<font size="4"><b>1...Sf3*e5 2.Kf4*e5 Sf5-h4 3.Ke5-d4 Sh4-f3 # </b>(MM) <br /><b>1...Sf5*e3 2.Kf4*e3 Sf3-h4 3.Ke3-d4 Sh4-f5 # </b>(MM<b>) </b><br /><br /><br />Active sacrifice (white) × 2 <br />Analogy (complete) <br />BK moves only × 2 <br />Chumakov theme (p-p, simplified, 2, 2) <br />Exchange of functions (bPe3/bPe5, Captured / Passive self-block) <br />Exchange of functions (wSf3/wSf5, Active sacrifice / Mate) <br />Many-ways (bK, 2) <br />Play on the same square (W2, 2) <br />Zilahi (active, SS, 2) <br />Model mate × 2</font><br /><br /><br /><br /><br /><br /><br />