/** File */
export type File = 'a' | 'b' | 'c' | 'd' | 'e' | 'f' | 'g' | 'h';
/** Rank */
export type Rank = 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8;
/** Black or white */
export type Color = 'b' | 'w';
/** Enemy color */
export type EnemyColor<T extends Color> = T extends 'b' ? 'w' : 'b';
/** Black pieces */
export type BlackPiece = 'r' | 'n' | 'b' | 'q' | 'k' | 'p';
/** White pieces */
export type WhitePiece = 'R' | 'N' | 'B' | 'Q' | 'K' | 'P';
/** All pieces */
export type Piece = BlackPiece | WhitePiece;
/** Promotion pieces */
export type PromotionPiece = Exclude<Piece, 'p' | 'P' | 'k' | 'K'>;
/** Unoccupied piece */
export type Unoccupied = ' ';
/** Possible value at a position */
export type MaybePiece = Piece | Unoccupied;
/** Pieces by color */
export type PieceColor<T extends Piece> = T extends BlackPiece ? 'b' : 'w';
/** Friendly pieces */
export type FriendlyPiece<T extends Color> = T extends 'b' ? BlackPiece : WhitePiece;
/** Castling rights by color */
export type Castling = {
    K: boolean;
    Q: boolean;
    k: boolean;
    q: boolean;
};
/** Parsed game state */
export type ParsedGame = {
    board: [
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece,
        MaybePiece
    ];
    turn: Color;
    castling: Castling;
    ep: Index | null;
    halfmove: number;
    fullmove: number;
};
/** Parsed move */
export type ParsedMove = {
    castle: 'K' | 'Q' | 'k' | 'q' | false;
    from: Index;
    to: Index;
    promotion: PromotionPiece | '';
};
/** All possible board indices */
export type Indices = [
    0,
    1,
    2,
    3,
    4,
    5,
    6,
    7,
    8,
    9,
    10,
    11,
    12,
    13,
    14,
    15,
    16,
    17,
    18,
    19,
    20,
    21,
    22,
    23,
    24,
    25,
    26,
    27,
    28,
    29,
    30,
    31,
    32,
    33,
    34,
    35,
    36,
    37,
    38,
    39,
    40,
    41,
    42,
    43,
    44,
    45,
    46,
    47,
    48,
    49,
    50,
    51,
    52,
    53,
    54,
    55,
    56,
    57,
    58,
    59,
    60,
    61,
    62,
    63
];
export type Index = Indices[number];
/** Direction index of a 3x3 matrix */
export type DirectionIndex = 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8;
/** Sorted list of positions by fen index */
export type Positions = [
    'a8',
    'b8',
    'c8',
    'd8',
    'e8',
    'f8',
    'g8',
    'h8',
    'a7',
    'b7',
    'c7',
    'd7',
    'e7',
    'f7',
    'g7',
    'h7',
    'a6',
    'b6',
    'c6',
    'd6',
    'e6',
    'f6',
    'g6',
    'h6',
    'a5',
    'b5',
    'c5',
    'd5',
    'e5',
    'f5',
    'g5',
    'h5',
    'a4',
    'b4',
    'c4',
    'd4',
    'e4',
    'f4',
    'g4',
    'h4',
    'a3',
    'b3',
    'c3',
    'd3',
    'e3',
    'f3',
    'g3',
    'h3',
    'a2',
    'b2',
    'c2',
    'd2',
    'e2',
    'f2',
    'g2',
    'h2',
    'a1',
    'b1',
    'c1',
    'd1',
    'e1',
    'f1',
    'g1',
    'h1'
];
/** Union of all positions */
export type Position = Positions[Index];
/** Lookup table to get a position's fen index */
export type PositionIndex = {
    a8: 0;
    b8: 1;
    c8: 2;
    d8: 3;
    e8: 4;
    f8: 5;
    g8: 6;
    h8: 7;
    a7: 8;
    b7: 9;
    c7: 10;
    d7: 11;
    e7: 12;
    f7: 13;
    g7: 14;
    h7: 15;
    a6: 16;
    b6: 17;
    c6: 18;
    d6: 19;
    e6: 20;
    f6: 21;
    g6: 22;
    h6: 23;
    a5: 24;
    b5: 25;
    c5: 26;
    d5: 27;
    e5: 28;
    f5: 29;
    g5: 30;
    h5: 31;
    a4: 32;
    b4: 33;
    c4: 34;
    d4: 35;
    e4: 36;
    f4: 37;
    g4: 38;
    h4: 39;
    a3: 40;
    b3: 41;
    c3: 42;
    d3: 43;
    e3: 44;
    f3: 45;
    g3: 46;
    h3: 47;
    a2: 48;
    b2: 49;
    c2: 50;
    d2: 51;
    e2: 52;
    f2: 53;
    g2: 54;
    h2: 55;
    a1: 56;
    b1: 57;
    c1: 58;
    d1: 59;
    e1: 60;
    f1: 61;
    g1: 62;
    h1: 63;
};
/**
 * This graph represents the positions on a chessboard and their relationship to
 * one another. Each index coorelates to a position on the board, and each child
 * value represents the index of a neighboring position relative to a 3x3 grid,
 * with the original position at the center. -1 represents off the board.
 *
 * For example, to find the position directly above d4...
 *
 * [
 *   ...
 *   //     d4 is located at index 35, so skip to that row in the graph and
 *   //     take the 2nd value from that 3x3 matrix
 *   [      ↓
 *     26, 27, 28,
 *     34, 35, 36,
 *     42, 43, 44
 *   ]
 * ]
 *
 */
export type Graph = [
    [
        -1,
        -1,
        -1,
        -1,
        0,
        1,
        -1,
        8,
        9
    ],
    [
        -1,
        -1,
        -1,
        0,
        1,
        2,
        8,
        9,
        10
    ],
    [
        -1,
        -1,
        -1,
        1,
        2,
        3,
        9,
        10,
        11
    ],
    [
        -1,
        -1,
        -1,
        2,
        3,
        4,
        10,
        11,
        12
    ],
    [
        -1,
        -1,
        -1,
        3,
        4,
        5,
        11,
        12,
        13
    ],
    [
        -1,
        -1,
        -1,
        4,
        5,
        6,
        12,
        13,
        14
    ],
    [
        -1,
        -1,
        -1,
        5,
        6,
        7,
        13,
        14,
        15
    ],
    [
        -1,
        -1,
        -1,
        6,
        7,
        -1,
        14,
        15,
        -1
    ],
    [
        -1,
        0,
        1,
        -1,
        8,
        9,
        -1,
        16,
        17
    ],
    [
        0,
        1,
        2,
        8,
        9,
        10,
        16,
        17,
        18
    ],
    [
        1,
        2,
        3,
        9,
        10,
        11,
        17,
        18,
        19
    ],
    [
        2,
        3,
        4,
        10,
        11,
        12,
        18,
        19,
        20
    ],
    [
        3,
        4,
        5,
        11,
        12,
        13,
        19,
        20,
        21
    ],
    [
        4,
        5,
        6,
        12,
        13,
        14,
        20,
        21,
        22
    ],
    [
        5,
        6,
        7,
        13,
        14,
        15,
        21,
        22,
        23
    ],
    [
        6,
        7,
        -1,
        14,
        15,
        -1,
        22,
        23,
        -1
    ],
    [
        -1,
        8,
        9,
        -1,
        16,
        17,
        -1,
        24,
        25
    ],
    [
        8,
        9,
        10,
        16,
        17,
        18,
        24,
        25,
        26
    ],
    [
        9,
        10,
        11,
        17,
        18,
        19,
        25,
        26,
        27
    ],
    [
        10,
        11,
        12,
        18,
        19,
        20,
        26,
        27,
        28
    ],
    [
        11,
        12,
        13,
        19,
        20,
        21,
        27,
        28,
        29
    ],
    [
        12,
        13,
        14,
        20,
        21,
        22,
        28,
        29,
        30
    ],
    [
        13,
        14,
        15,
        21,
        22,
        23,
        29,
        30,
        31
    ],
    [
        14,
        15,
        -1,
        22,
        23,
        -1,
        30,
        31,
        -1
    ],
    [
        -1,
        16,
        17,
        -1,
        24,
        25,
        -1,
        32,
        33
    ],
    [
        16,
        17,
        18,
        24,
        25,
        26,
        32,
        33,
        34
    ],
    [
        17,
        18,
        19,
        25,
        26,
        27,
        33,
        34,
        35
    ],
    [
        18,
        19,
        20,
        26,
        27,
        28,
        34,
        35,
        36
    ],
    [
        19,
        20,
        21,
        27,
        28,
        29,
        35,
        36,
        37
    ],
    [
        20,
        21,
        22,
        28,
        29,
        30,
        36,
        37,
        38
    ],
    [
        21,
        22,
        23,
        29,
        30,
        31,
        37,
        38,
        39
    ],
    [
        22,
        23,
        -1,
        30,
        31,
        -1,
        38,
        39,
        -1
    ],
    [
        -1,
        24,
        25,
        -1,
        32,
        33,
        -1,
        40,
        41
    ],
    [
        24,
        25,
        26,
        32,
        33,
        34,
        40,
        41,
        42
    ],
    [
        25,
        26,
        27,
        33,
        34,
        35,
        41,
        42,
        43
    ],
    [
        26,
        27,
        28,
        34,
        35,
        36,
        42,
        43,
        44
    ],
    [
        27,
        28,
        29,
        35,
        36,
        37,
        43,
        44,
        45
    ],
    [
        28,
        29,
        30,
        36,
        37,
        38,
        44,
        45,
        46
    ],
    [
        29,
        30,
        31,
        37,
        38,
        39,
        45,
        46,
        47
    ],
    [
        30,
        31,
        -1,
        38,
        39,
        -1,
        46,
        47,
        -1
    ],
    [
        -1,
        32,
        33,
        -1,
        40,
        41,
        -1,
        48,
        49
    ],
    [
        32,
        33,
        34,
        40,
        41,
        42,
        48,
        49,
        50
    ],
    [
        33,
        34,
        35,
        41,
        42,
        43,
        49,
        50,
        51
    ],
    [
        34,
        35,
        36,
        42,
        43,
        44,
        50,
        51,
        52
    ],
    [
        35,
        36,
        37,
        43,
        44,
        45,
        51,
        52,
        53
    ],
    [
        36,
        37,
        38,
        44,
        45,
        46,
        52,
        53,
        54
    ],
    [
        37,
        38,
        39,
        45,
        46,
        47,
        53,
        54,
        55
    ],
    [
        38,
        39,
        -1,
        46,
        47,
        -1,
        54,
        55,
        -1
    ],
    [
        -1,
        40,
        41,
        -1,
        48,
        49,
        -1,
        56,
        57
    ],
    [
        40,
        41,
        42,
        48,
        49,
        50,
        56,
        57,
        58
    ],
    [
        41,
        42,
        43,
        49,
        50,
        51,
        57,
        58,
        59
    ],
    [
        42,
        43,
        44,
        50,
        51,
        52,
        58,
        59,
        60
    ],
    [
        43,
        44,
        45,
        51,
        52,
        53,
        59,
        60,
        61
    ],
    [
        44,
        45,
        46,
        52,
        53,
        54,
        60,
        61,
        62
    ],
    [
        45,
        46,
        47,
        53,
        54,
        55,
        61,
        62,
        63
    ],
    [
        46,
        47,
        -1,
        54,
        55,
        -1,
        62,
        63,
        -1
    ],
    [
        -1,
        48,
        49,
        -1,
        56,
        57,
        -1,
        -1,
        -1
    ],
    [
        48,
        49,
        50,
        56,
        57,
        58,
        -1,
        -1,
        -1
    ],
    [
        49,
        50,
        51,
        57,
        58,
        59,
        -1,
        -1,
        -1
    ],
    [
        50,
        51,
        52,
        58,
        59,
        60,
        -1,
        -1,
        -1
    ],
    [
        51,
        52,
        53,
        59,
        60,
        61,
        -1,
        -1,
        -1
    ],
    [
        52,
        53,
        54,
        60,
        61,
        62,
        -1,
        -1,
        -1
    ],
    [
        53,
        54,
        55,
        61,
        62,
        63,
        -1,
        -1,
        -1
    ],
    [
        54,
        55,
        -1,
        62,
        63,
        -1,
        -1,
        -1,
        -1
    ]
];