Ladislav Packa


Original Problems, Julia’s Fairies – 2014 (III): September – December

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No.622 by Ladislav Packa – Short, but interesting idea showing Disparate condition in PG problem! (JV)


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”.). A pawn promoting is a pawn move. (Popeye’s interpretation)

No.622 Ladislav Packa

original – 12.10.2014

Solution: (click to show/hide)

white Bf1c1 Ke1 Qd1 Ph2g2f2e2d2c2b2a2 Sg1b1 Rh1a1 black Bf8c8 Ke8 Qd8 Ph7g7f7e7d7c7b7a7 Sg8b8 Rh8a8

PG5                                   (16+16)
Disparate (Py)

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October 12, 2014 22:58

Interesting. But the fairy condition merely eliminates cooks!

Dmitri Turevski
Dmitri Turevski
October 13, 2014 07:02
Reply to  seetharaman

They all seem to be thematic tries here.

Kjell Widlert
Kjell Widlert
October 13, 2014 15:55

White and Black have to play exactly the same moves. Each side has 5 possible sequences (the S move can occur at any half-move, the others are fixed), but the condition dictates that only one sequence works for each side – and it’s not the same sequence. The necessary distance between White and Black is kept by having Black playing the S move first, and White playing it last.

The idea clearly justifies the condition.