Can You Escape The Goblin? [Math Puzzle]
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- Опубликовано: 7 окт 2017
- This was a fun puzzle that I ended up making a game for to help me solve it.
GitHub: github.com/HackerPoet/GoblinE...
Blog Post: datagenetics.com/blog/october1...
Music Credits:
"Graveyard Shift" Kevin MacLeod (incompetech.com)
"Cool Vibes" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
creativecommons.org/licenses/b... 
Наука
"You find yourself in the middle of a circular lake"
I like how math problems are often worded like overanalytic dramas.
*A rectangular Goblin draws near*
*A triangular Dorito goes into your mouth*
You find yourself in a circular lake, you look to the shore and you see him!
-shia labeouf-
@@sorenmine7765 quiet quiet
Well real life problems don't differ much anyways. You just have to find a way to relate a problem with your math skills ( just like your related rates chapter in calculus 1 )
Ban a goblin for speed hacking.
Yeah
Forever.
he scammed me out of my Golden Pants. God thing hes banned
Also,ban him for "ideal walk". He can just fall.
Xxgobl1nxX banned for "gotta going too fast"
"You find yourself in the middle of the lake" How the hell I got amnesia all of a sudden and my friend abandoned me thinking it's a cool prank?
Yeah, my DnD's DM use this as a start
Your friend is the goblin, he’s trying to invite you to a party but you don’t wanna talk because you’re skinny dipping. Get the hell outta the pool before he notices your beans and franks
@@PanjaRoseGold ( ͡° ͜ʖ ͡°) why won't you talk with him? ;)
@@dawidek4267 The goblin's brain would short-circuit, causing them to die. The regions which the swimmer wouldn't want the goblin to see are non-existent in the goblin's world and basically inconceivable.
@@sadpizza1786 *i want the goblin to see my inconceivable regions **_( ͡° ͜ʖ ͡°)_*
"Yay! I have escaped!"
The goblin literally breathing in his neck: "Guess you have."
👹👹👹👺👺👺
SLAY THE GOBLIN WHEN YOU GET ON LAND WITH THE EXP YOU'VE EARNED KILLING CROCODILES IN THE LAKE
Just put on your skis and ski away :D
grind attack exp by throwing rocks at the goblin then kill it after you get a high enough attack level
You have to start by killing fish though, crocodiles are too high level until you kill a few fish.
No you start by killing seaweed
Hey hey..
Goblin slayer
But that's a yeti
That's what the goblin wants you to believe
I don't understand why out of ALL the available goblin related material or sprites from other video games, why the yeti made more sense.
Maybe the problem originally had a yeti instead of a goblin and was changed halfway through, but the video was already done.
hey man. do you know what the game was called ? where the yeti comes out
@@end-quoteSkifree
@@plagueist0047 thanks man :)
You can't. The goblin ends up seeing you, beyond the idea he trapped in. He's digging his way into our reality. He hungers.
This is terrifying
@@jetison333
Just give him some chicken nuggets man
We are faster on land
@@hanstineyang7902 but for how long?
@@jetison333 idk goblin i know is either larger than human very slow and the small one very weak
There is my solution from a programmer's point of view:
Look directly at the goblin, turn exactly 180 degrees and swim fowards in a perfect straight line.
The goblin is now stuck at NaN position
Actually it has completely sense. The goblin would stay still until u don't pick up a side, so if u go perfectly straight the goblin will be always idle.
That's an interesting take
Shouldn't the goblin be programmed to travel to the point on the shore nearest to you? If so, this strategy wouldn't work anymore.
@@fliermcduck But the goblin would be always uncertain if to go right or left (yes, actually it depends how the program is written)
@@squidprince2456 If the goblin were directional, then it would be stuck, and if I coded him that way, I would probably forget to include a failsafe. 😅
thanks, ill take this video into account next time in stranded in a circular lake with a goblin on the shore.
Now we've got to watch out for gobils too?
@@noice__ these dang gobils are sneaking across the border
Make the lake great again!
#MALA
Once again math has saved my life!
I blame global warming.
Back in my day this was a ski resort.
LOL!!! X^D
_Best comment_ I've seen about the yeti sprite yet! X^D
criminally underrated comment tbh
Lol.....
😬
Fucking boomers ruining everything
Goblin, when you get on shore: *snaps finger* Oh Maaaaan!
Underrated
Yeti, no yeeting?
@@captianwaffle2766 😂😂😂
Bruh your pfp is a gnome form gravity falls
To be fair the goblin 4 times faster than you on the most basic setting, meaning that from scientific data on average human swimming speed being 2 mph, that the goblin at the lowest setting is going 8 mph. On average people can run 5.9 miles per hour (for 20 and 40 year olds) if they’re not in shape. So even if you make to the shore the goblin will still catch and eat you as it’s significantly faster meaning you’re eaten anyway. But let’s per say look at what a goblin actually looks like. It’s usually depicted as small and scrawny tricksters using cunning and devious devious to get their way. Let’s per say for how the game works is that if you’re too slow getting out of the water you get shanked by the goblin and eaten but if you’re quick enough to get out of the water you can fend the goblin off. That’s the only way that the game would make sense in this context if you get to the shore before the goblin reaches your location. Just if you wanted to know.
Goblin: I fear no man but that thing,
*Circling*
Goblin: It scares me
What the heck! This puzzle is mathematically identical to Numberphile's Cat and Mouse puzzle!
ruclips.net/video/vF_-ob9vseM/видео.html
The goblin can't swim, so if you pull him into the water, he would be too busy drowning to eat you.
(I'm assuming the goblin wouldn't reach in and pull you out, but you could reach out and pull him in.)
It my version of the Kobayashi Maru.
@@pattystomper1 Yeah, and your strategy even works no matter his speed.
Maybe he culd just bite ur arm off XD
@@dorisdzanko362 Eh, lose an arm, _keep your vital organs,_ and you don't drown yourself swimming in circles... Sounds like a fair tradeoff to me! X^D
FBI wants to know your location
I like that your videos are never padded. Got 3 minutes of content? 3 minute video. So refreshing.
This. Subscribed.
exactly. someone else would stretch this to the 10 minute mark by first taking their sweet time advertising stuff nobody wants (sponsors/merch) (in all their videos), and then bloating their explanation of everything, over explaining things, and then giving you the simple recap. and talking about their life story a lot.
Omg Cove? You're here ;o you are in KadaL Club right?
@@zykagar lel
I love that the instant you get on land, even if you’re an inch away from the goblin, he just goes “Oh, I guess you beat me, have a nice day” and let’s you leave unharmed.
How to escape the goblin: hold down the "F" key.
I dont get it
@@spacetrainbaby3737 The goblin in the video intro and title is the free-ski yeti, and in free-ski the yeti is meant to be inescapable but if you hold down F you go really fast and escape it.
oh ok
Does this work for gnelfs as well?
I'm gnot a gnoblin
I'm a gnome, and you've been gnomed!
SpaghettiToaster no, they will gnome you
Hoolivey ol’ chum
*You have been gnomed*
or you could go underthewater and swim up to a unexpected part of the lake :)
Goblin has underwater vision and can track your movement
P.S.: Nobody likes a smartass.
@@DarkOmegaMK2 if Goblin has underwater vision i have the power to be invisible , i dont know whos the trying to be the smartass here , me who's just trying to think of alternate solutions for a unrealistic game or you trying to say my answer is "wrong" .
@@pnutdraws You don't have that power...
@@pnutdraws You are the smartass. Not that annoying, but you were being the smartass. :P
@Samuel HIRN In case someone jumps into a perfectly circular lake, obviously.
Funny thing is that I have actually lived through this puzzle. When I was a kid, I was swimming in my aunt’s pool, and then I realized that her massive dog was watching me from the border. Whenever I tried to escape, he got there much faster. I was lost af lol
The title says “Puzzle,” but the thumbnail says “Horror Game.”
The horror of calculus?
Deception
Who else played the Ski game where you had to run from this “Goblin”?
press F
Yes! I was waiting for this comment :,)
Skifree. That one is a relic from gaming's distant past. Before the days of SSX Tricky and even Coolboarders, there was Skifree.
I was looking for a comment like this! That game was awesome!
If you remember that game you deserve a veteran's discount... XD
Victorious player: “I’m out!”
The Goblin: “OUT, AM I?”
That scary SkiFree yeti. Scared the shit out of me when I was a kid.
Just press F and you'll win.
0/10 - not about Skifree
I'd say clickbait, but it was still pretty interesting.
That's why I clicked, has to leave a dislike. Still don't know if it's possible going to google it.
I guess it's actually a yeti not a goblin
Edit: Yeah you can just hold F to beat it :(
Actually, you can just press F once, that toggles the "fast mode". Then, you have to keep going down until the distance meter wraps around to the beginning. The counter begins to count down to 0 after you've reached 2000m. That's also when The Abominable Snowman starts to chase you. He stops chasing you at around -120m. You can go up from the start of the game to find him jumping in one place, but when you go too close he will eat you. Also, you can download a modern version of SkiFree that works on the newest versions of Windows from the official website that you can find here: ski.ihoc.net/
@name2 Yes, if you press the F key and avoid the obstacles.
underrated comment
Just call in Goblin Slayer and let him handle it
crabbyninja just use the gate at the bottom of the lake to send a message
😂
But what if a buch of other goblins appear and rape you?
been loking for this comment :D
No need to call, he'll show up anyway. Just enjoy your swim.
“You’re slow in water”
I’m a competitive swimmer, how fast is that Goblin?
He’s a competitive runner
@@PanjaRoseGold oh I didn’t think about that
Michael Phelps's top speed is around 6 mph, good luck!
Just move back and forth slightly over the center, the goblin will have to run halfway around the pond over and over constantly while you are barely moving. The goblin gets exhausted and faints. You are good to go.
Reality: 1
Math: 0
*Goblin Slayer wants to know your location*
For goblin slayer there is no mathematical problem, once he is outside of the water there would be no more a goblin
“Imagine you are a goblin in the middle of a lake and Goblin Slayer is chasing you on the perimeter of the lake”
@@Abdega Now that is what i call a realistic setting
*Goblin Slayer wants to know the goblin’s location*
The problem will change to " how goblin slayer can catch the running goblin who is 4 times faster than him "
_Title:_ Can You Escape The Goblin?
_Goblin Slayer:_ *_WHAT DO YOU MEAN ESCAPE?_*
Who is he?
@@Dr.Livingdark he slays goblins, it's from an anime
@@Akathysia weeb
@@lazycat9731 he's not a weeb, he's the coffee.
@ *coofee
“You find yourself in the middle of a circular lake”
I don’t remember throwing no enderpearls
Based on the movement rule of the goblin, you could swim in a perfect line away from the goblin and he’d never be able to move one way or another. Theoretically correct.
What?
No, watch the video! He does that, the goblin circles to keep the shortest distance to you.
@@BossBunnyCom I watched the video. I’m saying the goblin is programmed to move in the direction that will put him the closest distance from you. If you start from the center and move in a perfectly straight line away from the goblin, then, technically, the goblin could move either direction as the distance from him to you if he moves left will be the exact same as the distance from him to you if he moves right. The goblin would require an extra rule to break the “tie”. I’m just having fun anyway, not to be taken so seriously..
@@tvrizzle1 If: Talking about the programming of the game = Yes: "Yeah, he didn't explain, but in the game it decides somehow, so that won't work."
ELSE
"Well, a real goblin would just decide 🤣, they're not THAT stupid are they ⁉️
no
I couldn't get this strategy to work manually, but what if you go right next to the centre, and then head directly away from the goblin on a zigzag path so the goblin keeps doubling back on itself, since the shortest path to where you're headed switches very quickly between clockwise to anticlockwise?
Close to the centre this should be easy since small movements from you create big movements in your nearest shore point, it gets harder as you get closer to shore. But maybe once it stops working you're close enough at that point that you can make it...
Edit: Upon closer inspection, the point at which it stops working is the edge of that inner circle. My implementation can escape 3.5 and 4.0, but can't quite get 4.2
Are you the same Robert Miles that did a remix of Simple and Clean?
The goblin is stupid. It does not anticipate where you will swim, it will always get to the closest point to where you are (NOT where you will be)
Oh nice to see you here. I just discovered this channel yesterday as well. (I presume you did too.)
You're intuition is right, you can keep the monster behind you by moving left and right up until the 1/4 mark. Thx you helped me understand the problem. The part your missing is that starting from there you can go straight (perpendicular to the center circle) instead of traveling the shortest distance to the coast. Which allows you to go from a monster at 4.18x to 4.603x (look at the blog post).
@@mirkovodegel3120 if the goblin is at the exact opposite of the lake, you can cause him to prefer to go clockwise or anti-clockwise just by stepping left or right. you can force him to change his mind again and again while still having extra speed to move away until his angular speed is faster then yours (at 1/4 the distance of the center).
and I came expecting a way to permanently deal with the Snowman and was ready to fire up Skifree but a solid solution to a math puzzle is fine as well
Press F
@@federicoreina7732 That doesn't permanently deal with the Snowman.
@@rmeddy :(
I remember playing Ski Free on my dad’s old computer when I was a kid, along with Pipe Dream.
Great video anyways, cheers. ✌️
I thought this video was going to tell me how to escape the yeti on ski free. It gets me every single time
He's not a gnelf. He's not a Gnoblin. He's a gnome and you've been *GNOMED*
Gnoblined
NO!
Even in the comments I'm not safe
Uhuuhu
he is not a gnome, nor a gnoblin ur right
hes a goblin
Why escape the goblin when you could be slaying it?
Or befriend it :)
Because you dont have a sword or any fighting skill whatsoever
Also that anime can summed up in 3 words: sex, violence, dark souls
@@qwargly It's a fucking anime reference, of course you try to escape the goblin. That's the puzzle.
@@ioratv Yeah but im fuckig tired of hearing about goblin slayer
@@filipsperl lol trust me goblins aren't like that
If the goblin is 4x faster that means when you on land, the goblin going to catch you.
But what if you can grab a deadly stick to kill the goblin?
@@databaseinformacion4373 No
@@akmalzaini4853 bruh the goblin is 4x faster running when you are swimming, he's not faster than you on land obviously.
Lmao
OnE HunDrEd Iq
Found myself thinking about that video today - watched it some time ago and it jumped on my mind while looking at the lake.
And then YT decided to recommend it to me once again a few hours later.
I'm scared.
Why escape the goblin when you can just slay goblin?
Because goblins have aids
@@paytonogallagher3284 ?
He has way too much hp for somone without a sword
he moves at mach 10, hes undefeatable
*Happy goblin slayer noices*
Oi that's not a goblin
It's the snow monster from SkiFree95
That's actually my one gripe with the video, of ALL the goblin related material that is available the author had to choose the Yeti sprite from that one ski game.
I came here to write that comment.
Oi that’s not a gnelf
It is a red dot and you've been RED DOTED
This was dope as hell and the music brought me back to the DangerDolan days
that 'goblin' (a yeti btw) is a character from some great old 8 bit ski game. good old times. that yeti got me so many times.
I was thinking more realistically: Continuously swim in rapid, small circles, tire the poor gob out and just walk away.
How about drown him after that ?
How about you exhaust yourself by swiming this much, then drown ?
@@glatykoffi6672 If you wold swim in a 1-meter circle when the lake has a 100-meter diameter, then goblin obviously would be weakened fy his fatigue very quickly.
@@epigone1796 You are in water, using more than 4 time the energy to move, not even counting the energy to stay at the surface.
You will most likely drown before he is tired.
@@glatykoffi6672 C = pi * d
1 m diameter --> 3.14 m per lap.
100 m diameter --> 314.15 m per lap
I think that swim 3 meters easier than run 300 meters.
I faced this question a while ago in the form of a swan and a predator. I had accidentally solved this problem without knowing the real answer, but had pursued a different method based on the information given in the riddle - You could swim in circles of the pond/lake in order to create a flow, which if done enough times would help you accelerate faster than the entity you're trying to avoid.
Circling was the answer, but it was came upon using a different perspective.
"If you can get to land, you can sprint off and escape"
"The goblin is 4 times faster than you"
Which is it then?
I mean, even a toddler can run faster than Michael Phelps can swim. Mike can definitely run faster than that toddler on land though.
@@paulmahoney7619 yeah, in water you swim 4x slower than the goblin runs, but on land you run faster than the goblin
Wow i didn't know the Skifree yeti was a goblin this whole time!
Thanks for uploading the code! I tried it a few times and eventually got it! Keep up the great work!
Reminds me of Vsauce!
🅱Sause
🅿️Sauce
♾Sauce
🍅sauce
🌳sauce
Idk how, but the graphics of the game are a beautiful mix with that jazz sound. It makes me think of old noir movies. The colors of the scene make it look like night time which adds to the great atmosphere of this video. I don't know how but this is just art
Wow, great puzzle with a surprisingly complex optimal-route answer!
I remember him from this ski game, he always ate you at the end of the track
The problem is more simple than that. The goblin can't eat you if you eat the goblin first. It's just a goblin.
The goblin has aids, so if you eat it, you'll probably get aids. Goblin aids.
Now i know what to do if I find myself in a circular lake with a monster awaiting for me on the shore.
I've been looking for this forever
That’s the abominable snow man from that oldddd ski game I used to play wow. So many memories
I would just dive and goblin couldnt see me
Alternatively, be the Goblin Slayer. That way the goblin runs AWAY from you when you get to shore.
Easy, casually swim to the edge and start spitting water at the goblin to get him to go away.
if this was goblin slayer, the goblin would be running away
DeVi0uS No. If this was "Goblin slayer", then the goblin would be arguing with you about whether red or green armor is the best.
No,the Goblin would be in the lake,and Goblin Slayer will be chasing him
Very cool, please keep making videos :)
Holy cow, the ski free monster! I haven't seen that thing in ages!
this is what my maths teacher said i'd use maths for in the future
i've got him to thank for keeping me alive today
I can easily escape the goblin by summoning a Goblin Slayer.
Go underwater so he can’t see you, then swim to the opposite side of where he is, then pop out and run away before he gets there.
That would be a good solution, problem is I doubt you can hold your breathe for too long
"Even knowing the solution, it still takes a lot of skill."
Yeah, I can't swim for nuts.
how do you play the game?
Slightly move over the center point forcing the goblin to run laps, slowly walk away after it collapses from exhaustion.
DID SOMEONE SAY GOBLINS?!?
Orcbolg
Bold of you to assume that i am no match for a goblin in hand to hand.
made my day better
Bold of you to assume I can swim
Reloads remington after blasting the goblin
Awe I was bummed, I saw the goblin from the old ski game and thought you'd cover that.
Imagine trying to escape with 5-10 Goblins with a lake 10x Enormous than the other.
Cant wait for the sequel and the prequel
I thought we were going to be presented by a big math problem but we get the answer pretty fast.
Isn't it supposed to be a yeti from this really old PC game I played when I was a kid?
00:00:26 yes, just swim in a circle around the middle about 30% of the way to the edge (i can't remember the exact number) and when you are opposite the goblin, swim quickly to shore and then you will narrowly escape
That is some serious confidence on the swimmer thinking they can escape on land when the goblin is moving over 100 miles an hour in parallel to the swimmer
Numberphile made the same video but with a cat and a mouse. They also made merchandise about it.
Really interesting question. Though if we ignore the math part for a moment and consider this if it were to happen realistically, even once you got to the shore the goblin would be able to catch up fairly quickly. Especially considering how tired you would be once you made it to shore.
The best strategy is to dive until you are near the land. But it is really a funny game. Thank you for the link. :)
For his neutral special, the swimmer has a *_G U N_*
so if this were real life i have to swim in circles with a certain distance from the center in first perspective?.
i would die from drowning because of the fatigue even before the gobline eats me.
To be fair, unless the goblin got some godly stamina, it would get tired really fast
@@bernartikyou would get hypothermia
To be fair, dying of exhaustion and drowning is less painfull then getting your flesh teared apart as the goblin slowly chomps on your meat
If the goblin cAn see u across the lake, he will easily catch u when leaving the shore
I saw this guy on r/place for the first time, weird how now i get reccomended a video about this pixel guy right now as i saw him in r/place for the first time.
Thanks. This really saved me
That’s the frickin yeti in the windows 98 ski game lol
I was the goblin the whole tiiiime
I like that you used the ski free yeti.
My "try before I continued watching": You should go for one direction, but then as the goblin is moving, exploit that by actually going further and further away from the point where you were originally going to land. That should give you some extra time, and might let you win
Hes not a gnobling , hes a GNOME
"You were Eaten"
Lol
Just wait until the goblin goes to sleep or loses interest.
_Can you escape the goblin?_
*Heck yeah I can!*
_[Math puzzle]_
*Heck no I can't!*
Why use math if you could drown the goblin since he can't swim in the first place ?
Will the Gnoblin Gnomed me as well?
FreeSki not FreeSwim.
Before watching the solution, I got ~7.28 or 1+2pi as the fastest the goblin could travel. Here's my math
I assumed that your velocity is 1 unit distance/unit time and the goblins velocity is vg(for velocity of the goblin) units/unit time.
Using some calculus I got to the same conclusion you did that you can go in a circle of radius 1/vg and gain distance on the goblin. My initial plan was to go in a spiral that started by moving in the opposite direction from the goblin and then moving at the perfect angle that would keep the goblin on the opposite side of while moving as far away from the center in dt seconds. I found that once you hit 1/vg units away from the center, you couldn't move farther away from the center without the goblin gaining on you. Anyway, the point is you're 1/vg units from the center, at which point your best bet is to just swim for the shore. You have to travel (1-1/vg) units, which takes you (1-1/vg) units of time and the goblin has to travel 2pi units, which takes it 2pi/vg units of time. So at max goblin speed,
1-1/vg = 2pi/vg
+1/vg = +1/vg
1 = (2pi+1)/vg
vg = 2pi+1
Correct me if anything is wrong
again u r insane man. That's damn good
*record scratch* *freeze frame* yep, that me. you're probably wondering how I got myself into this situation
*Well KEEP WONDERIN', PAL! I ain't explainin' NOTHIN'! This ain't a movie! X^D*