The Cast Devil and Harmony Puzzles

  • Added:  3 months ago
  • This week I cover two puzzles, to demonstrate a common solution tactic.

    Please subscribe if you like the video!

    The Cast Devil and Cast Harmony Puzzles are both available in a variety of places, but here is one:


    I'm a Top-10 finisher in the US Puzzle Championship and just released a logic puzzle game on Steam! The game is called RYB:

    Intro song: Tekvision - Mycoplasma
    Intro template: /SDJGRedstoneDJ
  • Video CategoriesFilm & Animation
  • Runtime: 3:3
  • Tags for this video:  hanayama  cast harmony  cast devil  ryb  fleb  puzzle  logic  rubik  mechanical  sudoku  toy  solution  game  fun  

Comments: 123

  • paper doggo
    paper doggo 6 days ago

    I have the cast devil!!

  • ZeidGho
    ZeidGho 9 days ago

    Me, having zero experience in these puzzles, went out and bought the Cast Quartet! Which is level 6 difficulty.. to put you into perspective, the Harmony is at level 2, and the Devil is at level 4!
    No I'm not even close to solve it

    • FLEB
      FLEB 8 days ago

      Good luck!

  • thijmnesoy
    thijmnesoy 11 days ago

    I want these puzzles

  • I'm a Deer
    I'm a Deer 13 days ago

    imo the devil is easy

  • Betsabeth Mendez
    Betsabeth Mendez 16 days ago

    *pats self on the back *

  • Averagely Cubing
    Averagely Cubing 16 days ago

    I still don't understand how he did the first puzzle, he went too fast

  • BasisFazer
    BasisFazer 17 days ago

    Surprisingly I have the cast devil at my house, but I never knew what the two pieces were. Thanks!

  • Chris
    Chris 19 days ago

    am I the only one that reads his name "fleeb" like the fleeb from rick and morty

  • Viel Francisco
    Viel Francisco 21 day ago

    wow i actually solved the Cast Devil before even knowing your channel :)

  • DaddyLongLegs
    DaddyLongLegs 21 day ago

    Damn now I need to buy some puzzles. Even though I'm not the one salving the puzzle these videos always relax me and make me feel intelligent.

  • hanah chang
    hanah chang 22 days ago

    i only know how to solve the cast devil puzzle, i dont have the harmony one

  • LightishRedGummi
    LightishRedGummi 29 days ago

    I remember the cast devil being in my elementary school GT classroom! The other students and I would always be trying to figure it out, I'm pretty sure on multiple occasions one of us figured it out but weren't sure how we did it XD

  • Baron Von T.
    Baron Von T. 1 month ago

    0:39 HNNNNNNNGH that note has a flag and a hole

  • Beanie boo World
    Beanie boo World 1 month ago

    At our school we did it at PBL ( Project Base Learning) I go to a 21st central school

  • Emaly Rodriguez
    Emaly Rodriguez 1 month ago

    I have the cast devil when I was 3 my parents taught me to solve it and then showed their friends who were like how?

  • Klein Antonio
    Klein Antonio 1 month ago

    Hey did you just get engaged?

    • FLEB
      FLEB 1 month ago

      I'm actually married! My first anniversary is in a few weeks!

  • CLAIRE sellnow
    CLAIRE sellnow 1 month ago

    My dad was able to solve the cast devil in about 15 minuets

    • FLEB
      FLEB 1 month ago


  • CrazyKid 52
    CrazyKid 52 1 month ago

    I love this because I'm a musician and I love puzzles :D

  • joannaz
    joannaz 1 month ago

    My math teacher used to call these kinds of puzzles, "tavern puzzles" :D

    • joannaz
      joannaz 1 month ago

      +FLEB Ohh...glad you clarified for me!

    • FLEB
      FLEB 1 month ago

      These aren't tavern puzzles, but that is a class of puzzle! Tavern puzzles are take-offs of the horseshoe puzzle and are usually made of much thicker metal.

  • David's Favorite Videos

    Not a 'Happy hacking' this time?

    • FLEB
      FLEB 2 months ago

      What do you mean?

  • Establishment
    Establishment 2 months ago

    i have the cast devil!!

  • GingerBreadSed
    GingerBreadSed 2 months ago

    I got the Cast Devil with a set of 6 similar puzzles! The first time I solved it was while absentmindedly pushing the pieces around since I couldn't find the solution for so long 😅 Love the feel of it!

    • FLEB
      FLEB 2 months ago

      I do to! There's a reason it's a classic!

  • Juanito Macho Protegido

    These are the only puzzles you presented I was able to solve haha

  • Parpy
    Parpy 2 months ago

    the cast devil is really easy once u know the trick! i have one too

  • that_guy_in_a_bowtie
    that_guy_in_a_bowtie 2 months ago

    My dad bought me the cast devil on a road trip around Australia. He said that if i could figure it out by the time we got to townsville, he would get me an ice cream. Kept me thinking for a while, but i figured it out pretty quickly! very fun!

  • dried nut
    dried nut 2 months ago

    i have the cast devil somewhere... it was fun to solve when i was a kiddo.

  • Cup of Saltyness
    Cup of Saltyness 2 months ago

    I have the cast devil one and few more

  • Hays Dixon
    Hays Dixon 2 months ago

    These puzzles are very beautiful in look, which I enjoy.

  • reezdog
    reezdog 2 months ago

    I found three of these at the Dollar Store. they are fun. I got two other wooden ones but can't put one of them back together. way to hard.

  • Oiiioi
    Oiiioi 2 months ago

    I had a Cast Devil puzzle as a kid... I may have tried to force it the wrong way so many times it became permanently warped...

  • Extys
    Extys 2 months ago

    I feel very clever when I find the solution in the first look. :^)

  • Dana Ondráčková
    Dana Ondráčková 2 months ago

    It looks so easy! Yet I would rather break it after many tries :D once I was playing with the "hedhehog in the cage" and not knowig it was a puzzle (I was a kid) I somehow managed to take it out of its cage and I run to my family crying that I broke it :D

  • Sean Le
    Sean Le 3 months ago

    i want to give that cast harmony puzzle to my band instructor

  • John Doe
    John Doe 3 months ago

    my father brought me 'the cast devil' when I was 13... i solved it but i didnt know how, until now.. 9 years later lol, im glad i saw this and know its name..

  • Lucoa
    Lucoa 3 months ago

    I solved the cast devil by just flinging it around because i want bored lol

  • PiggyMC
    PiggyMC 3 months ago

    my classmate had a cast devil and brought it to school, she gave it to some friends and they couldn't beat it.... then she gave it to me and i did it in like 10 seconds....

  • Chase Theodorides
    Chase Theodorides 3 months ago

    Omg I did those in 8th grade so easy :P

  • Riiko Karppinen
    Riiko Karppinen 3 months ago

    i have the cast devil i did in like 10 mins

  • Bartosz Olszewski
    Bartosz Olszewski 3 months ago

    I just hate the smell that metal leaves on your fingers after you fiddle too long with these puzzles

    • Lucoa
      Lucoa 3 months ago

      Bartosz Olszewski why the fuck do you smell your finger after using these

  • Adrian
    Adrian 3 months ago

    I solved a miniature devil one when i was 6(i at least hope it was the same)

  • vcblueworld123
    vcblueworld123 3 months ago

    You did good did good.

  • Mindboggler123
    Mindboggler123 3 months ago

    I was able to figure out that harmony puzzle just by looking at it, not the devil one though

  • JettFox
    JettFox 3 months ago


  • JettFox
    JettFox 3 months ago

    Legend has it, if you're a musician, he will pin AND favorite your comment!

    • JettFox
      JettFox 3 months ago

      FLEB glad to help

    • FLEB
      FLEB 3 months ago

      Cool! I didn't know that feature existed!

    • JettFox
      JettFox 3 months ago

      FLEB yes, just tap on the "options" button right next to the comment and tap "pin"

    • FLEB
      FLEB 3 months ago

      I can pin comments?

  • dpkeys
    dpkeys 3 months ago

    The music one is just like when my keys get all tangled up.

  • Nagem1617
    Nagem1617 3 months ago

    I have the harmony one. I got it because it was music notes lol. figured it out pretty quickly

  • clasherultimate1603
    clasherultimate1603 3 months ago

    How is this channel not subbed more? Awesome stuff. Keep going. Subscribed.

  • Keiran Wilmot
    Keiran Wilmot 3 months ago

    You should play your "spoiler break" at the start of your video because it is really just your intro

  • Alex B
    Alex B 3 months ago

    It's so weird that he basically just announces his intro in his videos, as if it were some sponsored advertisement. And in like the very middle of the video.

    • General Milky
      General Milky 3 months ago

      Not that weird. What else would he put there? He has a pause so if people who don't want spoilers for the puzzle are watching they can click away.

  • Alex B
    Alex B 3 months ago

    It's so weird that he basically just announces his intro in his videos, as if it were some sponsored advertisement. And in like the very middle of the video. 😬😂

    • Eqq Tart
      Eqq Tart 3 months ago

      Alex B It's a spolier break. If you don't want to watch the solution then you have a warning and time to leave the video.

  • Alex B
    Alex B 3 months ago

    It's so weird that he basically just announces his intro in his videos, as if it were some sponsored advertisement. And in like the very middle of the video. 😬😂

  • Russell Profant
    Russell Profant 3 months ago

    There is this really cool twisted nail puzzle plz review it I will link a pic

    • Rhyme Bito
      Rhyme Bito 1 month ago

      I have a variation of that with 3 nails, it's the exact same solution but slightly more overwhelming.

    • Katie Jones
      Katie Jones 2 months ago

      I have that one! my grandmother gave it to me and I love twisting it around in my hands even though I already solved it

    • FLEB
      FLEB 3 months ago

      That's a classic puzzle! There are a number of interesting variations on it, I think I have one around here somewhere...

    • Russell Profant
      Russell Profant 3 months ago

      There is multiple ways to solve and scramble it and it's really fun

    • Russell Profant
      Russell Profant 3 months ago

  • Two Duy
    Two Duy 3 months ago

    Is there any puzzles that beginners should start with?

    • FLEB
      FLEB 3 months ago

      I have a strange electronic puzzle from the 90's. That might be closer to what you're talking about!

      Otherwise I have a number of multiple step puzzle boxes. Not sure when I'll cover them, but I'm hoping to soon!

    • Two Duy
      Two Duy 3 months ago

      FLEB those puzzle that have more than one step like the avengers box those are cool but seem diificult

    • FLEB
      FLEB 3 months ago

      What kind of puzzles are you interested in? The world of puzzles is huge and vast!

  • Henji96
    Henji96 3 months ago

    Wow they were both very easy. Glad the solution I had imagined in my head was the real solution for both puzzles.

  • Jonah Matthews
    Jonah Matthews 3 months ago

    i love these videos so much. he is so passionate about the puzzles that it makes it really entertaining

  • Jordan Whittle
    Jordan Whittle 3 months ago

    do you have any more like the "xbox puzzle"?

    • FLEB
      FLEB 3 months ago

      In what way? Lots of the puzzles I've covered are similar to the Xbox puzzle. Specifically what are you interested in?

  • JPK314
    JPK314 3 months ago

    Heyyy, I actually have both of these :D

    • FLEB
      FLEB 3 months ago


  • Utsuro Hako
    Utsuro Hako 3 months ago

    Feel like the Japanese are the best at these puzzle making

  • Dragon Fox
    Dragon Fox 3 months ago

    No offense but duhhh

  • Michael White
    Michael White 3 months ago

    really enjoy your videos Fleb!

    • FLEB
      FLEB 3 months ago

      Thank you very much!

  • Numnum
    Numnum 3 months ago

    Solved them both in my head immediately

  • TheNintendoFan37
    TheNintendoFan37 3 months ago

    I always look forward to your videos!

    • FLEB
      FLEB 3 months ago

      Thank you!

  • Trailer Park Mom
    Trailer Park Mom 3 months ago

    Scott k are you there. I am back

  • DJ Scribbles
    DJ Scribbles 3 months ago

    I love puzzles

  • GOLD 1515
    GOLD 1515 3 months ago

    I only have the enigma puzzle since Christmas and I haven't solved it yet. :(

    • GOLD 1515
      GOLD 1515 3 months ago

      +FLEB I haven't given up yet, though! I'm still trying! :)

    • FLEB
      FLEB 3 months ago

      The enigma puzzle from Hanayama? That's probably the most difficult puzzle they sell. It's not easy!

  • Nexxscorn
    Nexxscorn 3 months ago

    I love this channel.

    • FLEB
      FLEB 3 months ago


  • Pedro Scoponi
    Pedro Scoponi 3 months ago

    So elegant, both in shape and solution! I like it :D

    • FLEB
      FLEB 3 months ago

      I think both are really cool puzzles. They're deceptively simple!

  • Manzanella
    Manzanella 3 months ago

    these videos always make me smile :)

  • thenewgoddamngambit
    thenewgoddamngambit 3 months ago

    Oh right! I now remember i subbed to this channel a few months ago!

  • dreadpiratekiel
    dreadpiratekiel 3 months ago

    nice to see you cover one I actually own. the got the devil one some time ago and it has been one of my favorite for it's deceptive simplicity. cool to learn a little of its history as well. love the channel, keep up the good work.

    • FLEB
      FLEB 3 months ago

      Thanks! I'm glad I could cover one that you own!

  • constantin craciun
    constantin craciun 3 months ago

    Ok. I really love your videos and I would like to see more. Saw one of your videos on reddit. Thank you.
    Btw FLEB is not your real name right? :)

  • Jason M
    Jason M 3 months ago

    You should do a collab with Oskar van deventer, maybe even create a puzzle together

    • FLEB
      FLEB 3 months ago

      That would be cool! He seems like a nice guy.

  • pipo plus
    pipo plus 3 months ago


  • PompeyDB
    PompeyDB 3 months ago

    Another brilliant puzzle. Thank you.

    • FLEB
      FLEB 3 months ago

      I'm glad you enjoyed it!

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