[Retros] Double Edgemovers

[Juha Saukkola]

Shortest correct [Double Edgemover] SPG & mate (with Popeye):
1.a5 h4
2.a4
 Rh3
3.a3 Rxa3
4.Sh6 Rxa8
5.Sa6 Rxc8
6.Sb8 Rxb8
7.Qc8 
Rxc8 #

Here is more difficult question:
What is the shortest game to position with only 10 pieces with Double Edgemover?  
 		 	   		  
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