Quote from: libertaad on March 26, 2013, 08:09:56 PM

Congrats on the launch! Your product looks amazing, and I wish you much success! I'm really glad to see bigger players entering the bitcoin gambling market.

I do want to address one issue you brought up:

Quote from: BitcoPlay.com on March 26, 2013, 07:20:31 AM

Ahh, so? Then how about this...

We are ready to give a prize of 5 BTC to you (or anyone else) who can prove scientifically that the following statement is wrong:

You can develop a provably fair video slot game that has a payout of 75% only, yet players will not be able to prove this fact unless they do statistical analysis of the actual payouts of the game or have access to the server-side source code.

Unless the above statement is proved wrong, then ANY casino claiming to be provably fair CAN potentially CHEAT in video slot games.

I want to address this, because we do provide provably fair slots, and we specifically indicate that our game offers a 99% return-to-player. We spent a lot of time ensuring that our slots game is indeed provably fair, and even developed a novel technique for computing a slots outcome from any shuffled deck, so that our existing provably fair methodology could be applied to our slots game as well.

As long as the house provides the reel-configuration and the pay-table (which are both easy for players to verify without doing in-depth statistical analysis), it is possible for a player to calculate the return-to-player percentage of any slot machine. For an example, take a look at the wizardofodds.com game design for their slots game: http://wizardofodds.com/play/slots/australian-reels/5-line/math/. Given only the reel-configuration, and the pay-table, they calculate the exact payout.

As another example, our provably fair slots game has the following count of symbols per reel:

Code:

Symbol Reel 1 Reel 2 Reel 3
b3 1 5 3
b2 5 1 6
b1 8 10 1
z3 5 3 6
z2 6 6 7
z1 7 7 9
32 32 32

Combining the above with the pay table, you can calculate the following table:

Code:

Win Payout Combinations Probability Return
b3-b2-b1 500 1 3.0517578125E-05 0.0152587890625
b3-b3-b3 45 15 0.00045776367188 0.02059936523438
b2-b2-b2 35 30 0.00091552734375 0.03204345703125
b1-b1-b1 25 80 0.00244140625 0.06103515625
z3-z3-z3 20 90 0.00274658203125 0.054931640625
z2-z2-z2 15 252 0.0076904296875 0.1153564453125
z1-z1-z1 10 441 0.01345825195312 0.13458251953125
b-b-b 6 2114 0.06451416015625 0.3870849609375
z-z-z 1 5553 0.16946411132812 0.16946411132812

If you add up all the Returns, you get the following total return-to-player: 0.9903564453125.

So, as long as the house provides the accurate pay-table and reel-configuration, it is possible to independently calculate the return-to-player for a given slots game. Thus, it would not be possible for the house to deceive the player about the actual return-to-player for their slots games - as long as they provide the reel-configuration and pay-table.

I really do encourage you to look into making your games provably fair. It's good for you (because your players will trust you more), good for your players (because they'll know they weren't cheated), and good for bitcoin (because bitcoin casinos are leading the charge in revolutionizing the online gambling industry).

If you're serious about the 5 BTC, please donate it to the Bitcoin Foundation

Eventhough I was dubbed noob, and I don't take it as an offense as I am really noob with Bitcoin, I do have experience with design of slot machines. However, the problem that you have lies in this:

"So, as long as the house provides the accurate pay-table and reel-configuration, it is possible to independently calculate the return-to-player for a given slots game. Thus, it would not be possible for the house to deceive the player about the actual return-to-player for their slots games - as long as they provide the reel-configuration and pay-table."

Yes, it's up to the house to provide accurate pay-table. Nothing prevents the house from providing an inaccurate one. And that's the big problem and I am sure that's the point that Bitcoplay is trying to say.

I am currently consulting a group of people who are about to enter the Bitcoin gambling market and I have been telling them the same. Provably fair is not a panacea. You know that you artificially streched it to the slots. For card games where a deck is involved it works just fine but not for video slots. It's not something to trust a-priory. So, I think BitcoPlay guys (though I think those are more Playborne guys because they're the creators of the game) are right. It's possible to make a slot game that is provably fair and can still deceive.