1. Bb3
The aim is 2. Rh6
1... c4
1. ... e4 2. Qxf5 1 - 0
1. ... f4 2. Qe6 1 - 0
1. ...N5f4 2. Qg7 1 - 0
1. ... N3f4 2. Qg5 1 - 0
1. ... Qxb3 2. fxe8=N 1 - 0
1. ... Qc4 2. fxe8=N 1 - 0
1. ... Qf4 2. Nd7 1 - 0
1. ... Qxg4+ 2. Nxg4 1 - 0
1. ... Ng5 2. Bxg5 1 - 0
2. Qg6 1 - 0