Endgame : Checkmate with bishop and knight

Bishop & Knight:
In this case checkmate is a difficult possibility. The two pieces cannot form a linear barrier to the opponent's king and thus the checkmate only occurs in the corner controlled by the bishop. We get two checkmate positions with these two pieces. The first position is a checkmate by the bishop, the king being in the corner. The second position is created by the knight, the king being in a side square next to the corner. The bishop and king moving on the side, the checkmate can occur at the end of 33 moves from the starting position.