My works 151 - 156

a) 1.e6! Qf1+ 2.rSg2 Qf7 3.e7 Qf1 4.rSe3 Qf8 5.e8Q! Qf1 6.rSg2+ Qf8 7.Qe3 Qf4 8.Qd3 Qc4 9.Qh3 Qh4 10.Qh1 Qe1 11.rSe3 Qg1# (5.e8R? ... 8...Qf1!)

b) 1.g6! Qh1+ 2.rSf3 Qh7 3.rSg5 Qh1 4.rSf7 Qh7+ 5.g7 Qh1 6.g8R+! Qh8 7.Rg7 Qe8+ 8.rSh6 Qh5+ 9.Rg4 Qf5 10.Rg3 Qh7 11.rSg4 Qh4# (6.g8Q? ... 12.Qxh4!)

Differentiation by means of lack of space near edge of board. I like the way of ruling out the wrong promotion.

Personal rating: C.

a) 1.Rf4 Be6+ 2.Ke4 Re3#

b) 1.Bc3 Rg5+ 2.Kc4 Bb5#

Simple model mates after unpins.

Personal rating: D.

1...Ge4 2.Gxg5+ S~f5#
1.Qxc3! th. 2.Qd3+ Ge1# (2.Qe3+? KAxd2!)
1...KAd8 2.Qe3+ Ge1# (2.Qd3+? KAxd2!)
1...(1,6)b2 2.Qb3+ Ge1# (2.Qd3+? Gb1!)
1...B~ 2.Qc2+! Ge1# (2.Qd3+? Ge1+! 3.f3)
1...Bxc6! 2.Qxc6+!! Ge1# (2.Qc2+? Ka6!)
1...Be4! 2.Qxd4+!! Ge1# (2.Qc2+? Gxf4!)
1...Be2! 2.Qe5+!! Ge1# (2.Qc2+? Ge1+! 3.Gexe1)
1...Bd1! 2.Qc1+!! Ge1# (2.Qc2+? Ge1+! 3.Gaxe1)

Set play makes key a bit better, but only a bit. In solution there is extraordinary play of white queen, first on pin line, then, after indirect antibattery unpinning, in the space. 4 corrections by black bishop, rich use of grasshopper effects.

Personal rating: B.

1.LEg1? (paralyzing PAe1) th. 2.PAd5 cxd5#, 1...PAe4! (2.PAd5? cxd5+ 3.fxe4)
1.LEe2!? (paralyzing both PAe1 and PAe8), 1...PAxh6(LEh8)!! 2.LEh7-g7#
Next tries and solution contain both positive motives - paralysing e1 and destroying black defence by reflex mate 1...PAxh6, so they are all white tertiary attacks:
1.LEe3!!? VAb2!!! 2.LEh7-d3#
1.LEe4!!? LEb4!!! 2.VAa5#
1.LEe5!!? LEa6!!! 2.PAd4#
1.LEe6!!? LEb3!!! 2.PAa3#
1.LEe7!!! th. 2.PAd5 cxd5#

It was long fight with initial scheme by MR and CCF, it took about 2 years for me, but both co-authors were working on it long before.

Judge Ronald Turnbull is known for his appreciation of light positions and I well understand he didn't like technical moariders. But position is full of effects and it was extremely difficult to tame all cooks...

Personal rating: A.

1.Kd4! Rc5+ 2.Kd3 Rh5 3.Ke3 Qf2+ 4.Kd3 Qc2+ 5.Kd2 Rd5+ 6.Ke3+ Rd1 7.Kf3 Qg2+ 8.Kf4 Rh1 9.Ke5 Rf1 10.Kd4 Rh1 11.Kd5 and two main (symmetrical variations):
11...Rf1 12.Ke5 Rf6+ 13.Kd4 Qg7 (13...Rf1 14.Ke3 Qd2#) 14.Kd5 Rc6+ 15.Kd6 Qb7 16.Kc5 Qb4#
11...Rh3 12.Kd4 Rc3+ 13.Ke5 Qb2 (13...Rh3 14.Kf4 Qg5#) 14.Kd5 Rc6+ 15.Kc5 Qb7 16.Kd6 Qe7#
By-variations:
10...Qe2 11.Kd5 Qc4+ 12.Ke5 Rf6#
9...Rh3 10.Kf4 Qg5#
8...Qc2 9.Ke3 Qf2#

Lone white king does whatever-he-wishes with black army.

Personal rating: C.

1.Ra4 Se3 2.Re4 Sd3+ 3.Kd4 c3#

1.Ke6 Se4 2.Re5 Sd4+ 3.Kd5 c4#

Colour echo of ideal no-capture specifical mate.

Personal rating: C.