In each of the puzzles below, you are asked to position 2 types of chess pieces on a chess board so that the pieces attack only the other type of piece. All puzzles copyright Erich Friedman, 2008.

## 1. |
Place 2 rooks and 4 kings on a 3×4 chess board so that
each rook attacks 3 kings, and each king attacks 1 rook. |

## 2. |
Place 4 bishops and 4 knights on a 4×4 chess board so that
each bishop attacks 2 knights, and each knight attacks 2 bishop. |

## 3. |
Place 4 rooks and 4 queens on a 4×4 chess board so that
each rook attacks 2 queens, and each queen attacks 3 rooks. |

## 4. |
Place 2 knights and 4 queens on a 4×5 chess board so that
each knight attacks 2 queens, and each queen attacks 1 knight. |

## 5. |
Place 2 bishops and 8 knights on a 4×5 chess board so that
each bishop attacks 4 knights, and each knight attacks 1 bishop. |

## 6. |
Place 2 kings and 8 bishops on a 4×5 chess board so that
each king attacks 5 bishops, and each bishop attacks 1 king. |

## 7. |
Place 2 bishops and 4 queens on a 4×6 chess board so that
each bishop attacks 3 queens, and each queen attacks 1 bishop. |

## 8. |
Place 2 queens and 5 rooks on a 4×6 chess board so that
each queen attacks 5 rooks, and each rook attacks 1 queen. |

## 9. |
Place 2 queens and 6 kings on a 4×6 chess board so that
each queen attacks 5 kings, and each king attacks 1 queen. |

## 10. |
Place 2 knights and 6 rooks on a 5×5 chess board so that
each knight attacks 3 rooks, and each rook attacks 1 knight. |

## 11. |
Place 8 knights and 6 rooks on a 5×5 chess board so that
each knight attacks 2 rooks, and each rook attacks 3 knights. |

## 12. |
Place 8 bishops and 2 queens on a 5×6 chess board so that
each bishop attacks 1 queens, and each queen attacks 7 bishops. |

## 13. |
Place 2 rooks and 6 bishops on a 5×6 chess board so that
each rook attacks 3 bishops, and each bishop attacks 1 rook. |