Isaac's Iris

Mijkel1969 95

USD 36.00

: Closed

Postage: First class package
USD 5.00 to United States

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Bidder	Amount	Date
C****r 144	USD 36.00	02/11/2021 20:44:16

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Description

A seemingly incredibly mathematically complex puzzle in mechanical puzzle form, Isaac's Iris was based on an idea by world-renowned computer science giant Donald Knuth and used by perennial puzzle exchange participant Stan Isaacs as his exchange puzzle at the 21st International Puzzle party (IPP21) held in Tokyo in 2001. The object of the puzzle is to arrange the sixteen pieces to form a disc --- resembling the iris of an eye or of a camera (as in photo 2, which is a stock photo --- my offering is still in its original shrink wrap) --- that meets certain assembly constraints.

The puzzle is unopened in its original shrink wrap, as received at IPP21, with original instruction sheet (photo 3), mathematical hints (photo 4), and solution.

Specifications

Designer: George Miller / Donald Knuth
Craftsman / Manufacturer: George Miller
Material: Hard plastic
Unit of Measurement: Inches
Size: 3 1/2 in diameter when assembled
Grade: New: Unopened, unsolved, still in packaging.
Cosmetic Issues: -
Function: New: Unopened, unsolved, still in packaging.
Functional Issues: -
Repairs: No
Packaging: Yes
Documentation: Yes
Assembly: Disassembled
Smoke-free home: -

Payments & Returns

Payment Methods: PayPal

Postage & Shipping

Item Location: 49006-3265, Michigan, United States
Ships To: Worldwide
Shipping Instructions: Shipping via first class package is $5.00. I am happy to ship via priority mail; the cost will vary between $8.00-$10.00 depending on location.

Returns Accepted: No

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