[Retros] Messigny 2004 : Retro Composing Tourney; announcement

[CAILLAUDM at aol.com]

Hello,

For the first time the retro composing tourney in Messigny is open to 
internet participation.

For the occasion, Laurent Riguet has created an address where problems should 
arrive before Sunday evening (8 pm in Messigny) :
messigny2004 at yahoo.fr

Here is the theme :
ProofGame :
A promotion occurs on square A. Another promotion to piece of same kind and 
same colour occurs on square B different from A. Then piece promoted on B 
occupies A.
No constraint on order of promotions.
Fairy ProofGames allowed.

Example :
Andreï Frolkin, 3rd HM, feenschach 1997-98
1R4Rq/p1ppppbk/7n/8/4r1n1/3B1P1r/PP1PNPP1/RNB1KQRb
SPG 20.0 C+
1.h4 Nc6 2.h5 Ne5 3.h6 Ng4 4.hxg7 h5 5.c4 h4 6.c5 h3 7.c6 h2 8.cxb7 Rh3 
9.b8=R N8h6 10.g8=R Bb7 11.Rg6 Bf3 12.exf3 Bg7 13.Bd3 Kf8 14.Qe2 Kg8 15.Qf1 Kh7 
16.Ne2 Qh8 17.Rg8 Rb8 18.Rg1 Rb4 19.Rb6+ Re4 20.Rbb8 h1=B
Here theme is doubled due to exchange of place but that is of course not 
necessary.

Note :
Theme is clearly related to Anti-Pronkin (though piece promoted on A don't 
need to be captured).
I found about 10 existing examples in the bases; no fairy profgames among 
them and in most of them, the theme is secondary and not the main part of the 
problem (first example is a double Pronkin by Gerd Wilts, Shortest Proof Games 
1991) except in Andreï's example and the later 12045, Die Schwalbe 2003 by Reto 
Aschwanden.

Best wishes,
  Michel Caillaud
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