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Задача 324: Alberto Armeni - Fairy (Circe)

armeni(25.01.2014) Феерична задача с Ретро-анализ елементи от Alberto Armeni.





324

Try:  1…0-0-0? with for example 2.Kb3 Rd3+ 3.Ka2 Ra3#

Retro-analysis: the last black move was NOT a capture of a white piece, as due to Circe condition said piece would be reborn on its initial position, white square (white has only two pieces, both on black squares).

As a consequence, the previous white move was of the Ke1 or the Ra1, and after that, castling is illegal.

There are many apparent cooks in 3.5 moves, but they begin with an illegal castling, therefore there is only the following solution:

1…Ra7 2.Sxa7(Ra1) [now castling is legal] 0-0-0 3.Kb3 Rd3+ 4.Ka2 Ra3#


Circe: Captured units (not Ks) reappear on their game-array squares, of the same colour (pieces), on the file of capture (pawns), or on the capture file’s promotion square (fairy pieces). If the rebirth square is occupied the capture is normal. 

 

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