const p = this.getPiece(a.x, a.y);
m.appear.push(new PiPo({x: a.x, y: a.y, c: color, p: p}));
m.vanish.push(new PiPo({x: a.x, y: a.y, c: oppCol, p: p}));
const p = this.getPiece(a.x, a.y);
m.appear.push(new PiPo({x: a.x, y: a.y, c: color, p: p}));
m.vanish.push(new PiPo({x: a.x, y: a.y, c: oppCol, p: p}));