[Retros] Cornice Chess fun

[Éric Angelini]



Hi Marken,
1) is possible in 7.0
2) is possible in 9.5
3) is possible in 11.0
4) is the same as mine
... and now for:
5) earliest MATE
6) earliest DRAW
7) earliest MATE by a PAWN (I have 13.5 but 
   it might be bettered)
8) earliest MATE by a KING (I have 13.5)

à+
É.
Catapulté de mon aPhone


>> Le 29 oct. 2020 à 18:36, Marken Foo <markenfooyw at gmail.com> a écrit :
> 
> Hi again Éric,
> 
> Not particularly sure on some parts, but I got:
> 1) 0-0 in 9.0: e.g. 1.h4 ~ 2.h5 ~ 3.h6 gxh6 4.Rxh6 Sxh6 5.a4 ~ 6. Ra3 ~ 7.Rh3~ 8.Rxh6 Bxh6 9. ~ 0-0. 
> 2) NxB in 10.0 e.g. 1.h4 ~ 2.Rh3 ~ 3.Ra3 ~ 4.Rxa7 Rxa7 5.a4 Ra8 6.a5 ~ 7.a6 ~ 8.a7 Sa6 9. ~ Rb8 10.axb8B Sxb8
> 3) BxN in 12.0 e.g. 1.h4 a5 2.Rh3 Ra6 3.Ra3 Rh6 4.Rxa5 Rxh4 5.Ra8 Rh1 6.a4 h5 7.a5 h4 8.a6 h3 9.a7 h2 10.axb8S ~ 11.R8a6 bxa6 12.Sxa6 Bxa6
> 4) BxB in 13.5 e.g. Same first 9.0 as 3), then 10.Rxb8 Rxg1 11.a8B h1B 12.Ra6 Rh3 13.gxh3 bxa6 14.Bxh1
> 
> Sincerely,
> Marken
> 
>> On Thu, 29 Oct 2020 at 20:53, Éric Angelini <eric.angelini at skynet.be> wrote:
>> Hello Retros’ friends,
>> more puzzles from lockdowned Brussels.
>> « Cornice Chess » (CC) allows only movements 
>> that end on ranks 1 and 8 or columns a and h
>> (the opening 1. Nc3 is forbidden but not the
>> Sodium Attack 1. Na3)
>> 
>> What is the length of the shortest CC game ending in:
>> 1) 0-0
>> 2) NxB
>> 3) BxN
>> 4) BxB
>> Best,
>> É.
>> 
>> 
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