ecause chess is a very discrete game, so these planes can be packed in transit into 64-bit whole numbers. This saves space and time and aligns perfectly with the way high-performance code manages chess boards, positions and rules; that is, using <em>bitboards</em> (see Figure 5).</p>

        <figure>
            <img src="figure5.png" />
            <figcaption>Figure 5: This &quot;white pawns&quot; input plane is represented using the bitboard number 219,210,240.</figcaption>
        </figure>

        <p