import { CellCollection } from '../CellCollection';
import { Grid, CellValueChange } from '../Grid';
export declare class ObviousPairsSolver {
    /**
     * Searches the values with a single potential and if it finds any, returns an
     * array of changes to apply to the target grid.
     * @param targetGrid The grid to solve.
     * @returns An array of changes to apply to the grid to solve it.
     */
    static solve(targetGrid: Grid): CellValueChange[];
    /**
     * Searches a given row, column or block for obvious pairs and returns an
     * array of objects to remove unneeded potentials from the rest of the cells.
     * @param block A reference to a row, column or block to process.
     * @returns An array of GridDifference objects to apply back to the Grid.
     */
    static solveForBlock(block: CellCollection): CellValueChange[];
}