Mate in 3 · No. 236 · Harder

Two rooks and two bishops

White to play and mate in three.

Position

White
king on a4, rooks on b5 and f8, bishops on c7 and f7, pawns on b4 and c3
Black
king on a6, rook on b3, bishop on e1, knight on f1, pawns on a3, b6 and d6