Good morningpublished at 04:58 British Summer Time 15 August 2023
Hello and welcome to our coverage of the Rubik's Cube World Championships in Seoul, South Korea.
It's the final day of the competition, in which hundreds of "speedcubers" are competing across 17 events. These range from competing to solve the classic cube in the shortest time, to tackling it blindfolded or one-handed, to cracking other so-called "twisty puzzles" such as the pyramid-shaped Pyraminx or the dodecahedron-shaped Megaminx.
Designed in 1974 by the Hungarian architect Erno Rubik as a teaching tool, the Rubik's cube is now one of the best-selling toys of all time. Speedcubing has surged in popularity, with the world record for solving the puzzle now 3.13 seconds - a fraction of the first world record of 22.95 seconds, set in 1982.
We won't be providing text updates, but you can watch live coverage by clicking the play button at the top of this page, with commentary provided by the World Cube Association which runs the championships.