This is a 1 move tsume problem with extra pieces in hand for novices. In a real game of shogi, you usually have several kinds of pieces in hand in the endgame and so you often have to choose an appropriate piece to move or drop. In the diagram, you have a Rook, a kNight and a Lance in hand. What do you think is the correct move to checkmate?
Tip - Theoretically, there are 6 checks as a next move such as +P-6b, +P-5b, +P-4b, R*5b, N*4c and L*4c. The right answer is on of these six moves.