import { Grid } from '../Grid';
import { CellValueChange } from '../ValueTypes';
/**
 * Implements a Hidden Triple solver strategy.
 * @see <a href="https://sudoku.org.uk/SolvingTechniques/HiddenTriples.asp">Sudoku.org.uk</a>
 */
export declare class HiddenTriplesSolver {
    /**
     * The source of changes provided to callers.
     */
    static source: string;
    /**
     * Searches the Grid for hidden triples 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[];
}