Yu-Gi-Oh! has been in print since 1999 and the rulebook has grown with it. A duel is still built on a frame that fits in a paragraph: two players, 8,000 Life Points each, a deck built before the first card is drawn, and a turn that runs through the same six phases every time. Everything else on this site assumes that frame, so it is the place to start.
Quick answer
A duel uses a Main Deck of 40 to 60 cards, an Extra Deck of up to 15 and a Side Deck of up to 15. Both players begin at 8,000 Life Points and draw five cards. Each turn runs through the Draw, Standby, Main 1, Battle, Main 2 and End phases in that order. A player loses when their Life Points reach zero, when they must draw and the deck is empty, or when a card says they have won by some other condition.
The deck, in three parts
The Main Deck holds 40 to 60 cards and is the one you draw from. It is where monsters, Spells and Traps live, and it is the only part of the deck with a minimum. The Extra Deck holds up to 15 cards and is kept face-down to one side: it is where Fusion, Synchro, Xyz and Link monsters wait until a card tells you to summon them. The Side Deck holds up to 15 cards kept outside the duel and swapped in between games of a match.
Pendulum monsters are the odd case. They sit in the Main Deck like any other monster, but they can also be placed in the Pendulum Zones on the field, where they act as scales and let you summon a whole group of monsters at once.
The field
Each player has five Main Monster Zones and five Spell & Trap Zones, plus two Extra Monster Zones shared between the players and a Field Spell Zone. Alongside those sit three places cards leave play for: the Graveyard, the banished pile, and the Extra Deck itself. Cards use the zones by name — an effect that says “one of your Monster Zones” means exactly that zone and no other.
The six phases of a turn
Draw Phase: draw one card. Standby Phase: effects that trigger “in the Standby Phase” resolve here. Main Phase 1: summon, set, play Spells and Traps, and use effects. Battle Phase: declare attacks. Main Phase 2: a second Main Phase, used after attacking. End Phase: the turn ends and hand-size limits apply.
The two Main Phases exist because attacking ends the first one. If a deck needs to set a Trap after it has attacked, or summon a monster that only works once the board is settled, the second Main Phase is where that happens.
How a duel ends
Most duels end when one player’s Life Points reach zero. The other two ways are running out of deck (a player who must draw from an empty deck loses) and a card with a printed win condition. Because a deck can lose without being attacked, a duel is not only a race — it is a race against the clock the deck imposes on itself.
Frequently asked questions
How many cards are in a Yu-Gi-Oh! deck?
The Main Deck holds 40 to 60 cards, the Extra Deck up to 15 and the Side Deck up to 15. Only the Main Deck has both a minimum and a maximum.
How many Life Points do you start with?
8,000 each. Both players draw five cards before the first turn.
What is the Extra Deck for?
It holds Fusion, Synchro, Xyz and Link monsters, kept face-down until a card lets you summon one. It never goes into the Main Deck.
Can you win without attacking?
Yes. A player who must draw from an empty deck loses, and some cards print their own win condition, so a duel can end with the Life Points untouched.
Do you need the newest cards to play?
No. The older summoning methods are still legal and still used. What changes between sets is which decks are strong, not whether an old card may be played.
Sources
Sources and further reading
- Konami — the official Yu-Gi-Oh! TRADING CARD GAME rulebook and the For Beginners how-to-play series, which set out deck construction, the summoning methods and the turn structure.
- Konami — the official Deck Construction Rules page, for the Main, Extra and Side Deck limits quoted here.
- CardSpicy — the Yu-Gi-Oh! card index, which lists the printings we hold and links to the rest of the Yu-Gi-Oh! guides.
Game rules, product contents and card counts are quoted from the publisher’s own materials at the date stated and can change without notice. Prices quoted anywhere on this site are secondary-market observations and move quickly; nothing here is a valuation or an investment recommendation. Our own asking prices for the cards we hold are on each product page.
Where to go next
- The CardSpicy card index — every card we track, with its PSA 10 population and market history (195 cards).
- The illustrator index — every artist behind those cards, card by card (110 artists).
Leave a Reply