+--+--+--+--+
     |1 |2 |3 |4 |       
  +--+--+--+--+--+--+
  |5 |           |6 |    
  +--+--+--+--+--+--+
     |7 |8 |9 |10|
     +--+--+--+--+

1. A sat opposite G who was sitting next to C.
2. C sat opposite F.
3. D sat between F and H, but not in seat 8 or 9.
4. E sat between G and A and opposite J.
5. I sat between B and C but not in seat 9.
6. The host sat in seat 5.