const dropMove = (typeof i1 == "string");
const startArray = (dropMove ? this.r_pieces : this.g_pieces);
let startPiece = startArray[i1][j1];
const dropMove = (typeof i1 == "string");
const startArray = (dropMove ? this.r_pieces : this.g_pieces);
let startPiece = startArray[i1][j1];