Jerry's Mechanical Puzzle & Brain Teaser Collection: IPP33 Exchange Puzzles
The original B Lock By Boaz Feldman – New2Play
IPP anti Slide puzzle | Very unusual goal | Mr Puzzle
Jerry's Mechanical Puzzle & Brain Teaser Collection: IPP34 - Edward Hordern Puzzle Exchange
The Pentagon Tiles. IPP 32 Packing Puzzle by Marcel Gillen Design by René Dawir | eBay
Brian's Damn Puzzle Blog: 2012 New York Puzzle Party (Part 6)
LOT of 4 IPP Puzzles plus one
Neil's Puzzle Building Blog | The journey from puzzler to puzzle creator. | Page 2
Circelei IPP26 Exchange Puzzle by Henrik Haak
Plus! Puzzle! Burr Puzzle Edi Nagata IPP 30 Exchange Puzzle 🧩 | eBay
High Difficulty Puzzles Bitten Biscuits international Puzzle - Etsy
5 IPP Puzzles plus one more Lot 8
5 IPP Puzzles Packing and Poly shapes Lot 2
Very difficult 3 piece packing puzzle | IPP | Mr Puzzle
Solving the Mystery of the Secret International Puzzle Party - Atlas Obscura
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
8 x IPP 39 exchange puzzles
Puzzle Auction - IPP Puzzles
Puzzle Design Competition Archives | JL Puzzles
Andreas Röver - Puzzles
5 IPP Exchange Puzzle, 2000-2002
2017 Puzzle Design Competition Entries
