<div>1. Lc5+? Ke5 2. Ld4+ Kxd4!/Kd6! (2...Kf4/5? 3.Tf6#)</div><div>without wPe6 : 1. Lc5+ Ke5 2. Ld4+ Kxd4 3. Td6+ Ke54. Sc4+ Kf4/5 5.Tf6#) </div><div>If the white Rook stands on f6 and the square f5 is guarded then </div><div>1. Lc5+? Ke5 2. Tf5+ Kxe6 and the wPe6 is captured </div><div>So: </div><div>First step bring the Rook to f6 </div><div><b>1. Tf6! Sg6</b> </div><div>second step a guard for f5 </div><div><b>2. Lc5+ Ke5 3. Sc4+ Kd5 4. Sxe3+ Ke5 </b></div><div>third step black king must capture wPe6 </div><div><b>5. Tf5+ Kxe6 6. Tf6+ Ke5 7. Sc4+ Kd5 8. Sb6+ Ke5 9. Ld6+ Kd4 </b></div><div>the wPe6 is missing but also the bPe3 is missing soa block is needed </div><div><b>10. e3+ Txe3 </b></div><div>and at last the main play </div><div><b>11. Lc5+ Ke5 12. Ld4+ Kxd4 13. Td6+ Ke5 14. Sc4+ Kf4/5 15. Tf6# </b></div><div>The first move is also the last one </div><br />