/**
 * The possible values a cell can have.
 */
export declare type SudokuPossibleValue = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
/**
 * An array of possible values.
 */
export declare type SudokuPossibleValues = ReadonlyArray<SudokuPossibleValue>;
/**
 * A helper class describing all possible values.
 */
export declare const SudokuAllPossibleValues: SudokuPossibleValues;
/**
 * Possible rows in a grid.
 */
export declare type GridRows = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
/**
 * Possible columns in a grid.
 */
export declare type GridColumns = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
/**
 * Possible blocks in a grid.
 */
export declare type GridBlocks = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9;
/**
 * Defines the location of a cell within a grid.
 */
export declare type GridLocation = {
    column: GridColumns;
    row: GridRows;
};
/**
 * Defines the sizes for the various solvers.
 */
export declare enum ValueComboType {
    Pair = 2,
    Triple = 3,
    Quad = 4
}
/**
 * Describes a change to a grid.
 */
export declare type CellValueChange = {
    source: string;
    location: GridLocation;
    valuesToRemove: SudokuPossibleValue[];
};