<div class='user_solution'><span style="text-align:center;display:block;" class="MsoNormal"><b><span style="font-family: &quot;Times New Roman&quot;;">1.Sg5+ Kg8(!) 2.h7+</span></b><span style="font-family: &quot;Times New Roman&quot;;">/i<b> Kh8 3.Bd6!!</b>/ii <b>g3 4.Be5+ Q:e5 5.Sf7+ K:h7 6.S:e5 g2 7.Sf3 wins</b></span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;"> </span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;">i - A silent move will not win: 2.Kg6? Qb6+ 3.f6 Qb1+ 4.Kh5 Qh1+ is a perpetual check and 2.Be7 gives White a material advantage but no way to win after 2.-Qd5!! 3.h7+ Kg7 4.Bf6+ K:f6 5.h8Q+ K:f5.</span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;"> </span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;">ii - Black is dominated, for example 3.-Q:d6 4.Sf7+ K:h7 5.S:d6 g3 6.Se4 or 6.Sf7 and White stops the pawn just in time after a check on g5. The funny 4.-Kg7?, hoping for the incredibly stupid 5.h8Q+? K:f7 with a draw does not change much and only gives White more ways to win: 5.S:d6 g3 6.Sf7 just wins a tempo, but also 6.f6+ or 6.h8Q+ let White give the important check.</span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;"> </span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;">Compare:</span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;">Gleb Zakhodyakin (Gleb Sachodjakin)</span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;">Shakhmaty Listok 1930, 1^st prize</span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;">White to move and draw</span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;"> </span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;">Solution (only main line): <b>1.g7+ S:g7 2.Sf7+ Kg8 3.Bc5!! f1Q 4.Sh6+ Kh8 5.Bd6!! Qe1 6.Be5 Q:e5 7.Sf7+ Kg8 8.S:e5 draws</b></span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;"> </span></span> <span style="text-align:center;display:block;" class="MsoNormal"><span style="font-family: &quot;Times New Roman&quot;;">My study does have a fork on two squares, but not the ingenious positional draw. The mechanism for domination is similar.</span></span></div>