if (oldKingPP) {
// Search king in appear array:
newKingPP =
m.appear.find(a => this.isKing(0, 0, a.p) && a.c == color);
if (newKingPP) {
if (oldKingPP) {
// Search king in appear array:
newKingPP =
m.appear.find(a => this.isKing(0, 0, a.p) && a.c == color);
if (newKingPP) {