<div class="user_solution"><div><b>1. Bc4!</b> </div><div>1. b4+? Kb5! 2. Bc4+ Ka4 = zz with White to move</div><div><b>1... Ka4 </b></div><div>1... Kb6 eg 2. b4+- </div><div><b>2. b4</b> zz with Black to move</div><div>2. Kc2? Kb4= </div><div><b>2...Ka3 3. b5 Nb3! 4. b6 </b></div><div>4. Bxb3? Stalemate</div><div><b>4... Nc5 5. Bb3! </b><br />White too sacrifices on b3, showing the Umnov theme.</div><div>Logical try: <br />5. Bb5? Ne4+ 6. Kd4 Nd6 7. Kd5 Nb7 8. Kc6 Na5+ = White cannot use the b5 square for his king to push away the knight from a5.</div><div><b>5... Ne4+ </b><br /></div><div><div>White now wins with the plan outllined below. The key position after Black&#39;s 17th move</div><div>can be reached in a number of ways.</div></div><div><b>6. Kc4 Nd6+ 7. Kc5 Nb7+ 8. Kc6 Na5+ 9. Kb5</b> <br />The king has access to this square thanks to White&#39;s 5th move.</div><div><b>9... Nb7 </b></div><div>Now White must cover both e6 and b7 with the bishop from c8.</div><div><b>10. Be6 Nd8 11. Bc8 Kb3 <br /></b>White&#39;s king can approach.<b><br />12. Kc5 </b><b>Ka4 13. Kd6 Ka5 14. Kc7 Kb5 15. Bg4 Ka5</b></div><div>15...Kc5 16. Bd7! </div><div><b> 16. Bh3 Kb5 17. Bf1+ Kc5 </b></div><div>Finally Black must be put in zugzwang.The winning plan up to now and the following trick is known from Vandecasteele 2012, Schaakstudiespinsels-2#061,</div><div>HHDBVI #8515. And even from the game Reshevsky - Ivkov, Palma de Mallorca 1970.</div><div>www.chessgames.com/perl/chessgame?gid=1063192<br /><b>18. Bc4!</b></div><div>White begins and ends the study with this move trappping knights on c1 and d8.</div><div><b>18... Nc6 19. b7 +- 1-0</b></div><div><b><br /></b></div><div><b><br /></b></div><div>Vegetarian malyutka with Black and White sacrifices on the same square.</div></div><div><br /></div><br /><br />