RNG - Shuffling Avoids Clumps - Easily Replicated

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J01
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RNG - Shuffling Avoids Clumps - Easily Replicated

Post #1 by J01 » Tue Jun 15, 2021 5:52 pm

The deck shuffler seems to avoid the same card being next to each other in the deck order.

This can be easily replicated by creating a 6 card deck with 3 copies of 2 cards and hosting a custom duel and resetting the deck order. Doing this I shuffled the deck 80 times and monitored whether the deck came out with cards next to each other or went alternately.

The cards went alternately (ABABAB or BABABA) 60/80 trials (75%), however, the odds of either ABABAB or BABABA coming up in a single trial should only be 10% ((6/6 )*(3/5 )* (2/4) *(2/3) * (1/2) * (1/1))

So you can understand what I'm talking about here is a video clip of the first few trials:
https://imgur.com/a/TgSFQDW

eyal282
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Joined: Wed Sep 23, 2020 6:02 pm
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Location: Dustshoot Phase

Post #2 by eyal282 » Thu Sep 22, 2022 11:44 pm

J01 wrote:The deck shuffler seems to avoid the same card being next to each other in the deck order.

This can be easily replicated by creating a 6 card deck with 3 copies of 2 cards and hosting a custom duel and resetting the deck order. Doing this I shuffled the deck 80 times and monitored whether the deck came out with cards next to each other or went alternately.

The cards went alternately (ABABAB or BABABA) 60/80 trials (75%), however, the odds of either ABABAB or BABABA coming up in a single trial should only be 10% ((6/6 )*(3/5 )* (2/4) *(2/3) * (1/2) * (1/1))

So you can understand what I'm talking about here is a video clip of the first few trials:
https://imgur.com/a/TgSFQDW


I wonder if this issue still exists, or if it matters for a 40 card deck.


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