t also a policy distribution for the opponent's expected reply. In ChessCoach I found that an auxiliary head and training target for <em>MCTS value</em> was helpful, but that a <em>reply policy</em> was harmful. Given the relative non-smoothness of chess, it was too painful for the network to guess badly and give a reply for the wrong move, or too difficult to shape the policy from the opponent's perspective at the other side of the board at the same time as the current player's.</p>
        <p>Although I w