[Retros] Five White pieces, same square-colour

Eric Angelini Eric.Angelini at kntv.be
Mon Dec 28 11:33:20 EST 2009

Solution now here (bottom of page):
Best,
É.

-----Message d'origine-----
De : Eric Angelini
Envoyé : dimanche 27 décembre 2009 19:10
À : The Retrograde Analysis Mailing List
Objet : Five White pieces, same square-colour

Hello RetroFans,

+---+---+---+---+---+---+---+---+

| r | n | | q | k | | n | r |

+---+---+---+---+---+---+---+---+

| p | p | b | | | b | p | p |

+---+---+---+---+---+---+---+---+

| | | p | p | p | p | | |

+---+---+---+---+---+---+---+---+

| | | | | | | | |

+---+---+---+---+---+---+---+---+

| | | | | | | | |

+---+---+---+---+---+---+---+---+

| | | | | | | | |

+---+---+---+---+---+---+---+---+

| P | P | P | P | P | P | P | P |

+---+---+---+---+---+---+---+---+

| R | N | B | Q | K | B | N | R |

+---+---+---+---+---+---+---+---+
16+16

Remove 5 white pieces that are placed
on the same colour-square and reach
the new position in 11.0 moves.

(example: remove Ra1, b2, Bc1, d2
and f2, which are on dark squares)

| | | | | | | | |

+---+---+---+---+---+---+---+---+

| P | . | P | . | P | . | P | P |

+---+---+---+---+---+---+---+---+

| . | N | . | Q | K | B | N | R |

+---+---+---+---+---+---+---+---+

... and try to reach the hereunder new
position in 11.0 moves :

+---+---+---+---+---+---+---+---+

| r | n | | q | k | | n | r |

+---+---+---+---+---+---+---+---+

| p | p | b | | | b | p | p |

+---+---+---+---+---+---+---+---+

| | | p | p | p | p | | |

+---+---+---+---+---+---+---+---+

| | | | | | | | |

+---+---+---+---+---+---+---+---+

| | | | | | | | |

+---+---+---+---+---+---+---+---+

| | | | | | | | |

+---+---+---+---+---+---+---+---+

| P | . | P | . | P | . | P | P |

+---+---+---+---+---+---+---+---+

| . | N | . | Q | K | B | N | R |

+---+---+---+---+---+---+---+---+
11+16

Which are the 5 white pieces you'll
have to drop out of the chessboard
in order to complete the task?

Best,
É.