Bitcoin Forum

http://bitcoin-derby.com/images/advert.png

We were tired of playing the same old BitCoin games, so we decided to come up with something fun and new. We just loved visiting the arcades and spending our pennies on all the wonderful arcade games, eating ice cream and having fun so we decided to bring a bit of that magic to you.

Play this vintage-style derby racing game using BitCoin or BurstCoin. Play for fun with small amounts,  0.002 to 0.02 BTC or 2,000 to 20,000 BURST, but WIN BIG with our top X 25 multiplier!
We're a new company and we'd just love your feedback on this new game, or tell us what future games you want to play!

http://bitcoin-derby.com/ (http://bitcoin-derby.com/)

the site is really nice, but not have the provably fair? Is the first thing i see in new gambling site. Later, you can add a faucet or a fun games mode for simply test a site

From the picture in the OP, it looks good. But when I tried to access your site, I feel it quite heavy to load...getting stuck..
"Play for fun with a small bet amount 0.002-0.02btc" does it mean that the minimal bet is 0.002 and max bet is 0.02btc?
If the answer is yes, I think your minimal bet is quite high...and I believe this is not a good start to a new site. Perhaps you need to reduce the minimal bet..
One more question, is your game provably fair?

maximum bet is really low i think, minimum bet is also high, i think you should let people bet from 0.0005 to the amount that your funds let

Thanks for the replies already!

Right now it uses arc4random_uniform() to generate winners but retrospective provability will be coming soon.

Min bet is 0.002 BTC, max bet is 0.02 BTC but I can change these very easily.
I was a bit worried about transaction fees swamping the minimum bet but I don't mind lowering it.

Any comments on the user interface? Is it too complicated to work out how to use the site?

i think lowering the minimum bet and making bigger maximum would surely attract a lot of players to your game who would like to try it out

OK, I lowered the min bet to 0.0002 BTC. When more people try it out and report back then I'll raise the upper limit too!

I have see the site with 2 pc/ip different, and the address for deposit is the same for all users? 1DerbyR7HJfEcRdhzaK4gwQgyXZ52co2r7  ??

yes but it varies depending on which horse you want to bet on:

red: 1DerbyR7HJfEcRdhzaK4gwQgyXZ52co2r7
blue: 1DerbyBW6CEfYSwRgceEHtk72jottXcUUc
green: 1DerbyGZZfN1yZpHKx8vTY167X3NDwPutQ
yellow: 1DerbyY8osKYeUs5kq967MLTpSz7AdWBLP
white: 1DerbyWua9JtbwafFSsvdKvFYn91kuDnzB

winnings get sent back to the player's sending account

I'd say that it is not a deposit address, but bet address. The way you play the game is like in Luckybit, it is a on-chain game. Players will need to pay miners fee for every single bet.


If you worry about the transaction fees, better to change your game into off-chain game.
And when a player win, who will pay for the miner fee? your site or the player?

Ha!  Nice game, I remember this type of game.  Too bad I always loose when I play it lol.

I saw the white horse winning, but im afraid to see the max multiplier winning when im watching it feels like this are only for show to attract players then they manipulate the rolls

Site pays transaction fees for winnings.

The white horse has to win SOMETIMES!
Also, the race you see is exactly the same race other people on the site see - at the same time too!
Multiple people could be betting on the same race.

---edit---

Just to clarify - because everyone sees the same race at the same time then there's no possibility that you're seeing white horse wins to reel you into playing.
Also, winners are currently generated using arc4random_uniform() but I can see provability is an urgent feature I need to address.

Max bet * max multiplier = .5btc


Care to show proofs of your bankroll? Can you pay several users hitting max multiplier?

thanks panjul07, now i have understand.
But someone have test the game and received a payment?

I remember these games in the arcades, still there in some local ones.  I see that you need to select your horse and then send your coins to the address supplied, maybe I have missed something but it would be nice and a bit quicker if you could top up your account and not have to select and then send coins each and every time.  Would be interested to see if anybody hits the big one and if you are able to pay out multiple winners.  Cool game though, brings back some memories

I think you're right: it looks like we need to add some form of registration so people can load up their account and play by just pressing the "Bet Now" button.
Would save a lot of fees!

I think I have an idea of how to do the provability - will get back to you when I've tested it.
Pretty much time to go to bed here though.

I think no one played the game so far, since there is no provably fair verifier yet and there is no statistics on the site.
Hope those two things will be added as soon as possible.

Yes that site looks weird and horrible to play there without provably fair system, i think OP will explain how this site generate the bet result and i cant be manipulated on big bets, statics will nice addition to see how much wagered there and who got big profit there. these addition can build trust to get active players.

Another request here for provably fair.  It looks like fun but without a better thought out site I will pass for now.  Best of luck!

Hmm. I just tried using the latest TX hash (by timestamp) from the bitcoin node's memory pool but I'm not sure that's going to be good enough.
Network propagation delays mean that other nodes might have a different latest TX to the node I'm using.
Even if I picked the highest-value TX from the memory pool I suspect the same issue would apply.

Example from game logs:


But when I look up that TX at blockchain.info:


And this is with the game server synced using NTP with offsets, delay and jitter sub 10ms.

Awesome game this brings back beautiful memories with my family staying at the sea side every summer, It really does and you have created something brilliant to me an you can count me playing weekend evenings. When people create something different to what the majority are doing = awesomeness, well done!

Okay I think I have the answer to the provability issue.
I'm off to bed now but will discuss it with my co-developer tomorrow and hopefully implement it tomorrow too.

Many thanks for the feedback everyone! I hope we can get this game up to scratch soon so that we can make more olde-worlde arcade games for people to play!

Is possible play with burstcoin ? Is the first time i see a dice or betting site, that accept direct burtcoin, how did you implement them , given the kind of wallet that?
If you add a provably fair, sure you find more user like bet to the burstcoin thread

Actually it was a damn sight easier to implement the Burstcoin support than the BitCoin!
For BitCoin I have to find the player's account by looking up the previous transaction's output scripts, etc.
For BurstCoin the actual play transction has the sender's account directly in the transaction data. Way simpler. The API calls are easier to use too.
I still had to write code to confirm payouts (after a few blocks).

The BitCoin module to the game is almost twice as many lines as the BurstCoin module!

Okay, we've now added pages for provability, recent bets and highest winners/hall of fame. (They can be found under the "About" tab)

Is better add directly a page and a link with provably fair, is the option more important to the site.
Later you have add this, you have add your site to the burst coin official thread ? Is important because no dice accept burstcoin

Haha no way, I used to love this kind of horse racing game at the arcades when I was a young boy, I used to play them all the time. Great idea to attract people aged over 25 or so, the pic in the OP made me smile, brings back childhood memories hehe.
I will sign up to this site when I have some spare time, might have a play with a small amount of bitcoin :)
Good luck with the site guys, great idea, love it.

yess the game is provably fair now and we can verify this this is one of the most improtant features for any gambling site in te bitcoin sphere hopefully this will attract many more users as you guys deserve many users as the site is actually quite fun :D

Would be better if you put the provably fair page in new tab beside "about" tab.
Or somewhere outside. the website very simple and the game very simple too. I like it.
Just the website design need to fix for better looks.