Try :

1. Bxb4 ? Blocus.

1.....Kc2 ? 2. Re3 ! Kd1 3. Bb3 #

1.....Kd4 ! 2. Bb3 Kd3 and mate in 2

Solution :

1. Rd8 ! Blocus

Thematic variants :

1....Kd4 2. Bb3 discovery + ! Ke4 3. Bc2 #

1....Kd2 2. Bxf3 discovery + ! Kc2 3. Bd1 # pure mate

2....Ke1 3. Rd1 # pure mate (not thematic)

1....b3 2. Bxf3 discovery + ! Kc4 3. Be2 # selfblock pawn b3

Not thematic variants :

1....Kc2 2. Be6 ! b3 3. Bxf5 # selfblock pawn b3

1....Ke2 2. Bc4+ Ke1 3. Bxb4 #

Commentary :

The same white piece gives a discovery check, leaving a flight square for black King

and mates on this square.

Three thematic variants and two not thematic.

Six distincts mates. Meredith.