Question 1

What is a Jolly Card in Yu-Gi-Oh probability?

Accepted Answer

A Jolly Card is a versatile card that can fulfill more than one role in your deck (e.g., both Starter and Extender). Instead of forcing it into one category, you mark it as Jolly and assign it to multiple categories. The calculator then considers it can fill whichever role is needed, giving you more accurate probability results.

Question 2

How does the hypergeometric calculator work for Yu-Gi-Oh?

Accepted Answer

The calculator uses the multivariate hypergeometric distribution to compute the exact probability of drawing specific card combinations in your opening hand. You define your deck size, hand size, and card categories with min/max constraints. The tool enumerates all valid draw configurations and sums their probabilities.

Question 3

What is the probability of drawing a specific card in Yu-Gi-Oh?

Accepted Answer

For a 40-card deck drawing 5 cards, the probability of drawing at least 1 copy of a card you run 3 copies of is approximately 33.76%. Use this calculator to find exact probabilities for any deck configuration.

Question 4

Can I import my Yu-Gi-Oh! deck from EDOPro or YGOPRODeck?

Accepted Answer

Yes. Paste a YDKE URL, the YDK text, or upload a .ydk file. The builder fetches card names and images from YGOPRODeck, separates Main, Extra and Side Deck automatically, and classifies common handtraps (Ash Blossom, Maxx C, Effect Veiler, Nibiru, Imperm, Droll, and more) into their own category.

Question 5

Does the deck builder manage Extra Deck and Side Deck?

Accepted Answer

Yes. The tool manages the full deck: Main, Extra and Side. Each section has its own card search via the YGOPRODeck API and a 15-slot visualization. YDK and YDKE exports include all three sections, ready to load in EDOPro or YGOPRODeck Deck Builder.

Question 6

How does automatic handtrap detection work?

Accepted Answer

On import, the builder checks each Main Deck card against a curated list of popular handtrap passcodes (Ash Blossom & Joyous Spring, Maxx "C", Effect Veiler, Nibiru, Infinite Impermanence, Droll & Lock Bird, Ghost Belle, Ghost Ogre, D.D. Crow, Skull Meister, PSY-Framegear Gamma, Dimension Shifter, Bystials, Mulcharmies and more) and places them in a dedicated Handtraps category so the probability calculation reflects the real role mix.