, mash them up and get a 128 string of hexadecimal characters. The SHA 512 Algorithm is not something Kryptogames made up nor are they lying about this process read all about it here. https://en.bitcoinwiki.org/wiki/SHA-512
It's a base 16 number, most of us only understand base 10 numbers, base 16 includes 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, a, b, c, d, e, and f each card is represented by 2 characters in the string. Luckily you can convert Hexidecimals to decimals with this calculator
https://www.rapidtables.com/convert/number/hex-to-decimal.html
*The 128 string is divided into 2 characters each which can be 0-255
*They throw out integers above 208, there are only 4 decks of cards 4x52 = 208! They divide the integers by 52 and add the remainder. So the numbers will always be 0-51
-Note the Server seed, Client seed and Steem ID are all verifiable and happened. You can use a blockchain explorer to verify this such as Steemworld or Steemd. None of this is made up.
Output: final_sequence = 3,1,22,39,23,4,9,38,27,34,19,19,7,14,45,29,30,42,30,31,43,17,10,41,35,0,4,30,42,45,49,35,48,11,16,34,20,11,45,32,32,36,25,0,2,5,49,33,18
Add one (+1) to each number and you can see your cards.
I got 3 + 1 = 4s , the dealer got a 1 +1 = 2s, my second card was 22+ 1= 10h, shoot, I got 14, dealer is showing 2. I assume the dealer is gonna win, so I hit (dealer has a 39 + 1=40 or an Ace of diamonds), I hit a 23 +1 = Jack...%$@#$@# bust! , even if I stayed dealer would have got that jack, for 13 and then got a 4+1 = 5s 13 +5 = 18 for a win = my loss.
I am not a programmer but 
This does not mean they could manipulate the cards, they could simply just throw away a certain server seed if they don't like how it interacts with the first 3-second Steem transaction ID, before the next 3-second Steemit transaction ID is created and impact the results of a large full tilt gambler who they happen to be watching. This is the only plausible scenario for manipulating the cards and it is highly debatable. I would like to hear what all parties think about this below.
TLDR: The only way a hand can be manipulated is by hitting the reset button once every minute very close to on or at the minute to screw with a full-tilt player (aka skipping nonces)
, , are in no way accusing that Kryptogamers is skipping nonces are you able to prove you aren't skipping nonces (not that I am accusing you of it, I just think it could be possible)
