The games coding impresses me, but not nearly as much as the creativity of some of the loops. Some I was aware of but this is wild. 🤣

Konami has had multiple video games to learn the bullshit us players can pull off, not to mention all the degenerates in the tournaments.

Damn, Konami was incredibly thorough when they programmed this game. I'm genuinely impressed.

This doesn't feel like a memory leak. It feels like there's something that counts how long it's been since an open game state and goes "okay you've activated 200 (or whatever) cards since the last open game state, that's not a thing that's supposed to happen, you lose now" that's there as a fail safe to prevent stuff they couldn't think of from looping forever.

In this Series both twitch chat and myself will digging for infinite loops testing the limits of Master Duel rullings programation. We will use mandatory effects and gimmick scenarios, and see how to the game deals with them. HOWEVER in each episode well try another loop of the next interaction that was released, not moving in Chronological order. This is the Master Duel destruction series.

Dire is becoming my favorite character in this series

You would make a good stress tester for different Yu-Gi-Oh games

Konami Intern: "Bro, please just stop. Come on"

That had to be intentional. It causing a connection error after x amount of loops. That way people get punished for causing them. Or maybe it is a memory problem. There was someone who tried to fusion summon using 100+ monsters and as soon as it hit the field the guy was forced into the same connection error. Either way it’s pretty impressive Konami programmed the game the way they did. That being said, the only true infinite loop I got myself in wasn’t even my fault. I was doing a solo duel in the World Chalice story and the AI was put into an infinite loop because it could not decide whether or not to tribute its own monster. It would flash one of the cards like it’s about to use it as tribute or link material and then it cancels that action. And the AI was so confused that it would repeat that infinitely. And since there’s no timer on Solo duels I had no choice but to hit Surrender and try again.

coder is a mad scientist trying to create a superweapon but it keeps exploding in his face haha

game: prevent infinite loops twitch chat: unplayable

Connection failed definitely seems like a last resort type of thing. If it was a memory leak the game would slow down, but also I don't think it gets even close to matching the memory you'd use in an average higher level game. There's simply not enough happening to use up that much memory, specially in a streamer's computer. I'm too lazy to check but I wonder what the total activations (Morphing, All out and Deep seated combined) were in both instances of the test. So far we've seen it immediately kill an automatic no chain loop with skill drain, and cap activations and chain links at 10 and 16 respectively, so this test seems like a definite outlier just outright killing the match.

Konami: "Banning you? No, I'm sentencing you to THE JAR."

Coder: "Let's make a loo-" Konami: "DID I ASK? NOO!"

More than likely the game has a fail safe for infinites where if the same action leads to the same result which incurs the same action, it disconnects. Just in case they overlooked something

The game likely has a timer that runs on the background when the player timer is not running and that gets reset every time your player timer goes down, so what's probably happening here is that the game uses that timer as a failsafe with something like "If (failSafeTimer > 5 minutes) {make the current player discconect}". This is probably why the first time you died after 11 activations and the second one after more activations, the pot likely took less reveals to trigger on the first couple of activations or you had less cards in deck to begin with, so that resulted in more activations happening in the same timeframe.

Appreciate the "Three of them thangss"

Unironically, giving you and other people “admin” accounts that simply have access to the pool of cards to test shit like this would be super beneficial for the long term MD

Konami: Players, here is Master Duel. An official Yu-Gi-Oh! Duel Simulator by First Party Company. Have fun and enjoy! Coder: Let's break this sumbitch!

Coder is really out there bug testing the crap out of this game basically for free.

Your content is great bro. Is fun watching you figure this stuff out with chat.

Konami probably is using DFS loop detection, which would explain how they can stop all types of loops without hard coding them, and why there is an anti memory leak failsafe that causes a connection issue, since DFS loop detection takes up a lot of memory

*An Explanation on What's Happening Here:* If this was a Memory Leak (Meaning Data not being released from RAM when it should be, not running out of RAM) then it would crash the entire Master Duel Program instead of Disconnecting the Player from the Duel. What seems more likely is that there is a limit to the amount of actions that the server can recieve from a Player's Client, by having an infinite quantity of actions to fulfill it would respond with a Disconnect to prevent errors. Maliscious Players are already abusing this interaction by sending Packet Data to the Servers that gets them instantly Disconnected from a Duel and it will not appear in Match History because the Duel never finalised so there was never a Winner. Of course, I don't have access to the Source Code and I'm not a Master Duel Dev so this is all complete theory - but the required Online Connection heavily suggests that the Servers are responsible for processing the interactions in a Duel and considering sending Packet Data was used to force Opponents to Surrender it reinforces that Master Duel's Servers are the ones doing any Disconnecting.

I'm glad Konami caught all of these, imagine having to scoop after watching a loop for twenty minutes that does absolutely nothing.

Considering how well coded this game is, just remember the game was rumored to be released at around 2020 or late 2019 which is the height of the pandemic. But given the amount of financial resources they pulled from Duel Links and the OCG/TCG, they must've hired good programmers and devs, not only that, some suits at Konami HQ probably did their damn best to convince their higher-ups to give the game more time and not announce the release until Oct of 2021. They also probably hired or consulted veteran OCG/TCG players too but keep the meetings confidential.

Something similar happens with overload fusion btw, if you activate it with around 100 target the game just explodes the moment it tries to calculate chimera overdragon's attack. Not really a loop but it is interesting how the game doesn't like you pulling certain things.

Six Sam Players: I want to do my combo 100 times and get plenty of counters. Master Duel: So you have chosen death.

The game normally stops infinite loops by not allowing an action to repeat itself an 11th time. Maybe the disconnect is a backup failsafe just in case the 10 loop limit is somehow bypassed by something like what Coder discovered here.

I love dire, dire adds so much to the videos :)

Yo this was actually entertaining I’m subscribing 😂

When the Jar is no longer Morphing

There's a clause in the official rules that infinite loops with no net value do not resolve like the Pole Position issue. Realistically All Out Attacks would destroy itself once it reached an infinite loop

very impressed with the coding effort here. Loop detection is actually a difficult problem to solve.

I think the devs develop some cut-downs if the player attempts to play an infinite loop algorithm and tries to destroy the game, then it must be detected by a certain amount of repeated effects, and resolutions. Another thing here is that maybe someone from the devs overlooks the loop matches so that they could cut down the match.

I assume what happened there at the end was that the game recognised that you had only swords of deep seated and morphing jars in the deck and forced a loss upon you. The reason the amount of times morphing jar was different every time is because the amount of times morphing jar had to activate to only leave the swords and itself in the deck was random.

There is the possibility that the game is coded to empty it's memory in a way that works off of different actions that were taken, which for example would explain why it makes multiple chains to resolve 17+ mandatory effects. But as you resolve the same couple of actions over and over with this loop the game might not empty it's memory as there are still actions resolving, causing either the connection to fail to prevent a stream of overlapping data your opponents machine might not be able to handle. Or it might just do that as a smoke screen, basically just lying to you to condition you to not use those decks as the game engine might have no way to correctly handle those, admittetly extremely rare, cases of unstoppable loops.

Of course it knows about the Morphing Jar 2 loop, there's enough banned cards due to a looping FTK outside of the cards that themselves loop, they're going to account for it.

So in this case it is probably memory related. But so far I am impressed how many stress testing this game had to go to be green lighted at all. It didn't really break or showed an error message or closed on itself even once yet

The interesting thing here is that All-Out Attacks should have been destroyed by game mechanics, yet it wasn't. Though technically the game state could be different with each chain, since it varies how many Sword of Deep Seated there are in the deck/GY when the next part of the loop starts.

What if you play outstanding dog maron and prohibition on it? Would it go to gy and then back to deck since it can't be summoned because of prohibition. Or not activate at all?

Its fair to say the developers built this game to not fall prey to loops like this

Haha, you know, I think it says something about the game that pretty much all of these loops involve old cards..lol, it really was a wild time back then.

NEVERMIND I LIED- shows “Dark honest”

But, does manticore of darkness loop work on MD? I wanna know, because you could deck people if you get Maxx cd

Is there any point with testing this loop with a card which advances game state when flipped? Either inflicting damage, or drawing cards.

Poor Dire. Hang in there!

Konami like, "You can't shuffle Morphing Jar #2 into the deck if you don't have a deck" Also I might imagine that Konami has something that says, "If you use the same card effect like 15 times in a single turn then it's most likely an infinite loop" and gives you an auto-loss. Infertnity players on Xyz Festival Watch. If you want to do more testing you should have the opponent run Dark Designator so they can search the required pieces for you.

My theory is that it reads the timer isn’t going down for a set period of time and disconnects you based on that.

Seems unlikely to be a memory leak directly causing the disconnect, that would look more like the game slowing down until it crashes, but forcing a disconnect *could* be an anti-memory leak failsafe if this is actually making the game take up more memory over time. I think more likely though it's unrelated to memory issues and instead it's some other sort of failsafe that forces a disconnect to prevent neverending duels.

What if you set 2 jar #2 or 1 jar and a flip monster that gives lp Or jar and magical merchant with the sword Or the jar and a flip that gives lp with the moon mirror so you have to pay and interact with the loop?

This game is too damn smart, it’s ridiculous Also the Connection Failed message reminds me of what happened to someone who tried fusing over 100 monsters into one fusion (chimeratech over dragon I believe) so I think it is a memory thing, like it’s too much information to process

If you could find a way to auto send outstanding dog marron to the grave inside of this loop it should in theory keep going because it's effect will auto put it back into the deck

i use morphing jar 2 combo with flip monsters as princess of tsurugi and des koala, along with buvonic vermin and gravekeeper's scout to swarm the field

Would it still stop if there's something that gives you effects for every summon/destruction?

Maybe the "connection failed" error happened because there's a check to count how many cards effects happened since the last time a player played a card and, once it hits a certain number, assumes it's an infinite loop and ends the duel.

Damn man they knew about morphing jar#2 holy shit

So now I'm curious on this question (hopefully you might try it out) will it stop you if you do the avian and thunderbird combo?

Master Duel Loops is my new favorite segment 😂

what I beleive it happens, all your cards in deck have ID attached to it the game checks your stats at every chain start and end if nothing changes ( hand, field, grave, banish, extra, lifepoints ) or you keep "shuffling" your deck they force an end to it after a limit is exceeded

Why is this so entertaining

One of the things I notice when you did it with the D hero, the same activation of a card will stop or in this case...cause it to forfit the players control. So as long as another card involve in a chain...it could possibly carry on. I play jar #2 but not in the same phases. XD;;

It can’t result in no game state because then all-out attack is stopped. If you had hiro’s shadow scout then it continues the loop

Have to test it on solo mode to see if it bypass connection checks

These are amazing. Wow.

New meta: Eldlich strikers + morphing jar 🤩

What happens if you do this same combo, only one Morphing Jar, no sword of deep seated, but you reach the “limit” but your opponent can still resolve morphing jar #2, will it not activate because YOU can’t resolve it anymore despite the fact your opponent can still have a changed gamestate? Or will it continue until BOTH players can’t resolve it?

Is there a way to actually win with this using a burn on summon card?

Back in the day. When MRL first came out, I dueled against one of my friends at locals and we got stuck in a morphing jar #2 sword of deep seated loop. Mj2 resolves then the sword goes on top. We didn't know back then. 😂

Would they have data set on each individual jar so that after 10 activations on one it crashes.

Hey, Coder. If you're planning on stress testing the game, I just saw a video where a person made a Chimeratech Overdragon using over 100 materials and the duel crashed like in this loop. It'd be cool to see how many materials can go into a single fusion before the game dies.

Whoever said it was a memory leak is 100% wrong lol. This is probably a check with in the mandatory effects resolving. If the same cards are causing an infinite loop then it might just disconnect you as like a final fail safe. Eg it looked ahead and it saw that morphing jar #2 and the equip spell creating the same exact chain more than X times so it made you quit. Try this with like 4-5 different cards to confirm.

I’m curious to know how long the six samurai loop can last?

I hecking love watching loops please don't start uploading different things because I want to see 10 more loops

Now if there was a win-con in the deck that related to you milling spells to burn the opponent ibwonder if the loop would be forced stop considering there would be an end goal eventually

The effect doesn't activate because it says put it at your top of your deck but since u have no deck it doesnt activate

should try it with an opponents monster

You could try to use YGOMaster to try the Pole Position loop

That is incredible. Absolutely the craziest shit is possible in this game 🤣

i have an atack loop i realy need to test coder would ya be willing to elp

The only explanation is that Konami watches Coder’s stream and is like “nahh bro u not breaking my game”

The first one is simple if player has 0 cards in deck don't resolve jar The last loop is deffinatally not a memory leak as there is no way you're using enough memory and even if it was thats not how it would manifest. If I were to guess the game checks how many times jar has resolved targeting itself or while x gy condition is met and shuts the lobby down but idk

[Theory] It isn't a memory leak, if was a mem leak something else would have broken, you could even get windows to crash if was it. The thing that makes more sense to me it is a timer (proprably server sided), before the final loop atempt you activeted the Sword more then 6 times, which makes the chain longer, wasting more time, on the final atempt you actived only 4-5 sword, because of that you got more activations of Jar because your wasted less time. If my theory is right, if you can quickly send all the filler cards to the grave, leaving only 1 Sword and 1 Jar (maybe 2 for safety), you can waste less time, making the loop longer, of course once the timer ends you will get dced, but in a online duel you opp proprably gonna scoop before the timer ends.

IIRC I believe this also happens in LOD: LE. To clarify: it stops if there are no cards currently in your deck. (edit) I made this comment before your second test. But I do remember something similar happening in LOD: LE. I didn't bother doing further testing after I saw that the combo ends for reasons(???). I was also using it in conjunction with Needle Worm. The combo would end before my opponent would get decked out.

i wonder if your opponent has something like outstanding dog maron in their deck and you also put needle worm in this combo if that loops infinitely or if it also breakes when your opponents cards move or maybe your opponent is the one who times out.

@DistantCoder toons can actually cause the game to lock itself, if you have toon black luster and 1 other toon monster in hand that is lv7 or lower, the game will let you activate toon bls effect to special and then when it tells you to tribute it will give you option to select other monster but won't actually let you select, the game then gets stuck in that moment, only way out is to surrender

Probably when your timer doesnt go lower for a determined amount of time the game just disconnects you

The card text says "shuffle into the deck". That's can't happen of you have no deck, right?

Grass is greenest.

Is it possible to do it in the battle phase? I don’t know why but for some reason I think doing it in the battle phase makes it infinite.

Konami* Goddammit he's at it again!!

Can you do the gateway of the six to see how much counter it will be max ? :))) love to see that

you should do Bagooska and the continuous spell that's in Yang Zing

Long video had to x2 speed the video , but wow such a great a video

... Yeah. I ran a deck that worked off the combo, with a hiro's shadow scout and three copies of MJ2. The idea was mill yourself down to your three MJ2s and 1 HSS, and having two monsters on the field.

I think the AI confuses the Loop with a error of performance thus forcing an end to the connection the same way you shut the power of your console when the console freezes.

A memory leak is highly unlikely, you would activate jar at least 100 time before any crash, that is IF there is any leak in the code

Yo idea what if u did this but to mill a crap ton of spell cards into the grace so u can activate magical explosion trap to inflict 300 damage for each spell in grace so in theory even if only 30 spells are sent that’s still 9k damage for a 1st turn ko

Can we get some love for Dire doing all this work

Clearly the play is to have both players set up morphing jar #2 and have the game explode.

how about michion timelord?? how many halved points can be????