var King_Moves = {
    a1: ['a2', 'b2', 'b1'],
    b1: ['a2', 'b2', 'c2', 'a1', 'c1'],
    c1: ['b2', 'c2', 'd2', 'b1', 'd1'],
    d1: ['c2', 'd2', 'e2', 'c1', 'e1'],
    e1: ['d2', 'e2', 'f2', 'd1', 'f1'],
    f1: ['e2', 'f2', 'g2', 'e1', 'g1'],
    g1: ['f2', 'g2', 'h2', 'f1', 'h1'],
    h1: ['g2', 'h2', 'g1'],
    a2: ['a3', 'b3', 'b2', 'a1', 'b1'],
    b2: ['a3', 'b3', 'c3', 'a2', 'c2', 'a1', 'b1', 'c1'],
    c2: ['b3', 'c3', 'd3', 'b2', 'd2', 'b1', 'c1', 'd1'],
    d2: ['c3', 'd3', 'e3', 'c2', 'e2', 'c1', 'd1', 'e1'],
    e2: ['d3', 'e3', 'f3', 'd2', 'f2', 'd1', 'e1', 'f1'],
    f2: ['e3', 'f3', 'g3', 'e2', 'g2', 'e1', 'f1', 'g1'],
    g2: ['f3', 'g3', 'h3', 'f2', 'h2', 'f1', 'g1', 'h1'],
    h2: ['g3', 'h3', 'g2', 'g1', 'h1'],
    a3: ['a4', 'b4', 'b3', 'a2', 'b2'],
    b3: ['a4', 'b4', 'c4', 'a3', 'c3', 'a2', 'b2', 'c2'],
    c3: ['b4', 'c4', 'd4', 'b3', 'd3', 'b2', 'c2', 'd2'],
    d3: ['c4', 'd4', 'e4', 'c3', 'e3', 'c2', 'd2', 'e2'],
    e3: ['d4', 'e4', 'f4', 'd3', 'f3', 'd2', 'e2', 'f2'],
    f3: ['e4', 'f4', 'g4', 'e3', 'g3', 'e2', 'f2', 'g2'],
    g3: ['f4', 'g4', 'h4', 'f3', 'h3', 'f2', 'g2', 'h2'],
    h3: ['g4', 'h4', 'g3', 'g2', 'h2'],
    a4: ['a5', 'b5', 'b4', 'a3', 'b3'],
    b4: ['a5', 'b5', 'c5', 'a4', 'c4', 'a3', 'b3', 'c3'],
    c4: ['b5', 'c5', 'd5', 'b4', 'd4', 'b3', 'c3', 'd3'],
    d4: ['c5', 'd5', 'e5', 'c4', 'e4', 'c3', 'd3', 'e3'],
    e4: ['d5', 'e5', 'f5', 'd4', 'f4', 'd3', 'e3', 'f3'],
    f4: ['e5', 'f5', 'g5', 'e4', 'g4', 'e3', 'f3', 'g3'],
    g4: ['f5', 'g5', 'h5', 'f4', 'h4', 'f3', 'g3', 'h3'],
    h4: ['g5', 'h5', 'g4', 'g3', 'h3'],
    a5: ['a6', 'b6', 'b5', 'a4', 'b4'],
    b5: ['a6', 'b6', 'c6', 'a5', 'c5', 'a4', 'b4', 'c4'],
    c5: ['b6', 'c6', 'd6', 'b5', 'd5', 'b4', 'c4', 'd4'],
    d5: ['c6', 'd6', 'e6', 'c5', 'e5', 'c4', 'd4', 'e4'],
    e5: ['d6', 'e6', 'f6', 'd5', 'f5', 'd4', 'e4', 'f4'],
    f5: ['e6', 'f6', 'g6', 'e5', 'g5', 'e4', 'f4', 'g4'],
    g5: ['f6', 'g6', 'h6', 'f5', 'h5', 'f4', 'g4', 'h4'],
    h5: ['g6', 'h6', 'g5', 'g4', 'h4'],
    a6: ['a7', 'b7', 'b6', 'a5', 'b5'],
    b6: ['a7', 'b7', 'c7', 'a6', 'c6', 'a5', 'b5', 'c5'],
    c6: ['b7', 'c7', 'd7', 'b6', 'd6', 'b5', 'c5', 'd5'],
    d6: ['c7', 'd7', 'e7', 'c6', 'e6', 'c5', 'd5', 'e5'],
    e6: ['d7', 'e7', 'f7', 'd6', 'f6', 'd5', 'e5', 'f5'],
    f6: ['e7', 'f7', 'g7', 'e6', 'g6', 'e5', 'f5', 'g5'],
    g6: ['f7', 'g7', 'h7', 'f6', 'h6', 'f5', 'g5', 'h5'],
    h6: ['g7', 'h7', 'g6', 'g5', 'h5'],
    a7: ['a8', 'b8', 'b7', 'a6', 'b6'],
    b7: ['a8', 'b8', 'c8', 'a7', 'c7', 'a6', 'b6', 'c6'],
    c7: ['b8', 'c8', 'd8', 'b7', 'd7', 'b6', 'c6', 'd6'],
    d7: ['c8', 'd8', 'e8', 'c7', 'e7', 'c6', 'd6', 'e6'],
    e7: ['d8', 'e8', 'f8', 'd7', 'f7', 'd6', 'e6', 'f6'],
    f7: ['e8', 'f8', 'g8', 'e7', 'g7', 'e6', 'f6', 'g6'],
    g7: ['f8', 'g8', 'h8', 'f7', 'h7', 'f6', 'g6', 'h6'],
    h7: ['g8', 'h8', 'g7', 'g6', 'h6'],
    a8: ['b8', 'a7', 'b7'],
    b8: ['a8', 'c8', 'a7', 'b7', 'c7'],
    c8: ['b8', 'd8', 'b7', 'c7', 'd7'],
    d8: ['c8', 'e8', 'c7', 'd7', 'e7'],
    e8: ['d8', 'f8', 'd7', 'e7', 'f7'],
    f8: ['e8', 'g8', 'e7', 'f7', 'g7'],
    g8: ['f8', 'h8', 'f7', 'g7', 'h7'],
    h8: ['g8', 'g7', 'h7']
};
var Queen_Moves = {
    a1: ['b1', 'c1', 'd1', 'e1', 'f1', 'g1', 'h1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a7', 'a8', 'b2', 'c3', 'd4', 'e5', 'f6', 'g7', 'h8'],
    b1: ['a1', 'c1', 'd1', 'e1', 'f1', 'g1', 'h1', 'b2', 'b3', 'b4', 'b5', 'b6', 'b7', 'b8', 'c2', 'd3', 'e4', 'f5', 'g6', 'h7', 'a2'],
    c1: ['a1', 'b1', 'd1', 'e1', 'f1', 'g1', 'h1', 'c2', 'c3', 'c4', 'c5', 'c6', 'c7', 'c8', 'd2', 'e3', 'f4', 'g5', 'h6', 'b2', 'a3'],
    d1: ['a1', 'b1', 'c1', 'e1', 'f1', 'g1', 'h1', 'd2', 'd3', 'd4', 'd5', 'd6', 'd7', 'd8', 'e2', 'f3', 'g4', 'h5', 'c2', 'b3', 'a4'],
    e1: ['a1', 'b1', 'c1', 'd1', 'f1', 'g1', 'h1', 'e2', 'e3', 'e4', 'e5', 'e6', 'e7', 'e8', 'f2', 'g3', 'h4', 'd2', 'c3', 'b4', 'a5'],
    f1: ['a1', 'b1', 'c1', 'd1', 'e1', 'g1', 'h1', 'f2', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8', 'g2', 'h3', 'e2', 'd3', 'c4', 'b5', 'a6'],
    g1: ['a1', 'b1', 'c1', 'd1', 'e1', 'f1', 'h1', 'g2', 'g3', 'g4', 'g5', 'g6', 'g7', 'g8', 'h2', 'f2', 'e3', 'd4', 'c5', 'b6', 'a7'],
    h1: ['a1', 'b1', 'c1', 'd1', 'e1', 'f1', 'g1', 'h2', 'h3', 'h4', 'h5', 'h6', 'h7', 'h8', 'g2', 'f3', 'e4', 'd5', 'c6', 'b7', 'a8'],
    a2: ['b2', 'c2', 'd2', 'e2', 'f2', 'g2', 'h2', 'a1', 'a3', 'a4', 'a5', 'a6', 'a7', 'a8', 'b3', 'c4', 'd5', 'e6', 'f7', 'g8', 'b1'],
    b2: ['a2', 'c2', 'd2', 'e2', 'f2', 'g2', 'h2', 'b1', 'b3', 'b4', 'b5', 'b6', 'b7', 'b8', 'a1', 'c3', 'd4', 'e5', 'f6', 'g7', 'h8', 'c1', 'a3'],
    c2: ['a2', 'b2', 'd2', 'e2', 'f2', 'g2', 'h2', 'c1', 'c3', 'c4', 'c5', 'c6', 'c7', 'c8', 'b1', 'd3', 'e4', 'f5', 'g6', 'h7', 'd1', 'b3', 'a4'],
    d2: ['a2', 'b2', 'c2', 'e2', 'f2', 'g2', 'h2', 'd1', 'd3', 'd4', 'd5', 'd6', 'd7', 'd8', 'c1', 'e3', 'f4', 'g5', 'h6', 'e1', 'c3', 'b4', 'a5'],
    e2: ['a2', 'b2', 'c2', 'd2', 'f2', 'g2', 'h2', 'e1', 'e3', 'e4', 'e5', 'e6', 'e7', 'e8', 'd1', 'f3', 'g4', 'h5', 'f1', 'd3', 'c4', 'b5', 'a6'],
    f2: ['a2', 'b2', 'c2', 'd2', 'e2', 'g2', 'h2', 'f1', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8', 'e1', 'g3', 'h4', 'g1', 'e3', 'd4', 'c5', 'b6', 'a7'],
    g2: ['a2', 'b2', 'c2', 'd2', 'e2', 'f2', 'h2', 'g1', 'g3', 'g4', 'g5', 'g6', 'g7', 'g8', 'f1', 'h3', 'h1', 'f3', 'e4', 'd5', 'c6', 'b7', 'a8'],
    h2: ['a2', 'b2', 'c2', 'd2', 'e2', 'f2', 'g2', 'h1', 'h3', 'h4', 'h5', 'h6', 'h7', 'h8', 'g1', 'g3', 'f4', 'e5', 'd6', 'c7', 'b8'],
    a3: ['b3', 'c3', 'd3', 'e3', 'f3', 'g3', 'h3', 'a1', 'a2', 'a4', 'a5', 'a6', 'a7', 'a8', 'b4', 'c5', 'd6', 'e7', 'f8', 'c1', 'b2'],
    b3: ['a3', 'c3', 'd3', 'e3', 'f3', 'g3', 'h3', 'b1', 'b2', 'b4', 'b5', 'b6', 'b7', 'b8', 'a2', 'c4', 'd5', 'e6', 'f7', 'g8', 'd1', 'c2', 'a4'],
    c3: ['a3', 'b3', 'd3', 'e3', 'f3', 'g3', 'h3', 'c1', 'c2', 'c4', 'c5', 'c6', 'c7', 'c8', 'a1', 'b2', 'd4', 'e5', 'f6', 'g7', 'h8', 'e1', 'd2', 'b4', 'a5'],
    d3: ['a3', 'b3', 'c3', 'e3', 'f3', 'g3', 'h3', 'd1', 'd2', 'd4', 'd5', 'd6', 'd7', 'd8', 'b1', 'c2', 'e4', 'f5', 'g6', 'h7', 'f1', 'e2', 'c4', 'b5', 'a6'],
    e3: ['a3', 'b3', 'c3', 'd3', 'f3', 'g3', 'h3', 'e1', 'e2', 'e4', 'e5', 'e6', 'e7', 'e8', 'c1', 'd2', 'f4', 'g5', 'h6', 'g1', 'f2', 'd4', 'c5', 'b6', 'a7'],
    f3: ['a3', 'b3', 'c3', 'd3', 'e3', 'g3', 'h3', 'f1', 'f2', 'f4', 'f5', 'f6', 'f7', 'f8', 'd1', 'e2', 'g4', 'h5', 'h1', 'g2', 'e4', 'd5', 'c6', 'b7', 'a8'],
    g3: ['a3', 'b3', 'c3', 'd3', 'e3', 'f3', 'h3', 'g1', 'g2', 'g4', 'g5', 'g6', 'g7', 'g8', 'e1', 'f2', 'h4', 'h2', 'f4', 'e5', 'd6', 'c7', 'b8'],
    h3: ['a3', 'b3', 'c3', 'd3', 'e3', 'f3', 'g3', 'h1', 'h2', 'h4', 'h5', 'h6', 'h7', 'h8', 'f1', 'g2', 'g4', 'f5', 'e6', 'd7', 'c8'],
    a4: ['b4', 'c4', 'd4', 'e4', 'f4', 'g4', 'h4', 'a1', 'a2', 'a3', 'a5', 'a6', 'a7', 'a8', 'b5', 'c6', 'd7', 'e8', 'd1', 'c2', 'b3'],
    b4: ['a4', 'c4', 'd4', 'e4', 'f4', 'g4', 'h4', 'b1', 'b2', 'b3', 'b5', 'b6', 'b7', 'b8', 'a3', 'c5', 'd6', 'e7', 'f8', 'e1', 'd2', 'c3', 'a5'],
    c4: ['a4', 'b4', 'd4', 'e4', 'f4', 'g4', 'h4', 'c1', 'c2', 'c3', 'c5', 'c6', 'c7', 'c8', 'a2', 'b3', 'd5', 'e6', 'f7', 'g8', 'f1', 'e2', 'd3', 'b5', 'a6'],
    d4: ['a4', 'b4', 'c4', 'e4', 'f4', 'g4', 'h4', 'd1', 'd2', 'd3', 'd5', 'd6', 'd7', 'd8', 'a1', 'b2', 'c3', 'e5', 'f6', 'g7', 'h8', 'g1', 'f2', 'e3', 'c5', 'b6', 'a7'],
    e4: ['a4', 'b4', 'c4', 'd4', 'f4', 'g4', 'h4', 'e1', 'e2', 'e3', 'e5', 'e6', 'e7', 'e8', 'b1', 'c2', 'd3', 'f5', 'g6', 'h7', 'h1', 'g2', 'f3', 'd5', 'c6', 'b7', 'a8'],
    f4: ['a4', 'b4', 'c4', 'd4', 'e4', 'g4', 'h4', 'f1', 'f2', 'f3', 'f5', 'f6', 'f7', 'f8', 'c1', 'd2', 'e3', 'g5', 'h6', 'h2', 'g3', 'e5', 'd6', 'c7', 'b8'],
    g4: ['a4', 'b4', 'c4', 'd4', 'e4', 'f4', 'h4', 'g1', 'g2', 'g3', 'g5', 'g6', 'g7', 'g8', 'd1', 'e2', 'f3', 'h5', 'h3', 'f5', 'e6', 'd7', 'c8'],
    h4: ['a4', 'b4', 'c4', 'd4', 'e4', 'f4', 'g4', 'h1', 'h2', 'h3', 'h5', 'h6', 'h7', 'h8', 'e1', 'f2', 'g3', 'g5', 'f6', 'e7', 'd8'],
    a5: ['b5', 'c5', 'd5', 'e5', 'f5', 'g5', 'h5', 'a1', 'a2', 'a3', 'a4', 'a6', 'a7', 'a8', 'b6', 'c7', 'd8', 'e1', 'd2', 'c3', 'b4'],
    b5: ['a5', 'c5', 'd5', 'e5', 'f5', 'g5', 'h5', 'b1', 'b2', 'b3', 'b4', 'b6', 'b7', 'b8', 'a4', 'c6', 'd7', 'e8', 'f1', 'e2', 'd3', 'c4', 'a6'],
    c5: ['a5', 'b5', 'd5', 'e5', 'f5', 'g5', 'h5', 'c1', 'c2', 'c3', 'c4', 'c6', 'c7', 'c8', 'a3', 'b4', 'd6', 'e7', 'f8', 'g1', 'f2', 'e3', 'd4', 'b6', 'a7'],
    d5: ['a5', 'b5', 'c5', 'e5', 'f5', 'g5', 'h5', 'd1', 'd2', 'd3', 'd4', 'd6', 'd7', 'd8', 'a2', 'b3', 'c4', 'e6', 'f7', 'g8', 'h1', 'g2', 'f3', 'e4', 'c6', 'b7', 'a8'],
    e5: ['a5', 'b5', 'c5', 'd5', 'f5', 'g5', 'h5', 'e1', 'e2', 'e3', 'e4', 'e6', 'e7', 'e8', 'a1', 'b2', 'c3', 'd4', 'f6', 'g7', 'h8', 'h2', 'g3', 'f4', 'd6', 'c7', 'b8'],
    f5: ['a5', 'b5', 'c5', 'd5', 'e5', 'g5', 'h5', 'f1', 'f2', 'f3', 'f4', 'f6', 'f7', 'f8', 'b1', 'c2', 'd3', 'e4', 'g6', 'h7', 'h3', 'g4', 'e6', 'd7', 'c8'],
    g5: ['a5', 'b5', 'c5', 'd5', 'e5', 'f5', 'h5', 'g1', 'g2', 'g3', 'g4', 'g6', 'g7', 'g8', 'c1', 'd2', 'e3', 'f4', 'h6', 'h4', 'f6', 'e7', 'd8'],
    h5: ['a5', 'b5', 'c5', 'd5', 'e5', 'f5', 'g5', 'h1', 'h2', 'h3', 'h4', 'h6', 'h7', 'h8', 'd1', 'e2', 'f3', 'g4', 'g6', 'f7', 'e8'],
    a6: ['b6', 'c6', 'd6', 'e6', 'f6', 'g6', 'h6', 'a1', 'a2', 'a3', 'a4', 'a5', 'a7', 'a8', 'b7', 'c8', 'f1', 'e2', 'd3', 'c4', 'b5'],
    b6: ['a6', 'c6', 'd6', 'e6', 'f6', 'g6', 'h6', 'b1', 'b2', 'b3', 'b4', 'b5', 'b7', 'b8', 'a5', 'c7', 'd8', 'g1', 'f2', 'e3', 'd4', 'c5', 'a7'],
    c6: ['a6', 'b6', 'd6', 'e6', 'f6', 'g6', 'h6', 'c1', 'c2', 'c3', 'c4', 'c5', 'c7', 'c8', 'a4', 'b5', 'd7', 'e8', 'h1', 'g2', 'f3', 'e4', 'd5', 'b7', 'a8'],
    d6: ['a6', 'b6', 'c6', 'e6', 'f6', 'g6', 'h6', 'd1', 'd2', 'd3', 'd4', 'd5', 'd7', 'd8', 'a3', 'b4', 'c5', 'e7', 'f8', 'h2', 'g3', 'f4', 'e5', 'c7', 'b8'],
    e6: ['a6', 'b6', 'c6', 'd6', 'f6', 'g6', 'h6', 'e1', 'e2', 'e3', 'e4', 'e5', 'e7', 'e8', 'a2', 'b3', 'c4', 'd5', 'f7', 'g8', 'h3', 'g4', 'f5', 'd7', 'c8'],
    f6: ['a6', 'b6', 'c6', 'd6', 'e6', 'g6', 'h6', 'f1', 'f2', 'f3', 'f4', 'f5', 'f7', 'f8', 'a1', 'b2', 'c3', 'd4', 'e5', 'g7', 'h8', 'h4', 'g5', 'e7', 'd8'],
    g6: ['a6', 'b6', 'c6', 'd6', 'e6', 'f6', 'h6', 'g1', 'g2', 'g3', 'g4', 'g5', 'g7', 'g8', 'b1', 'c2', 'd3', 'e4', 'f5', 'h7', 'h5', 'f7', 'e8'],
    h6: ['a6', 'b6', 'c6', 'd6', 'e6', 'f6', 'g6', 'h1', 'h2', 'h3', 'h4', 'h5', 'h7', 'h8', 'c1', 'd2', 'e3', 'f4', 'g5', 'g7', 'f8'],
    a7: ['b7', 'c7', 'd7', 'e7', 'f7', 'g7', 'h7', 'a1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a8', 'b8', 'g1', 'f2', 'e3', 'd4', 'c5', 'b6'],
    b7: ['a7', 'c7', 'd7', 'e7', 'f7', 'g7', 'h7', 'b1', 'b2', 'b3', 'b4', 'b5', 'b6', 'b8', 'a6', 'c8', 'h1', 'g2', 'f3', 'e4', 'd5', 'c6', 'a8'],
    c7: ['a7', 'b7', 'd7', 'e7', 'f7', 'g7', 'h7', 'c1', 'c2', 'c3', 'c4', 'c5', 'c6', 'c8', 'a5', 'b6', 'd8', 'h2', 'g3', 'f4', 'e5', 'd6', 'b8'],
    d7: ['a7', 'b7', 'c7', 'e7', 'f7', 'g7', 'h7', 'd1', 'd2', 'd3', 'd4', 'd5', 'd6', 'd8', 'a4', 'b5', 'c6', 'e8', 'h3', 'g4', 'f5', 'e6', 'c8'],
    e7: ['a7', 'b7', 'c7', 'd7', 'f7', 'g7', 'h7', 'e1', 'e2', 'e3', 'e4', 'e5', 'e6', 'e8', 'a3', 'b4', 'c5', 'd6', 'f8', 'h4', 'g5', 'f6', 'd8'],
    f7: ['a7', 'b7', 'c7', 'd7', 'e7', 'g7', 'h7', 'f1', 'f2', 'f3', 'f4', 'f5', 'f6', 'f8', 'a2', 'b3', 'c4', 'd5', 'e6', 'g8', 'h5', 'g6', 'e8'],
    g7: ['a7', 'b7', 'c7', 'd7', 'e7', 'f7', 'h7', 'g1', 'g2', 'g3', 'g4', 'g5', 'g6', 'g8', 'a1', 'b2', 'c3', 'd4', 'e5', 'f6', 'h8', 'h6', 'f8'],
    h7: ['a7', 'b7', 'c7', 'd7', 'e7', 'f7', 'g7', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'h8', 'b1', 'c2', 'd3', 'e4', 'f5', 'g6', 'g8'],
    a8: ['b8', 'c8', 'd8', 'e8', 'f8', 'g8', 'h8', 'a1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a7', 'h1', 'g2', 'f3', 'e4', 'd5', 'c6', 'b7'],
    b8: ['a8', 'c8', 'd8', 'e8', 'f8', 'g8', 'h8', 'b1', 'b2', 'b3', 'b4', 'b5', 'b6', 'b7', 'a7', 'h2', 'g3', 'f4', 'e5', 'd6', 'c7'],
    c8: ['a8', 'b8', 'd8', 'e8', 'f8', 'g8', 'h8', 'c1', 'c2', 'c3', 'c4', 'c5', 'c6', 'c7', 'a6', 'b7', 'h3', 'g4', 'f5', 'e6', 'd7'],
    d8: ['a8', 'b8', 'c8', 'e8', 'f8', 'g8', 'h8', 'd1', 'd2', 'd3', 'd4', 'd5', 'd6', 'd7', 'a5', 'b6', 'c7', 'h4', 'g5', 'f6', 'e7'],
    e8: ['a8', 'b8', 'c8', 'd8', 'f8', 'g8', 'h8', 'e1', 'e2', 'e3', 'e4', 'e5', 'e6', 'e7', 'a4', 'b5', 'c6', 'd7', 'h5', 'g6', 'f7'],
    f8: ['a8', 'b8', 'c8', 'd8', 'e8', 'g8', 'h8', 'f1', 'f2', 'f3', 'f4', 'f5', 'f6', 'f7', 'a3', 'b4', 'c5', 'd6', 'e7', 'h6', 'g7'],
    g8: ['a8', 'b8', 'c8', 'd8', 'e8', 'f8', 'h8', 'g1', 'g2', 'g3', 'g4', 'g5', 'g6', 'g7', 'a2', 'b3', 'c4', 'd5', 'e6', 'f7', 'h7'],
    h8: ['a8', 'b8', 'c8', 'd8', 'e8', 'f8', 'g8', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'h7', 'a1', 'b2', 'c3', 'd4', 'e5', 'f6', 'g7']
};
var Rook_Moves = {
    a1: ['b1', 'c1', 'd1', 'e1', 'f1', 'g1', 'h1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a7', 'a8'],
    b1: ['a1', 'c1', 'd1', 'e1', 'f1', 'g1', 'h1', 'b2', 'b3', 'b4', 'b5', 'b6', 'b7', 'b8'],
    c1: ['a1', 'b1', 'd1', 'e1', 'f1', 'g1', 'h1', 'c2', 'c3', 'c4', 'c5', 'c6', 'c7', 'c8'],
    d1: ['a1', 'b1', 'c1', 'e1', 'f1', 'g1', 'h1', 'd2', 'd3', 'd4', 'd5', 'd6', 'd7', 'd8'],
    e1: ['a1', 'b1', 'c1', 'd1', 'f1', 'g1', 'h1', 'e2', 'e3', 'e4', 'e5', 'e6', 'e7', 'e8'],
    f1: ['a1', 'b1', 'c1', 'd1', 'e1', 'g1', 'h1', 'f2', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8'],
    g1: ['a1', 'b1', 'c1', 'd1', 'e1', 'f1', 'h1', 'g2', 'g3', 'g4', 'g5', 'g6', 'g7', 'g8'],
    h1: ['a1', 'b1', 'c1', 'd1', 'e1', 'f1', 'g1', 'h2', 'h3', 'h4', 'h5', 'h6', 'h7', 'h8'],
    a2: ['b2', 'c2', 'd2', 'e2', 'f2', 'g2', 'h2', 'a1', 'a3', 'a4', 'a5', 'a6', 'a7', 'a8'],
    b2: ['a2', 'c2', 'd2', 'e2', 'f2', 'g2', 'h2', 'b1', 'b3', 'b4', 'b5', 'b6', 'b7', 'b8'],
    c2: ['a2', 'b2', 'd2', 'e2', 'f2', 'g2', 'h2', 'c1', 'c3', 'c4', 'c5', 'c6', 'c7', 'c8'],
    d2: ['a2', 'b2', 'c2', 'e2', 'f2', 'g2', 'h2', 'd1', 'd3', 'd4', 'd5', 'd6', 'd7', 'd8'],
    e2: ['a2', 'b2', 'c2', 'd2', 'f2', 'g2', 'h2', 'e1', 'e3', 'e4', 'e5', 'e6', 'e7', 'e8'],
    f2: ['a2', 'b2', 'c2', 'd2', 'e2', 'g2', 'h2', 'f1', 'f3', 'f4', 'f5', 'f6', 'f7', 'f8'],
    g2: ['a2', 'b2', 'c2', 'd2', 'e2', 'f2', 'h2', 'g1', 'g3', 'g4', 'g5', 'g6', 'g7', 'g8'],
    h2: ['a2', 'b2', 'c2', 'd2', 'e2', 'f2', 'g2', 'h1', 'h3', 'h4', 'h5', 'h6', 'h7', 'h8'],
    a3: ['b3', 'c3', 'd3', 'e3', 'f3', 'g3', 'h3', 'a1', 'a2', 'a4', 'a5', 'a6', 'a7', 'a8'],
    b3: ['a3', 'c3', 'd3', 'e3', 'f3', 'g3', 'h3', 'b1', 'b2', 'b4', 'b5', 'b6', 'b7', 'b8'],
    c3: ['a3', 'b3', 'd3', 'e3', 'f3', 'g3', 'h3', 'c1', 'c2', 'c4', 'c5', 'c6', 'c7', 'c8'],
    d3: ['a3', 'b3', 'c3', 'e3', 'f3', 'g3', 'h3', 'd1', 'd2', 'd4', 'd5', 'd6', 'd7', 'd8'],
    e3: ['a3', 'b3', 'c3', 'd3', 'f3', 'g3', 'h3', 'e1', 'e2', 'e4', 'e5', 'e6', 'e7', 'e8'],
    f3: ['a3', 'b3', 'c3', 'd3', 'e3', 'g3', 'h3', 'f1', 'f2', 'f4', 'f5', 'f6', 'f7', 'f8'],
    g3: ['a3', 'b3', 'c3', 'd3', 'e3', 'f3', 'h3', 'g1', 'g2', 'g4', 'g5', 'g6', 'g7', 'g8'],
    h3: ['a3', 'b3', 'c3', 'd3', 'e3', 'f3', 'g3', 'h1', 'h2', 'h4', 'h5', 'h6', 'h7', 'h8'],
    a4: ['b4', 'c4', 'd4', 'e4', 'f4', 'g4', 'h4', 'a1', 'a2', 'a3', 'a5', 'a6', 'a7', 'a8'],
    b4: ['a4', 'c4', 'd4', 'e4', 'f4', 'g4', 'h4', 'b1', 'b2', 'b3', 'b5', 'b6', 'b7', 'b8'],
    c4: ['a4', 'b4', 'd4', 'e4', 'f4', 'g4', 'h4', 'c1', 'c2', 'c3', 'c5', 'c6', 'c7', 'c8'],
    d4: ['a4', 'b4', 'c4', 'e4', 'f4', 'g4', 'h4', 'd1', 'd2', 'd3', 'd5', 'd6', 'd7', 'd8'],
    e4: ['a4', 'b4', 'c4', 'd4', 'f4', 'g4', 'h4', 'e1', 'e2', 'e3', 'e5', 'e6', 'e7', 'e8'],
    f4: ['a4', 'b4', 'c4', 'd4', 'e4', 'g4', 'h4', 'f1', 'f2', 'f3', 'f5', 'f6', 'f7', 'f8'],
    g4: ['a4', 'b4', 'c4', 'd4', 'e4', 'f4', 'h4', 'g1', 'g2', 'g3', 'g5', 'g6', 'g7', 'g8'],
    h4: ['a4', 'b4', 'c4', 'd4', 'e4', 'f4', 'g4', 'h1', 'h2', 'h3', 'h5', 'h6', 'h7', 'h8'],
    a5: ['b5', 'c5', 'd5', 'e5', 'f5', 'g5', 'h5', 'a1', 'a2', 'a3', 'a4', 'a6', 'a7', 'a8'],
    b5: ['a5', 'c5', 'd5', 'e5', 'f5', 'g5', 'h5', 'b1', 'b2', 'b3', 'b4', 'b6', 'b7', 'b8'],
    c5: ['a5', 'b5', 'd5', 'e5', 'f5', 'g5', 'h5', 'c1', 'c2', 'c3', 'c4', 'c6', 'c7', 'c8'],
    d5: ['a5', 'b5', 'c5', 'e5', 'f5', 'g5', 'h5', 'd1', 'd2', 'd3', 'd4', 'd6', 'd7', 'd8'],
    e5: ['a5', 'b5', 'c5', 'd5', 'f5', 'g5', 'h5', 'e1', 'e2', 'e3', 'e4', 'e6', 'e7', 'e8'],
    f5: ['a5', 'b5', 'c5', 'd5', 'e5', 'g5', 'h5', 'f1', 'f2', 'f3', 'f4', 'f6', 'f7', 'f8'],
    g5: ['a5', 'b5', 'c5', 'd5', 'e5', 'f5', 'h5', 'g1', 'g2', 'g3', 'g4', 'g6', 'g7', 'g8'],
    h5: ['a5', 'b5', 'c5', 'd5', 'e5', 'f5', 'g5', 'h1', 'h2', 'h3', 'h4', 'h6', 'h7', 'h8'],
    a6: ['b6', 'c6', 'd6', 'e6', 'f6', 'g6', 'h6', 'a1', 'a2', 'a3', 'a4', 'a5', 'a7', 'a8'],
    b6: ['a6', 'c6', 'd6', 'e6', 'f6', 'g6', 'h6', 'b1', 'b2', 'b3', 'b4', 'b5', 'b7', 'b8'],
    c6: ['a6', 'b6', 'd6', 'e6', 'f6', 'g6', 'h6', 'c1', 'c2', 'c3', 'c4', 'c5', 'c7', 'c8'],
    d6: ['a6', 'b6', 'c6', 'e6', 'f6', 'g6', 'h6', 'd1', 'd2', 'd3', 'd4', 'd5', 'd7', 'd8'],
    e6: ['a6', 'b6', 'c6', 'd6', 'f6', 'g6', 'h6', 'e1', 'e2', 'e3', 'e4', 'e5', 'e7', 'e8'],
    f6: ['a6', 'b6', 'c6', 'd6', 'e6', 'g6', 'h6', 'f1', 'f2', 'f3', 'f4', 'f5', 'f7', 'f8'],
    g6: ['a6', 'b6', 'c6', 'd6', 'e6', 'f6', 'h6', 'g1', 'g2', 'g3', 'g4', 'g5', 'g7', 'g8'],
    h6: ['a6', 'b6', 'c6', 'd6', 'e6', 'f6', 'g6', 'h1', 'h2', 'h3', 'h4', 'h5', 'h7', 'h8'],
    a7: ['b7', 'c7', 'd7', 'e7', 'f7', 'g7', 'h7', 'a1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a8'],
    b7: ['a7', 'c7', 'd7', 'e7', 'f7', 'g7', 'h7', 'b1', 'b2', 'b3', 'b4', 'b5', 'b6', 'b8'],
    c7: ['a7', 'b7', 'd7', 'e7', 'f7', 'g7', 'h7', 'c1', 'c2', 'c3', 'c4', 'c5', 'c6', 'c8'],
    d7: ['a7', 'b7', 'c7', 'e7', 'f7', 'g7', 'h7', 'd1', 'd2', 'd3', 'd4', 'd5', 'd6', 'd8'],
    e7: ['a7', 'b7', 'c7', 'd7', 'f7', 'g7', 'h7', 'e1', 'e2', 'e3', 'e4', 'e5', 'e6', 'e8'],
    f7: ['a7', 'b7', 'c7', 'd7', 'e7', 'g7', 'h7', 'f1', 'f2', 'f3', 'f4', 'f5', 'f6', 'f8'],
    g7: ['a7', 'b7', 'c7', 'd7', 'e7', 'f7', 'h7', 'g1', 'g2', 'g3', 'g4', 'g5', 'g6', 'g8'],
    h7: ['a7', 'b7', 'c7', 'd7', 'e7', 'f7', 'g7', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'h8'],
    a8: ['b8', 'c8', 'd8', 'e8', 'f8', 'g8', 'h8', 'a1', 'a2', 'a3', 'a4', 'a5', 'a6', 'a7'],
    b8: ['a8', 'c8', 'd8', 'e8', 'f8', 'g8', 'h8', 'b1', 'b2', 'b3', 'b4', 'b5', 'b6', 'b7'],
    c8: ['a8', 'b8', 'd8', 'e8', 'f8', 'g8', 'h8', 'c1', 'c2', 'c3', 'c4', 'c5', 'c6', 'c7'],
    d8: ['a8', 'b8', 'c8', 'e8', 'f8', 'g8', 'h8', 'd1', 'd2', 'd3', 'd4', 'd5', 'd6', 'd7'],
    e8: ['a8', 'b8', 'c8', 'd8', 'f8', 'g8', 'h8', 'e1', 'e2', 'e3', 'e4', 'e5', 'e6', 'e7'],
    f8: ['a8', 'b8', 'c8', 'd8', 'e8', 'g8', 'h8', 'f1', 'f2', 'f3', 'f4', 'f5', 'f6', 'f7'],
    g8: ['a8', 'b8', 'c8', 'd8', 'e8', 'f8', 'h8', 'g1', 'g2', 'g3', 'g4', 'g5', 'g6', 'g7'],
    h8: ['a8', 'b8', 'c8', 'd8', 'e8', 'f8', 'g8', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'h7']
};
var Bishop_Moves = {
    a1: ['b2', 'c3', 'd4', 'e5', 'f6', 'g7', 'h8'],
    b1: ['c2', 'd3', 'e4', 'f5', 'g6', 'h7', 'a2'],
    c1: ['d2', 'e3', 'f4', 'g5', 'h6', 'b2', 'a3'],
    d1: ['e2', 'f3', 'g4', 'h5', 'c2', 'b3', 'a4'],
    e1: ['f2', 'g3', 'h4', 'd2', 'c3', 'b4', 'a5'],
    f1: ['g2', 'h3', 'e2', 'd3', 'c4', 'b5', 'a6'],
    g1: ['h2', 'f2', 'e3', 'd4', 'c5', 'b6', 'a7'],
    h1: ['g2', 'f3', 'e4', 'd5', 'c6', 'b7', 'a8'],
    a2: ['b3', 'c4', 'd5', 'e6', 'f7', 'g8', 'b1'],
    b2: ['a1', 'c3', 'd4', 'e5', 'f6', 'g7', 'h8', 'c1', 'a3'],
    c2: ['b1', 'd3', 'e4', 'f5', 'g6', 'h7', 'd1', 'b3', 'a4'],
    d2: ['c1', 'e3', 'f4', 'g5', 'h6', 'e1', 'c3', 'b4', 'a5'],
    e2: ['d1', 'f3', 'g4', 'h5', 'f1', 'd3', 'c4', 'b5', 'a6'],
    f2: ['e1', 'g3', 'h4', 'g1', 'e3', 'd4', 'c5', 'b6', 'a7'],
    g2: ['f1', 'h3', 'h1', 'f3', 'e4', 'd5', 'c6', 'b7', 'a8'],
    h2: ['g1', 'g3', 'f4', 'e5', 'd6', 'c7', 'b8'],
    a3: ['b4', 'c5', 'd6', 'e7', 'f8', 'c1', 'b2'],
    b3: ['a2', 'c4', 'd5', 'e6', 'f7', 'g8', 'd1', 'c2', 'a4'],
    c3: ['a1', 'b2', 'd4', 'e5', 'f6', 'g7', 'h8', 'e1', 'd2', 'b4', 'a5'],
    d3: ['b1', 'c2', 'e4', 'f5', 'g6', 'h7', 'f1', 'e2', 'c4', 'b5', 'a6'],
    e3: ['c1', 'd2', 'f4', 'g5', 'h6', 'g1', 'f2', 'd4', 'c5', 'b6', 'a7'],
    f3: ['d1', 'e2', 'g4', 'h5', 'h1', 'g2', 'e4', 'd5', 'c6', 'b7', 'a8'],
    g3: ['e1', 'f2', 'h4', 'h2', 'f4', 'e5', 'd6', 'c7', 'b8'],
    h3: ['f1', 'g2', 'g4', 'f5', 'e6', 'd7', 'c8'],
    a4: ['b5', 'c6', 'd7', 'e8', 'd1', 'c2', 'b3'],
    b4: ['a3', 'c5', 'd6', 'e7', 'f8', 'e1', 'd2', 'c3', 'a5'],
    c4: ['a2', 'b3', 'd5', 'e6', 'f7', 'g8', 'f1', 'e2', 'd3', 'b5', 'a6'],
    d4: ['a1', 'b2', 'c3', 'e5', 'f6', 'g7', 'h8', 'g1', 'f2', 'e3', 'c5', 'b6', 'a7'],
    e4: ['b1', 'c2', 'd3', 'f5', 'g6', 'h7', 'h1', 'g2', 'f3', 'd5', 'c6', 'b7', 'a8'],
    f4: ['c1', 'd2', 'e3', 'g5', 'h6', 'h2', 'g3', 'e5', 'd6', 'c7', 'b8'],
    g4: ['d1', 'e2', 'f3', 'h5', 'h3', 'f5', 'e6', 'd7', 'c8'],
    h4: ['e1', 'f2', 'g3', 'g5', 'f6', 'e7', 'd8'],
    a5: ['b6', 'c7', 'd8', 'e1', 'd2', 'c3', 'b4'],
    b5: ['a4', 'c6', 'd7', 'e8', 'f1', 'e2', 'd3', 'c4', 'a6'],
    c5: ['a3', 'b4', 'd6', 'e7', 'f8', 'g1', 'f2', 'e3', 'd4', 'b6', 'a7'],
    d5: ['a2', 'b3', 'c4', 'e6', 'f7', 'g8', 'h1', 'g2', 'f3', 'e4', 'c6', 'b7', 'a8'],
    e5: ['a1', 'b2', 'c3', 'd4', 'f6', 'g7', 'h8', 'h2', 'g3', 'f4', 'd6', 'c7', 'b8'],
    f5: ['b1', 'c2', 'd3', 'e4', 'g6', 'h7', 'h3', 'g4', 'e6', 'd7', 'c8'],
    g5: ['c1', 'd2', 'e3', 'f4', 'h6', 'h4', 'f6', 'e7', 'd8'],
    h5: ['d1', 'e2', 'f3', 'g4', 'g6', 'f7', 'e8'],
    a6: ['b7', 'c8', 'f1', 'e2', 'd3', 'c4', 'b5'],
    b6: ['a5', 'c7', 'd8', 'g1', 'f2', 'e3', 'd4', 'c5', 'a7'],
    c6: ['a4', 'b5', 'd7', 'e8', 'h1', 'g2', 'f3', 'e4', 'd5', 'b7', 'a8'],
    d6: ['a3', 'b4', 'c5', 'e7', 'f8', 'h2', 'g3', 'f4', 'e5', 'c7', 'b8'],
    e6: ['a2', 'b3', 'c4', 'd5', 'f7', 'g8', 'h3', 'g4', 'f5', 'd7', 'c8'],
    f6: ['a1', 'b2', 'c3', 'd4', 'e5', 'g7', 'h8', 'h4', 'g5', 'e7', 'd8'],
    g6: ['b1', 'c2', 'd3', 'e4', 'f5', 'h7', 'h5', 'f7', 'e8'],
    h6: ['c1', 'd2', 'e3', 'f4', 'g5', 'g7', 'f8'],
    a7: ['b8', 'g1', 'f2', 'e3', 'd4', 'c5', 'b6'],
    b7: ['a6', 'c8', 'h1', 'g2', 'f3', 'e4', 'd5', 'c6', 'a8'],
    c7: ['a5', 'b6', 'd8', 'h2', 'g3', 'f4', 'e5', 'd6', 'b8'],
    d7: ['a4', 'b5', 'c6', 'e8', 'h3', 'g4', 'f5', 'e6', 'c8'],
    e7: ['a3', 'b4', 'c5', 'd6', 'f8', 'h4', 'g5', 'f6', 'd8'],
    f7: ['a2', 'b3', 'c4', 'd5', 'e6', 'g8', 'h5', 'g6', 'e8'],
    g7: ['a1', 'b2', 'c3', 'd4', 'e5', 'f6', 'h8', 'h6', 'f8'],
    h7: ['b1', 'c2', 'd3', 'e4', 'f5', 'g6', 'g8'],
    a8: ['h1', 'g2', 'f3', 'e4', 'd5', 'c6', 'b7'],
    b8: ['a7', 'h2', 'g3', 'f4', 'e5', 'd6', 'c7'],
    c8: ['a6', 'b7', 'h3', 'g4', 'f5', 'e6', 'd7'],
    d8: ['a5', 'b6', 'c7', 'h4', 'g5', 'f6', 'e7'],
    e8: ['a4', 'b5', 'c6', 'd7', 'h5', 'g6', 'f7'],
    f8: ['a3', 'b4', 'c5', 'd6', 'e7', 'h6', 'g7'],
    g8: ['a2', 'b3', 'c4', 'd5', 'e6', 'f7', 'h7'],
    h8: ['a1', 'b2', 'c3', 'd4', 'e5', 'f6', 'g7']
};
var Knight_Moves = {
    a1: ['b3', 'c2'],
    b1: ['a3', 'c3', 'd2'],
    c1: ['a2', 'b3', 'd3', 'e2'],
    d1: ['b2', 'c3', 'e3', 'f2'],
    e1: ['c2', 'd3', 'f3', 'g2'],
    f1: ['d2', 'e3', 'g3', 'h2'],
    g1: ['e2', 'f3', 'h3'],
    h1: ['f2', 'g3'],
    a2: ['b4', 'c3', 'c1'],
    b2: ['a4', 'c4', 'd3', 'd1'],
    c2: ['a1', 'a3', 'b4', 'd4', 'e3', 'e1'],
    d2: ['b1', 'b3', 'c4', 'e4', 'f3', 'f1'],
    e2: ['c1', 'c3', 'd4', 'f4', 'g3', 'g1'],
    f2: ['d1', 'd3', 'e4', 'g4', 'h3', 'h1'],
    g2: ['e1', 'e3', 'f4', 'h4'],
    h2: ['f1', 'f3', 'g4'],
    a3: ['b5', 'c4', 'c2', 'b1'],
    b3: ['a1', 'a5', 'c5', 'd4', 'd2', 'c1'],
    c3: ['b1', 'a2', 'a4', 'b5', 'd5', 'e4', 'e2', 'd1'],
    d3: ['c1', 'b2', 'b4', 'c5', 'e5', 'f4', 'f2', 'e1'],
    e3: ['d1', 'c2', 'c4', 'd5', 'f5', 'g4', 'g2', 'f1'],
    f3: ['e1', 'd2', 'd4', 'e5', 'g5', 'h4', 'h2', 'g1'],
    g3: ['f1', 'e2', 'e4', 'f5', 'h5', 'h1'],
    h3: ['g1', 'f2', 'f4', 'g5'],
    a4: ['b6', 'c5', 'c3', 'b2'],
    b4: ['a2', 'a6', 'c6', 'd5', 'd3', 'c2'],
    c4: ['b2', 'a3', 'a5', 'b6', 'd6', 'e5', 'e3', 'd2'],
    d4: ['c2', 'b3', 'b5', 'c6', 'e6', 'f5', 'f3', 'e2'],
    e4: ['d2', 'c3', 'c5', 'd6', 'f6', 'g5', 'g3', 'f2'],
    f4: ['e2', 'd3', 'd5', 'e6', 'g6', 'h5', 'h3', 'g2'],
    g4: ['f2', 'e3', 'e5', 'f6', 'h6', 'h2'],
    h4: ['g2', 'f3', 'f5', 'g6'],
    a5: ['b7', 'c6', 'c4', 'b3'],
    b5: ['a3', 'a7', 'c7', 'd6', 'd4', 'c3'],
    c5: ['b3', 'a4', 'a6', 'b7', 'd7', 'e6', 'e4', 'd3'],
    d5: ['c3', 'b4', 'b6', 'c7', 'e7', 'f6', 'f4', 'e3'],
    e5: ['d3', 'c4', 'c6', 'd7', 'f7', 'g6', 'g4', 'f3'],
    f5: ['e3', 'd4', 'd6', 'e7', 'g7', 'h6', 'h4', 'g3'],
    g5: ['f3', 'e4', 'e6', 'f7', 'h7', 'h3'],
    h5: ['g3', 'f4', 'f6', 'g7'],
    a6: ['b8', 'c7', 'c5', 'b4'],
    b6: ['a4', 'a8', 'c8', 'd7', 'd5', 'c4'],
    c6: ['b4', 'a5', 'a7', 'b8', 'd8', 'e7', 'e5', 'd4'],
    d6: ['c4', 'b5', 'b7', 'c8', 'e8', 'f7', 'f5', 'e4'],
    e6: ['d4', 'c5', 'c7', 'd8', 'f8', 'g7', 'g5', 'f4'],
    f6: ['e4', 'd5', 'd7', 'e8', 'g8', 'h7', 'h5', 'g4'],
    g6: ['f4', 'e5', 'e7', 'f8', 'h8', 'h4'],
    h6: ['g4', 'f5', 'f7', 'g8'],
    a7: ['c8', 'c6', 'b5'],
    b7: ['a5', 'd8', 'd6', 'c5'],
    c7: ['b5', 'a6', 'a8', 'e8', 'e6', 'd5'],
    d7: ['c5', 'b6', 'b8', 'f8', 'f6', 'e5'],
    e7: ['d5', 'c6', 'c8', 'g8', 'g6', 'f5'],
    f7: ['e5', 'd6', 'd8', 'h8', 'h6', 'g5'],
    g7: ['f5', 'e6', 'e8', 'h5'],
    h7: ['g5', 'f6', 'f8'],
    a8: ['c7', 'b6'],
    b8: ['a6', 'd7', 'c6'],
    c8: ['b6', 'a7', 'e7', 'd6'],
    d8: ['c6', 'b7', 'f7', 'e6'],
    e8: ['d6', 'c7', 'g7', 'f6'],
    f8: ['e6', 'd7', 'h7', 'g6'],
    g8: ['f6', 'e7', 'h6'],
    h8: ['g6', 'f7']
};
var whi_pawn = {
    a2: ['a3', 'a4', 'b3'],
    b2: ['b3', 'b4', 'a3', 'c3'],
    c2: ['c3', 'c4', 'b3', 'd3'],
    d2: ['d3', 'd4', 'c3', 'e3'],
    e2: ['e3', 'e4', 'd3', 'f3'],
    f2: ['f3', 'f4', 'e3', 'g3'],
    g2: ['g3', 'g4', 'f3', 'h3'],
    h2: ['h3', 'h4', 'g3'],
    a3: ['a4', 'b4'],
    b3: ['b4', 'a4', 'c4'],
    c3: ['c4', 'b4', 'd4'],
    d3: ['d4', 'c4', 'e4'],
    e3: ['e4', 'd4', 'f4'],
    f3: ['f4', 'e4', 'g4'],
    g3: ['g4', 'f4', 'h4'],
    h3: ['h4', 'g4'],
    a4: ['a5', 'b5'],
    b4: ['b5', 'a5', 'c5'],
    c4: ['c5', 'b5', 'd5'],
    d4: ['d5', 'c5', 'e5'],
    e4: ['e5', 'd5', 'f5'],
    f4: ['f5', 'e5', 'g5'],
    g4: ['g5', 'f5', 'h5'],
    h4: ['h5', 'g5'],
    a5: ['a6', 'b6'],
    b5: ['b6', 'a6', 'c6'],
    c5: ['c6', 'b6', 'd6'],
    d5: ['d6', 'c6', 'e6'],
    e5: ['e6', 'd6', 'f6'],
    f5: ['f6', 'e6', 'g6'],
    g5: ['g6', 'f6', 'h6'],
    h5: ['h6', 'g6'],
    a6: ['a7', 'b7'],
    b6: ['b7', 'a7', 'c7'],
    c6: ['c7', 'b7', 'd7'],
    d6: ['d7', 'c7', 'e7'],
    e6: ['e7', 'd7', 'f7'],
    f6: ['f7', 'e7', 'g7'],
    g6: ['g7', 'f7', 'h7'],
    h6: ['h7', 'g7'],
    a7: ['a8', 'b8'],
    b7: ['b8', 'a8', 'c8'],
    c7: ['c8', 'b8', 'd8'],
    d7: ['d8', 'c8', 'e8'],
    e7: ['e8', 'd8', 'f8'],
    f7: ['f8', 'e8', 'g8'],
    g7: ['g8', 'f8', 'h8'],
    h7: ['h8', 'g8']
};
var bla_pawn = {
    a7: ['a6', 'a5', 'b6'],
    b7: ['b6', 'b5', 'a6', 'c6'],
    c7: ['c6', 'c5', 'b6', 'd6'],
    d7: ['d6', 'd5', 'c6', 'e6'],
    e7: ['e6', 'e5', 'd6', 'f6'],
    f7: ['f6', 'f5', 'e6', 'g6'],
    g7: ['g6', 'g5', 'f6', 'h6'],
    h7: ['h6', 'h5', 'g6'],
    a6: ['a5', 'b5'],
    b6: ['b5', 'a5', 'c5'],
    c6: ['c5', 'b5', 'd5'],
    d6: ['d5', 'c5', 'e5'],
    e6: ['e5', 'd5', 'f5'],
    f6: ['f5', 'e5', 'g5'],
    g6: ['g5', 'f5', 'h5'],
    h6: ['h5', 'g5'],
    a5: ['a4', 'b4'],
    b5: ['b4', 'a4', 'c4'],
    c5: ['c4', 'b4', 'd4'],
    d5: ['d4', 'c4', 'e4'],
    e5: ['e4', 'd4', 'f4'],
    f5: ['f4', 'e4', 'g4'],
    g5: ['g4', 'f4', 'h4'],
    h5: ['h4', 'g4'],
    a4: ['a3', 'b3'],
    b4: ['b3', 'a3', 'c3'],
    c4: ['c3', 'b3', 'd3'],
    d4: ['d3', 'c3', 'e3'],
    e4: ['e3', 'd3', 'f3'],
    f4: ['f3', 'e3', 'g3'],
    g4: ['g3', 'f3', 'h3'],
    h4: ['h3', 'g3'],
    a3: ['a2', 'b2'],
    b3: ['b2', 'a2', 'c2'],
    c3: ['c2', 'b2', 'd2'],
    d3: ['d2', 'c2', 'e2'],
    e3: ['e2', 'd2', 'f2'],
    f3: ['f2', 'e2', 'g2'],
    g3: ['g2', 'f2', 'h2'],
    h3: ['h2', 'g2'],
    a2: ['a1', 'b1'],
    b2: ['b1', 'a1', 'c1'],
    c2: ['c1', 'b1', 'd1'],
    d2: ['d1', 'c1', 'e1'],
    e2: ['e1', 'd1', 'f1'],
    f2: ['f1', 'e1', 'g1'],
    g2: ['g1', 'f1', 'h1'],
    h2: ['h1', 'g1']
};