I wish the thread would stay on track - I'm find it intriguing that the shaved corners from wear and tear could lead to a bias (as it would role away from the number of which corner it's on and thus towards the number on the opposite side). More info about this plz, and less about the OBVIOUS JOKE REFERRING TO THE CHINESE PRESHUFFLED CARDS ZENKING CLAIMS. Thanks.
It's hard to tell because of all the scratches on the glass, but there is no crack in the felt. You're seeing a reflection of the line in the plastic that is outside of the glass. The die was sitting on its corner, in the same position, for several minutes. While waiting for someone to reset the machine, one player gave his terminal a shove, which made the die visibly wobble a bit but it still didn't fall of its corner. Honestly it was the among the weirdest things I have ever seen in a casino.
You can see the same effect when the interior lights are off (before the roll) in this video. It looks like there's a crack, but when the lights turn on, you can see that there isn't one.
And to put this thread back on topic, It looks like it got stuck in the crack. I'd find it hard to believe you'd be able to exploit this without recording millions of rolls. And even then, it would require millions upon millions to manifest the minuscule +EV resulting from this.
Eh, more like 10,000-20,000... similar to a roulette wheel.Quote: cwazy
Again, there’s no crack in the platform. It just looks that way because of the reflection. If the lights had been on inside, it would be more clear.
And no, it doesn’t take millions of rolls to detect bias.
Eh, more like 10,000-20,000... similar to a roulette wheel.
What's really surprising about this photo and story is that a technician had to come to reset the dice. Why couldn't the machine make that determination itself? Surely the cameras that detect the result could also detect this unique situation and declare a 'no roll', and start the vibration thing again. Only if there are two 'corner' results in a row should the machine contact a technician.
Wizard once did a Chi Square analysis to prove that a certain online casino was cheating. If I remember correctly, it was on Craps, and after something like 300 rolls he determined that the odds of those results being naturally occurring were astronomically high - hundreds of millions or billions to one. So it may take less than 10k rolls depending on your technique. I’ll have to look back and see if I can find the article.
For the physicists/math guys out there, the pictures below were taken last night on a Shoot To Win Craps machine. You might not be able to tell, but neither die is touching the other. The die sat in this position, propped on its corner, for several minutes until they came to reset the machine. Is this physically possible without the die being warped in some way?