IPP 29 Puzzle Lot - Revised
Jerry's Mechanical Puzzle & Brain Teaser Collection: IPP34 - Edward Hordern Puzzle Exchange
Quintet in F (Exchange Puzzle IPP 31)
Puzzle Auction - IPP Puzzles
LOT of 4 IPP Puzzles plus one
2016 Design Competition Results
5 IPP Puzzles plus one more Lot 8
Pavel's Puzzle Blog: International Puzzle Party (IPP) Archives
IPP anti Slide puzzle | Very unusual goal | Mr Puzzle
FantasTIC - IPP Design Competition entry – Wood Wonders
Solving the Mystery of the Secret International Puzzle Party - Atlas Obscura
IPP21 Burr, Exchange Puzzle from Mr. Puzzle, Brian Young
Plus! Puzzle! Burr Puzzle Edi Nagata IPP 30 Exchange Puzzle 🧩 | eBay
Puzzle Design Competition Archives | JL Puzzles
5 IPP Puzzles Packing and Poly shapes Lot 2
CSAIL Annual Meeting 2012 Puzzle (Erik Demaine and Martin Demaine)
The Pentagon Tiles. IPP 32 Packing Puzzle by Marcel Gillen Design by René Dawir | eBay
Andreas Röver - Puzzles
PuzzleMad: The IPP was a great success!
IPP38 Puzzle Exchange in San Diego, California, USA - 11th Aug 2018
LOT of 4 IPP Puzzles plus one
IPP Martian Diamond | George Sicherman | Mr Puzzle
Mechanical Puzzles | One Guy in IT
Very difficult 3 piece packing puzzle | IPP | Mr Puzzle
Jerry's Mechanical Puzzle & Brain Teaser Collection: IPP33 Exchange Puzzles
