Petko A. Petkov (Bulgaria)
Original Problems, Julia’s Fairies – 2013 (III): September- December
Please send your original fairy problems to: email@example.com
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)
a) 1.b2-b1=wB!! Bb1xd3 2.Rc4-c1=wR!! This move is possible because the white Rook is paralyzed by Black and the black King is not under check! 2… Bd3-b5=bB #!! (impossible are moves 3.Bc3=wB or 3.Bc4=wB??) Here we have creation of a special Disparate-battery wBd3 / wRc1
b) 1.b2-b1=wR!! Rb1xb3 2.Bb4-a3=wB!! This move is possible because the white Bishop is paralyzed by Black and the black King is not under check! 2…Rb3-b6=bB #!! (imposssible are moves 3.Rcb4=wR?? or 3.Rbb4=wR??) Here we have creation of a special Disparate-battery wRb3 / wBa3
(С+ by Popeye v4.63)
Creation of a special Disparate batteries: in the first solution the both black Bishops (Bb4&Bb5) are paralyzed because of the Disparate half-move paralyzing effect; in the second solution the both black Rooks (Rc4&Rb6) are also paralyzed analogically. The important moment of the main theme is another paradoxical motive – blocks of the squares around the black King by the white pieces which change their color to black! Model mates.
The Black pieces symbolize the roof of the supermarket that was collapsed. (Author)