[Retros] Hit Team theme progress

[Nicolas Dupont]

>> (1) What I was proposing here with "Hit Team" is the idea that all   
>>   surviving units from both sides are homebase, *except* for the     
>> mating units.

Here is a non-ambiguous solution (with a single mating unit):

1. Pd2-d4   Pc7-c5     2. Fc1-h6   Pc5xd4     3. Dd1xd4   Dd8-c7
4. Dd4xa7   Dc7xh2     5. Da7-e3   Dh2xh6     6. De3-c1   Dh6xc1#