Twin a)<span lang="FR" style="color: black;"> <br /> 1....Ke5 2.Bc3#. </span> <b><span lang="FR" style="color: black;">Solution: 1. </span></b><b><span lang="EN-US" style="color: black;">Bb4! [2. Qc5#]</span></b><br /> <span lang="EN-US" style="color: black;">1...Kxc4 2.Qc5#!, 1...Ke3 2.Bc5#!</span><br /> <span lang="EN-US" style="color: black;">1...Ke5 2.Bc3#</span><br /> <span lang="EN-US" style="color: black;">1...e3 2.Qf4#</span><br /> <span lang="EN-US" style="color: black;"> </span><br /> <span lang="EN-US" style="color: black;">Twin b) <br /> </span><br /> <span lang="EN-US" style="color: black;">1...c5 2.Qc3#!</span><br /> <b><span lang="EN-US" style="color: black;">Solution: 1. Kb3! </span></b><span lang="EN-US" style="color: black;">[2. Qd6, Be3#]</span><br /> <span lang="EN-US" style="color: black;"><span></span>1...Kc5 2.Be3#!</span><br /> <span lang="EN-US" style="color: black;"><span></span>1...e3 2.Qxe3#!</span><br /> <b><span lang="EN-US" style="color: black;"> </span></b><br />