[Retros] N1-N-A-legal (17 pieces)

[Thierry LE GLEUHER]

Dear retro friends
There is an improvement of my last problem.
Sincerely
Thierry

N1-N-A-legal (17 pieces)Thierry LE GLEUHER 8/2p4p/2p5/1Pp5/bpp5/qkPP4/p1pPP3/K7

+---+---+---+---+---+---+---+---+|   | . |   | . |   | . |   | . |+---+---+---+---+---+---+---+---+| . |   |*P |   | . |   | . |*P |+---+---+---+---+---+---+---+---+|   | . |*P | . |   | . |   | . |+---+---+---+---+---+---+---+---+| . | P |*P |   | . |   | . |   |+---+---+---+---+---+---+---+---+|*B |*P |*P | . |   | . |   | . |+---+---+---+---+---+---+---+---+|*Q |*K | P | P | . |   | . |   |+---+---+---+---+---+---+---+---+|*P | . |*P | P | P | . |   | . |+---+---+---+---+---+---+---+---+| K |   | . |   | . |   | . |   |+---+---+---+---+---+---+---+---+

(6+11)

Add 1 piece

 

bPs captured 10 times (all the
white missing pieces). So wPs captured 4 times and there is one black unit can
be uncaptured freely. White retro move b2xXc3 or c4xXb5 is not possible

 

The position is legal :

Retro : 1. … d7xRc6 2.Rh6-c6
d5xNc4 3.Nb2-c4 d6xQc5 4.Rh1-h6 e7xRd6 5.Rb1-h1 e6xNd5 6.Rh1xNb1 f7xBe6
7.Nc4-b2 Qc1-a3 8.Rh6-h1 Ka3-b3 … or 1. … d7xRc6 2.Rg6-c6 d5xNc4 3.Rg8-g7
d6xQc5 4.g6-g7=R e7xRd6 5.h6xXg7 … Rh1xNb1 …

 

The cage can be opened only by
uncapturing a black unit on b1.

If we add 1 piece (black), the
precedent retro play is not possible any more.

It’s necessary to add the black piece
on b1. Not a new Bishop on white square !

solution : + bNb1

retro : 1. … d7xRc6 2.Rh6-c6 Qc1-a3
3.Rh5-h6 Ka3-b3 …






 		 	   		  
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