[Retros] Cornice Chess fun

[Éric Angelini]

Hello Marken,
Mario Richter tells me CC is a rediscovery
of the Edge-mover fairy condition:

https://bit.ly/3mEX9vf

He is currently computer-checking a few
minimal lengths — I will study your claims 
later today. Many thanks for yr post!
Best,
É.


> Le 30 oct. 2020 à 06:46, Marken Foo <markenfooyw at gmail.com> a écrit :
> 
> 
> Hello again,
> 
> 3) BxN in 11.0: 1.a4 ~ 2.Ra3 ~ 3.Rh3 ~ 4.Rxh7 Rxh7 5.h4 Rh8 6.h5 ~ 7.h6 ~ 8.h7 ~ 9.Rh6 gxh6 10.hxg8S ~ 11.S*h6 Bxh6
> 6) Stalemate in 7.5: 1.a4 h5 2.a5 h4 3.a6 Rh5 4.Ra4 Sh6 5.Rxh4 Ra5 6.Rxh6 Rh5 7.Rxh5 bxa6 8.Ra5=
> Earliest draw is technically 3-fold repetition (draw when white writes their 5th move - not black's 4th) or 5-fold repetition.
> 7) Mate by a pawn (if promotion counts) in 11.0: 1.h4 a5 2.h5 Ra6 3.h6 Rxh6 4. ~ Rxh1 5. ~ Rxg1 6. ~ Rxf1+ 7. Kxf1 h5 8. ~ h4 9. ~ h3 10. ~h2 11. ~ h1Q#
> 8) Mate by a king in 13.0: 1.a4 a5 2.Ra3 Ra7 3.Rh3 Ra6 4.Rxh7 Rh6 5.Rxh8 Rxh2 6.Rxg8 Rxh1 7.Rxf8+ Kxf8 8.Sa3 Rxg1 9.Sb1 Rxf1+ 10.Kxf1 Kg8 11.Kg1 Kh7 12.Kh2 Qh8 13.Qg1 Kg8#
> 
> Marken
> 
> 
>> On Fri, 30 Oct 2020 at 03:21, Éric Angelini <eric.angelini at skynet.be> wrote:
>> 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.
>>>>>> 
>>>>>> 
>>>>>> _______________________________________________
>>>>>> Retros mailing list
>>>>>> Retros at janko.at
>>>>>> https://pairlist1.pair.net/mailman/listinfo/retros
>>>>> _______________________________________________
>>>>> Retros mailing list
>>>>> Retros at janko.at
>>>>> https://pairlist1.pair.net/mailman/listinfo/retros
>>>> _______________________________________________
>>>> Retros mailing list
>>>> Retros at janko.at
>>>> https://pairlist1.pair.net/mailman/listinfo/retros
>>> _______________________________________________
>>> Retros mailing list
>>> Retros at janko.at
>>> https://pairlist1.pair.net/mailman/listinfo/retros
>> _______________________________________________
>> Retros mailing list
>> Retros at janko.at
>> https://pairlist1.pair.net/mailman/listinfo/retros
> _______________________________________________
> Retros mailing list
> Retros at janko.at
> https://pairlist1.pair.net/mailman/listinfo/retros
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://pairlist1.pair.net/pipermail/retros/attachments/20201030/289f717b/attachment-0001.html>