In the helpmate (h#1-6.5), six pieces of different kinds (K, Q, R, B, S, and P) make exactly one move in one solution or in different solutions. Thematic pieces can be white, black, or both colors.
This is the theme of the 6th Azemmour TT (Ohrid, 2018).
Shorokhov, Boris
Azemmour TT-6, Ohrid, 2018
4th HM
a) 1.Rxd2
Kxd2
2.f6
Ke3
3.Sf7
Kxf3
4.Ke6
Ke4
5.Qe7
f4
6.Bd7
f5#
b) 1.Rxf2
Kxf2
2.Qc7
Ke3
3.Sd7
Kxd3
4.Kc6
Kc4
5.b6
d4
6.Bb7
d5#
FEN: 2b5/1p1q1p2/3p4/p2kn3/8/1p1p1p2/r2P1P1r/2n1K3
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