if Rd7 n Bc7 then i think best move 4 black is g5 when white move Rd7 at first place... the point to move g5 is block the queen so that the king can move to f6 n prevent mate in 2..
with Q h6 i am not sure of checkmate in 2 , king moves to f6 ....mmm and after?
with Qe7 I think all is possible to checkmate in 2 moves with rook if white bishop is silent or queen if necessary, no escape, no?
if king move to f6 then Rxf5... its a mate... cant escaped anymore if white move Qh6 at first place...
hmmm... i cant get what do u mean by (with rook if white bishop is silent or queen if necessary) can u show me example?? but i think if Qe7 the best move black will go is Nf2... then white cant mate in 2...