export declare type Key = import('chessground/types').Key;
export declare type Dests = import('chessground/types').Dests;
export interface GameDelta {
    fen: string;
    turnColor: 'white' | 'black';
    isCheck: boolean;
    dests: Dests;
    lastMove: import('chess.js').Move;
    isGameOver: boolean;
    isStalemate: boolean;
    isCheckmate: boolean;
    isDraw: boolean;
    isThreefoldRepetition: boolean;
    isInsufficientMaterial: boolean;
    comment?: string;
}
export declare type Promotion = 'q' | 'b' | 'n' | 'r' | undefined;
export interface ChessGame {
    getDests(): Dests;
    isPromotion(origin: Key, destination: Key): boolean;
    playUserMove(origin: Key, destination: Key, promotion?: Promotion): GameDelta;
    playAiMove(): GameDelta;
    turnColor(): 'white' | 'black';
    load(fen: string): GameDelta;
}
export interface ChessStudy {
    selectChapter(index: number): ChessChapter | null;
    getChapters(): ChessChapter[];
}
export interface ChessChapter extends ChessGame {
    title: string;
    site: string;
    showHints(): DrawShape[];
    playUserMove(origin: string, destination: string, promotion?: Promotion): GameDelta;
    playAiMove(): GameDelta;
    isEndOfLine(): boolean;
    reset(): void;
}
export interface DrawShape {
    orig: string;
    dest?: string;
    brush?: string;
    modifiers?: {
        lineWidth?: number;
    };
    piece?: {
        role: 'king' | 'queen' | 'rook' | 'bishop' | 'knight' | 'pawn';
        color: 'white' | 'black';
        scale?: number;
    };
    customSvg?: string;
}