<div class='user_solution'><b>1. Nd6 !</b>.<br /> Thematic try :<br /> 1. Ne5 ? d2 ! 2. Ng4+ Kf5 3. Nf2 b3 !! [3...Kxf4 ? 4. d6 Ke3 5. Nd1+ Ke2 6. Nb2 ! <br /> (6. d7 ? Kxd1 7. d8=Q K~ =) 6...a4 7. d7 a3 8. d8=Q axb2 9. Qe7+ +-] 4. Nd1 a4 ! 5. d6 a3 6. d7 a2 ! (6...b2 ? 7. d8=Q b1=Q 8. Qg5+ Ke4 9. Qg6+ ! +-) 7. d8=Q a1=Q 8. Qg5+ Ke4 ! =<br /> 1. Ng5 ? Kf5 ! 2. Nf3 Kxf4 3. d6 Kxf3 4. d7 d2 5. d8=Q Ke2(3) =<br /> <b>1....a4 ! </b>(1....b3 ? 2. Nc4 a4 3. d6 a3 4. d7 a2 5. d8=Q+ +-)<br /> <b>2. Nc4 !</b><br /> 2. Ne4+ ? Kf5 ! 3. d6 a3 ! = (3....Kxe4 ? d7 +- )<br /> <b>2....a3</b><br /> <b>3. d6 a2</b><br /> <b>4. d7 a1=Q</b><br /> <b>5. d8=Q+ Kf5 !</b><br /> <b>6. Qg5+ !</b><br /> 6. Qxd3+ ? Kxf4 =<br /> <b>6....Ke4</b><br /> <b>7. Nd2+ !</b><br /> 7. Nd6 ? Kf3 ! 8. Qd5+ Kxf4 =<br /> <b>7....Ke3 </b> <br /> <b>8.f5+ ! and white wins. e</b>g : 8...Ke2 9 f6 Qa8+ 10 Kf7 Qa2+ 11 Kg7 Qxd2 12 Qxd2 Kxd2 13 f7 +-<br /> 8. Nc4+ ? Kf3 ! (8....Ke2 ? 9. Qg2+ and mate in 4 or 8....Kf2 ? 9. Qh4+ Ke2 10. Qg4+ Kf2 <br /> 11. f5 ! +-) 9. Ne5+ Ke4 ! =<br /> <br /> <br /> <br /> <br /></div>