<div class='user_solution'><div><div><b>1.Re7+ Kd8 2.Rxd7+! </b>[2.Rxe6? Rb1+ 3.Ka7 Ra3#] <b>2...Qxd7 3.Be7+ Qxe7! </b>[3...Rxe7 4.dxe7+ Qxe7 5.Qd4+ Ke8 6.Qxg1=] <b>4.dxe7+ Kd7 </b>[4...Rxe7 5.Qd4+=] <b>5.e8Q+! </b>[5.Qb2? or Qd4+ 5...Kxe7–+] <b>5...Kxe8 6.Ka8! </b>zz <b>6...Kd8 </b>[6...Ra3+ 7.Kb7= as main line] <b>7.Qa7! </b>zz <b>7...Kc8 8.Qb7+ </b>[8.Qa4? Kc7!–+; 8.Qc5+? Kd7!–+] <b>8...Kd8 9.Qa7! </b>zz, switchback <b>9...Ke8 10.Qg7! </b>zz, switchback <b>10...Ra3+ 11.Kb7 </b>[11.Kb8? Rb1+ 12.Kc8 Ra8+–+] <b>11...Rb1+ 12.Kc6 </b>[12.Kc7? Ra7+–+] <b>12...Ra6+ 13.Kc5! draw</b> [13.Kd5? Nf4+ 14.Ke5 Re6+–+].</div><div><br /></div><div>Meredith. Sacrifice. Reciprocal zugzwangs. Switchbacks.</div></div><br /></div>