Rubik's Tangle
Rubik's Tangle is a puzzle by Ernő Rubik that was released in the 1990s. It consists of 25 square parts that are to be put together to form a large square of 5 × 5 parts. There are positional options (25 pieces → , four possible orientations per piece → , four puzzles are identical due to rotation, two are identical because two puzzle pieces are the same). In practice, far fewer combinations have to be tried out, as incorrect connections can occur with the first parts.
solutions
The individual parts are marked on the back from A to Y so that the solutions can be simply given here. Parts D and F are identical. There are two solutions:
A L H D W D O Y C E S X N E I I L F M X G C K R J A H G S J F M U P B W R T N B Q O Y T V K Q V U P
By rotating and exchanging D and F, you get a total of 16 solutions.
Combinations of several games
There are different approaches to combine several tangles, i.e. to find solutions with 50 or 100 parts. There is supposedly no solution for a 10 × 10 puzzle made up of four tangles. However, with two tangles a 7 × 7 solution can be found:
G D O N E C F K R J B G W Q L C U Y W A S X Q P T K S A D R H M I L J Y H I V P O X U M V B F E N