[Retros] New problem in length records

[Alain BROBECKER]

Dear Retro friends,

Mario Richter cooks the following problem:


> A10b) Werner Keym

> Eigenartige Schachprobleme, 2010

> 4BR2/3pRKpk/4p1pp/8/8/8/8/8

> 4+6: First move of WRf8?

> (Last 3 single moves?)


[Mario]

>But the following alternative solution does also work:

>

>-1.Rg8-f8 Kh8xNh7! -2.Rf8xNg8+ Nf6xNg8 -3.Ng5-h7 Nd5-f6

>-4.Nf6xNg8 Nb4-d5 -5.Ne4-f6 Kh7-h8 -6.Nf3-g5 Nf6-g8

>-7.Rg8-f8 Kh8-h7 -8.h7xNg8=R Nd5-f6


[...]

>Here's another resolution line which shows that

>even the first move of wRf8 is not uniquely determined:

>

>-1.Rg8-f8 Kh8xNh7 -2.Rf8xNg8 Nf6xNg8 -3.Ng5-h7 Nd5-f6 -4.Nf6xNg8 Nb4-d5

>-5.Ne4-f6 Kh7-h8 -6.Nf3-g5 Nf6-g8 -7.Rg8-f8 Nd5-f6 -8.Kf8-f7 Nb6-d5

>-9.Bf7-e8 Na4-b6 -10.Re8-e7 Nc3-a4 -11.Ra8-e8 Ne2-c3 -12.Ra1-a8 Ng3-e2

>-13.Rh1-a1 Nh5-g3 -14.Ke7-f8 Na6-b4 -15.Ra8-g8 Nb8-a6 -16.Ra1-a8 Kh8-h7

>-17.Kd6-e7 Kh7-h8 -18.Kc5-d6 e7-e6 -19.Bc4-f7 Kg8-h7 -20.Bf1-c4 f7xPg6


So the booklet has been reverted to its own self again.
http://abrobecker.free.fr/chess/lengths.pdf

Best regards, Alain