[Retros] A single red unit

[Éric Angelini]

Agree, thanks Marken!

à+
É.
Catapulté de mon aPhone


> Le 25 oct. 2020 à 16:30, Marken Foo <markenfooyw at gmail.com> a écrit :
> 
> 
> Hi Éric,
> 
> A difficulty of 1 or 2 sounds right, since it's just playing with 4 out of 32 units...
> 
> Sincerely,
> Marken
> 
>> On Sun, 25 Oct 2020, 23:22 Éric Angelini, <eric.angelini at skynet.be> wrote:
>> Yep! 
>> BTW, on a scale 0 to 10 (easy/ not easy)
>> how would you judge this?
>> (me: 2/10)
>> Best,
>> É.
>> Catapulté de mon aPhone
>> 
>> 
>>>> Le 25 oct. 2020 à 16:17, Marken Foo <markenfooyw at gmail.com> a écrit :
>>>> 
>>> 
>>> Hello all,
>>> 
>>> It seems like a promoted unit has to be interpreted as a "fresh" non-red unit, so I have 13.0 moves:
>>> 1. a4 a5 2. Ra3 Ra6 3. Rb3 Rc6 4. Rb5 Rc4 5. Rxa5 Rb4
>>> 6. Rb5 Rc4 7. a5 Rb4 8. a6 Rc4 9. a7 Rb4
>>> 10. a8=R Rc4 11. Ra1 Rb4 12. Rba5 Ra4 13. Ra8 Rxa8
>>> 
>>> Sincerely,
>>> Marken
>>> 
>>> 
>>>> On Sun, 25 Oct 2020 at 19:05, Éric Angelini <eric.angelini at skynet.be> wrote:
>>>> Hello Retro fans,
>>>> 
>>>> rnbqkbnr/1ppppppp/8/8/8/8/1PPPPPPP/RNBQKBNR
>>>> 
>>>> Say a « red » unit is a chess unit that moved more than once during the game.
>>>> 
>>>> What is the minimum number of moves needed to reach the above FEN diagram where only one of the 30 units is red?
>>>> 
>>>> Best,
>>>> É.
>>>> 
>>>> 
>>>> 
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