Solution to chess problem number 7
The theme of this problem is self-blocks by black. In these the escape square for the black king is blocked by one of his own pawns which allows a mate to occur which would otherwise be impossible. White must also play a precise waiting move with his queen in readiness to exploit these pawn moves. The latter might be the novel feature of this problem as self-blocks are a well worked theme. This is another early problem being my second composed and published problem.
Key move 1. Bd2 no threat.
1...d5 2. Qg4 d4 3. Qe2 mate.
.....................bxc5 3. Nxc5 mate.
.....................a2 3. Nb2 mate.
1...bxc5 2. Qf4 c4 3. Qe3 mate.
.........................d5 3. Nxc5 mate
.........................a2 3.Nb2 mate.
1...dxc5 2. Qf4 etc.