# Is it possible to compose a checkmate with king and any three minor pieces against bare king in the center of the board?

I am running a small chess school for beginners. During a class I asked a child to compose a checkmate position using only king, bishop and knight against the opposing king in a corner. Then I made the task tougher by placing the opposing king in the middle edge. And finally I asked him on purpose to try the same in the center of the board, to see if he was able to conclude that the task was impossible. Not only he did, but he also proposed to try the task in the center of the board with a third minor piece. To my surprise, this task seems to be impossible as well. We tried with any combination of three minor pieces plus the king. Is it true that this task is not possible?

• Are you asking about three specific minor pieces, or any three? Oct 25, 2021 at 19:16
• @RobbieGoodwin Any three, as per the title. Could be three of the same kind. The given answer covers this case. Oct 26, 2021 at 16:55
• How does "three of the same kind" work, except for pawns? Oct 31, 2021 at 23:27
• @RobbieGoodwin The possible combinations are: 2 knight and a bishop, 2 knights and the opposite coloured bishop, or 2 bishops and a knight, or three knights, or three bishops. Pawns are not considered minor pieces -> en.wikipedia.org/wiki/Glossary_of_chess Nov 1, 2021 at 17:38
• Thanks and sorry I was silly enough to assume you were working only with the starting pieces! Nov 5, 2021 at 13:11