RemoteScene-register.tsx

if (elementId === 'register-white') {
  if (!playerBlack) {
    store.dispatch(initSquares()) // let the first player who registers init the board
  }
  store.dispatch(registerPlayer(this.id, true))
} else if (elementId === 'register-black') {
  if (!playerWhite) {
    store.dispatch(initSquares()) // let the first player who registers init the board
  }
  store.dispatch(registerPlayer(this.id, false))
}