Answers.Body: <p><em>This answer is based upon the <strong>wrong</strong> assumption that <a href="http://www.bricklink.com/v2/catalog/catalogitem.page?O=9852-1" rel="nofollow noreferrer">Technic chain links and conveyor-belt links (a.k.a. bulldozer chain links)</a> connect to nothing except each other.
  As remarked by <a href="https://bricks.stackexchange.com/questions/7970/chaining-connections/8200?noredirect=1#comment15519_8200">Ivan Sanchez</a>, this is contradicted by <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?S=40175-1" rel="nofollow noreferrer">this set</a>, which uses a connection between a conveyor-belt link and a <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=88072" rel="nofollow noreferrer">standard arm/rod</a>.</em></p>
  
  <p>Assuming that these chain links only connect to each other, the only way to connect them to something else, is wrapping eight of them around a standard <a href="http://www.bricklink.com/v2/catalog/catalogitem.page?P=4019" rel="nofollow noreferrer">16-cog gear</a>. (You can also wrap six of them around an <a href="http://www.bricklink.com/v2/catalog/catalogitem.page?P=3647" rel="nofollow noreferrer">8-cog gear</a>, but I would not consider that a robust and intended connection.)</p>
  
  <p>Finally, the gear can be connected to a <a href="http://www.bricklink.com/v2/catalog/catalogitem.page?P=6587" rel="nofollow noreferrer">length-3 axle with stud</a>, which in turn can be connected to the bottom of the 2×4 brick.</p>
  
  <p>For bulldozer chain links, this looks like this:</p>
  
  <p><a href="https://i.sstatic.net/hvf3b.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/hvf3b.jpg" alt="Parts"></a></p>
  
  <p><a href="https://i.sstatic.net/pe8d7.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/pe8d7.jpg" alt="Construction"></a></p>
  
  <p>Now, it depends on how you interpret the challenge: You need <strong>nine</strong> other pieces to connect the chain link to the 2×4 brick. However, many of those pieces are again chain links and there are only <strong>two</strong> pieces between every chain link and the 2×4 brick.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2016-11-13T03:52:40.090Z
Answers.Text: I'm terribly tempted to give it to you... I'm just trying to figure out whether connecting those links to standard rods is legal. If it is, a [1x4 antenna](https://www.bricklink.com/v2/catalog/catalogitem.page?P=3957#T=C) drops the chain down to one link.
Answers.UserDisplayName: Lepidolite Mica
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-01T22:09:52.037Z
Answers.Text: I think you can also actually clip them to one of the various thin antenna pieces like [2569](https://www.bricklink.com/v2/catalog/catalogitem.page?id=153), although I would assume that's not a "legal" connection.
Answers.UserDisplayName: Alexander O'Mara
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-06T00:59:57.247Z
Answers.Text: Couldn't you use a [88072 Plate, Modified 1 x 2 with Arm Up](https://www.bricklink.com/v2/catalog/catalogitem.page?P=88072&idColor=11) to connect the thread to the brick? I think [40175-1 Policeman with Cookie and Stinger polybag](https://www.bricklink.com/v2/catalog/catalogitem.page?S=40175-1) is using that technique.
Answers.UserDisplayName: IvanSanchez
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-06T09:34:52.040Z
Answers.Text: @IvanSanchez: That’s what Lepidolite Mica suggested in the first comment, leaving the question whether it was a legal connection, which the set you reference answers. See my edit. (At least that set is younger than my answer.)
Answers.UserDisplayName: Wrzlprmft
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2016-11-12T11:26:16.730Z
Answers.LastActivityDate: 2020-01-06T09:33:33.657Z
Answers.LastEditDate: 2020-01-06T09:33:33.657Z
Answers.UserDisplayName: Wrzlprmft
Answers.Body: <p>I have another case for 4 connections.
  <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=18592#T=C" rel="nofollow noreferrer">18592</a> - Propeller 3 Blade 13 Diameter (Ninjago Airjitzu Flyer Vortex Rotor), can be attached to 2 x 4 brick with a help of following 3 parts below:</p>
  
  <ul>
  <li><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=18590#T=C&amp;C=11" rel="nofollow noreferrer">18590</a> - Technic, Gear 8 Tooth with Pin Holes and Ninjago
  Flywheel Socket - Short Shaft </li>
  <li><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=18585#T=C&amp;C=11" rel="nofollow noreferrer">18585</a> - Brick, Modified 2 x 4 with Pin Holes and
  Flywheel Socket (Ninjago Airjitzu Flyer Handle) </li>
  <li><a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=16965#T=C" rel="nofollow noreferrer">16965</a> - Human
  Tool, Rip Cord Flexible with Handle Thick for Ninjago Airjitzu Flyers</li>
  </ul>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-01T22:16:55.243Z
Answers.Text: I could do it with 2 pieces, [6558 Pin 3L](https://www.bricklink.com/v2/catalog/catalogitem.page?P=6558) and [2444 Plate, Modified 2 x 2 with Pin Hole](https://www.bricklink.com/v2/catalog/catalogitem.page?P=2444). Or maybe even 1 [15461 piece](https://www.bricklink.com/v2/catalog/catalogitem.page?P=15461) if putting a stud in the pin hole is allowed.
Answers.UserDisplayName: Alexander O'Mara
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-02T07:20:47.970Z
Answers.Text: None of these parts provide a connection and I would consider them cheating similar to using gravity to call it "zero piece solution", rubber bands or string with studs on both ends to call it "single piece solution".
Answers.UserDisplayName: Alex
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-02T07:24:28.950Z
Answers.Text: Sorry, I forgot to list the black circular piece that connects to the propeller. Those pieces would connect to that piece and hold the propeller in place. I've done something similar to attach it to an axel before.
Answers.UserDisplayName: Alexander O'Mara
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-02T07:41:52.620Z
Answers.Text: In any case, my suggestions probably aren't 'legal' so this isn't a bad answer.
Answers.UserDisplayName: Alexander O'Mara
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-02T07:43:16.660Z
Answers.Text: If I understand correctly, your solution is targeted to be applied on top of 18590 piece, where Trans-Clear cone is used to be attached in a set. I cannot see how such solution could be applied from the bottom of the propeller. Or am i missing something? In such case propeller would only hold if notches within propeller wouldn't align with cuts on 18590 part. Otherwise the propeller would fall off. So a bit of grey area here, as luck is now involved here.
Answers.UserDisplayName: Alex
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-02T18:22:11.497Z
Answers.Text: Sort-of, although after some testing, it's still possible to spin the propeller and detach it... [I found little bit different way to do it in 3 pieces though](https://i.imgur.com/8WLhzRx.jpg). And [a really goofy piece which can do it in 2](https://i.imgur.com/WmRwLfW.jpg) ([this piece](https://www.bricklink.com/v2/catalog/catalogitem.page?P=4318) which has been attached to a Technic pin hole in [Polar Base](https://brickset.com/sets/6575-1/Polar-Base)).
Answers.UserDisplayName: Alexander O'Mara
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-01T16:34:52.653Z
Answers.LastActivityDate: 2020-01-02T07:31:09.147Z
Answers.LastEditDate: 2020-01-02T07:31:09.147Z
Answers.UserDisplayName: Alex
Answers.Body: <p>Are you counting sub-assemblies as separate pieces? </p>
  
  <p>How about part <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?id=1761" rel="nofollow noreferrer">983</a> a Minifigure hand.</p>
  
  <p>That requires 981 Arm, 973 Torso, 970 Hips, and 971 a Leg.</p>
  
  <p>For a minimum total of <strong>four interconnections</strong>.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-01T21:48:00.287Z
Answers.Text: ...you really don't need any connecting pieces to attach a minifig hand to a brick...
Answers.UserDisplayName: Alexander O'Mara
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-02T07:27:16.663Z
Answers.Text: Minifigure hand can have any piece with 3.18 mm bar attached. You can then use any part which has both 3.18 mm bar and stud (or anti stud) to get hand attached to 2 x 4 brick. For example, Bar 1L with 1 x 1 Round Plate with Hollow Stud (32828) can be attached in two ways (with stud and anti-stud). This would bring it to just two connections.
Answers.UserDisplayName: Alex
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-02T07:47:02.687Z
Answers.Text: Actually, ignore my suggestion above. Minifigure hand has a stud itself! This means it can be attached directly to 2 x 4 brick's anti-stud on the bottom.
Answers.UserDisplayName: Alex
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-12-31T23:05:22.490Z
Answers.LastActivityDate: 2019-12-31T23:05:22.490Z
Answers.UserDisplayName: David
Answers.Body: <p>Maybe one of the LEGO storage systems (<a href="https://www.lego.com/en-us/product/lego-8-stud-black-storage-brick-drawer-5005718" rel="nofollow noreferrer">https://www.lego.com/en-us/product/lego-8-stud-black-storage-brick-drawer-5005718</a>) or apparel could be a candidate?</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-01-01T00:58:41.823Z
Answers.LastActivityDate: 2020-01-01T00:58:41.823Z
Answers.UserDisplayName: technicguy1
Body: <p>The LEGO <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=3001#T=C" rel="noreferrer">2x4 brick</a> is somewhat of an icon of LEGO, and the majority of official LEGO bricks can connect back to it. However, the number of bridging bricks required can vary, depending on the piece. Some pieces, like a <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=98138#T=C" rel="noreferrer">1x1 Round Tile</a>, can be connected directly to it; however, others, like the <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=50450#T=C" rel="noreferrer">Technic Axle 32</a>, require additional pieces (in this case, the <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=32064" rel="noreferrer">Technic Brick 1 x 2 with Axle Hole</a>) to bridge the gap.</p>
  
  <p>The piece I can think of that requires the most of said bridging pieces to connect back to a 2x4 is the body of the <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?G=42718c01#T=C" rel="noreferrer">Bohrok Canister assembly</a>, which requires 4 pieces to reach the 2x4: the lid, the hanger clip, a <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=41665#T=C" rel="noreferrer">Bohrok ribcage</a>, and a <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=2458#T=C" rel="noreferrer">1x2 Brick With Pin</a>. My challenge is, can you do me one better? What piece takes the most bridging pieces to connect back to a standard 2x4, and what is the chain required for it?</p>
  
  <p>Rules:</p>
  
  <ul>
  <li>The piece must be official LEGO; no messing around with off-brand pieces with absurd new connection types.</li>
  <li>All connections used must be legal; no strapping things together with rubber bands and calling it good (that would take all the fun out of it).</li>
  <li>There must actually be a method of connecting the pieces together; pieces like the <a href="https://www.bricklink.com/v2/catalog/catalogitem.page?P=41250#T=C" rel="noreferrer">ball</a> used in <a href="http://www.bricklink.com/v2/catalog/catalogitem.page?S=7418-1#T=S&amp;O=%7B%7D" rel="noreferrer">Scorpion Palace</a> or any of the BIONICLE canisters without built-in studs are just cheating.</li>
  </ul>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-08-17T23:40:30.053Z
Comments.Text: This might actually be a good puzzle for Puzzling.SE, but you already posted it here, so.
Comments.UserDisplayName: SMS von der Tann
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-09-16T00:05:04.287Z
Comments.Text: This is a nice break from the usual "what is this obscure part" -- no problem with this IMHO.
Comments.UserDisplayName: Mark Stewart
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-11-12T11:29:47.390Z
Comments.Text: I suggest that you post your best solution as a separate answer (possibly with pictures), so it can be separately commented and voted upon.
Comments.UserDisplayName: Wrzlprmft
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2016-11-21T03:15:51.483Z
Comments.Text: @Wrzlprmft Sadly, I no longer have any of the original Bohrok canisters. However, physical construction of the winning chain isn't necessarily a requirement; this is more a parts knowledge test than a supply one.
Comments.UserDisplayName: Lepidolite Mica
Tags: <challenge>
Title: Chaining Connections
UserDisplayName: Lepidolite Mica
ThreadText: # Chaining Connections
  
  (Asked by: username_0 on 2016-08-14)
  
  The LEGO [2x4 brick](https://www.bricklink.com/v2/catalog/catalogitem.page?P=3001#T=C) is somewhat of an icon of LEGO, and the majority of official LEGO bricks can connect back to it. However, the number of bridging bricks required can vary, depending on the piece. Some pieces, like a [1x1 Round Tile](https://www.bricklink.com/v2/catalog/catalogitem.page?P=98138#T=C), can be connected directly to it; however, others, like the [Technic Axle 32](https://www.bricklink.com/v2/catalog/catalogitem.page?P=50450#T=C), require additional pieces (in this case, the [Technic Brick 1 x 2 with Axle Hole](https://www.bricklink.com/v2/catalog/catalogitem.page?P=32064)) to bridge the gap.
  
  The piece I can think of that requires the most of said bridging pieces to connect back to a 2x4 is the body of the [Bohrok Canister assembly](https://www.bricklink.com/v2/catalog/catalogitem.page?G=42718c01#T=C), which requires 4 pieces to reach the 2x4: the lid, the hanger clip, a [Bohrok ribcage](https://www.bricklink.com/v2/catalog/catalogitem.page?P=41665#T=C), and a [1x2 Brick With Pin](https://www.bricklink.com/v2/catalog/catalogitem.page?P=2458#T=C). My challenge is, can you do me one better? What piece takes the most bridging pieces to connect back to a standard 2x4, and what is the chain required for it?
  
  Rules:
  
  * The piece must be official LEGO; no messing around with off-brand pieces with absurd new connection types.
  * All connections used must be legal; no strapping things together with rubber bands and calling it good (that would take all the fun out of it).
  * There must actually be a method of connecting the pieces together; pieces like the [ball](https://www.bricklink.com/v2/catalog/catalogitem.page?P=41250#T=C) used in [Scorpion Palace](http://www.bricklink.com/v2/catalog/catalogitem.page?S=7418-1#T=S&O=%7B%7D) or any of the BIONICLE canisters without built-in studs are just cheating.
  
  **Tags:** challenge
  > **Comments:**
  > **username_1**: This might actually be a good puzzle for Puzzling.SE, but you already posted it here, so.  
  > **username_2**: This is a nice break from the usual "what is this obscure part" -- no problem with this IMHO.  
  > **username_3**: I suggest that you post your best solution as a separate answer (possibly with pictures), so it can be separately commented and voted upon.  
  > **username_0**: @Wrzlprmft Sadly, I no longer have any of the original Bohrok canisters. However, physical construction of the winning chain isn't necessarily a requirement; this is more a parts knowledge test than a supply one.  
  
  ---
  
  ## 4 answers
  
  ### Answer by username_3 on 2016-11-12. Score: 6
  
  *This answer is based upon the **wrong** assumption that [Technic chain links and conveyor-belt links (a.k.a. bulldozer chain links)](http://www.bricklink.com/v2/catalog/catalogitem.page?O=9852-1) connect to nothing except each other.
  As remarked by [Ivan Sanchez](https://bricks.stackexchange.com/questions/7970/chaining-connections/8200?noredirect=1#comment15519_8200), this is contradicted by [this set](https://www.bricklink.com/v2/catalog/catalogitem.page?S=40175-1), which uses a connection between a conveyor-belt link and a [standard arm/rod](https://www.bricklink.com/v2/catalog/catalogitem.page?P=88072).*
  
  Assuming that these chain links only connect to each other, the only way to connect them to something else, is wrapping eight of them around a standard [16-cog gear](http://www.bricklink.com/v2/catalog/catalogitem.page?P=4019). (You can also wrap six of them around an [8-cog gear](http://www.bricklink.com/v2/catalog/catalogitem.page?P=3647), but I would not consider that a robust and intended connection.)
  
  Finally, the gear can be connected to a [length-3 axle with stud](http://www.bricklink.com/v2/catalog/catalogitem.page?P=6587), which in turn can be connected to the bottom of the 2×4 brick.
  
  For bulldozer chain links, this looks like this:
  
  [![Parts](https://i.sstatic.net/hvf3b.jpg)](https://i.sstatic.net/hvf3b.jpg)
  
  [![Construction](https://i.sstatic.net/pe8d7.jpg)](https://i.sstatic.net/pe8d7.jpg)
  
  Now, it depends on how you interpret the challenge: You need **nine** other pieces to connect the chain link to the 2×4 brick. However, many of those pieces are again chain links and there are only **two** pieces between every chain link and the 2×4 brick.
  
  > **Comments:**
  > **username_0**: I'm terribly tempted to give it to you... I'm just trying to figure out whether connecting those links to standard rods is legal. If it is, a [1x4 antenna](https://www.bricklink.com/v2/catalog/catalogitem.page?P=3957#T=C) drops the chain down to one link.  
  > **username_4**: I think you can also actually clip them to one of the various thin antenna pieces like [2569](https://www.bricklink.com/v2/catalog/catalogitem.page?id=153), although I would assume that's not a "legal" connection.  
  > **username_5**: Couldn't you use a [88072 Plate, Modified 1 x 2 with Arm Up](https://www.bricklink.com/v2/catalog/catalogitem.page?P=88072&idColor=11) to connect the thread to the brick? I think [40175-1 Policeman with Cookie and Stinger polybag](https://www.bricklink.com/v2/catalog/catalogitem.page?S=40175-1) is using that technique.  
  > **username_3**: @IvanSanchez: That’s what Lepidolite Mica suggested in the first comment, leaving the question whether it was a legal connection, which the set you reference answers. See my edit. (At least that set is younger than my answer.)  
  
  ---
  
  ### Answer by username_6 on 2020-01-01. Score: 4
  
  I have another case for 4 connections.
  [18592](https://www.bricklink.com/v2/catalog/catalogitem.page?P=18592#T=C) - Propeller 3 Blade 13 Diameter (Ninjago Airjitzu Flyer Vortex Rotor), can be attached to 2 x 4 brick with a help of following 3 parts below:
  
  * [18590](https://www.bricklink.com/v2/catalog/catalogitem.page?P=18590#T=C&C=11) - Technic, Gear 8 Tooth with Pin Holes and Ninjago
    Flywheel Socket - Short Shaft
  * [18585](https://www.bricklink.com/v2/catalog/catalogitem.page?P=18585#T=C&C=11) - Brick, Modified 2 x 4 with Pin Holes and
    Flywheel Socket (Ninjago Airjitzu Flyer Handle)
  * [16965](https://www.bricklink.com/v2/catalog/catalogitem.page?P=16965#T=C) - Human
    Tool, Rip Cord Flexible with Handle Thick for Ninjago Airjitzu Flyers
  
  > **Comments:**
  > **username_4**: I could do it with 2 pieces, [6558 Pin 3L](https://www.bricklink.com/v2/catalog/catalogitem.page?P=6558) and [2444 Plate, Modified 2 x 2 with Pin Hole](https://www.bricklink.com/v2/catalog/catalogitem.page?P=2444). Or maybe even 1 [15461 piece](https://www.bricklink.com/v2/catalog/catalogitem.page?P=15461) if putting a stud in the pin hole is allowed.  
  > **username_6**: None of these parts provide a connection and I would consider them cheating similar to using gravity to call it "zero piece solution", rubber bands or string with studs on both ends to call it "single piece solution".  
  > **username_4**: Sorry, I forgot to list the black circular piece that connects to the propeller. Those pieces would connect to that piece and hold the propeller in place. I've done something similar to attach it to an axel before.  
  > **username_4**: In any case, my suggestions probably aren't 'legal' so this isn't a bad answer.  
  > **username_6**: If I understand correctly, your solution is targeted to be applied on top of 18590 piece, where Trans-Clear cone is used to be attached in a set. I cannot see how such solution could be applied from the bottom of the propeller. Or am i missing something? In such case propeller would only hold if notches within propeller wouldn't align with cuts on 18590 part. Otherwise the propeller would fall off. So a bit of grey area here, as luck is now involved here.  
  > **username_4**: Sort-of, although after some testing, it's still possible to spin the propeller and detach it... [I found little bit different way to do it in 3 pieces though](https://i.imgur.com/8WLhzRx.jpg). And [a really goofy piece which can do it in 2](https://i.imgur.com/WmRwLfW.jpg) ([this piece](https://www.bricklink.com/v2/catalog/catalogitem.page?P=4318) which has been attached to a Technic pin hole in [Polar Base](https://brickset.com/sets/6575-1/Polar-Base)).  
  
  ---
  
  ### Answer by username_7 on 2019-12-31. Score: 3
  
  Are you counting sub-assemblies as separate pieces?
  
  How about part [983](https://www.bricklink.com/v2/catalog/catalogitem.page?id=1761) a Minifigure hand.
  
  That requires 981 Arm, 973 Torso, 970 Hips, and 971 a Leg.
  
  For a minimum total of **four interconnections**.
  
  > **Comments:**
  > **username_4**: ...you really don't need any connecting pieces to attach a minifig hand to a brick...  
  > **username_6**: Minifigure hand can have any piece with 3.18 mm bar attached. You can then use any part which has both 3.18 mm bar and stud (or anti stud) to get hand attached to 2 x 4 brick. For example, Bar 1L with 1 x 1 Round Plate with Hollow Stud (32828) can be attached in two ways (with stud and anti-stud). This would bring it to just two connections.  
  > **username_6**: Actually, ignore my suggestion above. Minifigure hand has a stud itself! This means it can be attached directly to 2 x 4 brick's anti-stud on the bottom.  
  
  ---
  
  ### Answer by username_8 on 2020-01-01. Score: 2
  
  Maybe one of the LEGO storage systems (<https://www.lego.com/en-us/product/lego-8-stud-black-storage-brick-drawer-5005718>) or apparel could be a candidate?
  
  
  ---
  
  