underCheck(square_s, oppCols) {
if (this.stage == 2 && oppCol != this.sideCheckered)
return false; //checkered pieces is me, I'm not under check
underCheck(square_s, oppCols) {
if (this.stage == 2 && oppCol != this.sideCheckered)
return false; //checkered pieces is me, I'm not under check