[Retros] series SPG

[Goran Wicklund]

Jonathan Mestel found a cook, using 0-0.
Here is another (shorter) try:


8/8/2B5/2BR3R/Q1PP3P/PPK1P1P1/3N1P2/7N
+---+---+---+---+---+---+---+---+

|   | . |   | . |   | . |   | . |

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

| . |   | . |   | . |   | . |   |

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

|   | . | B | . |   | . |   | . |

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

| . |   | B | R | . |   | . | R |

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

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

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

| P | P | K |   | P |   | P |   |

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

|   | . |   | N |   | P |   | . |

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

| . |   | . |   | . |   | . | N |

+---+---+---+---+---+---+---+---+
 16 + 0  SPG 26
 
 Göran Wicklund



> 

> > From: Richard Stanley <rstan at math.mit.edu>

> > To: retros at janko.at

> > Date: Thu, 2 May 2002 11:22:12 -0400 (EDT)

> > 

> > 

> > Here is a variation of Noam Elkies' request for a dual-free SPG in

> > which every unit moves. Remove all Black units from the board. What is

> > the maximum number of White units that can move in a dual-free series

> > SPG? I can do 14 (if sound), but presumably that can be improved. The

> > same question can be asked without first removing the Black units.

> > 

> > Richard

> > 

> 

> Here is try to move 15 white units. It should also work with the

> black units on board: 

> 

> 8/6Q1/5B2/R3RBN1/P3PP1K/1P1P2PP/2P5/N7

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

> |   | . |   | . |   | . |   | . |

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

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

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

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

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

> | R |   | . |   | R | B | N |   |

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

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

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

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

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

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

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

> | N |   | . |   | . |   | . |   |

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

>  16 + 0  SPG 28  No black units on board

>  

>  

>  Göran Wicklund

> 

> 

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