A problem which may not prove that difficult to solve, but which
contains a remarkable amount of play.
1.Qxh2 threatens 2.Qh8 with capture of the rook to follow. If the e6 rook moves sideways it defeats the threat by threatening a check, but the removal of the possibility of Rxe5+ frees the e2 bishop to shut off the rook, hence the fourfold duel 1...Rd6 2.Bd3 threat 3.Qa2, 1...Rf6 2.Bf3, 1...Rg6 2.Bg4 and 1...Rh6 2.Bh5. If the black pawns advance two squares they clear a line for the e6 rook to defeat the threat by guarding the back rank, but they also cut off the rook in the opposite direction, leading to a second duel between the pawns and the king – 1...d5 2.Kd2 threat 3.Ra1, 1...f5 2.Kf2, 1...g5 2.O-O. There are two further variations, 1...Rxe5 2.Qxe5 threat 3.Qa1 and 1...d6 threatening to take the c5 knight, after which White exploits the unguard and interference with the rook, 2.b7+ Ka7 3.Sxc6.
Jacob Hoover: Most of the defences involve line play of some sort. I thought the castling move was a nice touch.