In a Sudoku grid, boxes usually have a thicker border. Box A group of 9 cells in a 3x3 formation. Bowman Bingo A solving technique that does a systematic analysis of all implications for a move. Block-Block Interaction An alias used for Locked Candidates type 2. Bivalue Universal Grave A pattern in which all cells have 2 candidates, which causes the Sudoku to have 0 or 2 solutions. Bivalue Cell A cell with only 2 candidates left. Bilocal Unit A unit constraint with only 2 candidates left. Big Number Collective term for given and placed digits, as opposed to little number for pencilmarks. Bifurcation A limited form of Trial & Error where only constraints with 2 remaining candidates are considered. Backtracking Return to an earlier position in the solving path, after a contradiction or a dead end has been reached. Backdoor Placement of a digit from the solution into a cell which reduces the difficulty level of the remaining puzzle. B B/B Plot A diagram showing strong links. ATE An acronym used for Aligned Triple Exclusion. Ariadne's Thread A metaphore used for backtracking. APE An acronym used for Aligned Pair Exclusion. Alternating Inference See: Inference Alternating Inference Chain A chain with alternating strong and weak inference. ALS An acronym used for Almost Locked Set. Almost Locked Set A set of N cells with candidates for N+1 digits. Aligned Triple Exclusion A solving technique that examines the possible configurations for a triple of cells in an intersection. Aligned Pair Exclusion A solving technique that examines the possible configurations for a pair of cells in an intersection. AIC An acronym used for Alternating Inference Chain. A Advanced Coloring An alias used for 3D Medusa. This is most applicable to Killer Sudoku. 45 rule A rule stating that the sum of the cells in a house must be 45. Here is an alphabetic list of the most commonly used terms.Ġ-9 3D Medusa A coloring technique for multiple digits. Most of the basic terms are now widely accepted, but some concepts are known by many different names. The Sudoku community has developed its own terminology.
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