![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpV9rz6UCMobGclQZ5v3D3SGG1QHy9fZwY2X0FGxHwwxbs2LgAEesTa16jkFG6b9dFx76vRH-HELQD5UY_9HbJtE8Ge4b26WbQy2Odd7UkzBRHlDE5VTjBl7toNlfAzTurqA_6UiaiqQk/s320/Eternity.jpg)
http://us.eternityii.com/try-eternity2-online/
Try this online sample before tackling the big puzzle.
Historical note: about 1989 Rubik came out with 4 different edge matching Tangle puzzles. Each had 25 pieces. After solving each one, you had to assemble all 100 pieces to form a square. I confess quietly: I was not able to solve the 25 piece version. And I spent a lot of time on it.