[Retros] FW: Problem a friend of mine and I created years ago

[Yoav Ben-Zvi]

Solution: 1.Pa6xb7! 

WBg4 was promoted on b8 or d8. Promotion by pawn capture from c7 would require 6 captures by White Pawns but only 5 Black pieces (excluding BBf8) are available for capture. Therefore the promotion move was WPd7-d8 and the Black King moved before so it would not be standing in check which implies that Castling by Black is invalid. The analysis is elementary by expert standards but it is remarkable that this would be discovered completely independently and the composers should be encouraged to persist perhaps after reading some introductory material such as  http://www.janko.at/Retros/PedagogicalCollection.htm 

 

Yoav

 

From: Retros [mailto:retros-bounces at janko.at] On Behalf Of Paulo Peccin
Sent: Friday, September 05, 2014 4:50 AM
To: retros at janko.at
Subject: [Retros] Problem a friend of mine and I created years ago

 

Hello,

 

I am new to this list.

 

I would like to contribute a chess problem invented by me, Paulo Peccin, and my friend Klaus Wuestefeld.

We created this problem many years ago, when I we did not even know there was a category of problems called Retrograde.

 

It's a "Mate in 2" problem. White to play.

The board position is in the attached image file.

 

I would like you guys to comment on this, and please let me know if you find the solution (with proof)!

 

Regards,

Paulo

 

 

 

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