Channel: OskarPuzzle

Category: Science & Technology

Tags: entertainhow togurueducation3d-printrubik's cubeadultsmechanicalturnsmartscrambleoscarpuzzletwisty puzzleproblempuzzles for kidsoskarpuzzlemeffertsguinness world recordenglishhardcube3d printgearsustoyinnovationthinkartnyloninventdifficultsatifyingprint-it-yourself2021engineeringcreativeintelligentthinkfunhanayama17x17slidepuzzleoskar van deventersolveoddlymathfun

Description: Buy the book that includes this puzzle: penguinrandomhouse.com/books/622520/the-puzzler-by-aj-jacobs. Read more about this double world record: twistypuzzles.com/forum/viewtopic.php?t=37692. Jacobs Ladder is a world-record mechanical puzzle, commissioned by A.J. Jacobs from New York, and designed and built by Oskar van Deventer using 3D-printing. The purpose of the puzzle is to get the long black rod out. However, it is blocked by the birch-wood pins that need to be rotated. Each pin can rotate in fours states. Each rotation of a pin requires 4x as many rotations from the pin below it. As the puzzle has 55 pins, 4^55 states, and the solution path passes each state, the total number of moves is 4^55 = 1 298 074 214 633 706 907 132 624 082 305 023 (1.3 x 10^33 moves). The previous world record was Rick Irby's 65-ring Chinese Rings puzzle from 1988. That puzzle required 2^65 = 36 893 488 147 419 103 231 (3.7 x 10^19 moves). Now, more than 30 years later, that world record has been broken by more than 13 orders of magnitude, which may be a world record by itself. It took 12 days of full-time 3D-printing to make the parts. The material is 3D-printed wood, which is transparent PLA filament, loaded with 20% wood part. The used woods are birch, mahogany and black wood, which nicely contrast. The puzzle's is 20x20 centimeter, which is the largest that Oskar's Dutchy 3D-printer can handle. For the same reason, the puzzle is built from segments of up to 20 centimeter high, which have been glued together. The puzzle weights 5 kilogram. The height of the puzzle is 117 centimeter, allowing for a 120-centimeter box, which is the largest regular size that DHL ships from Netherlands to New York. Copyright (c) 2021, M. Oskar van Deventer. Frequently Asked Question: oskarvandeventer.nl/FAQ.html Buy mass-produced Oskar puzzles at puzzlemaster.ca/browse/inventors/oskar (USA, CA) and sloyd.fi/oskar-deventer-c-151_154.html (EU) Buy exclusive 3D-printed Oskar puzzles at shapeways.com/shops/oskarpuzzles and i.materialise.com/shop/designer/oskarpuzzle