score:4
Schengen type B visas were abolished in 2010 when the Visa Code went into force.
The site you link to (which is a commercial site and not official government information) simply hasn't been updated. Given that it cheerfully reproduces information that has been out of date for six years now, you should probably not trust anything it says.
These days, if you want or need to leave an airport during a layover and you're not visa-free, you need to apply for an ordinary type C short-stay visa from the first Schengen country you plan to enter.