1...Sf3*e5 2.Kf4*e5 Sf5-h4 3.Ke5-d4 Sh4-f3 # (MM)
1...Sf5*e3 2.Kf4*e3 Sf3-h4 3.Ke3-d4 Sh4-f5 # (MM)


Active sacrifice (white) × 2
Analogy (complete)
BK moves only × 2
Chumakov theme (p-p, simplified, 2, 2)
Exchange of functions (bPe3/bPe5, Captured / Passive self-block)
Exchange of functions (wSf3/wSf5, Active sacrifice / Mate)
Many-ways (bK, 2)
Play on the same square (W2, 2)
Zilahi (active, SS, 2)
Model mate × 2