<tablebase>
   <pieces>
      <mobile color="white" type="king"/>
      <mobile color="black" type="king"/>
      <mobile color="white" type="queen"/>
      <mobile color="black" type="rook"/>
   </pieces>
   <futurebase filename="kqk.htb"/>
   <futurebase filename="krk.htb" colors="invert"/>
</tablebase>
