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Towers of Hanoi

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Project by dansnow posted 12-08-2014 12:48 AM 1426 views 3 times favorited 17 comments Add to Favorites Watch

Our GSD Java is keeping a watchful eye on my latest creation, A Towers of Hanoi puzzle. I used to play this as a kid, many decades ago, and have been meaning to make one for quite a while. Finally got off my duff a couple days ago and knocked this one out.This one has a 1/2” pine base, the disks are 3/8” pine.

Thanks for looking

-- Snow's Wooden Toys & Gifts





17 comments so far

View hunter71's profile

hunter71

2729 posts in 2646 days


#1 posted 12-08-2014 02:37 AM

Does he play?

-- A childs smile is payment enough.

View nuzzo's profile

nuzzo

64 posts in 2576 days


#2 posted 12-08-2014 02:51 PM

Hmmm, chase my tail or play that game. I’ll chase my tail.

View workerinwood's profile

workerinwood

2716 posts in 2527 days


#3 posted 12-08-2014 02:55 PM

Great job!! Still have the one I made back in junior high school. I need to make some for my grand kids.

-- Jack, Albuquerque

View DBrown52's profile

DBrown52

65 posts in 1190 days


#4 posted 12-08-2014 03:45 PM

Very nice… although this will probably trigger nightmares for the Comp-Science crowd.

View LesB's profile

LesB

1235 posts in 2902 days


#5 posted 12-08-2014 05:37 PM

Great toy for kids to learn to how to concentrate on what they are doing.
For those who don’t know the rules. The object is to transfer the stack of disks from one peg to another. Moving one disk at a time and never putting a larger disk on top of a smaller one.

-- Les B, Oregon

View DBrown52's profile

DBrown52

65 posts in 1190 days


#6 posted 12-08-2014 05:51 PM



Great toy for kids to learn to how to concentrate on what they are doing.
For those who don t know the rules. The object is to transfer the stack of disks from one peg to another. Moving one disk at a time and never putting a larger disk on top of a smaller one.

- LesB

It’s a good way for everyone to understand how simple problems can get very complex very quickly as well. If it takes you one second to make a move, you can solve an 8 disk game in about 4 minutes. A 12 disk game would take a little over an hour. A 30 disk game would take around 34 years. And a 64 disk game would take 585 billion years!

View Dallas's profile

Dallas

3599 posts in 1946 days


#7 posted 12-08-2014 06:57 PM

To say you got me on this one is an understatement. I will now have to build one and work it out.

-- Improvise.... Adapt...... Overcome!

View Hawaiilad's profile

Hawaiilad

2890 posts in 2480 days


#8 posted 12-08-2014 07:49 PM

Nice toy…still don’t understand how to play it…can you please explain a bit more. Also, where did you find the design showing sizes of rings?

-- Larry in Hawaii,

View Dallas's profile

Dallas

3599 posts in 1946 days


#9 posted 12-08-2014 07:55 PM

I tried it on a animated website. I did the 8 in 3m 52s. That was my second try. the first one was a 3 disk.

Hawaiilad, size don’t matter as long as they are larger than the one on top.

It’s cool and will keep your brain working.

-- Improvise.... Adapt...... Overcome!

View dansnow's profile

dansnow

271 posts in 1304 days


#10 posted 12-08-2014 07:57 PM

The design is simple. The largest ring is 5.5” because that was the width of the board I started with. Each successive ring is 1/2” smaller in diameter than the previous one. You can make as many or as few rings as you chose, though those sold in stores usually have between 7-9 rings. Minimum number of moves for a 7 ring tower is 127 moves, 8 rings is 255 moves and 9 rings is 511.

You start with all the rings on one rod as shown in first picture. The object is to move the entire stack to another rod, largest on bottom going to smallest on top. Rules are simple. You can only move one disk at a time. You cannot put a larger disk on top of a smaller disk.

-- Snow's Wooden Toys & Gifts

View Dallas's profile

Dallas

3599 posts in 1946 days


#11 posted 12-08-2014 08:13 PM

Umm, maybe I got something wrong, but you have to move more than one disk at a time or after 3 moves you are done.

-- Improvise.... Adapt...... Overcome!

View Underdog's profile

Underdog

898 posts in 1495 days


#12 posted 12-08-2014 08:16 PM

Nope, you can’t move more than one disk at a time…

I made one of these for my son at his request. It’s a bit tedious and you can easily make a wrong move.

-- "woodworker with an asterisk"

View Underdog's profile

Underdog

898 posts in 1495 days


#13 posted 12-08-2014 08:20 PM

Play it here to see how it works:
http://www.coolmath-games.com/0-tower-of-hanoi/

-- "woodworker with an asterisk"

View Dallas's profile

Dallas

3599 posts in 1946 days


#14 posted 12-08-2014 08:35 PM

Got it! The other one was allowing you to move multiple disks after they were off the first post.
I finished the one you linked in 123 seconds.
Probably because I was expecting some of the moves.

-- Improvise.... Adapt...... Overcome!

View DBrown52's profile

DBrown52

65 posts in 1190 days


#15 posted 12-08-2014 09:02 PM


Minimum number of moves for a 7 ring tower is 127 moves, 8 rings is 255 moves and 9 rings is 511.

Dan’s right. For “n” rings, the minimum number of moves is 2^n – 1. They use this game to teach young computer science students about complexity and how to solve certain kinds of problems.

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