/**
 * Lightweight Go board for KataGo ONNX input encoding.
 *
 * Tracks stone placement and history (up to 8 moves back) needed to
 * construct KataGo's binary spatial feature planes.
 */
export type Color = 0 | 1 | 2;
export interface Stone {
    row: number;
    col: number;
}
export declare class KataGoBoard {
    readonly size: number;
    private _board;
    /** Board snapshots for last N plies (index 0 = most recent) */
    private _history;
    private _koPoint;
    private _currentPlayer;
    constructor(size?: number);
    get currentPlayer(): Color;
    get koPoint(): number;
    /** Return flat board array (copy). */
    get stones(): Color[];
    /** Return a history snapshot at depth d (0 = current, 1 = one move ago …). */
    historyAt(d: number): Color[];
    /** Convert "D4" / "pass" / "resign" to flat board index or -1. */
    static gtpToIndex(gtpMove: string, size: number): number;
    /** Convert flat index back to GTP string. */
    static indexToGtp(idx: number, size: number): string;
    /** Apply a move (GTP string or "pass") to the board. */
    applyMove(gtpMove: string): void;
    /** Reset to empty board (new game). */
    reset(): void;
    private _neighbors;
    private _groupAndLiberties;
    /** Remove captured opponent groups; return captured count. */
    private _removeCaptures;
    /** Very simple ko detection: returns the ko point index or -1. */
    private _detectKo;
}
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