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Last modified August 19th, 2025
Contact email address: gibell-at-comcast-dot-net
| Year | IPP | Where | Exchange puzzle | Assistant | Made from | Manufactured by | Saved | Extra |
|---|---|---|---|---|---|---|---|---|
| 2010 | 30 (1) | Osaka | Screwy Octahedron | none | nylon | Shapeways | 4 | 0 | 2011 | 31 (2) | Berlin | Three Piece Whatsit | none | wood | Bernhard Schweitzer/Pelikan | 3 | 1 |
| 2012 | 32 (3) | Washington DC | Lomino Cube 4 | Allison Bell (15) | acrylic | Ponoko | 3 | 0 |
| 2013 | 33 (4) | Tokyo | Octetra | Bret Rothstein | nylon | Shapeways | 1 | 0 |
| 2014 | 34 (5) | London | Orchid Pennyhedron | Henry Bell (14) | wood | Stephen Chin | 3 | 0 |
| 2015 | 35 (6) | Ottawa | Housing Crunch | Allison Bell (18) | wood | OrangeKat, LLC | 3 | 0 |
| 2017 | 37 (7) | Paris | Clock Solitaire | Esther Brady | wood | Creative Crafthouse | 6 | 8 |
| 2018 | 38 (8) | San Diego | Pyradox | Esther Brady | wood and bamboo | me | 3 | 11 |
| 2019 | 39 (9) | Kanazawa | Progressive Pyramid | Paul Dudding | wood and acrylic | me | 3 | 0 |
| 2021 | 39⅓ | † | Melting F | n/a | PLA and acrylic | me | 3 | 32 |
| 2022 | 39⅔ | † | Flippe Ball | n/a | PLA | me | 0 | 50 |
| 2023 | 40 (10) | Jerusalem | Broken Burr | Rick Eason | PLA | me | 0 | 30 |
| 2024 | 41 (11) | Houston | Dr. Bell's Curiously Warped Mints | Bret Rothstein | PLA | me | 0 | 30 |
| 2025 | 42 (12) | Tokyo | Diabolical Burr aka Dia-ball-ical Burr | Joshua Nelson | PLA | me | 0 | 30 |
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