Give checkmate! — Various Numbers of Chessmen

A mate-in-N collection with various numbers of chessmen where at least three pieces cooperate in giving mate. The puzzles are grouped into sets according to the number of chessmen present on the chessboard.

1. Up to 8 chessmen
Checkmate the opponent’s king with at least three cooperating chessmen in the presence of at most eight chessmen on the chessboard.

2. 9 – 12 chessmen
Checkmate the opponent’s king with at least three cooperating chessmen in the presence of 9-12 chessmen on the chessboard.

3. 13 – 16 chessmen
Checkmate the opponent’s king with at least three cooperating chessmen in the presence of 13-16 chessmen on the chessboard.

4. 17 – 20 chessmen
Checkmate the opponent’s king with at least three cooperating chessmen in the presence of 17-20 chessmen on the chessboard.

5. 21 – 32 chessmen
Checkmate the opponent’s king with at least three cooperating chessmen in the presence of 21-32 chessmen on the chessboard.