My number is now close to 800, this assumed some numbers given by others in competitions I didn't research yet.
I would say around 805 is indeed the correct number but not by the counting they did before, that is a coincidence.
BTW IFFHS has updated Bican's data:
http://www.rsssf.com/players/pbicandata.html
They now say it's 948 goals+ goals and they have another player with even more goals: Erwin Helmchen from Germany with 981+ goals
http://www.rsssf.com/players/prolific.html
This guy seems to have played mostly for PSV Chemnitz
On their Bican number they still keep counting games with the reserves, winter tournaments, Bohemia - Moravia games (not actual internationals, this was during WWII and the actual country, the protectorate of Bohemia and Moravia was not allowed to play by nazi germany orders) and games between cities (kinda like city all stars).
These competitions make no sense to me to be included.
In their overall player comparison I posted the link above they use a "top level only" goals, ignoring reserves and 2nd and 3rd divisions, etc, in that account Bican has only 743 goals, Ronaldo has 762 and Pelé is on top with 769.
IMHO reserves should not be included but 2nd and 3rd divisions should as they are part of a national league structure so they're pretty much super official., sure we can point that out the lower "class" goals but I think they should count.
I'm hitting a wall on post 1950 goals from my sources but I'll check more on if I can get them somewhere else.
Soon I'll make a post with all my numbers and the "proofs" that they are correct.