<div class='user_solution'><b><span lang="ES-TRAD" style="font-size: 12pt; color: black;">Solution:</span></b><br /> <b><span lang="ES-TRAD" style="font-size: 12pt; color: black;"> </span></b><br /> <b><span lang="ES-TRAD" style="color: black;">1.Nb8!</span></b><br /> <b><span lang="ES-TRAD" style="color: black;"> </span></b><br /> <b><span lang="IT" style="color: black;">1…,Kc5; 2.Qe7,Kc4; 3.Qa3,e4/Kd4; 4.Qc3/b4++ If 2…,Kb6; 3.Nd5,Ka5; 4.Qb4++</span></b><br /> <b><span lang="IT" style="color: black;"> </span></b><br /> <b><span lang="IT" style="color: black;">1…,f2; 2.Kc3,f1=Q; 3.Qd7,Kc5; 4.Qc6++ If 2…,e4; 3.Kd4,e3/f1=Q;</span></b><b><span lang="IT" style="color: red;"> 4.Qd7/e5++</span></b><b><span lang="IT" style="color: black;"></span></b><br /> <b><span lang="IT" style="font-size: 12pt; color: black;"> </span></b><br /></div>