Category:Uniqueness

The Uniqueness issue is controversial. The question is whether or not the solver may assume that the Sudoku has a unique solution. There are several solving techniques that use this unique solution as a premise. However, this puts them on equal terms with a lucky guess, in which no logic is used, but where the player merely stumbles upon the solution.

Several players have stated that proving the existence of a unique solution is part of the puzzle. Others trust the puzzle maker, who guarantees this unique solution. Like many debates, this one will probably never end.

The listed articles are mainly solving techniques that assume a unique solution.

See also Category:Controversies