How does Dobble (Spot It) work?

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  • เผยแพร่เมื่อ 28 เม.ย. 2021
  • Check out www.kiwico.com/standupmaths and get 50% off your first month of any subscription!
    Subscribe to Steve Mould’s channel. I sent him the next video challenge along with the Monomatch cards. / stevemould
    Support me on Patreon and get sent three "Monomatch Myriad" cards to check.
    / 50645477
    Here is the bonus 'behind the cards' video on how I made Monomatch Myriad.
    • How I made a game with...
    It occurs to me it would be foolish to not provide Amazon referral links but don’t forget about your local independent toy retailers!
    USA SPOT IT: www.amazon.com/s?k=spot+it&re...
    UK DOBBLE: www.amazon.co.uk/s?k=dobble&r...
    This is the student video I mentioned:
    "How to make the card game Dobble (and the Maths behind it!)"
    • How to make the card g...
    Double Dobble
    aperiodical.com/2020/05/the-b...
    Droste Dobble
    christianp.github.io/droste-do...
    mathsjam.com/assets/talks/201...
    "A finite projective plane exists when the order n is a power of a prime."
    mathworld.wolfram.com/Project...
    Finite projective plane of order 4 image from here:
    demonstrations.wolfram.com/Pr...
    Catch the match!
    boardgamegeek.com/boardgame/1...
    The American Mathematical Monthly
    Vol. 13, No. 11, Nov., 1906 www.jstor.org/stable/i349244
    Vol. 14, No. 5, May, 1907 www.jstor.org/stable/i349250
    CORRECTIONS
    - At 06:35 Dimitri Provoost spotted that some of the star and cross symbols on the diagonal red lines are accidentally swapped around. Good spot Dimitri!
    - I think once or twice I say "card" when I mean "symbol". I blame too much time spent with projective planes.
    - Let me know if you spot any other mistakes!
    Thanks to my Patreon supporters who keep me well-stocked with children's card games. And now 101 pentagons all featuring a happy little house.
    / standupmaths
    Filming and grading by Alex Genn-Bash
    Editing by Matt Parker
    Graphics by Sam Hartburn and Matt Parker
    Music by Howard Carter
    Design by Simon Wright and Adam Robinson
    MATT PARKER: Stand-up Mathematician
    Website: standupmaths.com/
    US book: www.penguinrandomhouse.com/bo...
    UK book: mathsgear.co.uk/collections/b...
  • บันเทิง

ความคิดเห็น • 2.6K

  • @standupmaths
    @standupmaths  3 ปีที่แล้ว +703

    To clarify: all patreon supporters will be emailed 3 Monomatch Myriad cards that no else will get. Solely so they can check them. Report findings here: www.patreon.com/posts/50645477
    And thanks again to KiwiCo for making great crates and sponsoring this video: www.kiwico.com/standupmaths

    • @TheCaphits
      @TheCaphits 3 ปีที่แล้ว +11

      Make this into an NFT (and send me one for the idea?)!

    • @rohitraghunathan
      @rohitraghunathan 3 ปีที่แล้ว +23

      I don't think it'll matter but 10303 isn't divisible by 3. You'll have a card leftover

    • @Agrajag22
      @Agrajag22 3 ปีที่แล้ว +5

      At 20:35 I think you meant to say “two SYMBOLS that match” (not cards)

    • @SioxerNikita
      @SioxerNikita 3 ปีที่แล้ว +2

      CAn't help you with the million subs sadly... Been subscribed for years.

    • @gz3zbz
      @gz3zbz 3 ปีที่แล้ว +3

      You didn't link to Steve Mould's channel.

  • @noahbaden90
    @noahbaden90 3 ปีที่แล้ว +5433

    It's funny. Matt says that he and Steve Mould are both close to 1,000,000 subs, when the reality is actually that they are both close to *the same* million subscribers.

    • @unclejimmy7
      @unclejimmy7 3 ปีที่แล้ว +355

      When I saw Steve's video in my subscription box, I said to myself, "nice, I can't wait to see Matt's video in my subscription box."

    • @vigilantcosmicpenguin8721
      @vigilantcosmicpenguin8721 3 ปีที่แล้ว +371

      When is Matt going to examine the set theory of his and Steve's subscribers?

    • @xyz39808
      @xyz39808 3 ปีที่แล้ว +78

      Certainly the most _boring_ way to optimally order a million unique items

    • @YouLoveBeef
      @YouLoveBeef 3 ปีที่แล้ว +52

      @@vigilantcosmicpenguin8721 Well I would be the anomaly then. I am not yet subscribed to Steve Mould. Didn't know of him until today.

    • @epauletshark3793
      @epauletshark3793 3 ปีที่แล้ว +37

      @@YouLoveBeef it is quite a good channel.
      And yes, I do love beef.

  • @deanperkins2091
    @deanperkins2091 3 ปีที่แล้ว +4656

    The legendary “Parker’s Dobble”

    • @Wolforce
      @Wolforce 3 ปีที่แล้ว +130

      Yes thanks i was looking for this

    • @TimMaddux
      @TimMaddux 3 ปีที่แล้ว +269

      “It is on-brand.” -Matt Parker

    • @jamesonhardy2126
      @jamesonhardy2126 3 ปีที่แล้ว +50

      Kind of looking like he's doing it on purpose now.

    • @EPMTUNES
      @EPMTUNES 3 ปีที่แล้ว +42

      Parker little house

    • @aperson1
      @aperson1 3 ปีที่แล้ว +9

      you have no idea how right you were.

  • @Bigandrewm
    @Bigandrewm 3 ปีที่แล้ว +1823

    Here's a fun game: actually print out all 10,303 cards and sell them individually, maximum 1 per person. Then, a person who bought one who meets another person who bought one can compare their cards and find out what matches.

    • @AleksandrStrizhevskiy
      @AleksandrStrizhevskiy 3 ปีที่แล้ว +91

      That's actually brilliant! What a wonderful meetup idea.

    • @aldude9511
      @aldude9511 3 ปีที่แล้ว +60

      As you find each symbol on another card you can have them initial it!

    • @_shadownotes_
      @_shadownotes_ 2 ปีที่แล้ว +49

      They should be able to steal it! It would be the biggest game of spot it ever.

    • @JungleLibrary
      @JungleLibrary 2 ปีที่แล้ว +70

      Then it just happens to be that it's always the happy house

    • @VivekYadav-ds8oz
      @VivekYadav-ds8oz 2 ปีที่แล้ว +11

      "Find your soulmate with this simple (tarot) card game!"

  • @muellerhans
    @muellerhans 3 ปีที่แล้ว +1416

    The reason why this game doesn't include 57 cards is indeed that the printing company that is used by asmodee (the game company that acquired the rights to Dobble) can only print 55 cards on a print sheet. That's what asmodee told to a german math TH-camr (DorFuchs) which they sponsered to promote the game.

    • @AleksandrStrizhevskiy
      @AleksandrStrizhevskiy 3 ปีที่แล้ว +90

      Should have made a separate print sheet that just prints the missing cars and sorts them into the other sets. But I'm not a business man, maybe that would be too much extra cost for no gain.

    • @hornylink
      @hornylink 3 ปีที่แล้ว +57

      @@AleksandrStrizhevskiy that literally doubles the printing costs of the cards to just add 2 cards. (they're gonna charge you for the whole sheet, going from 1 to 2 sheets doubles pricing)

    • @AleksandrStrizhevskiy
      @AleksandrStrizhevskiy 3 ปีที่แล้ว +100

      @@hornylink Well it shouldn't double it. You would have one extra sheet for every couple of sheets(55/2 = 22 sheets). But yes they would have to pay more and very few people would appreciate the fact that the set is complete.

    • @hornylink
      @hornylink 3 ปีที่แล้ว +38

      @@AleksandrStrizhevskiy nah look at OP, they say that all 55 cards fit on 1 print sheet, so to add 2 more bringing it to the total 57 they'd need to add a second print sheet. You could technically 27 of sheet one per copy of sheet two and shuffle around cut outs to make use of the extra space on sheet two, but that only works if you're doing it by hand, changing a factory line to do that would be an absurd cost.

    • @AleksandrStrizhevskiy
      @AleksandrStrizhevskiy 3 ปีที่แล้ว +56

      @@hornylink Yeah thats what I was saying printing a special sheet that just has two differ cards. But yes then you have to retool the factory so that the extra cards get sorted with each sheet of 55 and, it makes sense that it isn't worth it.

  • @Zitronenscheibe
    @Zitronenscheibe 3 ปีที่แล้ว +2192

    After the infamous Parker Square comes the long awaited successor: The Parker Pentagon

    • @fdagpigj
      @fdagpigj 3 ปีที่แล้ว +128

      At this rate, we'll be getting the Parker Hexagon in 2026

    • @Ravlen1
      @Ravlen1 3 ปีที่แล้ว +77

      "it's on brand"

    • @TheZotmeister
      @TheZotmeister 3 ปีที่แล้ว +27

      This right here was the comment I was looking for. Would have made it myself if I didn't find it.

    • @jonathanc8845
      @jonathanc8845 3 ปีที่แล้ว +6

      I found it after I made it.

    • @ggw1776
      @ggw1776 3 ปีที่แล้ว +21

      Parker Happy Little House

  • @ericpeterson6520
    @ericpeterson6520 3 ปีที่แล้ว +940

    In the beginning God said, "Let n be an integer greater than 1"

  • @__-cd9ug
    @__-cd9ug 3 ปีที่แล้ว +763

    When he spotted the happy little house instantly, after I spent 5 minutes not finding it, I though he was some sort of savant

    • @driesvanoosten4417
      @driesvanoosten4417 3 ปีที่แล้ว +6

      I did spot it!

    • @adampayton4695
      @adampayton4695 3 ปีที่แล้ว +24

      There's also a second pair! An circle with an arrow inside! However they are different colors so maybe it's also like the "catch the match game"?

    • @MD-vs9ff
      @MD-vs9ff 3 ปีที่แล้ว +19

      He is "some sort of" savant.
      A Parker savant.

    • @romaindubray2325
      @romaindubray2325 2 ปีที่แล้ว +11

      @@adampayton4695 That symbol really made me question wether or not he had made them match color as well... decided I'd gone too far to give up now, so that HappyLittleHouse™ was a real relief to find, even though it was one of the last symbols I checked.

    • @jonahwolfe3396
      @jonahwolfe3396 2 ปีที่แล้ว +1

      Same! It took me 4 minutes to find the house. After three minutes I was about to give up but decided that I wanted to prove to myself that my attention span can last more than 3 minutes. But yah, when I saw that he found it in 5 second I was like “what?! How is he so good at this game!” Then I was laughing after he revealed what actually happened.

  • @Maseiken
    @Maseiken 3 ปีที่แล้ว +408

    N: "I wish I could be an integer."
    Mathematicians before 1906: : "Absolutely not."

    • @sorellana2154
      @sorellana2154 3 ปีที่แล้ว +5

      lmaooooo

    • @barbapappa99
      @barbapappa99 2 ปีที่แล้ว +2

      OK, I'll bite. Why?

    • @TSiAhmat
      @TSiAhmat 2 ปีที่แล้ว

      oh and before i forget, N stands for any number between (- infinity) to (+ infinity) [if we are talking about math]

    • @Maseiken
      @Maseiken 2 ปีที่แล้ว +19

      @@barbapappa99 before that no one suggested letting it.

    • @tapatorta
      @tapatorta 2 ปีที่แล้ว +2

      I love you

  • @gregjensen2482
    @gregjensen2482 3 ปีที่แล้ว +905

    Summary of Stand-up Maths: "What Matt has done: It's on brand."

  • @wrathofnerds
    @wrathofnerds 3 ปีที่แล้ว +734

    "I was so close to not admitting, but...it's on brand"

    • @jfein7273
      @jfein7273 3 ปีที่แล้ว +38

      Classic Parker Square

    • @martinnovacek9151
      @martinnovacek9151 3 ปีที่แล้ว +1

      Came here to say this :D

    • @nanamacapagal8342
      @nanamacapagal8342 3 ปีที่แล้ว +2

      @@kyozpsycho Prof pic checks out

    • @StarstormHUN
      @StarstormHUN 3 ปีที่แล้ว +1

      @@jfein7273 At this point I'm kind of afraid to ask, but where does Parker Square originally come from?

    • @FLScrabbler
      @FLScrabbler 3 ปีที่แล้ว +1

      @@StarstormHUN 😂😂😂👍🏻 Well, it was an almost perfect magic square that Matt had come up with...

  • @_FirstLast_
    @_FirstLast_ 3 ปีที่แล้ว +511

    The "Happy Little House" story was so funny at the end of all the sweaty maths. Love how the universe just gave him that little gift at the end, and he decided to share it with us!

    • @josiahsimmons9866
      @josiahsimmons9866 2 ปีที่แล้ว +15

      Not gonna lie, the happy little house made me so mad because I spent like 10+ mins trying to find the symbol :rofl:

    • @hansrens2453
      @hansrens2453 10 หลายเดือนก่อน

      The hilarious twist for me : watching the video, this man is amaaaazing.
      And when he 'found' those 2 smiling houses, then found them again, it was like : so the third card is on a row that links the first two. Nice, he simplified the game.
      I interrupted the video to have a supper break, wondering whether another 3 cards in his 101 selection would share a "row" ?
      Row, row,row the cards, merrily row the cards ?
      Btw: Was the number 101 an random choice, or deliberately chosen : find the link 101?
      And after supper break : WOW he admits having chosen that one single row. Amongst 10 000 + cards, pick 100, or 1%, and it ends up to be
      Where is Wally, over and over and over...
      This learned me another thing: it might very well be fun, searching Wally pictures, to find a second match. Probably not intended, but would we find one?

  • @Motinu
    @Motinu 3 ปีที่แล้ว +210

    German maths youtuber Dorfuchs asked the producer of the game about the 2 missing cards and the answer was that only 55 cards fit on a print sheet. In his video at about 7:52, automated subtitles in english available.

  • @Mrsparky492
    @Mrsparky492 3 ปีที่แล้ว +872

    Others might call it a parker dobble, but I'll use a term from earlier in the video it's a 'doh'bble.

    • @xxgn
      @xxgn 3 ปีที่แล้ว +6

      I was looking for this comment.

    • @cjhanson7936
      @cjhanson7936 3 ปีที่แล้ว +5

      Oh my glob! That is literally the first thing that came to mind when I was watching. Then I saw your comment. Hilarious!!! ....classic Parker thing to do 🤣

    • @oz_jones
      @oz_jones 2 ปีที่แล้ว

      Parker Pentagon.

  • @bloergk
    @bloergk 3 ปีที่แล้ว +341

    Who would have thought there could be such SORROW in the short phrase "happy little house"...

  • @wouterlahousse9637
    @wouterlahousse9637 3 ปีที่แล้ว +225

    What is your nightmare about?
    Pythagoras: irrational numbers
    Euler: e=3
    Cantor: infinity
    Einstein: Heisenberg's uncertainty principle
    Galois: duelling
    Parker: A happy little house...

    • @bonifaceawa
      @bonifaceawa 3 ปีที่แล้ว +8

      Parker, and Bob Ross!

    • @uklu
      @uklu 2 ปีที่แล้ว +6

      Matt's nightmare is obviously about the clown icon

    • @phichyasuadsawad1583
      @phichyasuadsawad1583 20 วันที่ผ่านมา

      No e is 2.718281828459045

  • @KaiLucasZachary
    @KaiLucasZachary 2 ปีที่แล้ว +187

    I work professionally as a tutor, and using your guide, I've created my own version of Hebrew Dobble so that I can help people learn how to identify Hebrew letters and vowels.
    This video is the most comprehensive explanation of the game that I've ever seen.

    • @homelessrobot
      @homelessrobot 9 หลายเดือนก่อน +6

      pretty cool application

    • @jubileeYAVEL
      @jubileeYAVEL 4 หลายเดือนก่อน +2

      That's awesome!!!!!!

  • @nocturnhabeo
    @nocturnhabeo 3 ปีที่แล้ว +675

    I feel like every programmer on the planet has done this type of embarrassing mistake. You're awesome man.

    • @oz_jones
      @oz_jones 3 ปีที่แล้ว +18

      Parker Match

    • @nocturnhabeo
      @nocturnhabeo 3 ปีที่แล้ว +27

      @UCjlY2PsJoAlrzhK-N8djvVA Saying to yourself "Oh I'll just take the first one of X data set" which results in an annoying or unhelpful pattern you didn't think would show up.

    • @skyjoe55
      @skyjoe55 3 ปีที่แล้ว +42

      "I see no reason random() shouldn't always return 3"

    • @LCrowsbeak
      @LCrowsbeak 3 ปีที่แล้ว +3

      @@skyjoe55 or 7

    • @stijnvandrongelen5625
      @stijnvandrongelen5625 3 ปีที่แล้ว +1

      @@skyjoe55 Are you a Debian maintainer?

  • @quinnmartin4236
    @quinnmartin4236 3 ปีที่แล้ว +1049

    The fact that you ended up going full circle and making Spot the Atom accidentally is just too conveniently ironic. God has conspired against us all and it was hilarious.

    • @tristanwegner
      @tristanwegner 3 ปีที่แล้ว +18

      Yeah, I was so happy that he decided to admit it!

    • @johannschiel6734
      @johannschiel6734 3 ปีที่แล้ว +31

      A parker monomatch game...

    • @Intermernet
      @Intermernet 2 ปีที่แล้ว +31

      God may not play dice, but he definitely plays "spot the happy little house".

    • @IRONMANFAN-oc9fr
      @IRONMANFAN-oc9fr 2 ปีที่แล้ว +6

      He said in the video that maths is all about spotting patterns and he has inadvertently PROVED this very fact! HAHAHAHAHAHHAHAHAHA

  • @r0cketplumber
    @r0cketplumber ปีที่แล้ว +3

    "Let n be an integah!" That's how you get people hooked! What an opener!
    I hooted at that.

  • @Corwin256
    @Corwin256 3 ปีที่แล้ว +43

    I love your ability to take giant mistakes, make them hilarious jokes, and then build a message that it's OK to be imperfect. Come for the laughs, stay for the life-changing attitude shift. And more laughs.

  • @JavierYahiko
    @JavierYahiko 3 ปีที่แล้ว +325

    i love how monomatch myriad ended up giving parker square vibes

    • @nex
      @nex 3 ปีที่แล้ว +27

      Yeah; I immediately thought “cool, he's made Parker pentagons” :)

    • @AaronHollander314
      @AaronHollander314 3 ปีที่แล้ว +9

      It took me 10 minutes to find the match. The more I look the more I saw new symbols.

  • @zacharybarbanell1064
    @zacharybarbanell1064 3 ปีที่แล้ว +370

    Having done the math before, and having also wondered why there's 55 cards instead of 57, I came to the reasonable conclusion that it's because, since the main way to actually play the game starts with a single card in the center, the remaining 55-1=54 cards can be evenly divided among various numbers of players.

    • @matthewstuckenbruck5834
      @matthewstuckenbruck5834 3 ปีที่แล้ว +46

      Interesting, but why then is the junior version 30 cards? 29 doesn't split very easily. Are the rules different?

    • @alxjones
      @alxjones 3 ปีที่แล้ว +33

      This generalizes in an interesting way. If you have N cards to divide amongst a set of players, what is the "best" number of cards to leave out?
      You could look at the closest "highly divisible number" less than or equal to N, or maybe the number less than or equal to N with the most factors. You might want to prioritize smaller factors since they should represent a more typical group size. You can model this as a question about the LCM of subsets of {1,...,N}. Definitely some interesting mathematics to explore there.

    • @88porpoise
      @88porpoise 3 ปีที่แล้ว +73

      Money is on someone thinking the multiple of five just looks nicer.

    • @MrTyler918273
      @MrTyler918273 3 ปีที่แล้ว +38

      I would guess it doesn't have a mathematical explanation; rather a marketing and/or economic one. Someone in the marketing department probably said "57 (or 31) is an odd number (not just the fact that it is not even, but that it is relatively unusual or unfamiliar). If it will work with a more approachable number, say a multiple of 5, that would look better on the packaging and we can even save a few cents per unit."

    • @jalsing
      @jalsing 3 ปีที่แล้ว +26

      Maybe it's just to save money and waste on printing. They might fit nicely 5 across on the stock before they're cut. Same with the smaller set both are multiples of 5....

  • @jonarcherii
    @jonarcherii 3 ปีที่แล้ว +38

    On your pentagon, there is another set of symbols that (kinda) match. They both have a circle with an arrow in it, and they appear the same except the color is different. My theory is that one was an “up” arrow, and one was a “down” arrow, but that bit of information got lost in the randomization of the rotation of each symbol.

  • @Verlisify
    @Verlisify 2 ปีที่แล้ว +55

    So find century old math columns and make card games out of them
    Interesting business venture

  • @nicksteele5613
    @nicksteele5613 3 ปีที่แล้ว +359

    This is, with no exaggeration, a question I've had for YEARS. The first time I saw a variation on this game it just PLAGUED me as to how they managed to pull this off. Literally can't wait to see.

    • @NoisqueVoaProduction
      @NoisqueVoaProduction 3 ปีที่แล้ว +19

      Yeah, I also was asking myself, puzzled by it.
      It reminds a lot of the logic behind SET. Although SET is a bit more straight forward to the issue while in Dobble it is not part of the gameplay to know how it works...
      But really cool applied math about... Higher dimension? Projective planes? That sort of advanced math... Pretty cool

    • @aidanwalter2823
      @aidanwalter2823 3 ปีที่แล้ว +2

      I bet you literally could have 🙃

    • @Fantastic_Mr_Fox
      @Fantastic_Mr_Fox ปีที่แล้ว

      yeah me too. Well I wouldn't say it has plagued me but yeah I remember 7 year old me or smth like that playing dobble one day (not the first time I had played) wondering A) if all the cards truly had only one match with any other card and B) how they pulled it off

  • @golightning291
    @golightning291 3 ปีที่แล้ว +103

    a game for -6 people? sounds like my social circle

  • @tune_fisch0269
    @tune_fisch0269 3 ปีที่แล้ว +55

    For the German viewers here: Dorfuchs made a very good Video about Dobble a while ago

    • @mandygoring2001
      @mandygoring2001 3 ปีที่แล้ว +4

      And he included an explanation why there are only 55 cards in the game...

    • @SuperMrMuh
      @SuperMrMuh 3 ปีที่แล้ว +2

      @@mandygoring2001 aaand... what is the explanation?

    • @Sebb747
      @Sebb747 3 ปีที่แล้ว +8

      ​@@SuperMrMuh It's this video at roughly this timestamp: th-cam.com/video/vyYSEDGUdlg/w-d-xo.html
      TL:DR he asked the manufacturer and it's indeed limited by printing; the shop can print exactly 55 cards on a sheet.

    • @jankisi
      @jankisi 3 ปีที่แล้ว +1

      I thought I had seen something like that! Thanks

  • @dracuul78
    @dracuul78 3 ปีที่แล้ว +35

    I have always wondered what magic was needed to design the Dobble cards, thanks for this perfect (and hilarious) explanation. I'm so amazed how well you structure your videos and use these excellent visuals. Starting with the silly 'spot the atom' version, and referring back to it later, I was in tears from laughter...

  • @cjjoyce27
    @cjjoyce27 3 ปีที่แล้ว +445

    Can't believe you got Steve to film himself trying to find the happy little house

    • @miriamrosemary9110
      @miriamrosemary9110 3 ปีที่แล้ว +41

      So funny when he finds the happy house on another card and he's so confused

    • @vigilantcosmicpenguin8721
      @vigilantcosmicpenguin8721 3 ปีที่แล้ว +3

      I love how it really showed the passage of time.

    • @AlphaPhoenixChannel
      @AlphaPhoenixChannel 3 ปีที่แล้ว +6

      Can we get confirmation on if Steve was TOLD they were all the smiley house prior to that clip? Because either way, I was rolling...

    • @arfyness
      @arfyness 3 ปีที่แล้ว +6

      @@AlphaPhoenixChannel I really think he didn't tell him.

  • @pseudopod
    @pseudopod 3 ปีที่แล้ว +413

    I like how Matt put the clown mathematically as far away as possible, but it was also the physically closest set of cards

    • @lozzaaa15
      @lozzaaa15 3 ปีที่แล้ว +51

      goes to show that he believes in maths more than he believes in physics

    • @ziwuri
      @ziwuri 2 ปีที่แล้ว +9

      @@lozzaaa15 this... actually almost makes sense, in a weird way.

    • @ahobby
      @ahobby 2 ปีที่แล้ว +3

      Haven't seen it yet, but I'm guessing he's put it away in manhattan distance or chessboard distance or quasi-euclidean distance, something of the sorts, rather than straight up euclidean distance :P

  • @cj719521
    @cj719521 2 ปีที่แล้ว +171

    Paused at 7:00 to say this:
    Okay, but how long did it take to put the 7x7 Feno plane in order like that? The amount of detail you consistently put into these videos is astounding (and so satisfying)! Thank you for the work you do!

    • @liborkundrat185
      @liborkundrat185 2 ปีที่แล้ว +21

      My guess is:
      - The start was to separate all cards with a single symbol, in this case the clown. This left him with 49 cards to be put into the grid and 8 involving the clown to be left on the outside.
      - Then he searched for 7 cards with a shared symbol among the 49, putting them into a single row.
      - Then he searched for 7 cards with a shared symbol among the remaining (42) cards, putting them into another row.
      - Then he repeated the previous step, chopping the amount of remaining cards down to 35, then 28, afterwards 21, 14, and finally the bottom row of 7.
      - Then he rearranged all symbols within each row so there was a shared symbol (same match) in the whole column.
      And by process of mathematics, that should be enough to get the final picture, as the symbols in the diagonals are defined by the rows and columns. So, it probably didn't take *too* long with a system like this, but still, fairly long. Especially with two cards missing, which he only had to make (and add) afterwards.

    • @Trumpington1
      @Trumpington1 ปีที่แล้ว +1

      @@liborkundrat185 it’s more involved than this. You’ll see if you try for real…

    • @Trumpington1
      @Trumpington1 ปีที่แล้ว +13

      1. Choose a symbol that links infinity cards eg clown
      2. Pick any card out of those 8 clown cards that will represent rows. From now on, the 7 other ’row symbols’ on that card will be common with the symbols linking each row.
      3. From remaining 47 cards, arrange 1st row of 7 cards to be all cards containing one of those ‘row symbols’
      4. So the same for other rows
      At this stage columns don’t match and you’ll see a couple of blank spots due to having 47 card to fill 7x7
      5. Pick another clown card to represent columns. 7 other symbols on card aside from clown are ‘column symbols’
      6. Keeping the rows intact reposition cards so that each column has common symbol with column card.
      At this stage rows and columns all match up nicely but the main top left to bottom right diagonal probably doesn’t. You can switch any row / column around to make a diagonal but you’ll probably find the parallel diagonal doesn’t match.
      7. Find the main diagonal infinity card by looking for common symbol between lefthand most 2nd row card and top right card.
      Now rearrange grid so that main diagonal matches the common symbol between the top left and one of the other symbol on the diagonal infinity card. Don’t rearrange top 2 rows or left column during this.
      Should be done…!
      Nb for step 1 don’t choose symbol where there are cards missing eg snowman.

    • @liborkundrat185
      @liborkundrat185 ปีที่แล้ว +3

      @@Trumpington1 I see. That's pretty neat, and much more accurate/systematic than I thought.
      Cool for figuring it out.

    • @michielhorikx9863
      @michielhorikx9863 ปีที่แล้ว +1

      @@Trumpington1 This indeed works very nicely, thanks for the algorithm!

  • @biranfalk-dotan2448
    @biranfalk-dotan2448 3 ปีที่แล้ว +109

    Matt is a professional at making #ParkerSquare, the rest of us just Dobble in it

    • @skyjoe55
      @skyjoe55 3 ปีที่แล้ว +3

      Get out!

  • @wolfelkan8183
    @wolfelkan8183 3 ปีที่แล้ว +335

    "Catch the Match" also known as "Make Fun of Your Colorblind Friends"

  • @SquintyGears
    @SquintyGears 3 ปีที่แล้ว +71

    😂 The unintended print of spot the atom had me crying

  • @eboyarski
    @eboyarski 3 ปีที่แล้ว +5

    In 2015, I helped design a similar card game with 73 symbols, 9 on each card, and 73 cards. So, an order of 8=2^3. I used Sage to generate the solution. I never quite understood the math, so I appreciate this video!

  • @F_L_U_X
    @F_L_U_X 3 ปีที่แล้ว +11

    0:04 It also says that the hour-glass is 15 feet tall.

  • @mymoomin0952
    @mymoomin0952 3 ปีที่แล้ว +298

    "I'm not sure if that's genius or lazy"
    The soul of mathematics right there

  • @atomic3691
    @atomic3691 3 ปีที่แล้ว +276

    "Negative six players?" I don't know why, but I couldn't stop laughing.

    • @WesYarber
      @WesYarber 3 ปีที่แล้ว +3

      ‘Twas a good one

    • @pyglik2296
      @pyglik2296 3 ปีที่แล้ว +7

      We should switch to the correct notation [2, 8] ∩ ℤ.

    • @kirkanos771
      @kirkanos771 3 ปีที่แล้ว

      I didnt get that joke either.

    • @ssnoyes
      @ssnoyes 3 ปีที่แล้ว +7

      @@kirkanos771 It's for "2-8" players, which you are supposed to read as "2 through 8" but Matt has interpreted as "2 minus 8".

    • @davidgould9431
      @davidgould9431 3 ปีที่แล้ว +7

      Similar(ish): I finished a jigsaw in 18 months - I was really pleased because it said "2 to 4 years" on the box.

  • @graemed8792
    @graemed8792 3 ปีที่แล้ว +4

    at 3:34 the "slick" genuinly gave me a good chuckle

  • @IllidanS4
    @IllidanS4 2 ปีที่แล้ว +8

    I remember that when learning about projective geometry, the lecturer actually brought this game to the lesson, I think.

  • @jounik
    @jounik 3 ปีที่แล้ว +74

    Next in line: Monomismatch Myriad where you have ~10k cards, each with ~100 symbols, the challenge for each pair being to find the one symbol that is *not* on the other card of the pair.

    • @danielyuan9862
      @danielyuan9862 3 ปีที่แล้ว +3

      that's just n cards with n-1 symbols each such that you take any n-1 symbols of n total symbols.

  • @matheuscastello6554
    @matheuscastello6554 3 ปีที่แล้ว +126

    the fact you printed the first 101 rows on accident is the cherry on top of an already amazing and hilarious video, i loved it hahaha

  • @Hjerta92
    @Hjerta92 3 ปีที่แล้ว +5

    When we were playing Dobble last summer we started wondering about the mathematics behind it, and how many cards you could make with x number of symbols on each card. Our formula was x*x-(x-1), so 8*8-7 in the case of Dobble, although we couldn't have explained exactly how it worked.

  • @adampayton4695
    @adampayton4695 3 ปีที่แล้ว +11

    There's also a second pair! An circle with an arrow inside! However they are different colors so maybe it's also like the "catch the match game"?

    • @annekay281
      @annekay281 3 ปีที่แล้ว +1

      I found the same pair and if color variation was an acceptable option you would not need that many unique symbols or cards that large.

  • @Koisheep
    @Koisheep 3 ปีที่แล้ว +253

    It's so refreshing to find a maths channel that keeps coming up with new topics you didn't know about despite being a phd student lol

    • @SimonBuchanNz
      @SimonBuchanNz 3 ปีที่แล้ว +7

      It's so refreshing to find a maths channel that came up with a subject I *did* already know about! (projective geometry being a big thing in 3d rendering)
      If not something I would ever think to try to apply in this context.

    • @hugofontes5708
      @hugofontes5708 3 ปีที่แล้ว

      @Hopeful Interpretation doesn't take a lot of genius to at least know about trendy or popular topics in your own field that are covered by TH-cam channels for views and popularizing academics, specially when the channel actually surprises you on the regular. Or does it?

  • @a-lien
    @a-lien 3 ปีที่แล้ว +47

    Your mistake getting your cards printed made me really happy, not at the expense of you messing up but at the beauty of how well it ties into what we had just learned and how easy it was to make such a grave mistake

  • @foxylee
    @foxylee 2 ปีที่แล้ว +9

    Finally, I started playing dobble five years ago, and I've asked every math teacher I know to explain it to me since.

  • @breberky
    @breberky ปีที่แล้ว +10

    After spending many weeks trying to code the Dobble generating algorithm (brute force with a lot of optimization tricks, still running for long hours), the existence of the cyclic difference set literally blew my mind. Now the job is done in a second. You have saved my day! Thank you!

  • @n8r8rutube
    @n8r8rutube 3 ปีที่แล้ว +86

    You really Parker Squared that print job :P

  • @CBWP
    @CBWP 3 ปีที่แล้ว +105

    "You can trick young people into becoming engineers." - Matt Parker

  • @NoomiSense
    @NoomiSense 3 ปีที่แล้ว +11

    haha, this was amazing! You should challenge Steve to discover the most efficient way of spotting the symbol on the Myriad cards. Would a sorting methodology work best here? like a 'shell-spot' or a 'quick-spot'? Or is our brain more attuned to focusing on a single colour at the time? I went through so many spotting-tactics and I couldn't even see the happy house. When I realised that the this game was so hard that the YT algorithm couldn't even spot the *leaf* I decided to un-pause the video.

  • @reneejones6330
    @reneejones6330 2 ปีที่แล้ว +1

    "Spot the happy little house" is MY kind of matching game. Love it!

  • @afonsoferreira5171
    @afonsoferreira5171 3 ปีที่แล้ว +184

    The Parker Dobble
    edit: just refreshed the comments, good to know everyone thought the same

    • @zozzy4630
      @zozzy4630 3 ปีที่แล้ว +5

      Parker Pentagon!

    • @rossradtke
      @rossradtke 3 ปีที่แล้ว +5

      I was gonna say its an upgrade from the Parker Square...
      ..."Now with FIVE sides

  • @anushrao882
    @anushrao882 3 ปีที่แล้ว +75

    That negative six got me laughing way more than it should have.

    • @luiscarlosqg
      @luiscarlosqg 3 ปีที่แล้ว

      Yeah, that was funny.

  • @dfgaJK
    @dfgaJK 3 ปีที่แล้ว +3

    What made finding the happy little house, it took me about 2min, is that the contrast/saturation is sightly diffrent. (or at least it steamed to be in the image of you holding them up.)

  • @dsblocks
    @dsblocks 3 ปีที่แล้ว +1

    you: double dobble
    me, an intellectual: quadrobble

  • @dahemac
    @dahemac 3 ปีที่แล้ว +132

    I love that you have probably persuaded a renowned solar physicist to periodically throw game packages at, or to, or past you. 😁

    • @benjaminsmith3625
      @benjaminsmith3625 3 ปีที่แล้ว +48

      Physicists are big fans of particle accelerators after all!

    • @wellshit9489
      @wellshit9489 3 ปีที่แล้ว +9

      They need to test how the velocity, time and mass affect the results obviously.

    • @vigilantcosmicpenguin8721
      @vigilantcosmicpenguin8721 3 ปีที่แล้ว +1

      I prefer believing they actually teleported on screen on their own.

  • @DannyGottawa
    @DannyGottawa 3 ปีที่แล้ว +199

    Paraphrased Matt: 'Just make the two extra cards yourself.'
    Couldn't I just make them all?
    Nervous Matt: Shhh

    • @PauxloE
      @PauxloE 3 ปีที่แล้ว +15

      There are dobble/spot-it generators on the internet. Upload a set of icons (use your own ones so there are no copyright issues), get the cards, print them. My wife made some with fruits and vegetables.

  • @jordanrivera467
    @jordanrivera467 ปีที่แล้ว +1

    Funnily enough, I first played this game during a free day in math class, truly coming full circle with this video

  • @captainstroon1555
    @captainstroon1555 2 ปีที่แล้ว

    You just earned a sub by printing out 10302 unique symbols and 101 happy little houses.

  • @MisterNohbdy
    @MisterNohbdy 3 ปีที่แล้ว +47

    *points to box* "These guys sponsored me! They're great!" *promptly tosses box onto floor*

  • @Iwasneverevenhere
    @Iwasneverevenhere 3 ปีที่แล้ว +20

    Regarding the number cards, German math TH-camr Dorfuchs also made a video on this game.
    In it, he contacted the company to ask about the number of cards, and they answered that it simply had to do with printing, although I don't remember the details.

    • @Ulkomaalainen
      @Ulkomaalainen 3 ปีที่แล้ว +5

      The game company said the printers only could do 55 (well, or 110 with 53 thrown out). Why that is wasn't solved but it was also the suggestion that it is was Poker sets (or, more broadly, the standard 52 cards plus three anything - joker cards for example).

    • @ultimatedude5686
      @ultimatedude5686 3 ปีที่แล้ว +3

      @@Ulkomaalainen My guess it that it was the 52 cards, two jokers, and that extra card they always include for branding

  • @myrusEW
    @myrusEW 9 หลายเดือนก่อน

    This sounds like an EXCELLENT programming challenge.

  • @NicholasA231
    @NicholasA231 3 ปีที่แล้ว +2

    I put off watching this video until I had half an hour. There was no disclaimer about setting aside 8 extra minutes to find the matching damn houses.

  • @toughnerd
    @toughnerd 3 ปีที่แล้ว +48

    I never thought a pentagon could be classified as a square before...
    But those pentagons are the parker's square of monomatching games.

    • @Jordan-zk2wd
      @Jordan-zk2wd 3 ปีที่แล้ว +2

      About that... th-cam.com/video/n7GYYerlQWs/w-d-xo.html : P

  • @y.h.w.h.
    @y.h.w.h. 3 ปีที่แล้ว +22

    "I've become quite good at this..."
    Oh no. Something went wrong.

  • @ethanlivemere1162
    @ethanlivemere1162 6 หลายเดือนก่อน

    Years ago, I counted how many times every symbol appeared. Most were 7 or 8, but the snowman only appears 6 times. I'm glad I finally know why - it's because there's 2 cards missing from the snowman line.

  • @ChristianBehnke
    @ChristianBehnke ปีที่แล้ว

    "Spot the happy little house" is my favourite new game! 😂

  • @michaeledinger8256
    @michaeledinger8256 3 ปีที่แล้ว +56

    From the producers of Parkers Square: Parkers Pentagon.
    Laugh so hard that I cried

  • @DAveShillito
    @DAveShillito 3 ปีที่แล้ว +116

    Literally everybody watched this video and looked to the comments to see if they would be the first to post "Parker Dobble" :D

    • @ryjtse
      @ryjtse 3 ปีที่แล้ว

      Oh now that is delightful.

    • @Nosirrbro
      @Nosirrbro 3 ปีที่แล้ว +1

      Parker Match!

    • @esotericVideos
      @esotericVideos 3 ปีที่แล้ว +2

      I think Parker pentagon is more apt. It suggests that with time Matt will find a way to embarrass himself with all regular polygons.

    • @better.better
      @better.better 3 ปีที่แล้ว

      Parker Plane... Parker Dobble is just ridiculous! personally I feel that the concept of a Parker plane being an infinite sequence of happy houses is very comforting

    •  3 ปีที่แล้ว +1

      Nope, I went on to check who else found the smiling house.
      EDIT: ...and I unpaused the video and learned the truth :D :D

  • @samp-w7439
    @samp-w7439 2 ปีที่แล้ว +6

    I watched this a while back, wanted to generate my own dobble (for reasons which I won't go in to). I recall Matt saying cyclic difference sets are hard to generate, so I decided I would try to write some code for it. It's a simple recursive backtracking algorithm, not much fanciness. Wrote it in python and here it is:
    def check(nums, target):
    differences = 0
    ind_diffs = set()
    mod = target * target - target + 1
    for n1 in nums:
    for n2 in nums:
    diff = n1 - n2
    diff = (diff + mod) % mod
    if diff:
    differences += 1
    ind_diffs.add(diff)
    return len(ind_diffs) == differences
    def generate(target, current=None):
    current = current or [0]
    mod = target * target - target + 1
    options = range(current[-1] + 1, mod)
    if check(current, target):
    if len(current) == target:
    return current
    for option in options:
    res = generate(target, current + [option])
    if res:
    return res
    print(generate(8))
    The code is surprisingly fast for small sizes of difference sets, but, I tried generating the length-102 set that you would need to generate Monomatch: Myriad, and it still hasn't finished running (over an hour). This makes sense, as recursive backtracking scales quite poorly (I think O(n!)), so I'm not surprised. In any case, I just wanted to share my findings. Cheers!

  • @AaronZull
    @AaronZull 2 ปีที่แล้ว +1

    I have been waiting for this exact TH-camr to make this exact video for several years now! Thank you!

  • @Xanthaar
    @Xanthaar 3 ปีที่แล้ว +27

    Outdone the Parker square with this one. I'm crying with laughter at the happy little houses on all the cards :)

    • @bluecat2991
      @bluecat2991 3 ปีที่แล้ว

      So am I. It's so Matt.

    • @johncavanaugh3960
      @johncavanaugh3960 3 ปีที่แล้ว

      Lol that's a bold statement: "outdone the parker square"

  • @jubnx2781
    @jubnx2781 3 ปีที่แล้ว +39

    I literally was wondering about this 2 years ago and still now today because we played this at the lake, I now know. Thx

  • @calebj5852
    @calebj5852 3 ปีที่แล้ว +1

    I wondered about this when my family played over the holidays this past year! Thanks for the explanation!

  • @JojoStyle_
    @JojoStyle_ 3 ปีที่แล้ว +21

    The reason why there are only 55 instead of 57 cards in the deck is simply, that the printing firm which printed the cards used sheets of paper with 55 stencils in each.

    • @pierrestober3423
      @pierrestober3423 3 ปีที่แล้ว +6

      Normal playing cards usually have 55 cards in them, 52+2 jokers +1 rules card or 52+3 jokers. I figure that might have something to do with it.

    • @JojoStyle_
      @JojoStyle_ 3 ปีที่แล้ว +4

      @@pierrestober3423 I actually called the manufacturing firm here in Germany and asked them :D Note sure why they have sheets with "only" 55 stencils on them tho

    • @Kamikater2
      @Kamikater2 3 ปีที่แล้ว +4

      @@JojoStyle_ thought something like that because 57 is 3*19 pretty bad for layouting, but 55 with 5*11 is quite a bit better. Same goes for the 31 cards 1*31 (prime!) and 5*6 for the 30 cards of the childs version.

    • @haulin
      @haulin 3 ปีที่แล้ว +1

      I thought it might have something to do with patents. I wouldn't be surprised if someone patented a method of placing 57 symbols on 57 cards, and doing 55 might just be different enough.

    • @ConstantinErckenbrecht
      @ConstantinErckenbrecht 3 ปีที่แล้ว +1

      @@pierrestober3423 regular playing cards are actually printed on 7x8 = 56 card sheets. If you google for uncut playing card sheet you can find some pictures.

  • @TacoMaster3211
    @TacoMaster3211 3 ปีที่แล้ว +29

    The Happy Little House Incident must make it into Humble Pi 2, or maybe Humble Tau if you wish.

    • @thegreatsalad
      @thegreatsalad 3 ปีที่แล้ว +5

      Humble Tau, love it haha

    • @frederf3227
      @frederf3227 3 ปีที่แล้ว +2

      Im holding out for for Humble 540 degrees.

    • @vigilantcosmicpenguin8721
      @vigilantcosmicpenguin8721 3 ปีที่แล้ว +2

      Something about that book will come full circle.

  • @jasonrubik
    @jasonrubik 3 ปีที่แล้ว +82

    Next road trip :
    Dad: I spy with my little eye, an atom !!!
    Kid : At least its not the scary clown !
    Dad : He's too far away, I can't see him yet !
    Edit. just finished the video... its one of the funniest ever from Matt !

  • @cl3m3n7
    @cl3m3n7 3 ปีที่แล้ว +3

    This was an amazing video ! Great cinematography, really fun and the math is incredible !

  • @driesvanoosten4417
    @driesvanoosten4417 3 ปีที่แล้ว +2

    My daughter likes to play dobble with three cards. The players then have to call out the three pairs connecting them. Ofcourse, it can happen that the same symbol occurs in all three cards, which can be quite hard to spot.

  • @somefreshbread
    @somefreshbread 3 ปีที่แล้ว +95

    "Friends of mine who have procreated"
    Yep. This is a math channel.

    • @Ulkomaalainen
      @Ulkomaalainen 3 ปีที่แล้ว +8

      Possible. Ehm, what is this "friends of mine" thing?

  • @RubenCeuppensOfficial
    @RubenCeuppensOfficial 3 ปีที่แล้ว +65

    Steve's face at the end when he realises, is hilarious.

    • @nitehawk86
      @nitehawk86 3 ปีที่แล้ว +8

      The face of someone that isn't sure if they are being trolled.

  • @hapticflapjack
    @hapticflapjack 3 ปีที่แล้ว +1

    The thrower should get a credit. (And the filming location looks lovely too.)

  • @andyland00
    @andyland00 3 ปีที่แล้ว +28

    Great video! As an engineering student, however, my inner manufacturer is pained by the fact that you chose to make your myriad out of pentagons rather than hexagons... hopefully there was some printing size limit that made the difference in wastage between the two shapes negligible?

    • @mgarratt101
      @mgarratt101 2 ปีที่แล้ว +3

      It makes zero difference, obviously you're a beginner engineering student, you'll get there one day

    • @paulbockmann8402
      @paulbockmann8402 2 ปีที่แล้ว +9

      @@mgarratt101 seems like you’re the beginner, only triangles, squares and hexagons can tile a plane without any overlap or gaps. You’ll get there one day ;)

    • @iteragami5078
      @iteragami5078 2 ปีที่แล้ว +3

      Good question. It would depend on the size of the polygon compared to the roll of paper to be printed on. Cause while regular hexagons do tile the plane perfectly, they leave jagged edges at the border, so you would compare wastage to densest pentagon packing known.

    • @SlashCrash_Studios
      @SlashCrash_Studios ปีที่แล้ว +1

      He's Matt Parker, Pentagons are just cooler shapes

    • @AidanRahder
      @AidanRahder ปีที่แล้ว +2

      @@SlashCrash_Studios Hexagons are the bestagons.

  • @thekinglydragon
    @thekinglydragon 3 ปีที่แล้ว +11

    I will be using that -6 players joke for the rest of my life. I have no idea how I've never heard it before. Thank you for enlightening me

  • @garrettthompson3286
    @garrettthompson3286 3 ปีที่แล้ว +25

    5:55 I was fully ready for a surprise diagonalization argument like Cantor's

  • @F_L_U_X
    @F_L_U_X 3 ปีที่แล้ว +3

    6:53 Imagine a mechanical lock needing that many pins to align to unlock.

  • @PanduPoluan
    @PanduPoluan 2 ปีที่แล้ว +2

    I totally lost it looking at Steve's face while he tried to find the match... then again when he realized it was all "smiley house" 🤣🤣🤣

  • @HeVi7
    @HeVi7 3 ปีที่แล้ว +22

    That's a Parker Square of a game you've printed there 🤔

  • @richardwithanarr
    @richardwithanarr 3 ปีที่แล้ว +19

    I like how Matt frames himself sitting in front of the circle artwork behind him.
    Santino Parker, patron de numeros calculadores

  • @user-dn5bx2iu3e
    @user-dn5bx2iu3e 2 ปีที่แล้ว

    Steves joy while playing the game, having a little snack, taking a sip. moments later; "what? smiley house, smiley house?"

  • @dcornect53
    @dcornect53 ปีที่แล้ว

    It started with "what is the dobble maths?" and became "Here is our Frankenstein dobble." with an implied maniacal laugh.

  • @reformCopyright
    @reformCopyright 3 ปีที่แล้ว +7

    "Let n be an integer!"
    And the crowd goes wild!

  • @ulf-nicklassdegenhardt-mei3121
    @ulf-nicklassdegenhardt-mei3121 3 ปีที่แล้ว +3

    Probably the reason for 55 cards vs. 57 cards is just a question of optimizing the production process. The cards are round. Therefore you can nicely arrange them in 11 rows a 5 cards using hexagonal packing, and you get a good sized rectangular print sheet without wasting paper. Maybe 3x19 was harder to handle?

  • @bwah9481
    @bwah9481 2 ปีที่แล้ว +1

    I played this game a bunch of board game arena and it boggles me how there was ALWAYS a match despite there being so many symbols.

  • @fathermahler1078
    @fathermahler1078 ปีที่แล้ว

    I love how sometimes the silhouette of his torso turns into a square sometimes

  • @jaymoney5090
    @jaymoney5090 3 ปีที่แล้ว +38

    28:25 "They're all smiley house"
    Always have been

  • @snipperjoey1151
    @snipperjoey1151 3 ปีที่แล้ว +26

    Honestly I'm proud I spotted the little house in about a minute.

    • @miriamrosemary9110
      @miriamrosemary9110 3 ปีที่แล้ว

      I looked for quite a while and couldn't find it. Good job!

    •  3 ปีที่แล้ว +2

      Likewise, I found it in a minute or two. But it could have taken a lot longer, it was just luck.
      EDIT: ...and I unpaused the video and learned the truth :D :D

    • @vigilantcosmicpenguin8721
      @vigilantcosmicpenguin8721 3 ปีที่แล้ว

      I think the trick was to search through each color.

  • @JBJFX
    @JBJFX 2 ปีที่แล้ว +1

    Found the house as quickly as he did. My apotheosis has begun