The R is used in Slovakian Bonitation and describes the whole impression of the dog.
Example for type R1 (dry):
http://dl.wolfdog.org/pics/dbase/Chester_Zlata_Palz.jpg
http://dl.wolfdog.org/pics/dbase/Arek_Maly_Bystrec.jpg
Example for type R2 (rough):
http://www.wolfdog.org/pics2/2007/8/...84-5695254.jpg
http://www.wolfdog.org/pics2/2007/8/...83-4065404.jpg
It is difficult to see it on photos, it is better to see the dogs in real and compare them directly.
The R1 type is the wished one. It schould have no loose skin, good muscular structure and a firm back and should have the typical wolfish light movements.