Section D2 – h#3
3 solutions
1.Kd5 Kc2 2.Kc4 Nd3 3.Rb5 Ne3# (IM)
1.Rd5 Kb4 2.Kd4 Ne3 3.Rfe5 Nc2# (IM)
1.Rd3+ Kc4 2.Re3 Nd3+ 3.Ke4 Nd2# (IM)
Consecutive Umnov (black-black, rkr, 2)
Echo mates (rotated 90, 2, 0)
Play on same square (B1, 2)
Ideal mate
Echo
Distant self-block
Simple choice of move order (W1, enabling B2) × 2