Fairy twomovers with multiple threats 1

1.Qf3? th. 2.Rg1#, Re1#
1...Bd2!

1.Ba3! th. 2.b4#, b3#
1...Qh5+ 2.Rg1#
1...Qd5+ 2.Re1#

As you might expect, Madrasi is an Indian invention. And this problem is one of first con Madrasi problems published, perhaps by its inventor.

In the try White paralyses bQ and thus has double threat by two rooks. Easy refutation by bishop is enough.

In the solution there is less thematical double threat by pawn, but the key provokes two checks. They are followed by rook cross-checks with battery paralysis of the checking bQ, repeating the try mates.

A soft prelude to more complex works.

1.Qc3? th. 2.Rxf3#, Bxf3#
1...Bc7!

1.Qf4? th. 2.Qxf3#
1...Qc4!

1.Qg4? th. 2.Qxf3#
1...Qb4!

1.Qe4! th. 2.Qxf3#
1...Qb4 2.Bxf3#
1...Qc4 2.Rxf3#

Here only the first try carries double threat, but fairly thematical. 1.Qc3 closes two paralysis lines, thus guards both e2 and f2 - takes two flights and thus allows both capture mates on f3.

Other two tries close alternatively one of two capture lines for white linemovers thus allowing refutations by safe closing of one of two thematic paralysis lines in question.

The key has again the same threat 2.Qxf3# (undisturbed by any of king flight defences), but now the bQ closing one of lines allows mates from the thematical doubel threat of the first try.

Good scenario of mostly static lines.

1.h8Q? th. 2.Qd8#, Qg8#, Qf6#, Qg7#
1...e1Q!

1.h8R? th. 2.Rg8#
1...e1R!

1.h8B? th. 2.Bf6#
1...e1B!

1.h8S? zz
1...e1S!

1.Ra6! th. 2.Rg6#
1...Sf5 2.Rxf5#
1...e1R 2.Sf3#

Here the double threat in the queen promotion try looks like incidental, but it is more a logical consequence of the theme: four white promotions are refuted by matching black promotions. The number of threats in tries is as follows: 4, 1, 1, 0. The solution has to be there, but it does not add anything special.

1.Sb4! th. 2.Se6#, Rd8#
1...c1Q 2.Be3#
1...c1B 2.Qc5#
1...e1R 2.Bc3#
1...e1B 2.Re4#
1...h1Q 2.Rh4#
1...h1R 2.Qd5#

The double threat is used here for the precising the defences. All six defences defend both threats - bishop promotions prepare flight on e3 by paralysis of Bd2, queen promotions prepare flights on c4/e4 by paralysis of Qc6 and rook promotions have different motivation (flight on e5, paralysis/guard on e-line). Anyway, the whole scenario is well written and also technically finished (without white pawns).

1.Qe5? th. 2.Qxe3#, Qxc3#
1...Rxe5 2.Se4#
1...Bxe5 2.d4#
1...Sb3!

1.Qg7? th. 2.Qxa7#, Qxc3#
1...Bxg7 2.d4#
1...Rxg7 2.Sb7#
1...b1Q!

1.Qe7! th. 2.Qxa7#, Qxe3#
1...Rexe7 2.Se4#
1...Raxe7 2.Sb7#

There are three paralysis lines active in the diagram position: Ra7-Rh7, Re3-Re8 and Bc3-Bh8. White queens moves to their three intersection e5, g7 and e7 in two tries and solution, always threatening capture of two black thematical pieces. Reversed captures by pairs of black pieces defend all threats, but reactivate paralyses. As a consequence white can mate on the passed squares e4, d4 and b7. con Madrasi mechanism for less usual change Z-32-63.

1.c8Q! th. 2.Qe6#, Qa6#
1...g5 2.Sd6#
1...g6 2.Se3#

The double threat is more technical here, forcing activation of the black queen. Two moves of the black pawn then close one of the potential paralysis lines h7-d3/h5-c5 each and White exploits that by careful selection of the mating move by knight. Mate Sd6 is possible when 2...Sb5 is impossible thanks to Rc5 activation and similarly Se3 works when Black is prevented from playing 2...Sc2.

a)
1.Sfg3! th. 2.Bxc8#, Sc3#
1...Rxg3 a 2.Bxc8# A
1...Bxg3 b 2.Sc3# B

b)
1.Qg3! th. 2.Sc3#, Sd6#
1...Rxg3 a 2.Sc3# B
1...Bxg3 b 2.Sd6# C

c)
1.Seg3! th. 2.Sd6#, Bxc8#
1...Rxg3 a 2.Sd6# C
1...Bxg3 b 2.Bxc8# A

In this problem the Madrasi condition is supplemented by two other "conditions" - orthodox rules and Kamikaze chess. The key depends on the condition and is always made by one of the pieces giving check in the thematical mates: one of pair of knights or queen. As a result we get cycle of threats spread over solutions of three hybrid twins.

Further it is also important that threats are separated by two capturing defences in a cyclic fashion, resulting in the unusual Rice cycle. Madrasi phase is especially important in the overall mechanism with choice of mating move made thanks to flights c4 and b6.

1.e7? th. 2.d8Q#, d8B#
1...Se6!

1.Bg1? th. 2.axb6#
1...Qf2 a 2.d8Q# A
1...Be3 b 2.d8B# B
1...Se3!

1.Qe5! th. 2.axb6#
1...Qf2 a 2.d8B# B
1...Be3 b 2.d8Q# A

The first try closes diagonal h4-d8, threatening two promotion mates, however direct guard by knight refutes.

The second try and solution share the new threat made possible by additional guard on b6. Two black defences on the other diagonal g1-b6 then put into work a reciprocal change with former double threat mates as thematical mates. Construction may be sub-optimal, but the idea is interesting from changes point of view and the mechanism is fairy enough.

1.e8Q? A th. 2.Qe5#, Qxc6#, Rb8#, Sxb5#
1...Qxe2! a

1.e8R? B th. 2.Re5#, Rb8#, Sxb5#
1...Rxe2! b

1.e8B? C th. 2.Bxc6#
1...Bxg6! c

1.e8S? D th. 2.Sd6#
1...Sxc7! d

1.e8G? E th. 2.Gxb5#
1...Ge1! e

1.Gd8! th. 2.e8~#
1...Qxe2 a 2.e8Q# A
1...Rxe2 b 2.e8R# B
1...Bxg6 c 2.e8B# C
1...Sxc7 d 2.e8S# D
1...Ge1 e 2.e8G# E

A thrilling work featuring other (super-)AUW try idea. Five promotion tries (including grasshopper one) have variable number of threats (4, 3, 1, 1, 1 respectively). Then the solution has all five promotions as threats and five black refutations of tries separate the threats in a most paradoxical way. The mates follow just after the defences refuting them as the first moves of tries.