Helpmates with twin by moving black king 6

a) 1.Se8 fxe8S 2.Bd5 Sd6#
b) 1.Be8 fxe8B 2.Sf5 Bc6#
c) 1.Qg8 fxg8Q 2.Kh5 Qg5#

Judge Wladyslaw Rosolak:
Economical position showing 3 "switchbacks" after promotion changing colour of piece.

Juraj Lörinc:
What is the role of all black pieces in c) position?

a) 1.Bd5 Ba6 2.Qc7 Rh8#
b) 1.Rd5 Rc1 2.Qe2 Rf3#

Judge Wladyslaw Rosolak:
Interesting strategical combination: selfpin, interference, pin, blocking along pin line.

a) 1.fxe4 Kxe4 2.Rxc4 Rg1#
b) 1.Rxc4 Kxc4 2.Bb6 Ra1#
c) 1.Bb6 Kxd6 2.fxe4 Rf8#

Judge Wladyslaw Rosolak:
Interesting cycle of black moves in economical position.

Juraj Lörinc:
Saying 'economical position' shows himself to be rather unsuccessful - sometimes position with 25 pieces could be considered economical just because the idea needs so much pieces. Here you see 14 pieces - not even meredith - and some of them are clearly unused in some positions.

a) 1.Bf1 Ra2 2.Bg2 Be6#
b) 1.Be2 Be6 2.Bg4 Ra2#

Judge Wladyslaw Rosolak:
Change of white moves order in economical position joined with unpinnings of white pieces.

Juraj Lörinc:
For me very poor composition that shows almost nothing.

a) 1.Qxe1 Rd5 2.Rc7 Rd6#
b) 1.Qxh5 Bc7 2.Rd5 Rc1#
c) 1.Qxh2 Re6 2.Rfd8 Rc5#

Judge Wladyslaw Rosolak:
Black cyclically captures white pieces and opens same time square e5, this opens lines for 1st white moves by right piece.

a) 1.Rb7 Bb5+ 2.Kb6 Sxd5#
b) 1.Bg6 Se4+ 2.Kf5 Bc8#
c) 1.Rh1 Bf1+ 2.Kg1 Se2#

Judge Wladyslaw Rosolak:
Unified strategic complex, queen line openings and its closings by white.

a) 1.Rxh4 Rxh8 2.Rh3 Qg8#
b) 1.Qc1 Bf3 2.Bd2 Qe4#

Judge Wladyslaw Rosolak:
Bristols by both sides in two phases.

a) 1.Sxd5+ Sg5 2.Kd2 Sf3#
b) 1.Bxd5+ Sf6 2.Kd6 Se8#

Judge Wladyslaw Rosolak:
Two unified variations with unpin of white piece (that just closed check line) by black king.

Juraj Lörinc:
This one I rate much better than previous - nothing monotonous, although again some unused pieces in respective phases could be found.