[Retros] Cornice Chess fun

[Marken Foo]

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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