Section D2 – h#3
2 solutions
1.f2 Bc7 2.Qg3 Nxc3+ 3.Kf3 Rxg3# (MM)
1.d3 Rh5 2.Qc5 Nd2+ 3.Kd4 Bxc5# (MM)
Active sacrifice (black, delayed) × 2
Anti-Bristol (mixed) × 2
Exchange of functions (bPf3/bPd4, Passive / Self-block + Line opening)
Exchange of functions (wRh3/wBb6, Guard / Mate)
Orthogonal-diagonal transformation
Model mate × 2