Level by Level
Your odds for every declaration
From 1 to 12, the calculator gives the chance a monster is Summoned, and spots the Level your opponent should declare.
Free tool
Reasoning Calculator
Import your decklist, pick the Level your opponent declares, and see your odds of Reasoning Summoning a monster — and which one.
Import your deck
Import a decklist, pick the Level your opponent declares, and see how Reasoning resolves.
Why use this tool?
Your decklist
The monster you will get
Every Normal Summonable monster in your deck is shown with its odds of being the one Reasoning Summons.
Graveyard
The cards sent to the GY
How many cards the excavation sends to the GY on average: useful for decks that benefit from it.
What does Reasoning do in Yu-Gi-Oh!?
Reasoning is a Normal Trap. Your opponent declares a monster Level from 1 to 12, then you excavate cards from the top of your Deck until you excavate a monster that can be Normal Summoned/Set.
If that monster is the declared Level, all excavated cards are sent to the GY. If not, you Special Summon that monster, and the other excavated cards go to the GY.
It all comes down to the Level spread of your deck: the more one Level dominates, the likelier your opponent is to declare it. The calculator puts a number on that risk for your Yu-Gi-Oh! Deck.
The rules the tool applies
- Normal Summonable monsters : Ritual Monsters and monsters that "Cannot be Normal Summoned/Set" are skipped by the excavation and sent to the GY. A Level 5 or higher monster counts, even with no Tribute available.
- The first monster decides : Since the Deck is shuffled, each Summonable monster left in the Deck has the same chance of being excavated first: the odds follow the number of copies directly.
- Opening hand removed : The calculation uses the Deck left after your opening hand (5 cards going 1st, 6 going 2nd), Reasoning included. Other searches and draws are not counted.
- No monster left : If no Summonable monster is left in the Deck, the whole Deck is excavated and sent to the GY, with no Summon.
How to use the tool
- 1. Import your deck : Paste a YDKE code or pick a saved deck.
- 2. Pick the declared Level : By default, the calculator selects the most played Level in your deck, the one your opponent should declare.
- 3. Read the resolution : Chance of Summoning a monster, which monster you get, cards sent to the GY, and a comparison of all 12 Levels.
FAQ
Reasoning FAQ
The most represented Level among the Normal Summonable monsters of your deck: it is the most likely to be excavated first. The calculator flags it in red.
Yes. A Level 5 or higher monster can be Normal Summoned with Tributes: Reasoning stops on it and Special Summons it with no Tribute.
It does not count: the excavation goes on, and it is sent to the GY with the other excavated cards.
On average, very little: drawn monsters leave the Deck at random, without favoring a Level. The main risk is running out of Summonable monsters in the Deck, which the calculator accounts for.
Other available tools
In the same category: Duel helpers
Build a deck where Reasoning always hits
Free, no sign-up — open the deckbuilder and adjust your copy counts accordingly.
