[Retros] On Fieberg's task : "everyone gives check".

[fieberg at gcr.com]

It seems that Nicolas Dupont is the first author who fulfilled my task #1
or are there other SPGs known composed earlier?
I wonder whether it will be possible to manage the task in less than 14.5
moves.

Regards,
CF

----- Forwarded by Christoph Fieberg/GCR-Germany/GRN on 16.10.02 09:36
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                      Nicolas DUPONT                                                                                                   
                      <dupont at agat.univ        To:       retros at janko.at                                                               
                      -lille1.fr>              cc:                                                                                     
                      Sent by:                 Subject:  [Retros] On Fieberg's task : "everyone gives check".                          
                      retros-admin at jank                                                                                                
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                      15.02.04 07:41                                                                                                   
                      Please respond to                                                                                                
                      retros                                                                                                           
                                                                                                                                       
                                                                                                                                       




Dear retro friends;

I've got the following exact pj (C+ in 4.5s with Euclide), where every
white men (except king and pawns) gives check.

1) d4 e6 2) Dd3 Re7 3) Fg5+ Rd6 4) Dg3+ Rd5 5) e3 b5 6) Fc4+ bxc4 7) Cf3 c3
8) 0-0 cxb2 9) Cc3+ Rc4 10) Cd5 b1D 11) c3 Dxa2 12) Ce5+ Rb3 13) f3 Dc2
14) Ta3+ Rb2 15) Tb1+

It is perhaps possible to go quickly, but I haven't see the way.

The next step is, in my opinion, to find a "short" exact pj where every
white pawn gives check (in its original form or after having been
promoted).

Sincerely;

Nicolas Dupont.


----- Forwarded by Christoph Fieberg/GCR-Germany/GRN on 16.10.02 09:36
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                      Christoph Fieberg                                                                                                
                                               To:       retros at janko.at                                                               
                      07.10.02 23:20           cc:                                                                                     
                                               Subject:  3 tasks                                                                       
                                                                                                                                       



1) SPG where each white piece - apart from pawns - gives a check.

2) SPG where each white piece - including pawns - gives a check. Pawns may
do this as promoted piece.

3) SPG where each white piece - including pawns - gives a check. Pawns are
not allowed to give a check as promoted piece.


Very nice would be:
- each piece gives a check only once
- the last move is a double checkmate
- the number of moves is as short as possible.


Regards,
CF