[Retros] Add units: 16th update - improvement

[Joost de Heer]

On 06/08/2011 11:17 PM, Thierry LE GLEUHER wrote:

> Dear retro friends

> The 1NAi can be improved by decreasing the number of units.

>

> 1NAi (19 pieces)

> Thierry LE GLEUHER

> After Mu-Tsun-Tsai

> 2B5/PPRp4/1Rp5/kp6/p7/Q1P5/PPrPP2P/K7

> +---+---+---+---+---+---+---+---+

> | | . | B | . | | . | | . |

> +---+---+---+---+---+---+---+---+

> | P | P | R |*P | . | | . | |

> +---+---+---+---+---+---+---+---+

> | | R |*P | . | | . | | . |

> +---+---+---+---+---+---+---+---+

> |*K |*P | . | | . | | . | |

> +---+---+---+---+---+---+---+---+

> |*P | . | | . | | . | | . |

> +---+---+---+---+---+---+---+---+

> | Q | | P | | . | | . | |

> +---+---+---+---+---+---+---+---+

> | P | P |*R | P | P | . | | P |

> +---+---+---+---+---+---+---+---+

> | K | | . | | . | | . | |

> +---+---+---+---+---+---+---+---+

> (13+6)Add units


How is the cage around the white rook on c7 released? b7 came from g2, the 
bishop on c8 must get there before white captures c6xb7, after that black plays 
c7-c6 but now the rook can't get to c7. Or am I missing something?

Joost