How strong is each level of Atari 2600's Video Chess? I used to play Video Chess on Atari with my dad when I was a kid.  What is the approximate FIDE rating of each level?
Atari 2600 has bugs which make the higher levels unrateable. It is reputed to be slightly better than Microchess, according to a chess.com article.

Atari had a very limited book which makes it weaker than current approaches. 

An ESTIMATE of the strength is as follows:

Level Time Rating(?):

8        10       700

1        15       800

2        30      1000

3        45      1100

4       165      1300

5       195      1350

6       720        ??

7     36000        ??