From Sudopedia
Jump to navigationJump to search

A digit placed into a cell without a logical reason.

A controversial way to solve a Sudoku, usually employed when the player cannot advance using the solving techniques he or she has mastered. When the guess leads immediately to the solution, the player has found a backdoor. Alternatively, when the guess leads to a contradiction, the player must backtrack to the state before the digit was placed and he or she can eliminate the candidate for that digit. This method is also known as Trial & Error.

Deb icon.gif The topic in this article is a still a subject of debate. Parts of the text may not express everybody's opinion. Use the associated Talk page if you do not agree with the opinion of the writer, rather than continuously editing the main article.