Fwd: Re: Fwd: Re: [Retros] Two little SPG-challenges

[Christoph Fieberg]

Hello Michel,
Euclide says "une solution" but did not finish and Natch does not show any 
result so far. Could it be that the solution is unique for the stipulation 
SPG in exactly 10.5 moves!?

Anyway - as the record hunt is opened here is another try for category 3 
(At-Home-LS-SPG) elevated to 11.5 moves:

Christoph Fieberg - SPG in 11.5 moves (9 + 10) - 22.11.04 - C-
rnb1kbn1/pppp4/8/8/8/8/1P1P3P/RNB1K1NR b KQq - 0 12

The clou is that bishops on c1 and c8 could not have moved.

Best regards,
Christoph



>Sorry Christoph, but your problem is cooked in 10.0 :

>4.axb7 cxb2 5.bxa8=N bxa1=N 6.Nb6 Nb3 7.Nxc8 Nxd2 8.Nxe7 Nxf1 9.Kxf1 Kxe7 

>10.Ke1 Ke8 (of course intention was 10...Nxb1 11.Nxb1)

>not difficult for me to spot the cook, as I already worked on the subject 

>: these switchback capturing are the "basic" cooks to avoid when 

>constructing such games.

>

>Best,

>  Michel

>Hello,

>

>today I composed also an At-Home-Lazy Spectators-SPG with Ceriani-Frolkin 

>and Pronkin in 10.5 moves. The position after 10.0 moves is C+ verified 

>after few minutes by Natch. On the final position Natch and Euclide are 

>still working (I assume they will need not more than a couple of hours) 

>but as for Michel's SPG here is another chance for human cookers to be faster.

>

>Christoph Fieberg - SPG in 10.5 moves - 21.11.04 - C-

>1n1qkbnr/p2p1ppp/8/8/8/8/2P1PPPP/1NBQK1NR b Kk - 0 11

>SPG 10.5 (11+11)

>

>Best regards,

>Christoph

>

>

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