超级华容道

Hua Rong Dao (alternatively named Hua Rong Path, Chinese name: 華容道) is the Chinese variation of Klotski. Klotski is a sliding block puzzle. Sometimes it only refers to the block arrangement in the right hand side diagram, where the largest block (in red) must move to the bottom middle location (marked in blue). In a more global sense, Klotski refers to a whole group of similar sliding block puzzles where the aim is to move a specific block to some predefined location.

Hua Rong Dao features an old legendary during Battle of Red Cliffs in the 13th year of Jian An in the East Han Dynasty 208AD-- a well-known battle in Chinese history. The legendary: Cao Cao was defeated in this battle, and escaped to Hua Rong Dao, in which he encountered Guan Yu. Because Guan Yu remembered Cao Cao treated him well during old days despite he was a general of enemy of Cao Cao, Guan Yu spared Cao Caos life. The largest block is named Cao Cao.

The minimum number of moves for the original puzzle is 81, which is verified by computer to be the absolute minimum for the default starting layout, if you consider sliding a piece two positions in the same direction to be a single move.

Do you really believe that much moves? Have a try and tell us your solving!