Mate in 1 · No. 239 · Predicted ~1700

Two rooks, bishop and two knights

White to play and mate in one.

Position

White
king on g1, rooks on b1 and e1, bishop on h1, knights on c5 and h5, pawns on b4, c2, d2, e3, f3 and h4
Black
king on f5, queen on b2, rooks on b8 and d7, bishops on d4 and h7, knight on d8, pawns on b5, b6, e5, f6, g6 and g7