XNX
       +---------
QHXHQX | PFTNHRQF
        -QHXHQX
         ======
         XHXQPQQ
        -XTFTXNN
         =======
          XXNRTTF
         - QHXHQX
          =======
           TRHRQP

base: 8
letters: FHNPQRTX
difficulty: hard