<p><font size="3"><b>1.Bd3 Sxg5 2.Kxg5 Sd4 3.Kh4 Sf3#</b> (MM) </font></p> <p><font size="3"><b>1.Rd3 Sxg3 2.Kxg3 Sd4 3.Kh4 Sf5#</b> (MM) </font></p> <p><br /></p> <p><font size="3">Active sacrifice (white) × 2 </font></p> <p><font size="3">Analogy (complete) </font></p> <p><font size="3">Chumakov theme (p-b, simplified, 2, 2) </font></p> <p><font size="3">Exchange of functions (bBb1/bRa3, Interfered / Interfering) </font></p> <p><font size="3">Exchange of functions (bBg3/bPg5, Captured / Passive self-block) </font></p> <p><font size="3">Exchange of functions (wSf3/wSf5, Active sacrifice / Mate) </font></p> <p><font size="3">Grimshaw (black) </font></p> <p><font size="3">Many-ways (bK, 2) </font></p> <p><font size="3">Play on the same square (B1, 2) </font></p> <p><font size="3">Play on the same square (W2, 2) </font></p> <p><font size="3">Zilahi (active, SS, 2) </font></p> <p><font size="3">Model mate × 2</font></p><br /><br />