David P Bird wrote:While it's gone quiet here...

I've been exploring the possible configurations of the target cells in different types of single and double JEs with paired target cells in different boxes.

- Code: Select all

*-------*-------*-------* *-------*-------*-------* *-------*-------*-------*

| B B \ | . t . | . . . | | B B t | . t . | . . . | | B B t | . t . | . . . |

| . . t | . \ . | T . . | | . . \ | . \ . | T . . | | . . \ | . \ . | \ . . |

| . . . | . T . | \ b b | | . . . | . T . | \ b b | | . . . | . T . | T b b |

*-------*-------*-------* *-------*-------*-------* *-------*-------*-------*

JE4DD JE4DC JE4CC

...

Hi David,

as often, we have slightly different views on the same facts.

I have to revise seriously my code establishing the double exocet pattern, so I studied yours patterns.

To have a wording very close to what I can put in code, I would write that in the following way.

A) JE4 + JE 4 (same four digits, same band, 2 different boxes for the base)

- if one base see the 2 targets of the other JE, then the double exocet is established

this cover all your patterns except JE4CC and JE4DD

-if all targets share the same unit, then the double exocet is established (JE4CC)

-if each base see a target of the other exocet and the 2 other targets share the same unit then the double exocet is established (JE4DD)

B) JE3 + JE3

here, none base can see the 2 other targets, the puzzle would have no solution

and for the same reason, the four targets can not share the same unit.

At the end, I strongly believe that one target must be common to both exocets. That target ins in the thir line and in the third row as in you diagrams.

- it is then enough that one base sees one target of the other exocet to have the double exocet established.

In that case, the 2 exocets share one digit and have one of the 2 others digits as second digit in base

All your diagrams fill that condition.

I see a small window with the 3 target in a mini row but I don't know if it is realistic.

C) JE4 + JE3

we have seen that in a former post.

The rules to apply to the 3 digits base are the same as for a 2*JE4 ;

I'll study several cases to have the relevant rules