<div class='user_solution'><p style="margin-bottom: 0cm;"><br /> </p> <p style="margin-bottom: 0cm;"><b>1. c5 Kh5</b></p> <p style="margin-bottom: 0cm;"><b>2. c6 Kg4 !</b></p> <p style="margin-bottom: 0cm;"><b>3. c7 !</b></p> <p style="margin-bottom: 0cm;">Thematic try : 3. cxb7 ? Kf3 4. b8=Q ! (b8=R ? h2+(d3) -+) 4....h2+ 5. Kh1 g2+ 6. Kxh2 Kf2</p> <p style="margin-bottom: 0cm;">7. f5 g1=Q+ 8. Kh3 = e.g. 8....Qh1+ 9. Kg4 Qg1+ 10. Kh5 Qd1+ ! 11. Kg6 Qg4+ </p> <p style="margin-bottom: 0cm;">12. Kf7 Qxf5+ 13. Kxg7 Qg5+ = perpetual check.</p> <p style="margin-bottom: 0cm;"><b>3....Kf3</b></p> <p style="margin-bottom: 0cm;"><b>4. c8=Q !</b></p> <p style="margin-bottom: 0cm;">4. c8=R ? h2+(a5) -+</p> <p style="margin-bottom: 0cm;"><b>4....h2+</b></p> <p style="margin-bottom: 0cm;"><b>5. Kh1 g2+ ! </b> </p> <p style="margin-bottom: 0cm;"><b>6. Kxh2 Kf2</b> </p> <p style="margin-bottom: 0cm;"><b>7. Qg4 ! +-</b></p> <p style="margin-bottom: 0cm;">7. Kh3 ? g1=Q 8. Kh4 = e.g. 8....Qg3+ 9. Kh5 Kxe3 ! 10. Qxb7 Kxf4 11.Qc7+ Kf3 ! =</p> <p style="margin-bottom: 0cm;"><br /> </p> <p style="margin-bottom: 0cm;"><br /> </p> <p style="margin-bottom: 0cm;">Illustration of « the small difference » : 3. c7 ! 3. cxb7 ?</p></div>