Is the AI designed to set monsters? I've had it do that a couple of times recently, toward the end of the game, I would MST the back row before attacking for the game and it would destroy a monster.

What do you mean? It sets monsters as spells? This is only possible for some monsters, for example the "Artifact" archetype. I might be misunderstanding your question, though.

No, I mean exactly what you're thinking. I was playing against the Darkworld deck the other day, for example, and towards the end of the game, it had one card set in the back row. I MSTd it and it was Grapha.

So i just decided to have a fun game against the exodia bot, it was going slow for awhile and then it hit it's stride, unfortunately when it only had one card left in the deck it decided to discard pieces of exodia.. xD

I was using the exodia.lib ai with the exodia.lib lua.

I was surprised that it would discard at a piece at all.

Well, if it doesn't work for you, it seems to be an issue :)


I cannot seem to reproduce the issue on my end. You mean all summons from the extra deck do not work? For all decks? Fusions, Synchro, XYZ, Pendulum... did you test all of them? What exactly happens, if the AI attempts to summon from the extra, and what indicates, that it is about to do the summon? Can you provide a screenshot of the error?

Did you experience any bugs or error messages not listed here? Can you provide information about an issue currently under investigation? Or do you still experience an issue, that should be fixed already? Feel free to post it here, or in a new thread.

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When I duel the AI while it's using a U.A deck I made, it simply does everything it can. It keeps on special summoning monsters until it reaches the worst one, even though it could have done it once for that single monster (for those unaware, most U.A monsters have the affect where you can replace the monster on the field with one in your hand).

I've been going against the AI for a while now and am curious if the first person to go NOT DRAWING is a bug or if it's normal. There have been many times where I encountered this in the latest version.

As of July 14, 2014 for the TCG, the player who goes first does not conduct their normal draw during their Draw Phase, similar to how they cannot conduct their Battle Phase either.[1]

Really loving this program and I'm amazed at how well the AI was designed! I have used it to test decks I've built and typically don't run into any issues doing this, so finding an issue with my Necross/Exodius deck was surprising to me.
Not sure if this is because the AI is meant to exclusively play with the decks marked "AI" (actually, now that I think about it that seems likely...) or if it's just an oversight, but when I tried to test out my Exodius/Necros/Lightsworn deck with the AI, it never plays low level Lightsworn monsters. Not even if its lifepoints are in the triple digits and it has the opportunity to defend with them
But the weirdest part (as shown in the video below) was that even if it had Exodius the Ultimate Forbidden Lord in its hand, it would surrender almost immediately after any piece of Exodia leaves.
The reason seems obvious to me that the game was basically programed to think that since the five pieces of exodia are in the deck then it must aim for an Exodia win.
Would it be possible to program the AI to aim for wins with Necros or Exodius?

The Exodia script is a little different compared to the usual AI decks, as in it skips the default AI logic entirely. So currently, it is pretty much impossible to make an alternative deck for Exodia. I can probably make the detection for the AI Exodia deck a little more specific, so other decks won't be detected as an Exodia deck as lightly.

You can probably do that yourself. Navigate to "(ygopro installation directory)/ai/mod" and open the file "AiOnDeckSelect.lua" in a text editor. Find the line 28:
"DECK_EXODIA = NewDeck("Exodia" {33396948,70791313}) -- Exodia the Forbidden One, Royal Magical Library".

In this line, you can add any number of cards by their ID inbetween the {}, separated by comma. Add any card, that is used by the AI Exodia deck, but not by your own deck. This should cause default AI logic to take over for your own deck.

It might still not be handled very well. But it shouldn't surrender anymore.

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