Designs and levels of difficulty of puzzles
Furthermore, there are puzzles that are printed with (different) motifs on both sides, so that you also have to decide which is the "correct" side of each puzzle piece. In addition, puzzles without a straight edge are offered, in which some additional pieces have been added that do not belong to the motif. The challenge here is not only to lay the puzzle, but also to find out the unnecessary pieces.
The largest puzzle in the world at the time measured 5,428.8 m² and consisted of 21,600 pieces, each 50 cm by 50 cm in size. It was assembled by 777 people at the former Kai Tak Airport in Hong Kong on November 3, 2002.
More than 10,000 puzzle fans set a new world record on Sunday, September 28, 2008 in Ravensburg at the third German Puzzle Day: Within five hours, puzzlers big and small put together the giant puzzle from around 1.15 million pieces. The puzzle consists of more than 4,000 individual games, each with 300 pieces and different motifs.
The individual games are not straight at the edges, but can be connected to the others. The finished plant covers an area of 600 square meters.
The puzzle pieces were made by the game manufacturer Ravensburger AG, which is celebrating its 125th anniversary this year. The people of Singapore had put together the largest puzzle in the world to date. It consisted of 212,000 parts.