Andrej V. Selivanov

1.Qa8? th. 2.g2~#
1...Bxg1 2.Qf3 th. 3.Qh3#
1...Bg3!

1.Qg8! zz
1...Bb8 2.Ba7+ Kh2 3.Bxb8#
1...Bc7 2.Bb6+ Kh2 3.Bxc7#
1...Bd6 2.Bc5+ Kh2 3.Bxd6#
1...Be5+ 2.Bd4+ Kh2 3.Bxe5#
1...Bf4 2.Be3+ Kh2 3.Bxf4#
1...Bg3 2.Bf2+ Kxg2, Kh2 3.Qxg3#
1...Bxg1 2.Qg4 th. 3.Qh3#

JL: "Duel of bB and wB in 6 variations, the 7th variation is changed from the try, that is defended by unusual defence motive of pawn blocking. Incredible content for the miniature."

a) 1.e1B a8S 2.Bb4 Sb6#

b) 1.e1R a8Q 2.Ra1 Qg2#

JL: "3 study authors (A. Selivanov composes them too!) joined their powers and produced miniature helpmate with well known AUW. It is interesting to find out that this problem satisfies theme of the 10th TT CCM."

1.Qc8! th. 2.Rb5+ Kd6 3.Rb6+ Bxb6#
1...Bxg6 2.R5xd3+ Ke7 3.Re2+ Be3#
1...Sc5 2.Rxf5+ Kd6 3.Qxc5+ Bxc5#
1...Kf7 2.Rxd7+ Kxg6 3.Qa6+ Bb6#
1...Sd4 2.Qe8+ Kf6 3.Bxd4+ Bxd4#

Comment from the book: "Big cross of white Rook. There is a flight-giving key."

1...Bxg7 2.Rh3+ Kf5 3.Qf4+ Kxf4 4.Rf6+ Bxf6#
1...Qa6 2.Qe1+ Qe2 3.Rg3+ Kf4 4.Rg4+ Qxg4#

1.Qc3? th. 2.Rg3+ Kf4 3.Qf3+ Qxf3 4.Rg4+ Qxg4#
1...Sd5!

1.Qg2! th. 2.Rg3+ Kf4 3.Qf3+ Qxf3 4.Rg4+ Qxg4#
1...Bxg7 2.Rf5+ Kxf5 3.Qh3+ Kf4 4.Rf6+ Bxf6#
1...Qa6 2.Rf4+ Kxf4 3.Sd3+ Qxd3 4.Qg3+ Qxg3#
1...Sd5 2.Rh3+ Kf4 3.Sxd5+ Qxd5 4.Qg5+ Qxg5#

Comment from the book: "In the set play there are 2 variations with a play of a rook-bishop battery. In the solution there are 4 variations with a rook-queen battery, w of the variations are changed. The variations are emphasized by a try."

1.Ba5! zz
1...e1Q 2.Sg4+ Kc4 3.Qd4+ Kxd4 4.Se6+ Kc4 5.Sxe3+ Qxe3#
1...e1R 2.Sf7+ Kc4 3.Qe6+ Kd4 4.Rb4+ Kc5 5.Qc4+ Bxc4#
1...e1B 2.Bc3+ Bxc3 3.Sf3+ Kc4 4.Qd4+ Bxd4 5.Sd2+ exd2#
1...e1S 2.Sd3+ Kc4 3.Rb4+ Kd5 4.Rd4+ Kc6 5.Qf3+ Sxf3#

Comment from the book: "After a unexpected key there is a black AUW and the promoted black pieces mate afterwards, twice by means of a created batteries. After 4 Black promotions there is also fourfold play of a white knight-queen battery."

1.Kd3! th. 2.Qe7+ Kc6 3.Sd8+ Kd5 4.c4+ bxc3 e.p., bxc4+ 5.Ke3+ Rd2 6.Qxg5+ Bxg5#
1...Rb1 2.Ke2+ Rxd1 3.Qc6+ Kxc6 4.c8Q+ Kd5 5.Sb6+ Ke4 6.Qxg4+ Bxg4#
1...Rb3+ 2.Ke4+ Rd3 3.Qc6+ Kxc6 4.c8R+ Kd7 5.Rc7+ Ke6 6.Rxg6+ Bxg6#

Comment from the book: "In 3 variations including the threat there is a play of a white royal battery and chameleon echo mates. The content is supplemented by different promotions of a wP."

1.Kd5! zz
1...h6 2.Ke4 hxg5 3.Kf3 gxh4 4.Kg2 h3+ 5.Kh1 h2 6.Sc4 a5 7.Qf8+ Kxd7 8.Qc8+ Ke7 9.Sd5+ Bxd5#
1...hxg6 2.Kc4 gxh5 3.Kb3 g6 4.Sc4 a5 5.Ka2 a4 6.Ka1 a3 7.b4 a2 8.Qf8+ Kxd7 9.Se5+ Bxe5#

Comment from the book: "Chameleon echo model mates in different corners of a board by unpinned black Bishops. White King makes nine moves during the solution."