[Retros] Cornice Chess fun

[Éric Angelini]

Yep!

à+
É.
Catapulté de mon aPhone


> Le 29 oct. 2020 à 19:55, Jack Murtagh <murtagh.jack at gmail.com> a écrit :
> 
> 
> Hi Éric and Marken,
> 
> Here's mate in 7.5:
> 
> 1.h4 ~ 2.h5 ~ 3.h6 gxh6 4.Rxh6 ~ 5.Rxh7 Bh6 6.Rxh6 ~ 7.Rxh8 ~ 8.Rxg8#
> 
>> On Thu, Oct 29, 2020 at 2:00 PM Éric Angelini <eric.angelini at skynet.be> wrote:
>> 
>> 
>> 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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