"Christmas 2001" - Modified to remove unwanted solutions

thingiverse

Instructions: Place all five flat pieces into the large rectangular tray. This puzzle may not appear challenging at first, but it can be more difficult than anticipated. Idea: Upon reviewing Coffin's revised puzzle, I discovered two unintended solutions, one of which is exceptionally straightforward. To rectify this issue, I altered two pieces while maintaining their unique properties and eliminating the unwanted solutions. The modifications were made to ensure that no identical or symmetrical pieces exist. Everything else remains unchanged. To facilitate the update, download only the modified pieces in coffin.christmas-2001-modified.only-changed-pieces.stl. Although Coffin stated that it's impossible to mathematically confirm the absence of unintended solutions, I conducted some manual and computational testing to validate the puzzle's integrity. Credit goes to Stewart Coffin for creating the revised puzzle "Christmas 2001," which this modification is based on. I would like to thank asiegel on thingiverse for providing the 3D models and kindly allowing me to use PuzzleCad to make these modifications. Additionally, I acknowledge the developers of BurrTools for their program, which assisted in testing this puzzle.