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Peter’s Non-flipping Tri-Cairos (IPP25) by Peter Knoppers / Buttonius Puzzles

metagrobology 198

Item Location: United States

$50.00

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Peter’s Non-flipping Tri-Cairos (IPP25) by Peter Knoppers / Buttonius Puzzles

WOW! Tri-cairos are a specialty sort of pentomino, where each unit is comprised of a pentangle (rather than a square) with equilateral sides and two non-adjacent right angles. Creating a domino from three units is called a Tri-Cairo. There are eight possible non-flipping tri-cairos, and this puzzle present all with two bonus mono-cairos to pack it all into a cool tray puzzle with MANY different challenges depending on where the Tri-Cairo key piece(s) are constrained. Detailed instructions included. Designed and exchanged by Peter at IPP 25 in Helsinki.

Puzzles are made to live in people's hands. Pick one up today! See all active listings here: metagrobology : the study of puzzles

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metagrobology 198

Harry's Nails (IPP21) by Harry Nelson / Rick Irby

Harry's Nails (IPP21) by Harry Nelson / Rick IrbyRick Irby, the renowned master of metal malleability, crafted this very unusual five nail set with six challenges escalating in difficulty.Harry Nelson, a brilliant mathematician, designed and exchanged this puzzle at IPP 21 in Tokyo.Excellent condition with large table napkin "wrapper" printed with detailed instructions as shown.Shipping by USPS, payment via Zelle, check or money order. If you have any questions, please ask them before biddi...

$50.00

1 bid

metagrobology 198

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$95.00

6 bids

metagrobology 198

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$25.00

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metagrobology 198

Pluton "Les Minis" CT1106 by Arjeu

Pluton "Les Minis" CT1106 by ArjeuMade in the 80's/90's by Arjeu. Designer unknown.Arjeu was a French company that produced over 90 wooden mechanical puzzles, many of which are interlocking puzzles. Arjeu's line of puzzles are known for their intricate designs and challenging nature. Many of the designs are from Stewart Coffin, Phillipe Dubois, Pierlot, and others. Appealing at first glance, these puzzles are also known for being difficult and require dexterity and problem-solving skill...

$35.00

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Peter’s Non-flipping Tri-Cairos (IPP25) by Peter Knoppers / Buttonius Puzzles

metagrobology 198

$50.00

Description

Payments & Returns

Post Message

Harry's Nails (IPP21) by Harry Nelson / Rick Irby

Stella CT754 by Arjeu

Edges Don’t Match? (IPP26) by Andreas Röver / Buttonius Puzzles

Pluton "Les Minis" CT1106 by Arjeu