let vr_tmp = new V(game.fen); //start from last position
let dtLastMove = 0;
for (let midx = game.moves.length - 1; midx >= 0; midx--) {
let vr_tmp = new V(game.fen); //start from last position
let dtLastMove = 0;
for (let midx = game.moves.length - 1; midx >= 0; midx--) {