Unmarkable cards

There is a popular high-stakes card game. Unfortunately, for whatever reason, it's impossible to get out a new pack of cards for each round. The same cards must be used throughout.

This game would of course be ruined if marking cards were possible, so how can we make it so it's impossible?

Each 'card' must fulfill all of the following conditions:

• Each card is slim (not much more than twice as thick as a standard playing card)
• Each card is stackable
• Any marks that can feasibly be made by players unobtrusively during the game without special equipment have to be so unsubtle that the dealer can pick them out
• There are markings on the card that designate what is is (J, 2, A, etc.), that are easily and unambiguously deciphered (not something along the lines of morse code, notches, etc.)
• They all have identical backing.

Cost is no issue, in fact if it costs somewhere between a 10-pack of beer and a very cheap car to make one set, all the better.

posted about 6 years ago

Piomicron‭

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