this.afterPlay = (move_s, newTurn, ops) => {
// Movestack contains only one move:
move_s[0].toplay = this.getRandomPiece(this.turn);
this.afterPlay = (move_s, newTurn, ops) => {
// Movestack contains only one move:
move_s[0].toplay = this.getRandomPiece(this.turn);