Julia's Fairies

No.429 (PAP)

Petko A. Petkov (Bulgaria)


Original Problems, Julia’s Fairies – 2013 (III): September- December

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No.429 by Petko A. Petkov – A paradoxical combination between Disparate and Anti-Andernach! Thank you, Petko, for the dedication! (JV) 


Anti-Andernach: A piece (excluding King) changes its color after any non-capturing move. After capture, the piece retains its color. Rooks on a1, h1, a8 and h8 can be used for castling, provided the usual other rules for that move are satisfied. After castling, Rooks do not change color, If White makes a non-capturing move with neutral or halfneutral piece, that piece becomes black and vice versa.

Disparate: If one side makes a move with a piece of type “x” (black, white, neutral, half-neutral, etc., King included), the other side cannot answer immediately by moving a piece of the same type “x”. (For example: white Qc1, black Ka8,Qa7 – mate in 1 move. After 1.Qc8#, Black is mated because 1…Qb8? is illegal. The mate is possible also with the neutral nQc1 – after 1.nQc8#. Black cannot move the same neutral Queen.) Every Pawn’s promotion is a Pawn’s move, therefore after such promotion (into any possible piece) the other side cannot answer immediately with its Pawn. We can say that after the move of the figure of type “x” any enemy figure of type “x” falls under Half-moving paralysis. This paralysis disappears immediately on the next half-move, if the opponent plays with another piece of type “y”.
This is the main version of Disparate (the programmer is Stephen Emmerson), that is presented only in Popeye (starting 4,53 version), and answers to the definition of the inventor Romeo Bedoni (2004) and to the requirements about this condition of the editors of “Phenix”. Using Popeye‘s version of Disparate in 2010 was organized a big international tournament Bedoni – 80 Jubilee, with results published in the magazine “Phenix” – No.191-192/2010. In the same number was also published a big article by Petko A.Petkov about Disparate, dedicated to its inventor Romeo Bedoni.  Important note: Disparate condition is not included in Popeye‘s manual, but it is implemented there and can be used as “Disparate“.
Another version of Disparate you can find in WinChloe, but it is based on the different rules.  

No.429 Petko A. Petkov
original – 23.11.2013
Dedicated to the memory of the victims of Riga tragedy!
h#2              b) Bc7?d7           ( 2+8 )
Solutions: (click to show/hide)

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November 24, 2013 10:27

Nice paradoxical battery mates. The Disparate fairy condition is very interesting. Petkov has brought out the essence of the condition with imagination. Thanks Petkov.

Janos Mikitovics
Janos Mikitovics
November 24, 2013 12:01

Dear Petko!
Congratulations on your wonderful problem which have a great impact on me!

Maybe can do something with this schema?!
Black Kd3 Pa2 Pd2 Pf2 Pg2
h#3 b) Ka1 ( 0 + 5 )
c) Ke1 & d) Kg1 h#4

a) 1.a2-a1=R=w Ra1-a4=b 2.g2-g1=Q=w Qg1*f2 3.Ra4-d4=w Qf2*d2 #
b) 1.g2-g1=B=w Bg1-h2=b 2.f2-f1=S=w Sf1*d2 3.Bh2-e5=w Sd2-b1=b #

c) 1.g2-g1=B=w Bg1-e3=b 2.d2-d1=S=w Sd1*e3 3.b2-b1=S=w Se3-c2=b 4.a2-a1=Q=w Sb1-d2=b #
d) 1.b2-b1=S=w Sb1*d2 2.Kg1-h1 Sd2-f1=b 3.a2-a1=Q=w Qa1*f1 + 4.g2-g1=B=w Bg1-h2=b #


Kjell Widlert
Kjell Widlert
November 25, 2013 22:27
Reply to  Julia

The idea is reminiscent of Petko’s many (wonderful) examples of neutrals in Disparate: Black (or White) can put himself into an apparent self-check which is in fact only a deferred self-check; on the next move, it turns into a real check. The difference is that with neutrals, the deferred self-check comes from a piece that is black and white simultaneously; in Anti-Andernach, it comes from a black piece that turns White!

Geoff Foster
Geoff Foster
November 25, 2013 00:37

Here is a 2-solution one.

Black Kd3 Pb2 Pc2 Pd2 Pg2
h#3 2 solutions

1.d2-d1=S=w Sd1-f2=b 2.g2-g1=Q=w Qg1*f2 3.b2-b1=Q=w Qb1*c2 #
1.g2-g1=R=w Rg1-g4=b 2.c2-c1=Q=w Qc1*b2 3.Rg4-d4=w Qb2*d2 #

C+ Popeye 4.63 and WinChloe 3.24

Janos Mikitovics
Janos Mikitovics
November 25, 2013 09:07
Reply to  Geoff Foster

The mattes are more harmonious, but the AUW is missing…
Here is a new version with a royal S:
Black royal Sb1
Black Pe2 Pg2 Ph2
H#3 b) rSb1→e1 ( 0 + 4 )
a) 1.h2-h1=B=w Bh1*g2 2.rSb1-d2 Bg2-f3=b 3.e2-e1=S=w Se1*f3 #
b) 1.g2-g1=B=w Bg1*h2 2.rSe1-g2 Bh2-g3=b 3.e2-e1=Q=w Qe1*g3 #
C+ Popeye v4.63

Geoff Foster
Geoff Foster
November 25, 2013 23:34

Very nice, but with Disparate it is almost cheating to use a knight to mate a royal knight!

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