Mate in 3 · No. 276 · Harder

Two rooks and bishop

White to play and mate in three.

Position

White: king on h1, rooks on e7 and g1, bishop on e3, pawns on c2, d6, d7 and h2
Black: king on g8, rooks on a5 and f8, pawns on b6, b7, g7 and h4