/*!
 * -------------------------------------------------------------------------- *
 *                                                                            *
 *    Kokopu - A JavaScript/TypeScript chess library.                         *
 *    <https://www.npmjs.com/package/kokopu>                                  *
 *    Copyright (C) 2018-2025  Yoann Le Montagner <yo35 -at- melix.net>       *
 *                                                                            *
 *    Kokopu is free software: you can redistribute it and/or                 *
 *    modify it under the terms of the GNU Lesser General Public License      *
 *    as published by the Free Software Foundation, either version 3 of       *
 *    the License, or (at your option) any later version.                     *
 *                                                                            *
 *    Kokopu is distributed in the hope that it will be useful,               *
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of          *
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the            *
 *    GNU Lesser General Public License for more details.                     *
 *                                                                            *
 *    You should have received a copy of the GNU Lesser General               *
 *    Public License along with this program. If not, see                     *
 *    <http://www.gnu.org/licenses/>.                                         *
 *                                                                            *
 * -------------------------------------------------------------------------- */
import { Color, Piece, ColoredPiece, File, Rank, Square, SquareCouple, Castle, Castle960, Coordinates, GameResult, GameVariant } from './base_types';
/**
 * Whether the given value represents a valid {@link Color} or not.
 */
export declare function isColor(value: unknown): value is Color;
/**
 * Whether the given value represents a valid {@link Piece} or not.
 */
export declare function isPiece(value: unknown): value is Piece;
/**
 * Whether the given value represents a valid {@link ColoredPiece} or not.
 */
export declare function isColoredPiece(value: unknown): value is ColoredPiece;
/**
 * Whether the given value represents a valid {@link File} or not.
 */
export declare function isFile(value: unknown): value is File;
/**
 * Whether the given value represents a valid {@link Rank} or not.
 */
export declare function isRank(value: unknown): value is Rank;
/**
 * Whether the given value represents a valid {@link Square} or not.
 */
export declare function isSquare(value: unknown): value is Square;
/**
 * Whether the given value represents a valid {@link SquareCouple} or not.
 */
export declare function isSquareCouple(value: unknown): value is SquareCouple;
/**
 * Whether the given value represents a valid {@link Castle} or not.
 */
export declare function isCastle(value: unknown): value is Castle;
/**
 * Whether the given value represents a valid {@link Castle960} or not.
 */
export declare function isCastle960(value: unknown): value is Castle960;
/**
 * Whether the given value represents a valid {@link GameResult} or not.
 */
export declare function isGameResult(value: unknown): value is GameResult;
/**
 * Whether the given value represents a valid {@link GameVariant} or not.
 */
export declare function isGameVariant(value: unknown): value is GameVariant;
/**
 * Execute the given callback on each of the 64 squares.
 */
export declare function forEachSquare(callback: (square: Square) => void): void;
/**
 * Return the color of a square.
 */
export declare function squareColor(square: Square): Color;
/**
 * Return the coordinates of a square.
 */
export declare function squareToCoordinates(square: Square): Coordinates;
/**
 * Return the square corresponding to the given coordinates.
 */
export declare function coordinatesToSquare(file: number, rank: number): Square;
/**
 * Return the square corresponding to the given coordinates.
 */
export declare function coordinatesToSquare(coordinates: Coordinates): Square;
/**
 * Change white to black, and black to white.
 */
export declare function oppositeColor(color: Color): Color;
/**
 * Whether the given variant has a canonical start position or not.
 */
export declare function variantWithCanonicalStartPosition(variant: GameVariant): boolean;
/**
 * Return the human-readable symbol for the given [NAG](https://en.wikipedia.org/wiki/Numeric_Annotation_Glyphs).
 */
export declare function nagSymbol(nag: number): string;
/**
 * Whether the given string represents a valid [ECO code](https://en.wikipedia.org/wiki/List_of_chess_openings) or not.
 */
export declare function isValidECO(eco: string): boolean;