Explanation of the score evaluation and “TSB” Rating:  
Often you’ll hear a breeder or competitor brag about a “V-rating” and so you should!  It is a big deal to accomplish such a high score on trial day.  But not everyone knows what this means.  Below is the explanation of the ratings for a Schutzhund score.  Single events such as tracking or obedience titles are scored out of a total of 100 points.  The rest of the titles such as VPG 1, 2 & 3 are scored out of 300 points, 100 points each for Tracking, Obedience and Protection.  The VPG A which does not include Tracking is scored out of 200 points.  The corresponding letters, V, SG, G, B and M are the initials of the German words used to describe the ratings.
Score Evaluation:  As copied from the DVG Trial Rules (2004)
Maximum Points	Excellent (V)	Very Good (SG)	Good (G)	Satisfactory (B) 	Unsatisfactory (M)	
100 Points	100-96	95-90	89-80	79-70	69-0	
300 Points	300-286	285-270	269-240	239-210	209-0	
200 Points
(VPG A)	200-192	191-180	179-160	159-140	139-0	

The “TSB” Rating Explained:  As copied from the DVG Trial Rules (2004)
The “TSB”-Evaluation should serve the purpose of describing a dog’s character traits in regards to breeding suitability.  The “TSB” Rating neither influences the trial results nor influences the trial ranking.  A dog must complete at least one protection exercise to receive a “TSB” Rating.
The rating of pronounced (a), present (vh), and insufficient (ng) describe the following characteristics:  
Triebveranlagung (instinctive behaviour) 
Selbstsicherheit (assertiveness) 
Belastbarkeit (resilience).  
TSB “pronounced” (ausgeprägt)
Is given to a dog that shows strong willingness to work, clear instinctive behaviour, determination in its performance; appears self-confident, pays undivided attention and is capable of coping with a severe amount of stress.
TSB “present” (vorhanden)
Is given to a dog that has limitations concerning its willingness to work, instinctive behaviour, self-confidence, attentiveness and ability to cope with stress.
TSB “insufficient” (nicht genügend)
Is given to a dog with insufficient willingness to work, insufficient instinctive behaviour, lacking self-confidence and that has insufficient ability to cope with stress.
To judge a dog, either good or bad, for breeding suitability based on one event is not practical.  Breeding stock should be titled multiple times to allow for dumb luck or bad luck circumstances to accurately portray the qualities listed above.  Different judges will see different things in a dog, and different trail conditions can also bring out the best or worst in a dog.  Breeding should be done (or not done) once a dog has some consistency in its TSB rating.