Speed solving the 15 puzzle is actually quite fun :) I have a few nice physical versions at home, although nothing really compares to the crazy speed I've seen

Speed solving the 15 puzzle is actually quite fun :) I have a few nice physical versions at home, although nothing really compares to the crazy speed I've seen people achieving on computer versions. Then again, speedcubing (Rubik's cube) is my "main" hobby, and it's a lot deeper and more interesting IMO.