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To have the upper-hand (also known as hold sway or dominance, govern, control and dominateer) is to have the power to make decisions. This is an essential part of poker strategy. The best way to gain the upper hand is with marked cards, which can help you win the game more often than your opponents. There are several ways to mark a deck of playing cards, but the most common is with invisible ink. This type of marking can only be seen with poker perspective lenses or glasses. These glasses are available on the internet, but you can also buy them in some magician shops.
Another way to mark a deck of cards is with barcode marked cards, which are also invisible to naked eyes but can be read by a poker analyzer. This card reading device will report the winning seat even if cards are spread in the middle. This device can be bought online or in a casino. However, it is important to know that cheating with poker analyzers is illegal in some countries.
Marked cards are a great way to improve your poker and magic performances, but they must be compatible with the cards that you are using. Online and in some magician shops, you can purchase poker analyzers or external scanning cameras. These devices are highly scalable, and can be used with a variety of accessories to expand their capabilities. They can also be hidden in various daily items, including watches, bracelets, T-shirts, car keys, and power banks.