Chess Loop Puzzles

In each of the puzzles below, you are asked to position 2 types of chess pieces on a chess board so that each piece attacks only 1 of the other type of piece (and none of its own type of piece), and the attacks form an alternating loop. An example with 2 bishops and rooks is shown below.

Each puzzle has a unique solution, up to symmetry.

 1 Place 2 knights and kingson a 2×3 chess board. 9. Place 4 bishops and kingson a 5×5 chess board. 2 Place 3 knights and kingson a 4×5 chess board. 10. Place 3 knights and rookson a 3×4 chess board. 3 Place 2 rooks and kingson a 2×4 chess board. 11. Place 5 knights and rookson a 3×8 chess board. 4 Place 3 rooks and kingson a 4×5 chess board. 12. Place 2 knights and queenson a 2×4 chess board. 5 Place 2 bishops and knightson a 3×3 chess board. 13. Place 3 knights and queenson a 3×6 chess board. 6 Place 4 bishops and knightson a 4×4 chess board. 14. Place 3 knights and queenson a 4×5 chess board. 7 Place 3 bishops and knightson a 3×5 chess board. 15. Place 4 knights and queenson a 4×7 chess board. 8 Place 4 bishops and kingson a 4×6 chess board.