<div class='user_solution'><div><b>1. Rd5+!  Rxd5 2. c4+!</b> (2. f8=Q? Rh5+ 3. Kg6 Rdg5+ 4. Kf6 Rf5+ 5. Ke7 Rxf8 =) <b>2... Kxc4 3. f8=Q Rh5+ 4. Kg7 Rhg5+</b> switchback <b>5. Kh8 </b>(5. Kf6? Rgf5+ 6. Ke7 Rxf8 =) <b>5... Rh5+</b> switchback<b> 6. Bh7 Rdg5 7.Qd6!</b> zz <b>Kb5 8. Qc7!</b> zz <b>Ka6 9. Qb8! </b>zz (9. Qc6+? Ka7 10. Qc7+ Ka8! = ) <b>9... Ka5 10. Qb7 </b>(10. Qd6 Kb5 11. Qc7 Ka6 12. Qb8 Ka5 13. Qb7 +- as main line - it is only waste of time} <b>10... Ka4 11. Qb6 Ka3 12. Qd4 Kb3 13. Qe4!</b>  (13. Qf4? Kc3! zz 14. Qe4 Kd2! =) <b>13... Kc3 14.Qf4! </b>zz <b>Kb3 15. Qd4</b> switchback <b>Ka3 16.Qc4</b> <b>and wins, </b>for example 17. - Kb2 18.Qd3 (or 18.Qb4+) Ka2 19.Qc3 Rc5 20.Qd2+ +-</div><div><br /></div><div>Meredith. Sacrifices. Swithcbacks. Reciprocal zugzwangs.</div><br /></div>